-/* $Id: nurbssrf.c,v 1.1 1999/08/19 00:55:42 jtg Exp $ */
/*
* Mesa 3-D graphics library
- * Version: 2.4
- * Copyright (C) 1995-1997 Brian Paul
+ * Version: 3.3
+ * Copyright (C) 1995-2000 Brian Paul
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
*/
-/*
- * $Log: nurbssrf.c,v $
- * Revision 1.1 1999/08/19 00:55:42 jtg
- * Initial revision
- *
- * Revision 1.7 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * Revision 1.6 1997/06/23 00:22:07 brianp
- * include <string.h>
- *
- * Revision 1.5 1997/05/28 02:29:38 brianp
- * added support for precompiled headers (PCH), inserted APIENTRY keyword
- *
- * Revision 1.4 1997/05/27 03:20:35 brianp
- * minor clean-up
- *
- * Revision 1.3 1997/05/27 03:00:16 brianp
- * incorporated Bogdan's new NURBS code
- *
- * Revision 1.2 1996/09/27 23:13:02 brianp
- * added return 0 to get_surface_dim() to silence warning
- *
- * Revision 1.1 1996/09/27 01:19:39 brianp
- * Initial revision
- *
- */
-
-
/*
* NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
* See README2 for more info.
static int
get_surface_dim(GLenum type)
{
- switch(type)
- {
- case GL_MAP2_VERTEX_3: return 3;
- case GL_MAP2_VERTEX_4: return 4;
- case GL_MAP2_INDEX: return 1;
- case GL_MAP2_COLOR_4: return 4;
- case GL_MAP2_NORMAL: return 3;
- case GL_MAP2_TEXTURE_COORD_1: return 1;
- case GL_MAP2_TEXTURE_COORD_2: return 2;
- case GL_MAP2_TEXTURE_COORD_3: return 3;
- case GL_MAP2_TEXTURE_COORD_4: return 4;
- default: abort(); /* TODO: is this OK? */
- }
- return 0; /*never get here*/
+ switch (type) {
+ case GL_MAP2_VERTEX_3:
+ return 3;
+ case GL_MAP2_VERTEX_4:
+ return 4;
+ case GL_MAP2_INDEX:
+ return 1;
+ case GL_MAP2_COLOR_4:
+ return 4;
+ case GL_MAP2_NORMAL:
+ return 3;
+ case GL_MAP2_TEXTURE_COORD_1:
+ return 1;
+ case GL_MAP2_TEXTURE_COORD_2:
+ return 2;
+ case GL_MAP2_TEXTURE_COORD_3:
+ return 3;
+ case GL_MAP2_TEXTURE_COORD_4:
+ return 4;
+ default:
+ abort(); /* TODO: is this OK? */
+ }
+ return 0; /*never get here */
}
static GLenum
-test_nurbs_surface(GLUnurbsObj *nobj, surface_attribs *attrib)
+test_nurbs_surface(GLUnurbsObj * nobj, surface_attribs * attrib)
{
- GLenum err;
- GLint tmp_int;
+ GLenum err;
+ GLint tmp_int;
- if(attrib->sorder < 0 || attrib->torder < 0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return GLU_ERROR;
- }
- glGetIntegerv(GL_MAX_EVAL_ORDER,&tmp_int);
- if(attrib->sorder > tmp_int || attrib->sorder < 2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if(attrib->torder > tmp_int || attrib->torder < 2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if(attrib->sknot_count < attrib->sorder +2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if(attrib->tknot_count < attrib->torder +2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if(attrib->s_stride < 0 || attrib->t_stride < 0)
- {
- call_user_error(nobj,GLU_NURBS_ERROR34);
- return GLU_ERROR;
- }
- if(attrib->sknot==NULL || attrib->tknot==NULL || attrib->ctrlarray==NULL)
- {
- call_user_error(nobj,GLU_NURBS_ERROR36);
- return GLU_ERROR;
- }
- if((err=test_knot(attrib->tknot_count,attrib->tknot,attrib->torder))
- !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- if((err=test_knot(attrib->sknot_count,attrib->sknot,attrib->sorder))
- !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
+ if (attrib->sorder < 0 || attrib->torder < 0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return GLU_ERROR;
+ }
+ glGetIntegerv(GL_MAX_EVAL_ORDER, &tmp_int);
+ if (attrib->sorder > tmp_int || attrib->sorder < 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR1);
+ return GLU_ERROR;
+ }
+ if (attrib->torder > tmp_int || attrib->torder < 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR1);
+ return GLU_ERROR;
+ }
+ if (attrib->sknot_count < attrib->sorder + 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR2);
+ return GLU_ERROR;
+ }
+ if (attrib->tknot_count < attrib->torder + 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR2);
+ return GLU_ERROR;
+ }
+ if (attrib->s_stride < 0 || attrib->t_stride < 0) {
+ call_user_error(nobj, GLU_NURBS_ERROR34);
+ return GLU_ERROR;
+ }
+ if (attrib->sknot == NULL || attrib->tknot == NULL
+ || attrib->ctrlarray == NULL) {
+ call_user_error(nobj, GLU_NURBS_ERROR36);
+ return GLU_ERROR;
+ }
+ if ((err = test_knot(attrib->tknot_count, attrib->tknot, attrib->torder))
+ != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ if ((err = test_knot(attrib->sknot_count, attrib->sknot, attrib->sorder))
+ != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ return GLU_NO_ERROR;
}
static GLenum
-test_nurbs_surfaces(GLUnurbsObj *nobj)
+test_nurbs_surfaces(GLUnurbsObj * nobj)
{
- /* test the geometric data */
- if(test_nurbs_surface(nobj,&(nobj->surface.geom))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* now test the attributive data */
- /* color */
- if(nobj->surface.color.type!=GLU_INVALID_ENUM)
- if(test_nurbs_surface(nobj,&(nobj->surface.color))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* normal */
- if(nobj->surface.normal.type!=GLU_INVALID_ENUM)
- if(test_nurbs_surface(nobj,&(nobj->surface.normal))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* texture */
- if(nobj->surface.texture.type!=GLU_INVALID_ENUM)
- if(test_nurbs_surface(nobj,&(nobj->surface.texture))!=GLU_NO_ERROR)
- return GLU_ERROR;
- return GLU_NO_ERROR;
+ /* test the geometric data */
+ if (test_nurbs_surface(nobj, &(nobj->surface.geom)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* now test the attributive data */
+ /* color */
+ if (nobj->surface.color.type != GLU_INVALID_ENUM)
+ if (test_nurbs_surface(nobj, &(nobj->surface.color)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* normal */
+ if (nobj->surface.normal.type != GLU_INVALID_ENUM)
+ if (test_nurbs_surface(nobj, &(nobj->surface.normal)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* texture */
+ if (nobj->surface.texture.type != GLU_INVALID_ENUM)
+ if (test_nurbs_surface(nobj, &(nobj->surface.texture)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ return GLU_NO_ERROR;
}
static GLenum
-convert_surf(knot_str_type *s_knot, knot_str_type *t_knot,
- surface_attribs *attrib, GLfloat **new_ctrl,
- GLint *s_n_ctrl, GLint *t_n_ctrl)
+convert_surf(knot_str_type * s_knot, knot_str_type * t_knot,
+ surface_attribs * attrib, GLfloat ** new_ctrl,
+ GLint * s_n_ctrl, GLint * t_n_ctrl)
{
- GLfloat **tmp_ctrl;
- GLfloat *ctrl_offset;
- GLint tmp_n_control;
- GLint i,j,t_cnt,s_cnt;
- GLint tmp_stride;
- GLint dim;
- GLenum err;
+ GLfloat **tmp_ctrl;
+ GLfloat *ctrl_offset;
+ GLint tmp_n_control;
+ GLint i, j, t_cnt, s_cnt;
+ GLint tmp_stride;
+ GLint dim;
+ GLenum err;
- /* valid range is empty? */
- if((s_knot->unified_knot !=NULL && s_knot->unified_nknots==0) ||
- (t_knot->unified_knot !=NULL && t_knot->unified_nknots==0))
- {
- if(s_knot->unified_knot)
- {
- free(s_knot->unified_knot);
- s_knot->unified_knot=NULL;
- }
- if(t_knot->unified_knot)
- {
- free(t_knot->unified_knot);
- t_knot->unified_knot=NULL;
- }
- *s_n_ctrl=0;
- *t_n_ctrl=0;
- return GLU_NO_ERROR;
- }
- t_cnt=attrib->tknot_count-attrib->torder;
- s_cnt=attrib->sknot_count-attrib->sorder;
- if((tmp_ctrl=(GLfloat **)malloc(sizeof(GLfloat *)*t_cnt))==NULL)
- return GLU_OUT_OF_MEMORY;
- if((err=explode_knot(s_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- if(s_knot->unified_knot)
- {
- free(s_knot->unified_knot);
- s_knot->unified_knot=NULL;
- }
- return err;
- }
- if(s_knot->unified_knot)
- {
- free(s_knot->unified_knot);
- s_knot->unified_knot=NULL;
- }
- if((err=calc_alphas(s_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- free(s_knot->new_knot);
- return err;
- }
- free(s_knot->new_knot);
- ctrl_offset=attrib->ctrlarray;
- dim=attrib->dim;
- for(i=0;i<t_cnt;i++)
- {
- if((err=calc_new_ctrl_pts(ctrl_offset,attrib->s_stride,s_knot,
- dim,&(tmp_ctrl[i]),&tmp_n_control))!=GLU_NO_ERROR)
- {
- for(--i;i<=0;i--)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- free(s_knot->alpha);
- return err;
- }
- ctrl_offset+=attrib->t_stride;
- }
- free(s_knot->alpha);
- tmp_stride=dim*tmp_n_control;
- if((*new_ctrl=(GLfloat *)malloc(sizeof(GLfloat)*tmp_stride*t_cnt))
- ==NULL)
- {
- for(i=0;i<t_cnt;i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- return GLU_OUT_OF_MEMORY;
