-/* $Id: nurbscrv.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: nurbscrv.c,v $
- * Revision 1.1 1999/08/19 00:55:42 jtg
- * Initial revision
- *
- * Revision 1.6 1997/07/24 01:28:44 brianp
- * changed precompiled header symbol from PCH to PC_HEADER
- *
- * 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 03:21:22 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 23:12:22 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_curve_dim(GLenum type)
{
- switch(type)
- {
- case GL_MAP1_VERTEX_3: return 3;
- case GL_MAP1_VERTEX_4: return 4;
- case GL_MAP1_INDEX: return 1;
- case GL_MAP1_COLOR_4: return 4;
- case GL_MAP1_NORMAL: return 3;
- case GL_MAP1_TEXTURE_COORD_1: return 1;
- case GL_MAP1_TEXTURE_COORD_2: return 2;
- case GL_MAP1_TEXTURE_COORD_3: return 3;
- case GL_MAP1_TEXTURE_COORD_4: return 4;
- default: abort(); /* TODO: is this OK? */
- }
- return 0; /*never get here*/
+ switch (type) {
+ case GL_MAP1_VERTEX_3:
+ return 3;
+ case GL_MAP1_VERTEX_4:
+ return 4;
+ case GL_MAP1_INDEX:
+ return 1;
+ case GL_MAP1_COLOR_4:
+ return 4;
+ case GL_MAP1_NORMAL:
+ return 3;
+ case GL_MAP1_TEXTURE_COORD_1:
+ return 1;
+ case GL_MAP1_TEXTURE_COORD_2:
+ return 2;
+ case GL_MAP1_TEXTURE_COORD_3:
+ return 3;
+ case GL_MAP1_TEXTURE_COORD_4:
+ return 4;
+ default:
+ abort(); /* TODO: is this OK? */
+ }
+ return 0; /*never get here */
}
static GLenum
-test_nurbs_curve(GLUnurbsObj *nobj, curve_attribs *attribs)
+test_nurbs_curve(GLUnurbsObj * nobj, curve_attribs * attribs)
{
- GLenum err;
- GLint tmp_int;
+ GLenum err;
+ GLint tmp_int;
- if(attribs->order < 0)
- {
- call_user_error(nobj,GLU_INVALID_VALUE);
- return GLU_ERROR;
- }
- glGetIntegerv(GL_MAX_EVAL_ORDER,&tmp_int);
- if(attribs->order > tmp_int || attribs->order < 2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR1);
- return GLU_ERROR;
- }
- if(attribs->knot_count < attribs->order +2)
- {
- call_user_error(nobj,GLU_NURBS_ERROR2);
- return GLU_ERROR;
- }
- if(attribs->stride < 0)
- {
- call_user_error(nobj,GLU_NURBS_ERROR34);
- return GLU_ERROR;
- }
- if(attribs->knot==NULL || attribs->ctrlarray==NULL)
- {
- call_user_error(nobj,GLU_NURBS_ERROR36);
- return GLU_ERROR;
- }
- if((err=test_knot(attribs->knot_count,attribs->knot,attribs->order))
- !=GLU_NO_ERROR)
- {
- call_user_error(nobj,err);
- return GLU_ERROR;
- }
- return GLU_NO_ERROR;
+ if (attribs->order < 0) {
+ call_user_error(nobj, GLU_INVALID_VALUE);
+ return GLU_ERROR;
+ }
+ glGetIntegerv(GL_MAX_EVAL_ORDER, &tmp_int);
+ if (attribs->order > tmp_int || attribs->order < 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR1);
+ return GLU_ERROR;
+ }
+ if (attribs->knot_count < attribs->order + 2) {
+ call_user_error(nobj, GLU_NURBS_ERROR2);
+ return GLU_ERROR;
+ }
+ if (attribs->stride < 0) {
+ call_user_error(nobj, GLU_NURBS_ERROR34);
+ return GLU_ERROR;
+ }
+ if (attribs->knot == NULL || attribs->ctrlarray == NULL) {
+ call_user_error(nobj, GLU_NURBS_ERROR36);
+ return GLU_ERROR;
+ }
+ if ((err = test_knot(attribs->knot_count, attribs->knot, attribs->order))
+ != GLU_NO_ERROR) {
+ call_user_error(nobj, err);
