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.
40 #ifndef __gluglsurfeval_h_
41 #define __gluglsurfeval_h_
43 #include "basicsurfeval.h"
44 #include "bezierPatchMesh.h" //in case output triangles
49 class OpenGLSurfaceEvaluator
;
55 /* Cache up to 3 vertices from tmeshes */
56 #define VERTEX_CACHE_SIZE 3
58 /*for internal evaluator callback stuff*/
59 #ifndef IN_MAX_BEZIER_ORDER
60 #define IN_MAX_BEZIER_ORDER 40 /*XXX should be bigger than machine order*/
63 #ifndef IN_MAX_DIMENSION
64 #define IN_MAX_DIMENSION 4
67 typedef struct surfEvalMachine
{
68 REAL uprime
;//cached previusly evaluated uprime.
70 int k
; /*the dimension*/
79 REAL ctlPoints
[IN_MAX_BEZIER_ORDER
*IN_MAX_BEZIER_ORDER
*IN_MAX_DIMENSION
];
80 REAL ucoeff
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial values*/
81 REAL vcoeff
[IN_MAX_BEZIER_ORDER
];
82 REAL ucoeffDeriv
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial derivatives*/
83 REAL vcoeffDeriv
[IN_MAX_BEZIER_ORDER
];
90 StoredVertex() { type
= 0; }
91 ~StoredVertex(void) {}
92 void saveEvalCoord(REAL x
, REAL y
)
93 {coord
[0] = x
; coord
[1] = y
; type
= TYPECOORD
; }
94 void saveEvalPoint(long x
, long y
)
95 {point
[0] = x
; point
[1] = y
; type
= TYPEPOINT
; }
96 void invoke(OpenGLSurfaceEvaluator
*eval
);
104 class OpenGLSurfaceEvaluator
: public BasicSurfaceEvaluator
{
106 OpenGLSurfaceEvaluator();
107 virtual ~OpenGLSurfaceEvaluator( void );
108 void polymode( long style
);
109 void range2f( long, REAL
*, REAL
* );
110 void domain2f( REAL
, REAL
, REAL
, REAL
);
111 void addMap( SurfaceMap
* ) { }
114 void disable( long );
115 void bgnmap2f( long );
116 void map2f( long, REAL
, REAL
, long, long,
117 REAL
, REAL
, long, long, REAL
* );
118 void mapgrid2f( long, REAL
, REAL
, long, REAL
, REAL
);
119 void mapmesh2f( long, long, long, long, long );
120 void evalcoord2f( long, REAL
, REAL
);
121 void evalpoint2i( long, long );
122 void endmap2f( void );
124 void bgnline( void );
125 void endline( void );
126 void bgnclosedline( void );
127 void endclosedline( void );
128 void bgntmesh( void );
129 void swaptmesh( void );
130 void endtmesh( void );
131 void bgnqstrip( void );
132 void endqstrip( void );
134 void bgntfan( void );
135 void endtfan( void );
136 void evalUStrip(int n_upper
, REAL v_upper
, REAL
* upper_val
,
137 int n_lower
, REAL v_lower
, REAL
* lower_val
);
138 void evalVStrip(int n_left
, REAL u_left
, REAL
* left_val
,
139 int n_right
, REAL u_right
, REAL
* right_val
);
141 void coord2f( REAL
, REAL
);
142 void point2i( long, long );
144 void newtmeshvert( REAL
, REAL
);
145 void newtmeshvert( long, long );
148 void putCallBack(GLenum which
, void (APIENTRY
*fn
)() );
150 void putCallBack(GLenum which
, _GLUfuncptr fn
);
153 int get_vertices_call_back()
155 return output_triangles
;
157 void put_vertices_call_back(int flag
)
159 output_triangles
= flag
;
162 void put_callback_auto_normal(int flag
)
164 callback_auto_normal
= flag
;
167 int get_callback_auto_normal()
169 return callback_auto_normal
;
172 void set_callback_userData(void* data
)
177 /**************begin for LOD_eval_list***********/
178 void LOD_eval_list(int level
);
184 StoredVertex
*vertexCache
[VERTEX_CACHE_SIZE
];
189 GLint gl_polygon_mode
[2];/*to save and restore so that
192 bezierPatchMesh
*global_bpm
; //for output triangles
193 int output_triangles