- }
- for(i=0;i<tmp_n_control;i++)
- for(j=0;j<t_cnt;j++)
- MEMCPY(*new_ctrl+j*dim+i*dim*t_cnt,tmp_ctrl[j]+dim*i,
- sizeof(GLfloat)*dim);
- for(i=0;i<t_cnt;i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- *s_n_ctrl=tmp_n_control;
-
- if((tmp_ctrl=(GLfloat **)malloc(sizeof(GLfloat *)*(*s_n_ctrl)))==NULL)
- {
- return GLU_OUT_OF_MEMORY;
- }
- if((err=explode_knot(t_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- if(t_knot->unified_knot)
- {
- free(t_knot->unified_knot);
- t_knot->unified_knot=NULL;
- }
- return err;
- }
- if(t_knot->unified_knot)
- {
- free(t_knot->unified_knot);
- t_knot->unified_knot=NULL;
- }
- if((err=calc_alphas(t_knot))!=GLU_NO_ERROR)
- {
- free(tmp_ctrl);
- free(t_knot->new_knot);
- return err;
- }
- free(t_knot->new_knot);
- ctrl_offset=*new_ctrl;
- for(i=0;i<(*s_n_ctrl);i++)
- {
- if((err=calc_new_ctrl_pts(ctrl_offset,dim,t_knot,
- dim,&(tmp_ctrl[i]),&tmp_n_control))!=GLU_NO_ERROR)
- {
- for(--i;i<=0;i--)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- free(t_knot->alpha);
- return err;
- }
- ctrl_offset+=dim*t_cnt;
- }
- free(t_knot->alpha);
- free(*new_ctrl);
- tmp_stride=dim*tmp_n_control;
- if((*new_ctrl=(GLfloat *)malloc(sizeof(GLfloat)*tmp_stride*(*s_n_ctrl)))
- ==NULL)
- {
- for(i=0;i<(*s_n_ctrl);i++)
- free(tmp_ctrl[i]);
- free(tmp_ctrl);
- return GLU_OUT_OF_MEMORY;
- }
- for(i=0;i<(*s_n_ctrl);i++)
- {
- MEMCPY(*new_ctrl+i*tmp_stride,tmp_ctrl[i],sizeof(GLfloat)*tmp_stride);
- free(tmp_ctrl[i]);
- }
- free(tmp_ctrl);
- *t_n_ctrl=tmp_n_control;
- return GLU_NO_ERROR;
+ /* valid range is empty? */
+ if ((s_knot->unified_knot != NULL && s_knot->unified_nknots == 0) ||
+ (t_knot->unified_knot != NULL && t_knot->unified_nknots == 0)) {
+ if (s_knot->unified_knot) {
+ free(s_knot->unified_knot);
+ s_knot->unified_knot = NULL;
+ }
+ if (t_knot->unified_knot) {
+ free(t_knot->unified_knot);
+ t_knot->unified_knot = NULL;
+ }
+ *s_n_ctrl = 0;
+ *t_n_ctrl = 0;
+ return GLU_NO_ERROR;
+ }
+ t_cnt = attrib->tknot_count - attrib->torder;
+ s_cnt = attrib->sknot_count - attrib->sorder;
+ if ((tmp_ctrl = (GLfloat **) malloc(sizeof(GLfloat *) * t_cnt)) == NULL)
+ return GLU_OUT_OF_MEMORY;
+ if ((err = explode_knot(s_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ if (s_knot->unified_knot) {
+ free(s_knot->unified_knot);
+ s_knot->unified_knot = NULL;
+ }
+ return err;
+ }
+ if (s_knot->unified_knot) {
+ free(s_knot->unified_knot);
+ s_knot->unified_knot = NULL;
+ }
+ if ((err = calc_alphas(s_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ free(s_knot->new_knot);
+ return err;
+ }
+ free(s_knot->new_knot);
+ ctrl_offset = attrib->ctrlarray;
+ dim = attrib->dim;
+ for (i = 0; i < t_cnt; i++) {
+ if ((err = calc_new_ctrl_pts(ctrl_offset, attrib->s_stride, s_knot,
+ dim, &(tmp_ctrl[i]),
+ &tmp_n_control)) != GLU_NO_ERROR) {
+ for (--i; i <= 0; i--)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ free(s_knot->alpha);
+ return err;
+ }
+ ctrl_offset += attrib->t_stride;
+ }
+ free(s_knot->alpha);
+ tmp_stride = dim * tmp_n_control;
+ if ((*new_ctrl = (GLfloat *) malloc(sizeof(GLfloat) * tmp_stride * t_cnt))
+ == NULL) {
+ for (i = 0; i < t_cnt; i++)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ return GLU_OUT_OF_MEMORY;
+ }
+ for (i = 0; i < tmp_n_control; i++)
+ for (j = 0; j < t_cnt; j++)
+ MEMCPY(*new_ctrl + j * dim + i * dim * t_cnt, tmp_ctrl[j] + dim * i,
+ sizeof(GLfloat) * dim);
+ for (i = 0; i < t_cnt; i++)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ *s_n_ctrl = tmp_n_control;
+
+ if ((tmp_ctrl = (GLfloat **) malloc(sizeof(GLfloat *) * (*s_n_ctrl))) ==
+ NULL) {
+ return GLU_OUT_OF_MEMORY;
+ }
+ if ((err = explode_knot(t_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ if (t_knot->unified_knot) {
+ free(t_knot->unified_knot);
+ t_knot->unified_knot = NULL;
+ }
+ return err;
+ }
+ if (t_knot->unified_knot) {
+ free(t_knot->unified_knot);
+ t_knot->unified_knot = NULL;
+ }
+ if ((err = calc_alphas(t_knot)) != GLU_NO_ERROR) {
+ free(tmp_ctrl);
+ free(t_knot->new_knot);
+ return err;
+ }
+ free(t_knot->new_knot);
+ ctrl_offset = *new_ctrl;
+ for (i = 0; i < (*s_n_ctrl); i++) {
+ if ((err = calc_new_ctrl_pts(ctrl_offset, dim, t_knot,
+ dim, &(tmp_ctrl[i]),
+ &tmp_n_control)) != GLU_NO_ERROR) {
+ for (--i; i <= 0; i--)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ free(t_knot->alpha);
+ return err;
+ }
+ ctrl_offset += dim * t_cnt;
+ }
+ free(t_knot->alpha);
+ free(*new_ctrl);
+ tmp_stride = dim * tmp_n_control;
+ if (
+ (*new_ctrl =
+ (GLfloat *) malloc(sizeof(GLfloat) * tmp_stride * (*s_n_ctrl))) ==
+ NULL) {
+ for (i = 0; i < (*s_n_ctrl); i++)
+ free(tmp_ctrl[i]);
+ free(tmp_ctrl);
+ return GLU_OUT_OF_MEMORY;
+ }
+ for (i = 0; i < (*s_n_ctrl); i++) {
+ MEMCPY(*new_ctrl + i * tmp_stride, tmp_ctrl[i],
+ sizeof(GLfloat) * tmp_stride);
+ free(tmp_ctrl[i]);
+ }
+ free(tmp_ctrl);
+ *t_n_ctrl = tmp_n_control;
+ return GLU_NO_ERROR;
}
/* prepare the knot information structures */
static GLenum
-fill_knot_structures(GLUnurbsObj *nobj,
- knot_str_type *geom_s_knot, knot_str_type *geom_t_knot,
- knot_str_type *color_s_knot, knot_str_type *color_t_knot,
- knot_str_type *normal_s_knot, knot_str_type *normal_t_knot,
- knot_str_type *texture_s_knot, knot_str_type *texture_t_knot)
+fill_knot_structures(GLUnurbsObj * nobj,
+ knot_str_type * geom_s_knot, knot_str_type * geom_t_knot,
+ knot_str_type * color_s_knot,
+ knot_str_type * color_t_knot,
+ knot_str_type * normal_s_knot,
+ knot_str_type * normal_t_knot,
+ knot_str_type * texture_s_knot,
+ knot_str_type * texture_t_knot)
{
- GLint order;
- GLfloat *knot;
- GLint nknots;
- GLint t_min,t_max;
+ GLint order;
+ GLfloat *knot;
+ GLint nknots;
+ GLint t_min, t_max;
- geom_s_knot->unified_knot=NULL;
- knot=geom_s_knot->knot=nobj->surface.geom.sknot;
- nknots=geom_s_knot->nknots=nobj->surface.geom.sknot_count;
- order=geom_s_knot->order=nobj->surface.geom.sorder;
- geom_s_knot->delta_nknots=0;
- t_min=geom_s_knot->t_min=order-1;
- t_max=geom_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- geom_s_knot->open_at_begin=GL_TRUE;
- }
- else
- geom_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- geom_s_knot->open_at_end=GL_TRUE;
- }
- else
- geom_s_knot->open_at_end=GL_FALSE;
- geom_t_knot->unified_knot=NULL;
- knot=geom_t_knot->knot=nobj->surface.geom.tknot;
- nknots=geom_t_knot->nknots=nobj->surface.geom.tknot_count;
- order=geom_t_knot->order=nobj->surface.geom.torder;
- geom_t_knot->delta_nknots=0;
- t_min=geom_t_knot->t_min=order-1;
- t_max=geom_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- geom_t_knot->open_at_begin=GL_TRUE;
- }
- else
- geom_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- geom_t_knot->open_at_end=GL_TRUE;
- }
- else
- geom_t_knot->open_at_end=GL_FALSE;
+ geom_s_knot->unified_knot = NULL;
+ knot = geom_s_knot->knot = nobj->surface.geom.sknot;
+ nknots = geom_s_knot->nknots = nobj->surface.geom.sknot_count;
+ order = geom_s_knot->order = nobj->surface.geom.sorder;
+ geom_s_knot->delta_nknots = 0;
+ t_min = geom_s_knot->t_min = order - 1;
+ t_max = geom_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ geom_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ geom_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ geom_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ geom_s_knot->open_at_end = GL_FALSE;
+ geom_t_knot->unified_knot = NULL;
+ knot = geom_t_knot->knot = nobj->surface.geom.tknot;
+ nknots = geom_t_knot->nknots = nobj->surface.geom.tknot_count;
+ order = geom_t_knot->order = nobj->surface.geom.torder;
+ geom_t_knot->delta_nknots = 0;
+ t_min = geom_t_knot->t_min = order - 1;
+ t_max = geom_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ geom_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ geom_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ geom_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ geom_t_knot->open_at_end = GL_FALSE;
- if(nobj->surface.color.type!=GLU_INVALID_ENUM)
- {
- color_s_knot->unified_knot=(GLfloat *)1;
- knot=color_s_knot->knot=nobj->surface.color.sknot;
- nknots=color_s_knot->nknots=nobj->surface.color.sknot_count;
- order=color_s_knot->order=nobj->surface.color.sorder;
- color_s_knot->delta_nknots=0;
- t_min=color_s_knot->t_min=order-1;