+ return GLU_ERROR;
+ }
+ return GLU_NO_ERROR;
}
static GLenum
-test_nurbs_curves(GLUnurbsObj *nobj)
+test_nurbs_curves(GLUnurbsObj * nobj)
{
- /* test the geometric data */
- if(test_nurbs_curve(nobj,&(nobj->curve.geom))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* now test the attributive data */
- /* color */
- if(nobj->curve.color.type!=GLU_INVALID_ENUM)
- if(test_nurbs_curve(nobj,&(nobj->curve.color))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* normal */
- if(nobj->curve.normal.type!=GLU_INVALID_ENUM)
- if(test_nurbs_curve(nobj,&(nobj->curve.normal))!=GLU_NO_ERROR)
- return GLU_ERROR;
- /* texture */
- if(nobj->curve.texture.type!=GLU_INVALID_ENUM)
- if(test_nurbs_curve(nobj,&(nobj->curve.texture))!=GLU_NO_ERROR)
- return GLU_ERROR;
- return GLU_NO_ERROR;
+ /* test the geometric data */
+ if (test_nurbs_curve(nobj, &(nobj->curve.geom)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* now test the attributive data */
+ /* color */
+ if (nobj->curve.color.type != GLU_INVALID_ENUM)
+ if (test_nurbs_curve(nobj, &(nobj->curve.color)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* normal */
+ if (nobj->curve.normal.type != GLU_INVALID_ENUM)
+ if (test_nurbs_curve(nobj, &(nobj->curve.normal)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ /* texture */
+ if (nobj->curve.texture.type != GLU_INVALID_ENUM)
+ if (test_nurbs_curve(nobj, &(nobj->curve.texture)) != GLU_NO_ERROR)
+ return GLU_ERROR;
+ return GLU_NO_ERROR;
}
/* prepare the knot information structures */
static GLenum
-fill_knot_structures(GLUnurbsObj *nobj,knot_str_type *geom_knot,
- knot_str_type *color_knot, knot_str_type *normal_knot,
- knot_str_type *texture_knot)
+fill_knot_structures(GLUnurbsObj * nobj, knot_str_type * geom_knot,
+ knot_str_type * color_knot, knot_str_type * normal_knot,
+ knot_str_type * texture_knot)
{
- GLint order;
- GLfloat *knot;
- GLint nknots;
- GLint t_min,t_max;
+ GLint order;
+ GLfloat *knot;
+ GLint nknots;
+ GLint t_min, t_max;
- geom_knot->unified_knot=NULL;
- knot=geom_knot->knot=nobj->curve.geom.knot;
- nknots=geom_knot->nknots=nobj->curve.geom.knot_count;
- order=geom_knot->order=nobj->curve.geom.order;
- geom_knot->delta_nknots=0;
- t_min=geom_knot->t_min=order-1;
- t_max=geom_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_knot->open_at_begin=GL_TRUE;
- }
- else
- geom_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- geom_knot->open_at_end=GL_TRUE;
- }
- else
- geom_knot->open_at_end=GL_FALSE;
- if(nobj->curve.color.type!=GLU_INVALID_ENUM)
- {
- color_knot->unified_knot=(GLfloat *)1;
- knot=color_knot->knot=nobj->curve.color.knot;
- nknots=color_knot->nknots=nobj->curve.color.knot_count;
- order=color_knot->order=nobj->curve.color.order;
- color_knot->delta_nknots=0;
- t_min=color_knot->t_min=order-1;
- t_max=color_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_knot->open_at_begin=GL_TRUE;
- }
- else
- color_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- color_knot->open_at_end=GL_TRUE;
- }
- else
- color_knot->open_at_end=GL_FALSE;
- }
- else
- color_knot->unified_knot=NULL;
