2 ** License Applicability. Except to the extent portions of this file are
3 ** made subject to an alternative license as permitted in the SGI Free
4 ** Software License B, Version 1.1 (the "License"), the contents of this
5 ** file are subject only to the provisions of the License. You may not use
6 ** this file except in compliance with the License. You may obtain a copy
7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
10 ** http://oss.sgi.com/projects/FreeB
12 ** Note that, as provided in the License, the Software is distributed on an
13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21 ** Copyright in any portions created by third parties is as indicated
22 ** elsewhere herein. All Rights Reserved.
24 ** Additional Notice Provisions: The application programming interfaces
25 ** established by SGI in conjunction with the Original Code are The
26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31 ** published by SGI, but has not been independently verified as being
32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
38 * $Date: 2001/07/16 15:46:42 $ $Revision: 1.2 $
39 * $Header: /home/krh/git/sync/mesa-cvs-repo/Mesa/src/glu/sgi/libnurbs/interface/glsurfeval.h,v 1.2 2001/07/16 15:46:42 brianp Exp $
42 #ifndef __gluglsurfeval_h_
43 #define __gluglsurfeval_h_
45 #include "basicsurfeval.h"
46 #include "bezierPatchMesh.h" //in case output triangles
50 class OpenGLSurfaceEvaluator
;
56 /* Cache up to 3 vertices from tmeshes */
57 #define VERTEX_CACHE_SIZE 3
59 /*for internal evaluator callback stuff*/
60 #ifndef IN_MAX_BEZIER_ORDER
61 #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
64 #ifndef IN_MAX_DIMENSION
65 #define IN_MAX_DIMENSION 4
68 typedef struct surfEvalMachine
{
69 REAL uprime
;//cached previusly evaluated uprime.
71 int k
; /*the dimension*/
80 REAL ctlPoints
[IN_MAX_BEZIER_ORDER
*IN_MAX_BEZIER_ORDER
*IN_MAX_DIMENSION
];
81 REAL ucoeff
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial values*/
82 REAL vcoeff
[IN_MAX_BEZIER_ORDER
];
83 REAL ucoeffDeriv
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial derivatives*/
84 REAL vcoeffDeriv
[IN_MAX_BEZIER_ORDER
];
91 StoredVertex() { type
= 0; }
92 ~StoredVertex(void) {}
93 void saveEvalCoord(REAL x
, REAL y
)
94 {coord
[0] = x
; coord
[1] = y
; type
= TYPECOORD
; }
95 void saveEvalPoint(long x
, long y
)
96 {point
[0] = x
; point
[1] = y
; type
= TYPEPOINT
; }
97 void invoke(OpenGLSurfaceEvaluator
*eval
);
105 class OpenGLSurfaceEvaluator
: public BasicSurfaceEvaluator
{
107 OpenGLSurfaceEvaluator();
108 ~OpenGLSurfaceEvaluator( void );
109 void polymode( long style
);
110 void range2f( long, REAL
*, REAL
* );
111 void domain2f( REAL
, REAL
, REAL
, REAL
);
112 void addMap( SurfaceMap
* ) { }
115 void disable( long );
116 void bgnmap2f( long );
117 void map2f( long, REAL
, REAL
, long, long,
118 REAL
, REAL
, long, long, REAL
* );
119 void mapgrid2f( long, REAL
, REAL
, long, REAL
, REAL
);
120 void mapmesh2f( long, long, long, long, long );
121 void evalcoord2f( long, REAL
, REAL
);
122 void evalpoint2i( long, long );
123 void endmap2f( void );
125 void bgnline( void );
126 void endline( void );
127 void bgnclosedline( void );
128 void endclosedline( void );
129 void bgntmesh( void );
130 void swaptmesh( void );
131 void endtmesh( void );
132 void bgnqstrip( void );
133 void endqstrip( void );
135 void bgntfan( void );
136 void endtfan( void );
137 void evalUStrip(int n_upper
, REAL v_upper
, REAL
* upper_val
,
138 int n_lower
, REAL v_lower
, REAL
* lower_val
);
139 void evalVStrip(int n_left
, REAL u_left
, REAL
* left_val
,
140 int n_right
, REAL u_right
, REAL
* right_val
);
142 void coord2f( REAL
, REAL
);
143 void point2i( long, long );
145 void newtmeshvert( REAL