- t_max=color_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- color_s_knot->open_at_begin=GL_TRUE;
- }
- else
- color_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- color_s_knot->open_at_end=GL_TRUE;
- }
- else
- color_s_knot->open_at_end=GL_FALSE;
- color_t_knot->unified_knot=(GLfloat *)1;
- knot=color_t_knot->knot=nobj->surface.color.tknot;
- nknots=color_t_knot->nknots=nobj->surface.color.tknot_count;
- order=color_t_knot->order=nobj->surface.color.torder;
- color_t_knot->delta_nknots=0;
- t_min=color_t_knot->t_min=order-1;
- t_max=color_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- color_t_knot->open_at_begin=GL_TRUE;
- }
- else
- color_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- color_t_knot->open_at_end=GL_TRUE;
- }
- else
- color_t_knot->open_at_end=GL_FALSE;
- }
- else
- {
- color_s_knot->unified_knot=NULL;
- color_t_knot->unified_knot=NULL;
- }
+ if (nobj->surface.color.type != GLU_INVALID_ENUM) {
+ color_s_knot->unified_knot = (GLfloat *) 1;
+ knot = color_s_knot->knot = nobj->surface.color.sknot;
+ nknots = color_s_knot->nknots = nobj->surface.color.sknot_count;
+ order = color_s_knot->order = nobj->surface.color.sorder;
+ color_s_knot->delta_nknots = 0;
+ t_min = color_s_knot->t_min = order - 1;
+ t_max = color_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ color_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ color_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ color_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ color_s_knot->open_at_end = GL_FALSE;
+ color_t_knot->unified_knot = (GLfloat *) 1;
+ knot = color_t_knot->knot = nobj->surface.color.tknot;
+ nknots = color_t_knot->nknots = nobj->surface.color.tknot_count;
+ order = color_t_knot->order = nobj->surface.color.torder;
+ color_t_knot->delta_nknots = 0;
+ t_min = color_t_knot->t_min = order - 1;
+ t_max = color_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ color_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ color_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ color_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ color_t_knot->open_at_end = GL_FALSE;
+ }
+ else {
+ color_s_knot->unified_knot = NULL;
+ color_t_knot->unified_knot = NULL;
+ }
- if(nobj->surface.normal.type!=GLU_INVALID_ENUM)
- {
- normal_s_knot->unified_knot=(GLfloat *)1;
- knot=normal_s_knot->knot=nobj->surface.normal.sknot;
- nknots=normal_s_knot->nknots=nobj->surface.normal.sknot_count;
- order=normal_s_knot->order=nobj->surface.normal.sorder;
- normal_s_knot->delta_nknots=0;
- t_min=normal_s_knot->t_min=order-1;
- t_max=normal_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- normal_s_knot->open_at_begin=GL_TRUE;
- }
- else
- normal_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- normal_s_knot->open_at_end=GL_TRUE;
- }
- else
- normal_s_knot->open_at_end=GL_FALSE;
- normal_t_knot->unified_knot=(GLfloat *)1;
- knot=normal_t_knot->knot=nobj->surface.normal.tknot;
- nknots=normal_t_knot->nknots=nobj->surface.normal.tknot_count;
- order=normal_t_knot->order=nobj->surface.normal.torder;
- normal_t_knot->delta_nknots=0;
- t_min=normal_t_knot->t_min=order-1;
- t_max=normal_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- normal_t_knot->open_at_begin=GL_TRUE;
- }
- else
- normal_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- normal_t_knot->open_at_end=GL_TRUE;
- }
- else
- normal_t_knot->open_at_end=GL_FALSE;
- }
- else
- {
- normal_s_knot->unified_knot=NULL;
- normal_t_knot->unified_knot=NULL;
- }
+ if (nobj->surface.normal.type != GLU_INVALID_ENUM) {
+ normal_s_knot->unified_knot = (GLfloat *) 1;
+ knot = normal_s_knot->knot = nobj->surface.normal.sknot;
+ nknots = normal_s_knot->nknots = nobj->surface.normal.sknot_count;
+ order = normal_s_knot->order = nobj->surface.normal.sorder;
+ normal_s_knot->delta_nknots = 0;
+ t_min = normal_s_knot->t_min = order - 1;
+ t_max = normal_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ normal_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ normal_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ normal_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ normal_s_knot->open_at_end = GL_FALSE;
+ normal_t_knot->unified_knot = (GLfloat *) 1;
+ knot = normal_t_knot->knot = nobj->surface.normal.tknot;
+ nknots = normal_t_knot->nknots = nobj->surface.normal.tknot_count;
+ order = normal_t_knot->order = nobj->surface.normal.torder;
+ normal_t_knot->delta_nknots = 0;
+ t_min = normal_t_knot->t_min = order - 1;
+ t_max = normal_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ normal_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ normal_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ normal_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ normal_t_knot->open_at_end = GL_FALSE;
+ }
+ else {
+ normal_s_knot->unified_knot = NULL;
+ normal_t_knot->unified_knot = NULL;
+ }
- if(nobj->surface.texture.type!=GLU_INVALID_ENUM)
- {
- texture_s_knot->unified_knot=(GLfloat *)1;
- knot=texture_s_knot->knot=nobj->surface.texture.sknot;
- nknots=texture_s_knot->nknots=nobj->surface.texture.sknot_count;
- order=texture_s_knot->order=nobj->surface.texture.sorder;
- texture_s_knot->delta_nknots=0;
- t_min=texture_s_knot->t_min=order-1;
- t_max=texture_s_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- texture_s_knot->open_at_begin=GL_TRUE;
- }
- else
- texture_s_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- texture_s_knot->open_at_end=GL_TRUE;
- }
- else
- texture_s_knot->open_at_end=GL_FALSE;
- texture_t_knot->unified_knot=(GLfloat *)1;
- knot=texture_t_knot->knot=nobj->surface.texture.tknot;
- nknots=texture_t_knot->nknots=nobj->surface.texture.tknot_count;
- order=texture_t_knot->order=nobj->surface.texture.torder;
- texture_t_knot->delta_nknots=0;
- t_min=texture_t_knot->t_min=order-1;
- t_max=texture_t_knot->t_max=nknots-order;
- if(fabs(knot[t_min]-knot[t_max])<EPSILON)
- {
- call_user_error(nobj,GLU_NURBS_ERROR3);
- return GLU_ERROR;
- }
- if(fabs(knot[0]-knot[t_min])<EPSILON)
- {
- /* knot open at beggining */
- texture_t_knot->open_at_begin=GL_TRUE;
- }
- else
- texture_t_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- texture_t_knot->open_at_end=GL_TRUE;
- }
- else
- texture_t_knot->open_at_end=GL_FALSE;
- }
- else
- {
- texture_s_knot->unified_knot=NULL;
- texture_t_knot->unified_knot=NULL;
- }
- return GLU_NO_ERROR;
+ if (nobj->surface.texture.type != GLU_INVALID_ENUM) {
+ texture_s_knot->unified_knot = (GLfloat *) 1;
+ knot = texture_s_knot->knot = nobj->surface.texture.sknot;
+ nknots = texture_s_knot->nknots = nobj->surface.texture.sknot_count;
+ order = texture_s_knot->order = nobj->surface.texture.sorder;
+ texture_s_knot->delta_nknots = 0;
+ t_min = texture_s_knot->t_min = order - 1;
+ t_max = texture_s_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ texture_s_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ texture_s_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ texture_s_knot->open_at_end = GL_TRUE;
+ }
+ else
+ texture_s_knot->open_at_end = GL_FALSE;
+ texture_t_knot->unified_knot = (GLfloat *) 1;
+ knot = texture_t_knot->knot = nobj->surface.texture.tknot;
+ nknots = texture_t_knot->nknots = nobj->surface.texture.tknot_count;
+ order = texture_t_knot->order = nobj->surface.texture.torder;
+ texture_t_knot->delta_nknots = 0;
+ t_min = texture_t_knot->t_min = order - 1;
+ t_max = texture_t_knot->t_max = nknots - order;
+ if (fabs(knot[t_min] - knot[t_max]) < EPSILON) {
+ call_user_error(nobj, GLU_NURBS_ERROR3);
+ return GLU_ERROR;
+ }
+ if (fabs(knot[0] - knot[t_min]) < EPSILON) {
+ /* knot open at beggining */
+ texture_t_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ texture_t_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ texture_t_knot->open_at_end = GL_TRUE;
+ }
+ else
+ texture_t_knot->open_at_end = GL_FALSE;
+ }
+ else {
+ texture_s_knot->unified_knot = NULL;
+ texture_t_knot->unified_knot = NULL;
+ }
+ return GLU_NO_ERROR;
}
-void
-free_new_ctrl(new_ctrl_type *p)
+
+static void
+free_new_ctrl(new_ctrl_type * p)
{
- if(p->geom_ctrl)
- free(p->geom_ctrl);
- if(p->geom_offsets)
- free(p->geom_offsets);
- if(p->color_ctrl)
- {
- free(p->color_ctrl);
- if(p->color_offsets)