- if(nobj->curve.normal.type!=GLU_INVALID_ENUM)
- {
- normal_knot->unified_knot=(GLfloat *)1;
- knot=normal_knot->knot=nobj->curve.normal.knot;
- nknots=normal_knot->nknots=nobj->curve.normal.knot_count;
- order=normal_knot->order=nobj->curve.normal.order;
- normal_knot->delta_nknots=0;
- t_min=normal_knot->t_min=order-1;
- t_max=normal_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_knot->open_at_begin=GL_TRUE;
- }
- else
- normal_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- normal_knot->open_at_end=GL_TRUE;
- }
- else
- normal_knot->open_at_end=GL_FALSE;
- }
- else
- normal_knot->unified_knot=NULL;
- if(nobj->curve.texture.type!=GLU_INVALID_ENUM)
- {
- texture_knot->unified_knot=(GLfloat *)1;
- knot=texture_knot->knot=nobj->curve.texture.knot;
- nknots=texture_knot->nknots=nobj->curve.texture.knot_count;
- order=texture_knot->order=nobj->curve.texture.order;
- texture_knot->delta_nknots=0;
- t_min=texture_knot->t_min=order-1;
- t_max=texture_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_knot->open_at_begin=GL_TRUE;
- }
- else
- texture_knot->open_at_begin=GL_FALSE;
- if(fabs(knot[t_max]-knot[nknots-1])<EPSILON)
- {
- /* knot open at end */
- texture_knot->open_at_end=GL_TRUE;
- }
- else
- texture_knot->open_at_end=GL_FALSE;
- }
- else
- texture_knot->unified_knot=NULL;
- return GLU_NO_ERROR;
+ geom_knot->unified_knot = NULL;
+ knot = geom_knot->knot = nobj->curve.geom.knot;
+ nknots = geom_knot->nknots = nobj->curve.geom.knot_count;
+ order = geom_knot->order = nobj->curve.geom.order;
+ geom_knot->delta_nknots = 0;
+ t_min = geom_knot->t_min = order - 1;
+ t_max = geom_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_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ geom_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ geom_knot->open_at_end = GL_TRUE;
+ }
+ else
+ geom_knot->open_at_end = GL_FALSE;
+ if (nobj->curve.color.type != GLU_INVALID_ENUM) {
+ color_knot->unified_knot = (GLfloat *) 1;
+ knot = color_knot->knot = nobj->curve.color.knot;
+ nknots = color_knot->nknots = nobj->curve.color.knot_count;
+ order = color_knot->order = nobj->curve.color.order;
+ color_knot->delta_nknots = 0;
+ t_min = color_knot->t_min = order - 1;
+ t_max = color_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_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ color_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ color_knot->open_at_end = GL_TRUE;
+ }
+ else
+ color_knot->open_at_end = GL_FALSE;
+ }
+ else
+ color_knot->unified_knot = NULL;
+ if (nobj->curve.normal.type != GLU_INVALID_ENUM) {
+ normal_knot->unified_knot = (GLfloat *) 1;
+ knot = normal_knot->knot = nobj->curve.normal.knot;
+ nknots = normal_knot->nknots = nobj->curve.normal.knot_count;
+ order = normal_knot->order = nobj->curve.normal.order;
+ normal_knot->delta_nknots = 0;
+ t_min = normal_knot->t_min = order - 1;
+ t_max = normal_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_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ normal_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ normal_knot->open_at_end = GL_TRUE;
