+++ /dev/null
-
-/*
- * Mesa 3-D graphics library
- * 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
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Library General Public License for more details.
- *
- * You should have received a copy of the GNU Library General Public
- * License along with this library; if not, write to the Free
- * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
- */
-
-
-/*
- * NURBS implementation written by Bogdan Sikorski (bogdan@cira.it)
- * See README2 for more info.
- */
-
-
-#ifndef NURBS_H
-#define NURBS_H
-
-
-#define EPSILON 1e-06 /* epsilon for double precision compares */
-
-typedef enum
-{
- GLU_NURBS_CURVE, GLU_NURBS_SURFACE, GLU_NURBS_TRIM, GLU_NURBS_NO_TRIM,
- GLU_NURBS_TRIM_DONE, GLU_NURBS_NONE
-}
-GLU_nurbs_enum;
-
-typedef enum
-{
- GLU_TRIM_NURBS, GLU_TRIM_PWL
-}
-GLU_trim_enum;
-
-typedef struct
-{
- GLint sknot_count;
- GLfloat *sknot;
- GLint tknot_count;
- GLfloat *tknot;
- GLint s_stride;
- GLint t_stride;
- GLfloat *ctrlarray;
- GLint sorder;
- GLint torder;
- GLint dim;
- GLenum type;
-}
-surface_attribs;
-
-typedef struct
-{
- surface_attribs geom;
- surface_attribs color;
- surface_attribs texture;
- surface_attribs normal;
-}
-nurbs_surface;
-
-typedef struct
-{
- GLint knot_count;
- GLfloat *knot;
- GLint stride;
- GLfloat *ctrlarray;
- GLint order;
- GLint dim;
- GLenum type;
-}
-curve_attribs;
-
-typedef struct
-{
- GLint pt_count;
- GLfloat *ctrlarray;
- GLint stride;
- GLint dim;
- GLenum type;
-}
-pwl_curve_attribs;
-
-typedef struct
-{
- curve_attribs geom;
- curve_attribs color;
- curve_attribs texture;
- curve_attribs normal;
-}
-nurbs_curve;
-
-typedef struct trim_list_str
-{
- GLU_trim_enum trim_type;
- union
- {
- pwl_curve_attribs pwl_curve;
- curve_attribs nurbs_curve;
- }
- curve;
- struct trim_list_str *next;
-}
-trim_list;
-
-typedef struct seg_trim_str
-{
- GLfloat *points;
- GLint pt_cnt, seg_array_len;
- struct seg_trim_str *next;
-}
-trim_segments;
-
-typedef struct nurbs_trim_str
-{
- trim_list *trim_loop;
- trim_segments *segments;
- struct nurbs_trim_str *next;
-}
-nurbs_trim;
-
-typedef struct
-{
- GLfloat model[16], proj[16], viewport[4];
-}
-culling_and_sampling_str;
-
-struct GLUnurbs
-{
- GLboolean culling;
- GLenum error;
- void (GLCALLBACK * error_callback) (GLenum err);
- GLenum display_mode;
- GLU_nurbs_enum nurbs_type;
- GLboolean auto_load_matrix;
- culling_and_sampling_str sampling_matrices;
- GLenum sampling_method;
- GLfloat sampling_tolerance;
- GLfloat parametric_tolerance;
- GLint u_step, v_step;
- nurbs_surface surface;
- nurbs_curve curve;
- nurbs_trim *trim;
-};
-
-typedef struct
-{
- GLfloat *knot;
- GLint nknots;
- GLfloat *unified_knot;
- GLint unified_nknots;
- GLint order;
- GLint t_min, t_max;
- GLint delta_nknots;
- GLboolean open_at_begin, open_at_end;
- GLfloat *new_knot;
- GLfloat *alpha;
-}
-knot_str_type;
-
-typedef struct
-{
- GLfloat *geom_ctrl;
- GLint geom_s_stride, geom_t_stride;
- GLfloat **geom_offsets;
- GLint geom_s_pt_cnt, geom_t_pt_cnt;
- GLfloat *color_ctrl;
- GLint color_s_stride, color_t_stride;
- GLfloat **color_offsets;
- GLint color_s_pt_cnt, color_t_pt_cnt;
- GLfloat *normal_ctrl;
- GLint normal_s_stride, normal_t_stride;
- GLfloat **normal_offsets;
- GLint normal_s_pt_cnt, normal_t_pt_cnt;
- GLfloat *texture_ctrl;
- GLint texture_s_stride, texture_t_stride;
- GLfloat **texture_offsets;
- GLint texture_s_pt_cnt, texture_t_pt_cnt;
- GLint s_bezier_cnt, t_bezier_cnt;
-}
-new_ctrl_type;
-
-extern void call_user_error(GLUnurbsObj * nobj, GLenum error);
-
-extern GLenum test_knot(GLint nknots, GLfloat * knot, GLint order);
-
-extern GLenum explode_knot(knot_str_type * the_knot);
-
-extern GLenum calc_alphas(knot_str_type * the_knot);
-
-extern GLenum calc_new_ctrl_pts(GLfloat * ctrl, GLint stride,
- knot_str_type * the_knot, GLint dim,
- GLfloat ** new_ctrl, GLint * ncontrol);
-
-extern GLenum glu_do_sampling_crv(GLUnurbsObj * nobj, GLfloat * new_ctrl,
- GLint n_ctrl, GLint order, GLint dim,
- GLint ** factors);
-
-extern GLenum glu_do_sampling_3D(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLenum glu_do_sampling_uv(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLenum glu_do_sampling_param_3D(GLUnurbsObj * nobj,
- new_ctrl_type * new_ctrl,
- int **sfactors, GLint ** tfactors);
-
-extern GLboolean fine_culling_test_2D(GLUnurbsObj * nobj, GLfloat * ctrl,
- GLint n_ctrl, GLint stride, GLint dim);
-
-extern GLboolean fine_culling_test_3D(GLUnurbsObj * nobj, GLfloat * ctrl,
- GLint s_n_ctrl, GLint t_n_ctrl,
- GLint s_stride, GLint t_stride,
- GLint dim);
-
-extern void do_nurbs_curve(GLUnurbsObj * nobj);
-
-extern void do_nurbs_surface(GLUnurbsObj * nobj);
-
-extern GLenum patch_trimming(GLUnurbsObj * nobj, new_ctrl_type * new_ctrl,
- GLint * sfactors, GLint * tfactors);
-
-extern void collect_unified_knot(knot_str_type * dest, knot_str_type * src,
- GLfloat maximal_min_knot,
- GLfloat minimal_max_knot);
-
-extern GLenum select_knot_working_range(GLUnurbsObj * nobj,
- knot_str_type * geom_knot,
- knot_str_type * color_knot,
- knot_str_type * normal_knot,
- knot_str_type * texture_knot);
-
-extern void free_unified_knots(knot_str_type * geom_knot,
- knot_str_type * color_knot,
- knot_str_type * normal_knot,
- knot_str_type * texture_knot);
-
-
-
-#endif
projects / mesa.git / blobdiff