- free(p->color_offsets);
- }
- if(p->normal_ctrl)
- {
- free(p->normal_ctrl);
- if(p->normal_offsets)
- free(p->normal_offsets);
- }
- if(p->texture_ctrl)
- {
- free(p->texture_ctrl);
- if(p->texture_offsets)
- free(p->texture_offsets);
- }
+ if (p->geom_ctrl)
+ free(p->geom_ctrl);
+ if (p->geom_offsets)
+ free(p->geom_offsets);
+ if (p->color_ctrl) {
+ free(p->color_ctrl);
+ if (p->color_offsets)
+ free(p->color_offsets);
+ }
+ if (p->normal_ctrl) {
+ free(p->normal_ctrl);
+ if (p->normal_offsets)
+ free(p->normal_offsets);
+ }
+ if (p->texture_ctrl) {
+ free(p->texture_ctrl);
+ if (p->texture_offsets)
+ free(p->texture_offsets);
+ }
}
/* convert surfaces - geometry and possible attribute ones into equivalent */
/* sequence of adjacent Bezier patches */
static GLenum
-convert_surfs(GLUnurbsObj *nobj, new_ctrl_type *new_ctrl)
+convert_surfs(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl)
{
- knot_str_type geom_s_knot,color_s_knot,normal_s_knot,texture_s_knot;
- knot_str_type geom_t_knot,color_t_knot,normal_t_knot,texture_t_knot;
- GLenum err;
+ knot_str_type geom_s_knot, color_s_knot, normal_s_knot, texture_s_knot;
+ knot_str_type geom_t_knot, color_t_knot, normal_t_knot, texture_t_knot;
+ GLenum err;
- if((err=fill_knot_structures(nobj,&geom_s_knot,&geom_t_knot,
- &color_s_knot,&color_t_knot,&normal_s_knot,&normal_t_knot,
- &texture_s_knot,&texture_t_knot)) !=GLU_NO_ERROR)
- {
- return err;
- }
- /* unify knots - all knots should have the same working range */
- if((err=select_knot_working_range(nobj,&geom_s_knot,&color_s_knot,
- &normal_s_knot,&texture_s_knot)) !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return err;
- }
- if((err=select_knot_working_range(nobj,&geom_t_knot,&color_t_knot,
- &normal_t_knot,&texture_t_knot)) !=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_s_knot,&color_s_knot,&normal_s_knot,
- &texture_s_knot);
- call_user_error(nobj,err);
- return err;
- }
+ if ((err = fill_knot_structures(nobj, &geom_s_knot, &geom_t_knot,
+ &color_s_knot, &color_t_knot,
+ &normal_s_knot, &normal_t_knot,
+ &texture_s_knot,
+ &texture_t_knot)) != GLU_NO_ERROR) {
+ return err;
+ }
+ /* unify knots - all knots should have the same working range */
+ if ((err = select_knot_working_range(nobj, &geom_s_knot, &color_s_knot,
+ &normal_s_knot,
+ &texture_s_knot)) != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return err;
+ }
+ if ((err = select_knot_working_range(nobj, &geom_t_knot, &color_t_knot,
+ &normal_t_knot,
+ &texture_t_knot)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_s_knot, &color_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ call_user_error(nobj, err);
+ return err;
+ }
- /* convert the geometry surface */
- nobj->surface.geom.dim=get_surface_dim(nobj->surface.geom.type);
- if((err=convert_surf(&geom_s_knot,&geom_t_knot,&(nobj->surface.geom),
- &(new_ctrl->geom_ctrl),&(new_ctrl->geom_s_pt_cnt),
- &(new_ctrl->geom_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_s_knot,&color_s_knot,&normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&geom_t_knot,&color_t_knot,&normal_t_knot,
- &texture_t_knot);
- call_user_error(nobj,err);
- return err;
- }
- /* if additional attributive surfaces are given convert them as well */
- if(color_s_knot.unified_knot)
- {
- nobj->surface.color.dim=get_surface_dim(nobj->surface.color.type);
- if((err=convert_surf(&color_s_knot,&color_t_knot,&(nobj->surface.color),
- &(new_ctrl->color_ctrl),&(new_ctrl->color_s_pt_cnt),
- &(new_ctrl->color_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&color_s_knot,&color_s_knot,&normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&color_t_knot,&color_t_knot,&normal_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(normal_s_knot.unified_knot)
- {
- nobj->surface.normal.dim=get_surface_dim(nobj->surface.normal.type);
- if((err=convert_surf(&normal_s_knot,&normal_t_knot,
- &(nobj->surface.normal),
- &(new_ctrl->normal_ctrl),&(new_ctrl->normal_s_pt_cnt),
- &(new_ctrl->normal_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&normal_s_knot,&normal_s_knot,&normal_s_knot,
- &texture_s_knot);
- free_unified_knots(&normal_t_knot,&normal_t_knot,&normal_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(texture_s_knot.unified_knot)
- {
- nobj->surface.texture.dim=get_surface_dim(nobj->surface.texture.type);
- if((err=convert_surf(&texture_s_knot,&texture_t_knot,
- &(nobj->surface.texture),
- &(new_ctrl->texture_ctrl),&(new_ctrl->texture_s_pt_cnt),
- &(new_ctrl->texture_t_pt_cnt)))!=GLU_NO_ERROR)
- {
- free_unified_knots(&texture_s_knot,&texture_s_knot,&texture_s_knot,
- &texture_s_knot);
- free_unified_knots(&texture_t_knot,&texture_t_knot,&texture_t_knot,
- &texture_t_knot);
- free_new_ctrl(new_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- return GLU_NO_ERROR;
+ /* convert the geometry surface */
+ nobj->surface.geom.dim = get_surface_dim(nobj->surface.geom.type);
+ if ((err = convert_surf(&geom_s_knot, &geom_t_knot, &(nobj->surface.geom),
+ &(new_ctrl->geom_ctrl), &(new_ctrl->geom_s_pt_cnt),
+ &(new_ctrl->geom_t_pt_cnt))) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_s_knot, &color_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&geom_t_knot, &color_t_knot, &normal_t_knot,
+ &texture_t_knot);
+ call_user_error(nobj, err);
+ return err;
+ }
+ /* if additional attributive surfaces are given convert them as well */
+ if (color_s_knot.unified_knot) {
+ nobj->surface.color.dim = get_surface_dim(nobj->surface.color.type);
+ if (
+ (err =
+ convert_surf(&color_s_knot, &color_t_knot, &(nobj->surface.color),
+ &(new_ctrl->color_ctrl), &(new_ctrl->color_s_pt_cnt),
+ &(new_ctrl->color_t_pt_cnt))) != GLU_NO_ERROR) {
+ free_unified_knots(&color_s_knot, &color_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&color_t_knot, &color_t_knot, &normal_t_knot,
+ &texture_t_knot);
+ free_new_ctrl(new_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (normal_s_knot.unified_knot) {
+ nobj->surface.normal.dim = get_surface_dim(nobj->surface.normal.type);
+ if ((err = convert_surf(&normal_s_knot, &normal_t_knot,
+ &(nobj->surface.normal),
+ &(new_ctrl->normal_ctrl),
+ &(new_ctrl->normal_s_pt_cnt),
+ &(new_ctrl->normal_t_pt_cnt))) !=
+ GLU_NO_ERROR) {
+ free_unified_knots(&normal_s_knot, &normal_s_knot, &normal_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&normal_t_knot, &normal_t_knot, &normal_t_knot,
+ &texture_t_knot);
+ free_new_ctrl(new_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (texture_s_knot.unified_knot) {
+ nobj->surface.texture.dim = get_surface_dim(nobj->surface.texture.type);
+ if ((err = convert_surf(&texture_s_knot, &texture_t_knot,
+ &(nobj->surface.texture),
+ &(new_ctrl->texture_ctrl),
+ &(new_ctrl->texture_s_pt_cnt),
+ &(new_ctrl->texture_t_pt_cnt))) !=
+ GLU_NO_ERROR) {
+ free_unified_knots(&texture_s_knot, &texture_s_knot, &texture_s_knot,
+ &texture_s_knot);
+ free_unified_knots(&texture_t_knot, &texture_t_knot, &texture_t_knot,
+ &texture_t_knot);
+ free_new_ctrl(new_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ return GLU_NO_ERROR;
}
/* tesselate the "boundary" Bezier edge strips */
-void
-tesselate_strip_t_line(GLint top_start,GLint top_end,GLint top_z,
- GLint bottom_start,GLint bottom_end,GLint bottom_z,GLint bottom_domain)
+static void
+tesselate_strip_t_line(GLint top_start, GLint top_end, GLint top_z,
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLint bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- glBegin(GL_LINES);
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- {
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- glEvalPoint2(top_z,top_start);
- }
- if(bottom_cnt)
- {
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- glEvalPoint2(top_z,top_start);
- }
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
- glEnd();
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ glBegin(GL_LINES);
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction) {
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ glEvalPoint2(top_z, top_start);
+ }
+ if (bottom_cnt) {
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ glEvalPoint2(top_z, top_start);
+ }
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
+ glEnd();
}
-void