, REAL
);
146 void newtmeshvert( long, long );
148 void putCallBack(GLenum which
, _GLUfuncptr fn
);
149 int get_vertices_call_back()
151 return output_triangles
;
153 void put_vertices_call_back(int flag
)
155 output_triangles
= flag
;
158 void put_callback_auto_normal(int flag
)
160 callback_auto_normal
= flag
;
163 int get_callback_auto_normal()
165 return callback_auto_normal
;
168 void set_callback_userData(void* data
)
173 /**************begin for LOD_eval_list***********/
174 void LOD_eval_list(int level
);
180 StoredVertex
*vertexCache
[VERTEX_CACHE_SIZE
];
185 GLint gl_polygon_mode
[2];/*to save and restore so that
188 bezierPatchMesh
*global_bpm
; //for output triangles
189 int output_triangles
; //true 1 or false 0
193 void (GLAPIENTRY
*beginCallBackN
) (GLenum type
);
194 void (GLAPIENTRY
*endCallBackN
) (void);
195 void (GLAPIENTRY
*vertexCallBackN
) (const GLfloat
*vert
);
196 void (GLAPIENTRY
*normalCallBackN
) (const GLfloat
*normal
);
197 void (GLAPIENTRY
*colorCallBackN
) (const GLfloat
*color
);
198 void (GLAPIENTRY
*texcoordCallBackN
) (const GLfloat
*texcoord
);
200 void (GLAPIENTRY
*beginCallBackData
) (GLenum type
, void* data
);
201 void (GLAPIENTRY
*endCallBackData
) (void* data
);
202 void (GLAPIENTRY
*vertexCallBackData
) (const GLfloat
*vert
, void* data
);
203 void (GLAPIENTRY
*normalCallBackData
) (const GLfloat
*normal
, void* data
);
204 void (GLAPIENTRY
*colorCallBackData
) (const GLfloat
*color
, void* data
);
205 void (GLAPIENTRY
*texcoordCallBackData
) (const GLfloat
*texcoord
, void* data
);
207 void beginCallBack (GLenum type
, void* data
);
208 void endCallBack (void* data
);
209 void vertexCallBack (const GLfloat
*vert
, void* data
);
210 void normalCallBack (const GLfloat
*normal
, void* data
);
211 void colorCallBack (const GLfloat
*color
, void* data
);
212 void texcoordCallBack (const GLfloat
*texcoord
, void* data
);
215 void* userData
; //the opaque pointer for Data callback functions.
218 void LOD_triangle(REAL A
[2], REAL B
[2], REAL C
[2],
220 void LOD_eval(int num_vert
, REAL
* verts
, int type
, int level
);
222 int LOD_eval_level
; //set by LOD_eval_list()
224 /*************begin for internal evaluators*****************/
226 /*the following global variables are only defined in this file.
227 *They are used to cache the precomputed Bezier polynomial values.
228 *These calues may be used consecutively in which case we don't have
229 *recompute these values again.
231 int global_uorder
; /*store the uorder in the previous evaluation*/
232 int global_vorder
; /*store the vorder in the previous evaluation*/
235 REAL global_vprime_BV
;
236 REAL global_uprime_BU
;
237 int global_uorder_BV
; /*store the uorder in the previous evaluation*/
238 int global_vorder_BV
; /*store the vorder in the previous evaluation*/
239 int global_uorder_BU
; /*store the uorder in the previous evaluation*/
240 int global_vorder_BU
; /*store the vorder in the previous evaluation*/
242 REAL global_ucoeff
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial values*/
243 REAL global_vcoeff
[IN_MAX_BEZIER_ORDER
];
244 REAL global_ucoeffDeriv
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial derivatives*/
245 REAL global_vcoeffDeriv
[IN_MAX_BEZIER_ORDER
];
247 REAL global_BV
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
248 REAL global_PBV
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
249 REAL global_BU
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
250 REAL global_PBU
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
251 REAL
* global_baseData
;
253 int global_ev_k
; /*the dimension*/
256 int global_ev_ustride
;
257 int global_ev_uorder
;
260 int global_ev_vstride
;
261 int global_ev_vorder