+ }
+ else
+ normal_knot->open_at_end = GL_FALSE;
+ }
+ else
+ normal_knot->unified_knot = NULL;
+ if (nobj->curve.texture.type != GLU_INVALID_ENUM) {
+ texture_knot->unified_knot = (GLfloat *) 1;
+ knot = texture_knot->knot = nobj->curve.texture.knot;
+ nknots = texture_knot->nknots = nobj->curve.texture.knot_count;
+ order = texture_knot->order = nobj->curve.texture.order;
+ texture_knot->delta_nknots = 0;
+ t_min = texture_knot->t_min = order - 1;
+ t_max = texture_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_knot->open_at_begin = GL_TRUE;
+ }
+ else
+ texture_knot->open_at_begin = GL_FALSE;
+ if (fabs(knot[t_max] - knot[nknots - 1]) < EPSILON) {
+ /* knot open at end */
+ texture_knot->open_at_end = GL_TRUE;
+ }
+ else
+ texture_knot->open_at_end = GL_FALSE;
+ }
+ else
+ texture_knot->unified_knot = NULL;
+ return GLU_NO_ERROR;
}
/* covert the NURBS curve into a series of adjacent Bezier curves */
static GLenum
-convert_curve(knot_str_type *the_knot, curve_attribs *attrib,
- GLfloat **new_ctrl,GLint *ncontrol)
+convert_curve(knot_str_type * the_knot, curve_attribs * attrib,
+ GLfloat ** new_ctrl, GLint * ncontrol)
{
- GLenum err;
+ GLenum err;
- if((err=explode_knot(the_knot))!=GLU_NO_ERROR)
- {
- if(the_knot->unified_knot)
- {
- free(the_knot->unified_knot);
- the_knot->unified_knot=NULL;
- }
- return err;
- }
- if(the_knot->unified_knot)
- {
- free(the_knot->unified_knot);
- the_knot->unified_knot=NULL;
- }
- if((err=calc_alphas(the_knot))!=GLU_NO_ERROR)
- {
- free(the_knot->new_knot);
- return err;
- }
- free(the_knot->new_knot);
- if((err=calc_new_ctrl_pts(attrib->ctrlarray,attrib->stride,the_knot,
- attrib->dim,new_ctrl,ncontrol))
- !=GLU_NO_ERROR)
- {
- free(the_knot->alpha);
- return err;
- }
- free(the_knot->alpha);
- return GLU_NO_ERROR;
+ if ((err = explode_knot(the_knot)) != GLU_NO_ERROR) {
+ if (the_knot->unified_knot) {
+ free(the_knot->unified_knot);
+ the_knot->unified_knot = NULL;
+ }
+ return err;
+ }
+ if (the_knot->unified_knot) {
+ free(the_knot->unified_knot);
+ the_knot->unified_knot = NULL;
+ }
+ if ((err = calc_alphas(the_knot)) != GLU_NO_ERROR) {
+ free(the_knot->new_knot);
+ return err;
+ }
+ free(the_knot->new_knot);
+ if ((err = calc_new_ctrl_pts(attrib->ctrlarray, attrib->stride, the_knot,
+ attrib->dim, new_ctrl, ncontrol))
+ != GLU_NO_ERROR) {
+ free(the_knot->alpha);
+ return err;
+ }
+ free(the_knot->alpha);
+ return GLU_NO_ERROR;
}
/* covert curves - geometry and possible attribute ones into equivalent */
/* sequence of adjacent Bezier curves */
static GLenum
-convert_curves(GLUnurbsObj *nobj, GLfloat **new_geom_ctrl,
- GLint *ncontrol, GLfloat **new_color_ctrl, GLfloat **new_normal_ctrl,
- GLfloat **new_texture_ctrl)
+convert_curves(GLUnurbsObj * nobj, GLfloat ** new_geom_ctrl,
+ GLint * ncontrol, GLfloat ** new_color_ctrl,
+ GLfloat ** new_normal_ctrl, GLfloat ** new_texture_ctrl)
{
- knot_str_type geom_knot,color_knot,normal_knot,texture_knot;
- GLint junk;
- GLenum err;
+ knot_str_type geom_knot, color_knot, normal_knot, texture_knot;
+ GLint junk;
+ GLenum err;