-tesselate_strip_t_fill(GLint top_start,GLint top_end,GLint top_z,
- GLint bottom_start,GLint bottom_end,GLint bottom_z,GLint bottom_domain)
+
+static void
+tesselate_strip_t_fill(GLint top_start, GLint top_end, GLint top_z,
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLint bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- glBegin(GL_TRIANGLE_FAN);
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- glEvalPoint2(top_z,top_start);
- if(bottom_cnt)
- {
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_z/bottom_domain,
- (GLfloat)bottom_start/bottom_domain);
- }
- glEnd();
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction)
+ glEvalPoint2(top_z, top_start);
+ if (bottom_cnt) {
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_z / bottom_domain,
+ (GLfloat) bottom_start / bottom_domain);
+ }
+ glEnd();
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
}
-void
-tesselate_strip_t(GLenum display_mode, GLint top_start, GLint top_end,
- GLint top_z, GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLint bottom_domain)
+
+static void
+tesselate_strip_t(GLenum display_mode, GLint top_start, GLint top_end,
+ GLint top_z, GLint bottom_start, GLint bottom_end,
+ GLint bottom_z, GLint bottom_domain)
{
- if(display_mode==GL_FILL)
- tesselate_strip_t_fill(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
- else
- tesselate_strip_t_line(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
+ if (display_mode == GL_FILL)
+ tesselate_strip_t_fill(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
+ else
+ tesselate_strip_t_line(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
}
-
-void
+
+static void
tesselate_strip_s_fill(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z, GLfloat bottom_domain)
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLfloat bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- glBegin(GL_TRIANGLE_FAN);
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- glEvalPoint2(top_start,top_z);
- if(bottom_cnt)
- {
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- }
- glEnd();
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction)
+ glEvalPoint2(top_start, top_z);
+ if (bottom_cnt) {
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ }
+ glEnd();
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
}
-void
+
+static void
tesselate_strip_s_line(GLint top_start, GLint top_end, GLint top_z,
- GLint bottom_start, GLint bottom_end, GLint bottom_z, GLfloat bottom_domain)
+ GLint bottom_start, GLint bottom_end, GLint bottom_z,
+ GLfloat bottom_domain)
{
- GLint top_cnt,bottom_cnt,tri_cnt,k;
- GLint direction;
+ GLint top_cnt, bottom_cnt, tri_cnt, k;
+ GLint direction;
- top_cnt=top_end-top_start;
- direction= (top_cnt>=0 ? 1: -1);
- bottom_cnt=bottom_end-bottom_start;
- glBegin(GL_LINES);
- while(top_cnt)
- {
- if(bottom_cnt)
- tri_cnt=top_cnt/bottom_cnt;
- else
- tri_cnt=abs(top_cnt);
- for(k=0;k<=tri_cnt;k++ , top_start+=direction)
- {
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- glEvalPoint2(top_start,top_z);
- }
- if(bottom_cnt)
- {
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- bottom_start+=direction;
- top_start-=direction;
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- glEvalPoint2(top_start,top_z);
- glEvalCoord2f((GLfloat)bottom_start/bottom_domain,
- (GLfloat)bottom_z/bottom_domain);
- }
- top_cnt-=direction*tri_cnt;
- bottom_cnt-=direction;
- }
- glEnd();
+ top_cnt = top_end - top_start;
+ direction = (top_cnt >= 0 ? 1 : -1);
+ bottom_cnt = bottom_end - bottom_start;
+ glBegin(GL_LINES);
+ while (top_cnt) {
+ if (bottom_cnt)
+ tri_cnt = top_cnt / bottom_cnt;
+ else
+ tri_cnt = abs(top_cnt);
+ for (k = 0; k <= tri_cnt; k++, top_start += direction) {
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ glEvalPoint2(top_start, top_z);
+ }
+ if (bottom_cnt) {
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ bottom_start += direction;
+ top_start -= direction;
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ glEvalPoint2(top_start, top_z);
+ glEvalCoord2f((GLfloat) bottom_start / bottom_domain,
+ (GLfloat) bottom_z / bottom_domain);
+ }
+ top_cnt -= direction * tri_cnt;
+ bottom_cnt -= direction;
+ }
+ glEnd();
}
-void
+
+static void
tesselate_strip_s(GLenum display_mode, GLint top_start, GLint top_end,
- GLint top_z, GLint bottom_start, GLint bottom_end, GLint bottom_z,
- GLfloat bottom_domain)
+ GLint top_z, GLint bottom_start, GLint bottom_end,
+ GLint bottom_z, GLfloat bottom_domain)
{
- if(display_mode==GL_FILL)
- tesselate_strip_s_fill(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
- else
- tesselate_strip_s_line(top_start,top_end,top_z,bottom_start,
- bottom_end,bottom_z,bottom_domain);
+ if (display_mode == GL_FILL)
+ tesselate_strip_s_fill(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
+ else
+ tesselate_strip_s_line(top_start, top_end, top_z, bottom_start,
+ bottom_end, bottom_z, bottom_domain);
}
-void
+static void
tesselate_bottom_left_corner(GLenum display_mode, GLfloat s_1, GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(1,1);
- glEvalCoord2f(s_1,0.0);
- glEvalCoord2f(0.0,0.0);
- glEvalCoord2f(0.0,t_1);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f(0.0,0.0);
- glEvalCoord2f(0.0,t_1);
- glEvalCoord2f(0.0,0.0);
- glEvalPoint2(1,1);
- glEvalCoord2f(0.0,0.0);
- glEvalCoord2f(s_1,0.0);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(1, 1);
+ glEvalCoord2f(s_1, 0.0);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalCoord2f(0.0, t_1);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalCoord2f(0.0, t_1);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalPoint2(1, 1);
+ glEvalCoord2f(0.0, 0.0);
+ glEvalCoord2f(s_1, 0.0);
+ }
+ glEnd();
}
-void
-tesselate_bottom_right_corner(GLenum display_mode, GLint v_top,GLint v_bottom,
- GLfloat s_1, GLfloat t_1)
+static void
+tesselate_bottom_right_corner(GLenum display_mode, GLint v_top,
+ GLint v_bottom, GLfloat s_1, GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(1,v_top);
- glEvalCoord2f(0.0,v_bottom*t_1);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalCoord2f(s_1,(v_bottom+1)*t_1);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalPoint2(1,v_top);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalCoord2f(0.0,v_bottom*t_1);
- glEvalCoord2f(0.0,(v_bottom+1)*t_1);
- glEvalCoord2f(s_1,(v_bottom+1)*t_1);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(1, v_top);
+ glEvalCoord2f(0.0, v_bottom * t_1);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalCoord2f(s_1, (v_bottom + 1) * t_1);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalPoint2(1, v_top);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalCoord2f(0.0, v_bottom * t_1);
+ glEvalCoord2f(0.0, (v_bottom + 1) * t_1);
+ glEvalCoord2f(s_1, (v_bottom + 1) * t_1);
+ }
+ glEnd();
}
-void
+static void
tesselate_top_left_corner(GLenum display_mode, GLint u_right, GLint u_left,
- GLfloat s_1, GLfloat t_1)
+ GLfloat s_1, GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(u_right,1);
- glEvalCoord2f((u_left+1)*s_1,t_1);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalCoord2f(u_left*s_1,0.0);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalPoint2(u_right,1);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalCoord2f(u_left*s_1,0.0);
- glEvalCoord2f((u_left+1)*s_1,0.0);
- glEvalCoord2f((u_left+1)*s_1,t_1);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(u_right, 1);
+ glEvalCoord2f((u_left + 1) * s_1, t_1);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalCoord2f(u_left * s_1, 0.0);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalPoint2(u_right, 1);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalCoord2f(u_left * s_1, 0.0);
+ glEvalCoord2f((u_left + 1) * s_1, 0.0);
+ glEvalCoord2f((u_left + 1) * s_1, t_1);
+ }
+ glEnd();
}
-void
+static void
tesselate_top_right_corner(GLenum display_mode, GLint u_left, GLint v_bottom,
- GLint u_right, GLint v_top, GLfloat s_1, GLfloat t_1)
+ GLint u_right, GLint v_top, GLfloat s_1,
+ GLfloat t_1)
{
- if(display_mode==GL_FILL)
- {
- glBegin(GL_TRIANGLE_FAN);
- glEvalPoint2(u_left,v_bottom);
- glEvalCoord2f((u_right-1)*s_1,v_top*t_1);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalCoord2f(u_right*s_1,(v_top-1)*t_1);
