/usr/include/osg/TriangleFunctor is in libopenscenegraph-3.4-dev 3.4.1+dfsg1-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 | /* -*-c++-*- OpenSceneGraph - Copyright (C) 1998-2006 Robert Osfield
*
* This library is open source and may be redistributed and/or modified under
* the terms of the OpenSceneGraph Public License (OSGPL) version 0.0 or
* (at your option) any later version. The full license is in LICENSE file
* included with this distribution, and on the openscenegraph.org website.
*
* 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
* OpenSceneGraph Public License for more details.
*/
#ifndef OSG_TRIANGLEFUNCTOR
#define OSG_TRIANGLEFUNCTOR 1
#include <osg/PrimitiveSet>
#include <osg/Notify>
namespace osg {
/** Provides access to the triangles that compose an \c osg::Drawable. If the \c
* Drawable is not composed of triangles, the \c TriangleFunctor will convert
* the primitives to triangles whenever possible.
* <p>Notice that \c TriangleFunctor is a class template, and that it inherits
* from its template parameter \c T. This template parameter must implement
* <tt>T::operator() (const osg::Vec3 v1, const osg::Vec3 v2, const osg::Vec3
* v3, bool treatVertexDataAsTemporary)</tt>, which will be called for every
* triangle when the functor is applied to a \c Drawable. Parameters \c v1, \c
* v2, and \c v3 are the triangle vertices. The fourth parameter, \c
* treatVertexDataAsTemporary, indicates whether these vertices are coming from
* a "real" vertex array, or from a temporary vertex array, created by the \c
* TriangleFunctor from some other geometry representation.
* @see \c PrimitiveFunctor for general usage hints.
*/
template<class T>
class TriangleFunctor : public PrimitiveFunctor, public T
{
public:
TriangleFunctor()
{
_vertexArraySize=0;
_vertexArrayPtr=0;
_modeCache=0;
_treatVertexDataAsTemporary=false;
}
virtual ~TriangleFunctor() {}
void setTreatVertexDataAsTemporary(bool treatVertexDataAsTemporary) { _treatVertexDataAsTemporary=treatVertexDataAsTemporary; }
bool getTreatVertexDataAsTemporary() const { return _treatVertexDataAsTemporary; }
virtual void setVertexArray(unsigned int,const Vec2*)
{
notify(WARN)<<"Triangle Functor does not support Vec2* vertex arrays"<<std::endl;
}
virtual void setVertexArray(unsigned int count,const Vec3* vertices)
{
_vertexArraySize = count;
_vertexArrayPtr = vertices;
}
virtual void setVertexArray(unsigned int,const Vec4* )
{
notify(WARN)<<"Triangle Functor does not support Vec4* vertex arrays"<<std::endl;
}
virtual void setVertexArray(unsigned int,const Vec2d*)
{
notify(WARN)<<"Triangle Functor does not support Vec2d* vertex arrays"<<std::endl;
}
virtual void setVertexArray(unsigned int,const Vec3d*)
{
notify(WARN)<<"Triangle Functor does not support Vec3d* vertex arrays"<<std::endl;
}
virtual void setVertexArray(unsigned int,const Vec4d* )
{
notify(WARN)<<"Triangle Functor does not support Vec4d* vertex arrays"<<std::endl;
}
virtual void drawArrays(GLenum mode,GLint first,GLsizei count)
{
if (_vertexArrayPtr==0 || count==0) return;
switch(mode)
{
case(GL_TRIANGLES):
{
const Vec3* vlast = &_vertexArrayPtr[first+count];
for(const Vec3* vptr=&_vertexArrayPtr[first];vptr<vlast;vptr+=3)
this->operator()(*(vptr),*(vptr+1),*(vptr+2),_treatVertexDataAsTemporary);
break;
}
case(GL_TRIANGLE_STRIP):
{
const Vec3* vptr = &_vertexArrayPtr[first];
for(GLsizei i=2;i<count;++i,++vptr)
{
if ((i%2)) this->operator()(*(vptr),*(vptr+2),*(vptr+1),_treatVertexDataAsTemporary);
else this->operator()(*(vptr),*(vptr+1),*(vptr+2),_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUADS):
{
const Vec3* vptr = &_vertexArrayPtr[first];
for(GLsizei i=3;i<count;i+=4,vptr+=4)
{
this->operator()(*(vptr),*(vptr+1),*(vptr+2),_treatVertexDataAsTemporary);