- *new_color_ctrl=*new_normal_ctrl=*new_texture_ctrl=NULL;
+ *new_color_ctrl = *new_normal_ctrl = *new_texture_ctrl = NULL;
- if(fill_knot_structures(nobj,&geom_knot,&color_knot,&normal_knot,
- &texture_knot)!=GLU_NO_ERROR)
- return GLU_ERROR;
+ if (fill_knot_structures(nobj, &geom_knot, &color_knot, &normal_knot,
+ &texture_knot) != GLU_NO_ERROR)
+ return GLU_ERROR;
- /* unify knots - all knots should have the same number of working */
- /* ranges */
- if((err=select_knot_working_range(nobj,&geom_knot,&color_knot,&normal_knot,
- &texture_knot))!=GLU_NO_ERROR)
- {
- return err;
- }
- /* convert the geometry curve */
- nobj->curve.geom.dim=get_curve_dim(nobj->curve.geom.type);
- if((err=convert_curve(&geom_knot,&(nobj->curve.geom),new_geom_ctrl,
- ncontrol))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- call_user_error(nobj,err);
- return err;
- }
- /* if additional attributive curves are given convert them as well */
- if(color_knot.unified_knot)
- {
- nobj->curve.color.dim=get_curve_dim(nobj->curve.color.type);
- if((err=convert_curve(&color_knot,&(nobj->curve.color),
- new_color_ctrl,&junk))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- free(*new_geom_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(normal_knot.unified_knot)
- {
- nobj->curve.normal.dim=get_curve_dim(nobj->curve.normal.type);
- if((err=convert_curve(&normal_knot,&(nobj->curve.normal),
- new_normal_ctrl,&junk))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- free(*new_geom_ctrl);
- if(*new_color_ctrl)
- free(*new_color_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- if(texture_knot.unified_knot)
- {
- nobj->curve.texture.dim=get_curve_dim(nobj->curve.texture.type);
- if((err=convert_curve(&texture_knot,&(nobj->curve.texture),
- new_texture_ctrl,&junk))!=GLU_NO_ERROR)
- {
- free_unified_knots(&geom_knot,&color_knot,&normal_knot,&texture_knot);
- free(*new_geom_ctrl);
- if(*new_color_ctrl)
- free(*new_color_ctrl);
- if(*new_normal_ctrl)
- free(*new_normal_ctrl);
- call_user_error(nobj,err);
- return err;
- }
- }
- return GLU_NO_ERROR;
+ /* unify knots - all knots should have the same number of working */
+ /* ranges */
+ if (
+ (err =
+ select_knot_working_range(nobj, &geom_knot, &color_knot, &normal_knot,
+ &texture_knot)) != GLU_NO_ERROR) {
+ return err;
+ }
+ /* convert the geometry curve */
+ nobj->curve.geom.dim = get_curve_dim(nobj->curve.geom.type);
+ if ((err = convert_curve(&geom_knot, &(nobj->curve.geom), new_geom_ctrl,
+ ncontrol)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ call_user_error(nobj, err);
+ return err;
+ }
+ /* if additional attributive curves are given convert them as well */
+ if (color_knot.unified_knot) {
+ nobj->curve.color.dim = get_curve_dim(nobj->curve.color.type);
+ if ((err = convert_curve(&color_knot, &(nobj->curve.color),
+ new_color_ctrl, &junk)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ free(*new_geom_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (normal_knot.unified_knot) {
+ nobj->curve.normal.dim = get_curve_dim(nobj->curve.normal.type);
+ if ((err = convert_curve(&normal_knot, &(nobj->curve.normal),