;
262 REAL global_ev_ctlPoints
[IN_MAX_BEZIER_ORDER
*IN_MAX_BEZIER_ORDER
*IN_MAX_DIMENSION
];
272 void inDoDomain2WithDerivs(int k
, REAL u
, REAL v
,
273 REAL u1
, REAL u2
, int uorder
,
274 REAL v1
, REAL v2
, int vorder
,
276 REAL
*retPoint
, REAL
*retdu
, REAL
*retdv
);
277 void inPreEvaluate(int order
, REAL vprime
, REAL
*coeff
);
278 void inPreEvaluateWithDeriv(int order
, REAL vprime
, REAL
*coeff
, REAL
*coeffDeriv
);
279 void inComputeFirstPartials(REAL
*p
, REAL
*pu
, REAL
*pv
);
280 void inComputeNormal2(REAL
*pu
, REAL
*pv
, REAL
*n
);
281 void inDoEvalCoord2(REAL u
, REAL v
,
282 REAL
*retPoint
, REAL
*retNormal
);
283 void inDoEvalCoord2NOGE(REAL u
, REAL v
,
284 REAL
*retPoint
, REAL
*retNormal
);
296 void inMapGrid2f(int nu
, REAL u0
, REAL u1
,
297 int nv
, REAL v0
, REAL v1
);
299 void inEvalMesh2(int lowU
, int lowV
, int highU
, int highV
);
300 void inEvalPoint2(int i
, int j
);
301 void inEvalCoord2f(REAL u
, REAL v
);
303 void inEvalULine(int n_points
, REAL v
, REAL
* u_vals
,
304 int stride
, REAL ret_points
[][3], REAL ret_normals
[][3]);
306 void inEvalVLine(int n_points
, REAL u
, REAL
* v_vals
,
307 int stride
, REAL ret_points
[][3], REAL ret_normals
[][3]);
309 void inEvalUStrip(int n_upper
, REAL v_upper
, REAL
* upper_val
,
310 int n_lower
, REAL v_lower
, REAL
* lower_val
312 void inEvalVStrip(int n_left
, REAL u_left
, REAL
* left_val
, int n_right
, REAL u_right
, REAL
* right_val
);
314 void inPreEvaluateBV(int k
, int uorder
, int vorder
, REAL vprime
, REAL
*baseData
);
315 void inPreEvaluateBU(int k
, int uorder
, int vorder
, REAL uprime
, REAL
*baseData
);
316 void inPreEvaluateBV_intfac(REAL v
)
318 inPreEvaluateBV(global_ev_k
, global_ev_uorder
, global_ev_vorder
, (v
-global_ev_v1
)/(global_ev_v2
-global_ev_v1
), global_ev_ctlPoints
);
321 void inPreEvaluateBU_intfac(REAL u
)
323 inPreEvaluateBU(global_ev_k
, global_ev_uorder
, global_ev_vorder
, (u
-global_ev_u1
)/(global_ev_u2
-global_ev_u1
), global_ev_ctlPoints
);
326 void inDoDomain2WithDerivsBV(int k
, REAL u
, REAL v
,
327 REAL u1
, REAL u2
, int uorder
,
328 REAL v1
, REAL v2
, int vorder
,
330 REAL
*retPoint
, REAL
* retdu
, REAL
*retdv
);
332 void inDoDomain2WithDerivsBU(int k
, REAL u
, REAL v
,
333 REAL u1
, REAL u2
, int uorder
,
334 REAL v1
, REAL v2
, int vorder
,
336 REAL
*retPoint
, REAL
* retdu
, REAL
*retdv
);
339 void inDoEvalCoord2NOGE_BV(REAL u
, REAL v
,
340 REAL
*retPoint
, REAL
*retNormal
);
342 void inDoEvalCoord2NOGE_BU(REAL u
, REAL v
,
343 REAL
*retPoint
, REAL
*retNormal
);
345 void inBPMEval(bezierPatchMesh
* bpm
);
346 void inBPMListEval(bezierPatchMesh
* list
);
348 /*-------------begin for surfEvalMachine -------------*/
349 surfEvalMachine em_vertex
;
350 surfEvalMachine em_normal
;
351 surfEvalMachine em_color
;
352 surfEvalMachine em_texcoord
;
354 int auto_normal_flag
; //whether to output normla or not in callback
355 //determined by GL_AUTO_NORMAL and callback_auto_normal
356 int callback_auto_normal
; //GLU_CALLBACK_AUTO_NORMAL_EXT
362 void inMap2fEM(int which
, //0:vert,1:norm,2:color,3:tex
374 void inDoDomain2WithDerivsEM(surfEvalMachine
*em
, REAL u
, REAL v
,
375 REAL
*retPoint
, REAL
*retdu
, REAL
*retdv
);
376 void inDoDomain2EM(surfEvalMachine
*em
, REAL u
, REAL v
,
378 void inDoEvalCoord2EM(REAL u
, REAL v
);
380 void inBPMEvalEM(bezierPatchMesh
* bpm
);
381 void inBPMListEvalEM(bezierPatchMesh
* list
);
383 /*-------------end for surfEvalMachine -------------*/
386 /*************end for internal evaluators*****************/
390 inline void StoredVertex::invoke(OpenGLSurfaceEvaluator
*eval
)
394 eval
->coord2f(coord
[0], coord
[1]);
397 eval
->point2i(point
[0], point
[1]);
404 #endif /* __gluglsurfeval_h_ */