this->operator()(*(vptr),*(vptr+2),*(vptr+3),_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUAD_STRIP):
{
const Vec3* vptr = &_vertexArrayPtr[first];
for(GLsizei i=3;i<count;i+=2,vptr+=2)
{
this->operator()(*(vptr),*(vptr+1),*(vptr+2),_treatVertexDataAsTemporary);
this->operator()(*(vptr+1),*(vptr+3),*(vptr+2),_treatVertexDataAsTemporary);
}
break;
}
case(GL_POLYGON): // treat polygons as GL_TRIANGLE_FAN
case(GL_TRIANGLE_FAN):
{
const Vec3* vfirst = &_vertexArrayPtr[first];
const Vec3* vptr = vfirst+1;
for(GLsizei i=2;i<count;++i,++vptr)
{
this->operator()(*(vfirst),*(vptr),*(vptr+1),_treatVertexDataAsTemporary);
}
break;
}
case(GL_POINTS):
case(GL_LINES):
case(GL_LINE_STRIP):
case(GL_LINE_LOOP):
default:
// can't be converted into to triangles.
break;
}
}
virtual void drawElements(GLenum mode,GLsizei count,const GLubyte* indices)
{
if (indices==0 || count==0) return;
typedef const GLubyte* IndexPointer;
switch(mode)
{
case(GL_TRIANGLES):
{
IndexPointer ilast = &indices[count];
for(IndexPointer iptr=indices;iptr<ilast;iptr+=3)
this->operator()(_vertexArrayPtr[*iptr],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
break;
}
case(GL_TRIANGLE_STRIP):
{
IndexPointer iptr = indices;
for(GLsizei i=2;i<count;++i,++iptr)
{
if ((i%2)) this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+2)],_vertexArrayPtr[*(iptr+1)],_treatVertexDataAsTemporary);
else this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUADS):
{
IndexPointer iptr = indices;
for(GLsizei i=3;i<count;i+=4,iptr+=4)
{
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+2)],_vertexArrayPtr[*(iptr+3)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUAD_STRIP):
{
IndexPointer iptr = indices;
for(GLsizei i=3;i<count;i+=2,iptr+=2)
{
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
this->operator()(_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+3)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_POLYGON): // treat polygons as GL_TRIANGLE_FAN
case(GL_TRIANGLE_FAN):
{
IndexPointer iptr = indices;
const Vec3& vfirst = _vertexArrayPtr[*iptr];
++iptr;
for(GLsizei i=2;i<count;++i,++iptr)
{
this->operator()(vfirst,_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_POINTS):
case(GL_LINES):
case(GL_LINE_STRIP):
case(GL_LINE_LOOP):
default:
// can't be converted into to triangles.
break;
}
}
virtual void drawElements(GLenum mode,GLsizei count,const GLushort* indices)
{
if (indices==0 || count==0) return;
typedef const GLushort* IndexPointer;
switch(mode)
{
case(GL_TRIANGLES):
{
IndexPointer ilast = &indices[count];
for(IndexPointer iptr=indices;iptr<ilast;iptr+=3)
{
this->operator()(_vertexArrayPtr[*iptr],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_TRIANGLE_STRIP):
{
IndexPointer iptr = indices;
for(GLsizei i=2;i<count;++i,++iptr)
{
if ((i%2)) this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+2)],_vertexArrayPtr[*(iptr+1)],_treatVertexDataAsTemporary);
else this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUADS):
{
IndexPointer iptr = indices;
for(GLsizei i=3;i<count;i+=4,iptr+=4)
{
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+2)],_vertexArrayPtr[*(iptr+3)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUAD_STRIP):
{
IndexPointer iptr = indices;
for(GLsizei i=3;i<count;i+=2,iptr+=2)
{
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
this->operator()(_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+3)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_POLYGON): // treat polygons as GL_TRIANGLE_FAN
case(GL_TRIANGLE_FAN):
{
IndexPointer iptr = indices;
const Vec3& vfirst = _vertexArrayPtr[*iptr];
++iptr;
for(GLsizei i=2;i<count;++i,++iptr)
{
this->operator()(vfirst,_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_POINTS):
case(GL_LINES):
case(GL_LINE_STRIP):
case(GL_LINE_LOOP):
default:
// can't be converted into to triangles.