- }
- else
- {
- glBegin(GL_LINES);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalPoint2(u_left,v_bottom);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalCoord2f(u_right*s_1,(v_top-1)*t_1);
- glEvalCoord2f(u_right*s_1,v_top*t_1);
- glEvalCoord2f((u_right-1)*s_1,v_top*t_1);
- }
- glEnd();
+ if (display_mode == GL_FILL) {
+ glBegin(GL_TRIANGLE_FAN);
+ glEvalPoint2(u_left, v_bottom);
+ glEvalCoord2f((u_right - 1) * s_1, v_top * t_1);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalCoord2f(u_right * s_1, (v_top - 1) * t_1);
+ }
+ else {
+ glBegin(GL_LINES);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalPoint2(u_left, v_bottom);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalCoord2f(u_right * s_1, (v_top - 1) * t_1);
+ glEvalCoord2f(u_right * s_1, v_top * t_1);
+ glEvalCoord2f((u_right - 1) * s_1, v_top * t_1);
+ }
+ glEnd();
}
/* do mesh mapping of Bezier */
static void
-nurbs_map_bezier(GLenum display_mode,GLint *sfactors,GLint *tfactors,
- GLint s_bezier_cnt, GLint t_bezier_cnt, GLint s, GLint t)
+nurbs_map_bezier(GLenum display_mode, GLint * sfactors, GLint * tfactors,
+ GLint s_bezier_cnt, GLint t_bezier_cnt, GLint s, GLint t)
{
- GLint top,bottom,right,left;
+ GLint top, bottom, right, left;
- if(s==0)
- {
- top=*(tfactors+t*3);
- bottom=*(tfactors+t*3+1);
- }
- else
- if(s==s_bezier_cnt-1)
- {
- top=*(tfactors+t*3+2);
- bottom=*(tfactors+t*3);
- }
- else
- {
- top=bottom=*(tfactors+t*3);
- }
- if(t==0)
- {
- left=*(sfactors+s*3+1);
- right=*(sfactors+s*3);
- }
- else
- if(t==t_bezier_cnt-1)
- {
- left=*(sfactors+s*3);
- right=*(sfactors+s*3+2);
- }
- else
- {
- left=right=*(sfactors+s*3);
- }
+ if (s == 0) {
+ top = *(tfactors + t * 3);
+ bottom = *(tfactors + t * 3 + 1);
+ }
+ else if (s == s_bezier_cnt - 1) {
+ top = *(tfactors + t * 3 + 2);
+ bottom = *(tfactors + t * 3);
+ }
+ else {
+ top = bottom = *(tfactors + t * 3);
+ }
+ if (t == 0) {
+ left = *(sfactors + s * 3 + 1);
+ right = *(sfactors + s * 3);
+ }
+ else if (t == t_bezier_cnt - 1) {
+ left = *(sfactors + s * 3);
+ right = *(sfactors + s * 3 + 2);
+ }
+ else {
+ left = right = *(sfactors + s * 3);
+ }
- if(top>bottom)
- {
- if(left<right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,1,right, 1, top);
- tesselate_strip_s(display_mode,1,right,1,1,left,0,(GLfloat)left);
- tesselate_bottom_left_corner(display_mode,(GLfloat)(1.0/left),
- (GLfloat)(1.0/bottom));
+ if (top > bottom) {
+ if (left < right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 1, right, 1, top);
+ tesselate_strip_s(display_mode, 1, right, 1, 1, left, 0,
+ (GLfloat) left);
+ tesselate_bottom_left_corner(display_mode, (GLfloat) (1.0 / left),
+ (GLfloat) (1.0 / bottom));
/* tesselate_strip_t(display_mode,1,top,1,1,bottom,0,(GLfloat)bottom);*/
- tesselate_strip_t(display_mode,top,1,1,bottom,1,0,(GLfloat)bottom);
- }
- else
- if(left==right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,1,right, 0, top);
+ tesselate_strip_t(display_mode, top, 1, 1, bottom, 1, 0,
+ (GLfloat) bottom);
+ }
+ else if (left == right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 1, right, 0, top);
/* tesselate_strip_t(display_mode,0,top,1,0,bottom,0,(GLfloat)bottom);*/
- tesselate_strip_t(display_mode,top,0,1,bottom,0,0,(GLfloat)bottom);
- }
- else
- {
- glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,1,left, 0, top-1);
+ tesselate_strip_t(display_mode, top, 0, 1, bottom, 0, 0,
+ (GLfloat) bottom);
+ }
+ else {
+ glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 1, left, 0, top - 1);
/* tesselate_strip_t(display_mode,0,top-1,1,0,bottom-1,0,
(GLfloat)bottom);*/
- tesselate_strip_t(display_mode,top-1,0,1,bottom-1,0,0,
- (GLfloat)bottom);
- tesselate_bottom_right_corner(display_mode,top-1,bottom-1,
- (GLfloat)(1.0/right),(GLfloat)(1.0/bottom));
+ tesselate_strip_t(display_mode, top - 1, 0, 1, bottom - 1, 0, 0,
+ (GLfloat) bottom);
+ tesselate_bottom_right_corner(display_mode, top - 1, bottom - 1,
+ (GLfloat) (1.0 / right),
+ (GLfloat) (1.0 / bottom));
/* tesselate_strip_s(display_mode,1,left,top-1,1,right,right,
(GLfloat)right);*/
- tesselate_strip_s(display_mode,left,1,top-1,right,1,right,
- (GLfloat)right);
- }
- }
- else
- if(top==bottom)
- {
- if(left<right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right, 1, top);
- tesselate_strip_s(display_mode,0,right,1,0,left,0,(GLfloat)left);
- }
- else
- if(left==right)
- {
- glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right, 0, top);
- }
- else
- {
- glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
- glEvalMesh2(display_mode,0,left, 0, top-1);
+ tesselate_strip_s(display_mode, left, 1, top - 1, right, 1, right,
+ (GLfloat) right);
+ }
+ }
+ else if (top == bottom) {
+ if (left < right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right, 1, top);
+ tesselate_strip_s(display_mode, 0, right, 1, 0, left, 0,
+ (GLfloat) left);
+ }
+ else if (left == right) {
+ glMapGrid2f(right, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right, 0, top);
+ }
+ else {
+ glMapGrid2f(left, 0.0, 1.0, top, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, left, 0, top - 1);
/* tesselate_strip_s(display_mode,0,left,top-1,0,right,right,
(GLfloat)right);*/
- tesselate_strip_s(display_mode,left,0,top-1,right,0,right,
- (GLfloat)right);
- }
- }
- else
- {
- if(left<right)
- {
- glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right-1, 1, bottom);
- tesselate_strip_s(display_mode,0,right-1,1,0,left-1,0,
- (GLfloat)left);
- tesselate_top_left_corner(display_mode,right-1,left-1,
- (GLfloat)(1.0/left),(GLfloat)(1.0/top));
- tesselate_strip_t(display_mode,1,bottom,right-1,1,top,top,
- (GLfloat)top);
- }
- else
- if(left==right)
- {
- glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode,0,right-1, 0, bottom);
- tesselate_strip_t(display_mode,0,bottom,right-1,0,top,top,
- (GLfloat)top);
- }
- else
- {
- glMapGrid2f(left, 0.0, 1.0, bottom, 0.0, 1.0);
- glEvalMesh2(display_mode,0,left-1, 0, bottom-1);
- tesselate_strip_t(display_mode,0,bottom-1,left-1,0,top-1,top,
- (GLfloat)top);
- tesselate_top_right_corner(display_mode,left-1,bottom-1,right,top,
- (GLfloat)(1.0/right),(GLfloat)(1.0/top));
+ tesselate_strip_s(display_mode, left, 0, top - 1, right, 0, right,
+ (GLfloat) right);
+ }
+ }
+ else {
+ if (left < right) {
+ glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right - 1, 1, bottom);
+ tesselate_strip_s(display_mode, 0, right - 1, 1, 0, left - 1, 0,
+ (GLfloat) left);
+ tesselate_top_left_corner(display_mode, right - 1, left - 1,
+ (GLfloat) (1.0 / left),
+ (GLfloat) (1.0 / top));
+ tesselate_strip_t(display_mode, 1, bottom, right - 1, 1, top, top,
+ (GLfloat) top);
+ }
+ else if (left == right) {
+ glMapGrid2f(right, 0.0, 1.0, bottom, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, right - 1, 0, bottom);
+ tesselate_strip_t(display_mode, 0, bottom, right - 1, 0, top, top,
+ (GLfloat) top);
+ }
+ else {
+ glMapGrid2f(left, 0.0, 1.0, bottom, 0.0, 1.0);
+ glEvalMesh2(display_mode, 0, left - 1, 0, bottom - 1);
+ tesselate_strip_t(display_mode, 0, bottom - 1, left - 1, 0, top - 1,
+ top, (GLfloat) top);
+ tesselate_top_right_corner(display_mode, left - 1, bottom - 1, right,
+ top, (GLfloat) (1.0 / right),
+ (GLfloat) (1.0 / top));
/* tesselate_strip_s(display_mode,0,left-1,bottom-1,0,right-1,right,
(GLfloat)right);*/
- tesselate_strip_s(display_mode,left-1,0,bottom-1,right-1,0,right,
- (GLfloat)right);
- }
- }
+ tesselate_strip_s(display_mode, left - 1, 0, bottom - 1, right - 1,
+ 0, right, (GLfloat) right);
+ }
+ }
}
/* draw NURBS surface in OUTLINE POLYGON mode */
static void
-draw_polygon_mode( GLenum display_mode, GLUnurbsObj *nobj,
- new_ctrl_type *new_ctrl, GLint *sfactors, GLint *tfactors )
+draw_polygon_mode(GLenum display_mode, GLUnurbsObj * nobj,
+ new_ctrl_type * new_ctrl, GLint * sfactors,
+ GLint * tfactors)
{
- GLsizei offset;
- GLint t_bezier_cnt,s_bezier_cnt;
- GLboolean do_color,do_normal,do_texture;
- GLint i,j;
+ GLsizei offset;
+ GLint t_bezier_cnt, s_bezier_cnt;
+ GLboolean do_color, do_normal, do_texture;
+ GLint i, j;
- t_bezier_cnt=new_ctrl->t_bezier_cnt;
- s_bezier_cnt=new_ctrl->s_bezier_cnt;
- glEnable(nobj->surface.geom.type);
- if(new_ctrl->color_ctrl)
- {
- glEnable(nobj->surface.color.type);