; //true 1 or false 0
197 void (GLAPIENTRY
*beginCallBackN
) (GLenum type
);
198 void (GLAPIENTRY
*endCallBackN
) (void);
199 void (GLAPIENTRY
*vertexCallBackN
) (const GLfloat
*vert
);
200 void (GLAPIENTRY
*normalCallBackN
) (const GLfloat
*normal
);
201 void (GLAPIENTRY
*colorCallBackN
) (const GLfloat
*color
);
202 void (GLAPIENTRY
*texcoordCallBackN
) (const GLfloat
*texcoord
);
204 void (GLAPIENTRY
*beginCallBackData
) (GLenum type
, void* data
);
205 void (GLAPIENTRY
*endCallBackData
) (void* data
);
206 void (GLAPIENTRY
*vertexCallBackData
) (const GLfloat
*vert
, void* data
);
207 void (GLAPIENTRY
*normalCallBackData
) (const GLfloat
*normal
, void* data
);
208 void (GLAPIENTRY
*colorCallBackData
) (const GLfloat
*color
, void* data
);
209 void (GLAPIENTRY
*texcoordCallBackData
) (const GLfloat
*texcoord
, void* data
);
211 void beginCallBack (GLenum type
, void* data
);
212 void endCallBack (void* data
);
213 void vertexCallBack (const GLfloat
*vert
, void* data
);
214 void normalCallBack (const GLfloat
*normal
, void* data
);
215 void colorCallBack (const GLfloat
*color
, void* data
);
216 void texcoordCallBack (const GLfloat
*texcoord
, void* data
);
219 void* userData
; //the opaque pointer for Data callback functions.
222 void LOD_triangle(REAL A
[2], REAL B
[2], REAL C
[2],
224 void LOD_eval(int num_vert
, REAL
* verts
, int type
, int level
);
226 int LOD_eval_level
; //set by LOD_eval_list()
228 /*************begin for internal evaluators*****************/
230 /*the following global variables are only defined in this file.
231 *They are used to cache the precomputed Bezier polynomial values.
232 *These calues may be used consecutively in which case we don't have
233 *recompute these values again.
235 int global_uorder
; /*store the uorder in the previous evaluation*/
236 int global_vorder
; /*store the vorder in the previous evaluation*/
239 REAL global_vprime_BV
;
240 REAL global_uprime_BU
;
241 int global_uorder_BV
; /*store the uorder in the previous evaluation*/
242 int global_vorder_BV
; /*store the vorder in the previous evaluation*/
243 int global_uorder_BU
; /*store the uorder in the previous evaluation*/
244 int global_vorder_BU
; /*store the vorder in the previous evaluation*/
246 REAL global_ucoeff
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial values*/
247 REAL global_vcoeff
[IN_MAX_BEZIER_ORDER
];
248 REAL global_ucoeffDeriv
[IN_MAX_BEZIER_ORDER
]; /*cache the polynomial derivatives*/
249 REAL global_vcoeffDeriv
[IN_MAX_BEZIER_ORDER
];
251 REAL global_BV
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
252 REAL global_PBV
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
253 REAL global_BU
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
254 REAL global_PBU
[IN_MAX_BEZIER_ORDER
][IN_MAX_DIMENSION
];
255 REAL
* global_baseData
;
257 int global_ev_k
; /*the dimension*/
260 int global_ev_ustride
;
261 int global_ev_uorder
;
264 int global_ev_vstride
;
265 int global_ev_vorder
;
266 REAL global_ev_ctlPoints
[IN_MAX_BEZIER_ORDER
*IN_MAX_BEZIER_ORDER
*IN_MAX_DIMENSION
];
276 void inDoDomain2WithDerivs(int k
, REAL u
, REAL v
,
277 REAL u1
, REAL u2
, int uorder
,
278 REAL v1
, REAL v2
, int vorder
,
280 REAL
*retPoint
, REAL
*retdu
, REAL
*retdv
);
281 void inPreEvaluate(int order
, REAL vprime
, REAL
*coeff
);
282 void inPreEvaluateWithDeriv(int order