+ new_normal_ctrl, &junk)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ free(*new_geom_ctrl);
+ if (*new_color_ctrl)
+ free(*new_color_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ if (texture_knot.unified_knot) {
+ nobj->curve.texture.dim = get_curve_dim(nobj->curve.texture.type);
+ if ((err = convert_curve(&texture_knot, &(nobj->curve.texture),
+ new_texture_ctrl, &junk)) != GLU_NO_ERROR) {
+ free_unified_knots(&geom_knot, &color_knot, &normal_knot,
+ &texture_knot);
+ free(*new_geom_ctrl);
+ if (*new_color_ctrl)
+ free(*new_color_ctrl);
+ if (*new_normal_ctrl)
+ free(*new_normal_ctrl);
+ call_user_error(nobj, err);
+ return err;
+ }
+ }
+ return GLU_NO_ERROR;
}
/* main NURBS curve procedure */
-void do_nurbs_curve( GLUnurbsObj *nobj)
+void
+do_nurbs_curve(GLUnurbsObj * nobj)
{
- GLint geom_order,color_order=0,normal_order=0,texture_order=0;
- GLenum geom_type;
- GLint n_ctrl;
- GLfloat *new_geom_ctrl,*new_color_ctrl,*new_normal_ctrl,*new_texture_ctrl;
- GLfloat *geom_ctrl,*color_ctrl,*normal_ctrl,*texture_ctrl;
- GLint *factors;
- GLint i,j;
- GLint geom_dim,color_dim=0,normal_dim=0,texture_dim=0;
+ GLint geom_order, color_order = 0, normal_order = 0, texture_order = 0;
+ GLenum geom_type;
+ GLint n_ctrl;
+ GLfloat *new_geom_ctrl, *new_color_ctrl, *new_normal_ctrl,
+ *new_texture_ctrl;
+ GLfloat *geom_ctrl = 0, *color_ctrl = 0, *normal_ctrl = 0, *texture_ctrl = 0;
+ GLint *factors;
+ GLint i, j;
+ GLint geom_dim, color_dim = 0, normal_dim = 0, texture_dim = 0;
- /* test the user supplied data */
- if(test_nurbs_curves(nobj)!=GLU_NO_ERROR)
- return;
+ /* test the user supplied data */
+ if (test_nurbs_curves(nobj) != GLU_NO_ERROR)
+ return;
- if(convert_curves(nobj,&new_geom_ctrl,&n_ctrl,&new_color_ctrl,
- &new_normal_ctrl,&new_texture_ctrl)!=GLU_NO_ERROR)
- return;
+ if (convert_curves(nobj, &new_geom_ctrl, &n_ctrl, &new_color_ctrl,
+ &new_normal_ctrl, &new_texture_ctrl) != GLU_NO_ERROR)
+ return;
- geom_order=nobj->curve.geom.order;
- geom_type=nobj->curve.geom.type;
- geom_dim=nobj->curve.geom.dim;
+ geom_order = nobj->curve.geom.order;
+ geom_type = nobj->curve.geom.type;
+ geom_dim = nobj->curve.geom.dim;
- if(glu_do_sampling_crv(nobj,new_geom_ctrl,n_ctrl,geom_order,geom_dim,
- &factors)
- !=GLU_NO_ERROR)
- {
- free(new_geom_ctrl);
- if(new_color_ctrl)
- free(new_color_ctrl);
- if(new_normal_ctrl)
- free(new_normal_ctrl);
- if(new_texture_ctrl)
- free(new_texture_ctrl);
- return;
- }
- glEnable(geom_type);
- if(new_color_ctrl)
- {
- glEnable(nobj->curve.color.type);
- color_dim=nobj->curve.color.dim;
- color_ctrl=new_color_ctrl;
- color_order=nobj->curve.color.order;
- }
- if(new_normal_ctrl)
- {
- glEnable(nobj->curve.normal.type);
- normal_dim=nobj->curve.normal.dim;
- normal_ctrl=new_normal_ctrl;
- normal_order=nobj->curve.normal.order;
- }
- if(new_texture_ctrl)
- {
- glEnable(nobj->curve.texture.type);
- texture_dim=nobj->curve.texture.dim;
- texture_ctrl=new_texture_ctrl;
- texture_order=nobj->curve.texture.order;
- }
- for(i=0 , j=0, geom_ctrl=new_geom_ctrl;
- i<n_ctrl;