- do_color=GL_TRUE;
- }
- else
- do_color=GL_FALSE;
- if(new_ctrl->normal_ctrl)
- {
- glEnable(nobj->surface.normal.type);
- do_normal=GL_TRUE;
- }
- else
- do_normal=GL_FALSE;
- if(new_ctrl->texture_ctrl)
- {
- glEnable(nobj->surface.texture.type);
- do_texture=GL_TRUE;
- }
- else
- do_texture=GL_FALSE;
- for(j=0; j<s_bezier_cnt; j++)
- {
- for(i=0; i<t_bezier_cnt; i++)
- {
- offset=j*t_bezier_cnt + i;
- if(fine_culling_test_3D(nobj,*(new_ctrl->geom_offsets + offset),
- nobj->surface.geom.sorder,nobj->surface.geom.torder,
- new_ctrl->geom_s_stride,new_ctrl->geom_t_stride,
- nobj->surface.geom.dim))
- continue;
- glMap2f(nobj->surface.geom.type,0.0,1.0,new_ctrl->geom_s_stride,
- nobj->surface.geom.sorder,0.0,1.0,new_ctrl->geom_t_stride,
- nobj->surface.geom.torder,*(new_ctrl->geom_offsets + offset));
- if(do_color)
- {
- glMap2f(nobj->surface.color.type,0.0,1.0,
- new_ctrl->color_s_stride,nobj->surface.color.sorder,
- 0.0,1.0,new_ctrl->color_t_stride,nobj->surface.color.torder,
- *(new_ctrl->color_offsets + offset));
- }
- if(do_normal)
- {
- glMap2f(nobj->surface.normal.type,0.0,1.0,
- new_ctrl->normal_s_stride,nobj->surface.normal.sorder,
- 0.0,1.0,new_ctrl->normal_t_stride,
- nobj->surface.normal.torder,
- *(new_ctrl->normal_offsets+offset));
- }
- if(do_texture)
- {
- glMap2f(nobj->surface.texture.type,0.0,1.0,
- new_ctrl->texture_s_stride,nobj->surface.texture.sorder,
- 0.0,1.0,new_ctrl->texture_t_stride,
- nobj->surface.texture.torder,
- *(new_ctrl->texture_offsets+offset));
- }
+ t_bezier_cnt = new_ctrl->t_bezier_cnt;
+ s_bezier_cnt = new_ctrl->s_bezier_cnt;
+ glEnable(nobj->surface.geom.type);
+ if (new_ctrl->color_ctrl) {
+ glEnable(nobj->surface.color.type);
+ do_color = GL_TRUE;
+ }
+ else
+ do_color = GL_FALSE;
+ if (new_ctrl->normal_ctrl) {
+ glEnable(nobj->surface.normal.type);
+ do_normal = GL_TRUE;
+ }
+ else
+ do_normal = GL_FALSE;
+ if (new_ctrl->texture_ctrl) {
+ glEnable(nobj->surface.texture.type);
+ do_texture = GL_TRUE;
+ }
+ else
+ do_texture = GL_FALSE;
+ for (j = 0; j < s_bezier_cnt; j++) {
+ for (i = 0; i < t_bezier_cnt; i++) {
+ offset = j * t_bezier_cnt + i;
+ if (fine_culling_test_3D(nobj, *(new_ctrl->geom_offsets + offset),
+ nobj->surface.geom.sorder,
+ nobj->surface.geom.torder,
+ new_ctrl->geom_s_stride,
+ new_ctrl->geom_t_stride,
+ nobj->surface.geom.dim)) continue;
+ glMap2f(nobj->surface.geom.type, 0.0, 1.0, new_ctrl->geom_s_stride,
+ nobj->surface.geom.sorder, 0.0, 1.0, new_ctrl->geom_t_stride,
+ nobj->surface.geom.torder,
+ *(new_ctrl->geom_offsets + offset));
+ if (do_color) {
+ glMap2f(nobj->surface.color.type, 0.0, 1.0,
+ new_ctrl->color_s_stride, nobj->surface.color.sorder,
+ 0.0, 1.0, new_ctrl->color_t_stride,
+ nobj->surface.color.torder,
+ *(new_ctrl->color_offsets + offset));
+ }
+ if (do_normal) {
+ glMap2f(nobj->surface.normal.type, 0.0, 1.0,
+ new_ctrl->normal_s_stride, nobj->surface.normal.sorder,
+ 0.0, 1.0, new_ctrl->normal_t_stride,
+ nobj->surface.normal.torder,
+ *(new_ctrl->normal_offsets + offset));
+ }
+ if (do_texture) {
+ glMap2f(nobj->surface.texture.type, 0.0, 1.0,
+ new_ctrl->texture_s_stride, nobj->surface.texture.sorder,
+ 0.0, 1.0, new_ctrl->texture_t_stride,
+ nobj->surface.texture.torder,
+ *(new_ctrl->texture_offsets + offset));
+ }
/* glMapGrid2f(sfactors[j*3+0],0.0,1.0,tfactors[i*3+0],0.0,1.0);
glEvalMesh2(display_mode,0,sfactors[j*3+0],0,tfactors[i*3+0]);*/
- nurbs_map_bezier(display_mode,sfactors,tfactors,s_bezier_cnt,
- t_bezier_cnt,j,i);
- }
- }
+ nurbs_map_bezier(display_mode, sfactors, tfactors, s_bezier_cnt,
+ t_bezier_cnt, j, i);
+ }
+ }
}
/* draw NURBS surface in OUTLINE POLYGON mode */
#if 0
static void
-draw_patch_mode( GLenum display_mode, GLUnurbsObj *nobj,
- new_ctrl_type *new_ctrl, GLint *sfactors, GLint *tfactors )
+draw_patch_mode(GLenum display_mode, GLUnurbsObj * nobj,
+ new_ctrl_type * new_ctrl, GLint * sfactors, GLint * tfactors)
{
- GLsizei offset;
- GLint t_bezier_cnt,s_bezier_cnt;
- GLboolean do_color,do_normal,do_texture;
- GLint i,j;
+ GLsizei offset;
+ GLint t_bezier_cnt, s_bezier_cnt;
+ GLboolean do_color, do_normal, do_texture;
+ GLint i, j;
- t_bezier_cnt=new_ctrl->t_bezier_cnt;
- s_bezier_cnt=new_ctrl->s_bezier_cnt;
- glEnable(nobj->surface.geom.type);
- if(new_ctrl->color_ctrl)
- {
- glEnable(nobj->surface.color.type);
- do_color=GL_TRUE;
- }
- else
- do_color=GL_FALSE;
- if(new_ctrl->normal_ctrl)
- {
- glEnable(nobj->surface.normal.type);
- do_normal=GL_TRUE;
- }
- else
- do_normal=GL_FALSE;
- if(new_ctrl->texture_ctrl)
- {
- glEnable(nobj->surface.texture.type);
- do_texture=GL_TRUE;
- }
- else
- do_texture=GL_FALSE;
- for(j=0; j<s_bezier_cnt; j++)
- {
- for(i=0; i<t_bezier_cnt; i++)
- {
- offset=j*t_bezier_cnt + i;
- if(fine_culling_test_3D(nobj,*(new_ctrl->geom_offsets + offset),
- nobj->surface.geom.sorder,nobj->surface.geom.torder,
- new_ctrl->geom_s_stride,new_ctrl->geom_t_stride,
- nobj->surface.geom.dim))
- continue;
- glMap2f(nobj->surface.geom.type,0.0,1.0,new_ctrl->geom_s_stride,
- nobj->surface.geom.sorder,0.0,1.0,new_ctrl->geom_t_stride,
- nobj->surface.geom.torder,*(new_ctrl->geom_offsets + offset));
- if(do_color)
- {
- glMap2f(nobj->surface.color.type,0.0,1.0,
- new_ctrl->color_s_stride,nobj->surface.color.sorder,
- 0.0,1.0,new_ctrl->color_t_stride,nobj->surface.color.torder,
- *(new_ctrl->color_offsets + offset));
- }
- if(do_normal)
- {
- glMap2f(nobj->surface.normal.type,0.0,1.0,
- new_ctrl->normal_s_stride,nobj->surface.normal.sorder,
- 0.0,1.0,new_ctrl->normal_t_stride,
- nobj->surface.normal.torder,
- *(new_ctrl->normal_offsets+offset));
- }
- if(do_texture)
- {
- glMap2f(nobj->surface.texture.type,0.0,1.0,
- new_ctrl->texture_s_stride,nobj->surface.texture.sorder,
- 0.0,1.0,new_ctrl->texture_t_stride,
- nobj->surface.texture.torder,
- *(new_ctrl->texture_offsets+offset));
- }
- nurbs_map_bezier(display_mode,sfactors,tfactors,s_bezier_cnt,
- t_bezier_cnt,i,j);
+ t_bezier_cnt = new_ctrl->t_bezier_cnt;
+ s_bezier_cnt = new_ctrl->s_bezier_cnt;
+ glEnable(nobj->surface.geom.type);
+ if (new_ctrl->color_ctrl) {
+ glEnable(nobj->surface.color.type);
+ do_color = GL_TRUE;
+ }
+ else
+ do_color = GL_FALSE;
+ if (new_ctrl->normal_ctrl) {
+ glEnable(nobj->surface.normal.type);
+ do_normal = GL_TRUE;
+ }
+ else
+ do_normal = GL_FALSE;
+ if (new_ctrl->texture_ctrl) {
+ glEnable(nobj->surface.texture.type);
+ do_texture = GL_TRUE;
+ }
+ else
+ do_texture = GL_FALSE;
+ for (j = 0; j < s_bezier_cnt; j++) {
+ for (i = 0; i < t_bezier_cnt; i++) {
+ offset = j * t_bezier_cnt + i;
+ if (fine_culling_test_3D(nobj, *(new_ctrl->geom_offsets + offset),
+ nobj->surface.geom.sorder,
+ nobj->surface.geom.torder,
+ new_ctrl->geom_s_stride,
+ new_ctrl->geom_t_stride,
+ nobj->surface.geom.dim)) continue;
+ glMap2f(nobj->surface.geom.type, 0.0, 1.0, new_ctrl->geom_s_stride,
+ nobj->surface.geom.sorder, 0.0, 1.0, new_ctrl->geom_t_stride,
+ nobj->surface.geom.torder,
+ *(new_ctrl->geom_offsets + offset));
+ if (do_color) {
+ glMap2f(nobj->surface.color.type, 0.0, 1.0,
+ new_ctrl->color_s_stride, nobj->surface.color.sorder,
+ 0.0, 1.0, new_ctrl->color_t_stride,
+ nobj->surface.color.torder,
+ *(new_ctrl->color_offsets + offset));
+ }
+ if (do_normal) {
+ glMap2f(nobj->surface.normal.type, 0.0, 1.0,
+ new_ctrl->normal_s_stride, nobj->surface.normal.sorder,
+ 0.0, 1.0, new_ctrl->normal_t_stride,
+ nobj->surface.normal.torder,
+ *(new_ctrl->normal_offsets + offset));
+ }
+ if (do_texture) {
+ glMap2f(nobj->surface.texture.type, 0.0, 1.0,
+ new_ctrl->texture_s_stride, nobj->surface.texture.sorder,
+ 0.0, 1.0, new_ctrl->texture_t_stride,
+ nobj->surface.texture.torder,
+ *(new_ctrl->texture_offsets + offset));
+ }
+ nurbs_map_bezier(display_mode, sfactors, tfactors, s_bezier_cnt,
+ t_bezier_cnt, i, j);
/* glMapGrid2f(sfactors[j],0.0,1.0,tfactors[i],0.0,1.0);
glEvalMesh2(display_mode,0,sfactors[j],0,tfactors[i]);*/
- }
- }
+ }
+ }
}
#endif
-void
-init_new_ctrl(new_ctrl_type *p)
+static void
+init_new_ctrl(new_ctrl_type * p)
{
- p->geom_ctrl=p->color_ctrl=p->normal_ctrl=p->texture_ctrl=NULL;
- p->geom_offsets=p->color_offsets=p->normal_offsets=p->texture_offsets=NULL;
- p->s_bezier_cnt=p->t_bezier_cnt=0;
+ p->geom_ctrl = p->color_ctrl = p->normal_ctrl = p->texture_ctrl = NULL;
