diff options
Diffstat (limited to 'src/glu/mesa/nurbs.h')
| -rw-r--r-- | src/glu/mesa/nurbs.h | 252 |
1 files changed, 252 insertions, 0 deletions
diff --git a/src/glu/mesa/nurbs.h b/src/glu/mesa/nurbs.h new file mode 100644 index 00000000000..fc2b4f7d557 --- /dev/null +++ b/src/glu/mesa/nurbs.h @@ -0,0 +1,252 @@ +/* $Id: nurbs.h,v 1.1 1999/08/19 00:55:42 jtg Exp $ */ + +/* + * Mesa 3-D graphics library + * Version: 3.1 + * Copyright (C) 1995-1999 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. + */ + + +/* + * $Log: nurbs.h,v $ + * Revision 1.1 1999/08/19 00:55:42 jtg + * Initial revision + * + * Revision 1.5 1999/02/27 13:55:31 brianp + * fixed BeOS-related GLU typedef problems + * + * Revision 1.4 1999/01/03 03:23:15 brianp + * now using GLAPIENTRY and GLCALLBACK keywords (Ted Jump) + * + * Revision 1.3 1997/05/27 03:18:23 brianp + * minor clean-up + * + * Revision 1.2 1997/05/27 03:00:16 brianp + * incorporated Bogdan's new NURBS code + * + * Revision 1.1 1996/09/27 01:19:39 brianp + * Initial revision + * + */ + + +/* + * NURBS implementation written by Bogdan Sikorski ([email protected]) + * 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 |