- i+=geom_order , j++ , geom_ctrl+=geom_order*geom_dim)
- {
- if(fine_culling_test_2D(nobj,geom_ctrl,geom_order,geom_dim,geom_dim))
- {
- color_ctrl+=color_order*color_dim;
- normal_ctrl+=normal_order*normal_dim;
- texture_ctrl+=texture_order*texture_dim;
- continue;
- }
- glMap1f(geom_type, 0.0, 1.0, geom_dim, geom_order, geom_ctrl);
- if(new_color_ctrl)
- {
- glMap1f(nobj->curve.color.type, 0.0, 1.0, color_dim,
- color_order,color_ctrl);
- color_ctrl+=color_order*color_dim;
- }
- if(new_normal_ctrl)
- {
- glMap1f(nobj->curve.normal.type, 0.0, 1.0, normal_dim,
- normal_order,normal_ctrl);
- normal_ctrl+=normal_order*normal_dim;
- }
- if(new_texture_ctrl)
- {
- glMap1f(nobj->curve.texture.type, 0.0, 1.0, texture_dim,
- texture_order,texture_ctrl);
- texture_ctrl+=texture_order*texture_dim;
- }
- glMapGrid1f(factors[j],0.0,1.0);
- glEvalMesh1(GL_LINE,0,factors[j]);
- }
- free(new_geom_ctrl);
- free(factors);
- if(new_color_ctrl)
- free(new_color_ctrl);
- if(new_normal_ctrl)
- free(new_normal_ctrl);
- if(new_texture_ctrl)
- free(new_texture_ctrl);
+ if (glu_do_sampling_crv(nobj, new_geom_ctrl, n_ctrl, geom_order, geom_dim,
+ &factors) != GLU_NO_ERROR) {
+ free(new_geom_ctrl);
+ if (new_color_ctrl)
+ free(new_color_ctrl);
+ if (new_normal_ctrl)
+ free(new_normal_ctrl);
+ if (new_texture_ctrl)
+ free(new_texture_ctrl);
+ return;
+ }
+ glEnable(geom_type);
+ if (new_color_ctrl) {
+ glEnable(nobj->curve.color.type);
+ color_dim = nobj->curve.color.dim;
+ color_ctrl = new_color_ctrl;
+ color_order = nobj->curve.color.order;
+ }
+ if (new_normal_ctrl) {
+ glEnable(nobj->curve.normal.type);
+ normal_dim = nobj->curve.normal.dim;
+ normal_ctrl = new_normal_ctrl;
+ normal_order = nobj->curve.normal.order;
+ }
+ if (new_texture_ctrl) {
+ glEnable(nobj->curve.texture.type);
+ texture_dim = nobj->curve.texture.dim;
+ texture_ctrl = new_texture_ctrl;
+ texture_order = nobj->curve.texture.order;
+ }
+ for (i = 0, j = 0, geom_ctrl = new_geom_ctrl;
+ i < n_ctrl; i += geom_order, j++, geom_ctrl += geom_order * geom_dim) {
+ if (fine_culling_test_2D
+ (nobj, geom_ctrl, geom_order, geom_dim, geom_dim)) {
+ color_ctrl += color_order * color_dim;
+ normal_ctrl += normal_order * normal_dim;
+ texture_ctrl += texture_order * texture_dim;
+ continue;
+ }
+ glMap1f(geom_type, 0.0, 1.0, geom_dim, geom_order, geom_ctrl);
+ if (new_color_ctrl) {
+ glMap1f(nobj->curve.color.type, 0.0, 1.0, color_dim,
+ color_order, color_ctrl);
+ color_ctrl += color_order * color_dim;
+ }
+ if (new_normal_ctrl) {
+ glMap1f(nobj->curve.normal.type, 0.0, 1.0, normal_dim,
+ normal_order, normal_ctrl);
+ normal_ctrl += normal_order * normal_dim;
+ }
+ if (new_texture_ctrl) {
+ glMap1f(nobj->curve.texture.type, 0.0, 1.0, texture_dim,
+ texture_order, texture_ctrl);
+ texture_ctrl += texture_order * texture_dim;
+ }
+ glMapGrid1f(factors[j], 0.0, 1.0);
+ glEvalMesh1(GL_LINE, 0, factors[j]);
+ }
+ free(new_geom_ctrl);
+ free(factors);
+ if (new_color_ctrl)
+ free(new_color_ctrl);
+ if (new_normal_ctrl)
+ free(new_normal_ctrl);
+ if (new_texture_ctrl)
+ free(new_texture_ctrl);
}
-
-
projects / mesa.git / blobdiff