+ p->geom_offsets = p->color_offsets = p->normal_offsets =
+ p->texture_offsets = NULL;
+ p->s_bezier_cnt = p->t_bezier_cnt = 0;
}
-GLenum
-augment_new_ctrl(GLUnurbsObj *nobj, new_ctrl_type *p)
+
+static GLenum
+augment_new_ctrl(GLUnurbsObj * nobj, new_ctrl_type * p)
{
- GLsizei offset_size;
- GLint i,j;
+ GLsizei offset_size;
+ GLint i, j;
- p->s_bezier_cnt=(p->geom_s_pt_cnt)/(nobj->surface.geom.sorder);
- p->t_bezier_cnt=(p->geom_t_pt_cnt)/(nobj->surface.geom.torder);
- offset_size=(p->s_bezier_cnt)*(p->t_bezier_cnt);
- p->geom_t_stride=nobj->surface.geom.dim;
- p->geom_s_stride=(p->geom_t_pt_cnt)*(nobj->surface.geom.dim);
- p->color_t_stride=nobj->surface.color.dim;
- p->color_s_stride=(p->color_t_pt_cnt)*(nobj->surface.color.dim);
- p->normal_t_stride=nobj->surface.normal.dim;
- p->normal_s_stride=(p->normal_t_pt_cnt)*(nobj->surface.normal.dim);
- p->texture_t_stride=nobj->surface.texture.dim;
- p->texture_s_stride=(p->texture_t_pt_cnt)*(nobj->surface.texture.dim);
- if((p->geom_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if(p->color_ctrl)
- if((p->color_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- free_new_ctrl(p);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if(p->normal_ctrl)
- if((p->normal_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- free_new_ctrl(p);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- if(p->texture_ctrl)
- if((p->texture_offsets=(GLfloat **)malloc(sizeof(GLfloat *)*offset_size))==NULL)
- {
- free_new_ctrl(p);
- call_user_error(nobj,GLU_OUT_OF_MEMORY);
- return GLU_ERROR;
- }
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->geom_offsets + i*(p->t_bezier_cnt) + j) =
- p->geom_ctrl + i*(nobj->surface.geom.sorder)*
- (nobj->surface.geom.dim)*(p->geom_t_pt_cnt) +
- j*(nobj->surface.geom.dim)*(nobj->surface.geom.torder);
- if(p->color_ctrl)
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->color_offsets + i*(p->t_bezier_cnt) + j) =
- p->color_ctrl + i*(nobj->surface.color.sorder)*
- (nobj->surface.color.dim)*(p->color_t_pt_cnt) +
- j*(nobj->surface.color.dim)*(nobj->surface.color.torder);
- if(p->normal_ctrl)
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->normal_offsets + i*(p->t_bezier_cnt) + j) =
- p->normal_ctrl + i*(nobj->surface.normal.sorder)*
- (nobj->surface.normal.dim)*(p->normal_t_pt_cnt) +
- j*(nobj->surface.normal.dim)*(nobj->surface.normal.torder);
- if(p->texture_ctrl)
- for(i=0;i<p->s_bezier_cnt;i++)
- for(j=0;j<p->t_bezier_cnt;j++)
- *(p->texture_offsets + i*(p->t_bezier_cnt) + j) =
- p->texture_ctrl + i*(nobj->surface.texture.sorder)*
- (nobj->surface.texture.dim)*(p->texture_t_pt_cnt) +
- j*(nobj->surface.texture.dim)*(nobj->surface.texture.torder);
- return GLU_NO_ERROR;
+ p->s_bezier_cnt = (p->geom_s_pt_cnt) / (nobj->surface.geom.sorder);
+ p->t_bezier_cnt = (p->geom_t_pt_cnt) / (nobj->surface.geom.torder);
+ offset_size = (p->s_bezier_cnt) * (p->t_bezier_cnt);
+ p->geom_t_stride = nobj->surface.geom.dim;
+ p->geom_s_stride = (p->geom_t_pt_cnt) * (nobj->surface.geom.dim);
+ p->color_t_stride = nobj->surface.color.dim;
+ p->color_s_stride = (p->color_t_pt_cnt) * (nobj->surface.color.dim);
+ p->normal_t_stride = nobj->surface.normal.dim;
+ p->normal_s_stride = (p->normal_t_pt_cnt) * (nobj->surface.normal.dim);
+ p->texture_t_stride = nobj->surface.texture.dim;
+ p->texture_s_stride = (p->texture_t_pt_cnt) * (nobj->surface.texture.dim);
+ if (
+ (p->geom_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ if (p->color_ctrl)
+ if (
+ (p->color_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ free_new_ctrl(p);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ if (p->normal_ctrl)
+ if (
+ (p->normal_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ free_new_ctrl(p);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ if (p->texture_ctrl)
+ if (
+ (p->texture_offsets =
+ (GLfloat **) malloc(sizeof(GLfloat *) * offset_size)) == NULL) {
+ free_new_ctrl(p);
+ call_user_error(nobj, GLU_OUT_OF_MEMORY);
+ return GLU_ERROR;
+ }
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->geom_offsets + i * (p->t_bezier_cnt) + j) =
+ p->geom_ctrl + i * (nobj->surface.geom.sorder) *
+ (nobj->surface.geom.dim) * (p->geom_t_pt_cnt) +
+ j * (nobj->surface.geom.dim) * (nobj->surface.geom.torder);
+ if (p->color_ctrl)
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->color_offsets + i * (p->t_bezier_cnt) + j) =
+ p->color_ctrl + i * (nobj->surface.color.sorder) *
+ (nobj->surface.color.dim) * (p->color_t_pt_cnt) +
+ j * (nobj->surface.color.dim) * (nobj->surface.color.torder);
+ if (p->normal_ctrl)
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->normal_offsets + i * (p->t_bezier_cnt) + j) =
+ p->normal_ctrl + i * (nobj->surface.normal.sorder) *
+ (nobj->surface.normal.dim) * (p->normal_t_pt_cnt) +
+ j * (nobj->surface.normal.dim) * (nobj->surface.normal.torder);
+ if (p->texture_ctrl)
+ for (i = 0; i < p->s_bezier_cnt; i++)
+ for (j = 0; j < p->t_bezier_cnt; j++)
+ *(p->texture_offsets + i * (p->t_bezier_cnt) + j) =
+ p->texture_ctrl + i * (nobj->surface.texture.sorder) *
+ (nobj->surface.texture.dim) * (p->texture_t_pt_cnt) +
+ j * (nobj->surface.texture.dim) *
+ (nobj->surface.texture.torder);
+ return GLU_NO_ERROR;
}
/* main NURBS surface procedure */
void
-do_nurbs_surface( GLUnurbsObj *nobj )
+do_nurbs_surface(GLUnurbsObj * nobj)
{
- GLint *sfactors,*tfactors;
- new_ctrl_type new_ctrl;
+ GLint *sfactors, *tfactors;
+ new_ctrl_type new_ctrl;
- /* test user supplied data */
- if(test_nurbs_surfaces(nobj)!=GLU_NO_ERROR)
- return;
+ /* test user supplied data */
+ if (test_nurbs_surfaces(nobj) != GLU_NO_ERROR)
+ return;
- init_new_ctrl(&new_ctrl);
+ init_new_ctrl(&new_ctrl);
- if(convert_surfs(nobj,&new_ctrl)!=GLU_NO_ERROR)
- return;
- if(augment_new_ctrl(nobj,&new_ctrl)!=GLU_NO_ERROR)
- return;
- switch(nobj->sampling_method)
- {
- case GLU_PATH_LENGTH:
- if(glu_do_sampling_3D(nobj,&new_ctrl,&sfactors,&tfactors)!=
- GLU_NO_ERROR)
- {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- case GLU_DOMAIN_DISTANCE:
- if(glu_do_sampling_uv(nobj,&new_ctrl,&sfactors,&tfactors)!=
- GLU_NO_ERROR)
- {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- case GLU_PARAMETRIC_ERROR:
- if(glu_do_sampling_param_3D(nobj,&new_ctrl,&sfactors,&tfactors)!=
- GLU_NO_ERROR)
- {
- free_new_ctrl(&new_ctrl);
- return;
- }
- break;
- default:
- abort();
- }
- glFrontFace(GL_CW);
- switch(nobj->display_mode)
- {
- case GLU_FILL:
+ if (convert_surfs(nobj, &new_ctrl) != GLU_NO_ERROR)
+ return;
+ if (augment_new_ctrl(nobj, &new_ctrl) != GLU_NO_ERROR)
+ return;
+ switch (nobj->sampling_method) {
+ case GLU_PATH_LENGTH:
+ if (glu_do_sampling_3D(nobj, &new_ctrl, &sfactors, &tfactors) !=
+ GLU_NO_ERROR) {
+ free_new_ctrl(&new_ctrl);
+ return;
+ }
+ break;
+ case GLU_DOMAIN_DISTANCE:
+ if (glu_do_sampling_uv(nobj, &new_ctrl, &sfactors, &tfactors) !=
+ GLU_NO_ERROR) {
+ free_new_ctrl(&new_ctrl);
+ return;
+ }
+ break;
+ case GLU_PARAMETRIC_ERROR:
+ if (glu_do_sampling_param_3D(nobj, &new_ctrl, &sfactors, &tfactors) !=
+ GLU_NO_ERROR) {
+ free_new_ctrl(&new_ctrl);
+ return;
+ }
+ break;
+ default:
+ abort();
+ }
+ glFrontFace(GL_CW);
+ switch (nobj->display_mode) {
+ case GLU_FILL:
/* if(polygon_trimming(nobj,&new_ctrl,sfactors,tfactors)==GLU_NO_ERROR)*/
- draw_polygon_mode(GL_FILL,nobj,&new_ctrl,sfactors,tfactors);
- break;
- case GLU_OUTLINE_POLYGON:
- /* TODO - missing trimming handeling */
+ draw_polygon_mode(GL_FILL, nobj, &new_ctrl, sfactors, tfactors);
+ break;
+ case GLU_OUTLINE_POLYGON:
+ /* TODO - missing trimming handeling */
/* just for now - no OUTLINE_PATCH mode
draw_patch_mode(GL_LINE,nobj,&new_ctrl,sfactors,tfactors);
break; */
- case GLU_OUTLINE_PATCH:
+ case GLU_OUTLINE_PATCH:
/* if(polygon_trimming(nobj,&new_ctrl,sfactors,tfactors)==GLU_NO_ERROR)*/
- draw_polygon_mode(GL_LINE,nobj,&new_ctrl,sfactors,tfactors);
- break;
- default:
- abort(); /* TODO: is this OK? */
- }
- free(sfactors);
- free(tfactors);
- free_new_ctrl(&new_ctrl);
+ draw_polygon_mode(GL_LINE, nobj, &new_ctrl, sfactors, tfactors);
+ break;
+ default:
+ abort(); /* TODO: is this OK? */
+ }
+ free(sfactors);
+ free(tfactors);
+ free_new_ctrl(&new_ctrl);
}
-
projects / mesa.git / blobdiff