, REAL vprime
, REAL
*coeff
, REAL
*coeffDeriv
);
283 void inComputeFirstPartials(REAL
*p
, REAL
*pu
, REAL
*pv
);
284 void inComputeNormal2(REAL
*pu
, REAL
*pv
, REAL
*n
);
285 void inDoEvalCoord2(REAL u
, REAL v
,
286 REAL
*retPoint
, REAL
*retNormal
);
287 void inDoEvalCoord2NOGE(REAL u
, REAL v
,
288 REAL
*retPoint
, REAL
*retNormal
);
300 void inMapGrid2f(int nu
, REAL u0
, REAL u1
,
301 int nv
, REAL v0
, REAL v1
);
303 void inEvalMesh2(int lowU
, int lowV
, int highU
, int highV
);
304 void inEvalPoint2(int i
, int j
);
305 void inEvalCoord2f(REAL u
, REAL v
);
307 void inEvalULine(int n_points
, REAL v
, REAL
* u_vals
,
308 int stride
, REAL ret_points
[][3], REAL ret_normals
[][3]);
310 void inEvalVLine(int n_points
, REAL u
, REAL
* v_vals
,
311 int stride
, REAL ret_points
[][3], REAL ret_normals
[][3]);
313 void inEvalUStrip(int n_upper
, REAL v_upper
, REAL
* upper_val
,
314 int n_lower
, REAL v_lower
, REAL
* lower_val
316 void inEvalVStrip(int n_left
, REAL u_left
, REAL
* left_val
, int n_right
, REAL u_right
, REAL
* right_val
);
318 void inPreEvaluateBV(int k
, int uorder
, int vorder
, REAL vprime
, REAL
*baseData
);
319 void inPreEvaluateBU(int k
, int uorder
, int vorder
, REAL uprime
, REAL
*baseData
);
320 void inPreEvaluateBV_intfac(REAL v
)
322 inPreEvaluateBV(global_ev_k
, global_ev_uorder
, global_ev_vorder
, (v
-global_ev_v1
)/(global_ev_v2
-global_ev_v1
), global_ev_ctlPoints
);
325 void inPreEvaluateBU_intfac(REAL u
)
327 inPreEvaluateBU(global_ev_k
, global_ev_uorder
, global_ev_vorder
, (u
-global_ev_u1
)/(global_ev_u2
-global_ev_u1
), global_ev_ctlPoints
);
330 void inDoDomain2WithDerivsBV(int k
, REAL u
, REAL v
,
331 REAL u1
, REAL u2
, int uorder
,
332 REAL v1
, REAL v2
, int vorder
,
334 REAL
*retPoint
, REAL
* retdu
, REAL
*retdv
);
336 void inDoDomain2WithDerivsBU(int k
, REAL u
, REAL v
,
337 REAL u1
, REAL u2
, int uorder
,
338 REAL v1
, REAL v2
, int vorder
,
340 REAL
*retPoint
, REAL
* retdu
, REAL
*retdv
);
343 void inDoEvalCoord2NOGE_BV(REAL u
, REAL v
,
344 REAL
*retPoint
, REAL
*retNormal
);
346 void inDoEvalCoord2NOGE_BU(REAL u
, REAL v
,
347 REAL
*retPoint
, REAL
*retNormal
);
349 void inBPMEval(bezierPatchMesh
* bpm
);
350 void inBPMListEval(bezierPatchMesh
* list
);
352 /*-------------begin for surfEvalMachine -------------*/
353 surfEvalMachine em_vertex
;
354 surfEvalMachine em_normal
;
355 surfEvalMachine em_color
;
356 surfEvalMachine em_texcoord
;
358 int auto_normal_flag
; //whether to output normla or not in callback
359 //determined by GL_AUTO_NORMAL and callback_auto_normal
360 int callback_auto_normal
; //GLU_CALLBACK_AUTO_NORMAL_EXT
366 void inMap2fEM(int which
, //0:vert,1:norm,2:color,3:tex
378 void inDoDomain2WithDerivsEM(surfEvalMachine
*em
, REAL u
, REAL v
,
379 REAL
*retPoint
, REAL
*retdu
, REAL
*retdv
);
380 void inDoDomain2EM(surfEvalMachine
*em
, REAL u
, REAL v
,
382 void inDoEvalCoord2EM(REAL u
, REAL v
);
384 void inBPMEvalEM(bezierPatchMesh
* bpm
);
385 void inBPMListEvalEM(bezierPatchMesh
* list
);
387 /*-------------end for surfEvalMachine -------------*/
390 /*************end for internal evaluators*****************/
394 inline void StoredVertex::invoke(OpenGLSurfaceEvaluator
*eval
)
398 eval
->coord2f(coord
[0], coord
[1]);
401 eval
->point2i(point
[0], point
[1]);
408 #endif /* __gluglsurfeval_h_ */