break;
}
}
virtual void drawElements(GLenum mode,GLsizei count,const GLuint* indices)
{
if (indices==0 || count==0) return;
typedef const GLuint* IndexPointer;
switch(mode)
{
case(GL_TRIANGLES):
{
IndexPointer ilast = &indices[count];
for(IndexPointer iptr=indices;iptr<ilast;iptr+=3)
this->operator()(_vertexArrayPtr[*iptr],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
break;
}
case(GL_TRIANGLE_STRIP):
{
IndexPointer iptr = indices;
for(GLsizei i=2;i<count;++i,++iptr)
{
if ((i%2)) this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+2)],_vertexArrayPtr[*(iptr+1)],_treatVertexDataAsTemporary);
else this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUADS):
{
IndexPointer iptr = indices;
for(GLsizei i=3;i<count;i+=4,iptr+=4)
{
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+2)],_vertexArrayPtr[*(iptr+3)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_QUAD_STRIP):
{
IndexPointer iptr = indices;
for(GLsizei i=3;i<count;i+=2,iptr+=2)
{
this->operator()(_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
this->operator()(_vertexArrayPtr[*(iptr+1)],_vertexArrayPtr[*(iptr+3)],_vertexArrayPtr[*(iptr+2)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_POLYGON): // treat polygons as GL_TRIANGLE_FAN
case(GL_TRIANGLE_FAN):
{
IndexPointer iptr = indices;
const Vec3& vfirst = _vertexArrayPtr[*iptr];
++iptr;
for(GLsizei i=2;i<count;++i,++iptr)
{
this->operator()(vfirst,_vertexArrayPtr[*(iptr)],_vertexArrayPtr[*(iptr+1)],_treatVertexDataAsTemporary);
}
break;
}
case(GL_POINTS):
case(GL_LINES):
case(GL_LINE_STRIP):
case(GL_LINE_LOOP):
default:
// can't be converted into to triangles.
break;
}
}
/** Note:
* begin(..),vertex(..) & end() are convenience methods for adapting
* non vertex array primitives to vertex array based primitives.
* This is done to simplify the implementation of primitive functor
* subclasses - users only need override drawArray and drawElements.
*/
virtual void begin(GLenum mode)
{
_modeCache = mode;
_vertexCache.clear();
}
virtual void vertex(const Vec2& vert) { _vertexCache.push_back(osg::Vec3(vert[0],vert[1],0.0f)); }
virtual void vertex(const Vec3& vert) { _vertexCache.push_back(vert); }
virtual void vertex(const Vec4& vert) { _vertexCache.push_back(osg::Vec3(vert[0],vert[1],vert[2])/vert[3]); }
virtual void vertex(float x,float y) { _vertexCache.push_back(osg::Vec3(x,y,0.0f)); }
virtual void vertex(float x,float y,float z) { _vertexCache.push_back(osg::Vec3(x,y,z)); }
virtual void vertex(float x,float y,float z,float w) { _vertexCache.push_back(osg::Vec3(x,y,z)/w); }
virtual void end()
{
if (!_vertexCache.empty())
{
setVertexArray(_vertexCache.size(),&_vertexCache.front());
_treatVertexDataAsTemporary = true;
drawArrays(_modeCache,0,_vertexCache.size());
}
}
protected:
unsigned int _vertexArraySize;
const Vec3* _vertexArrayPtr;
GLenum _modeCache;
};
}
#endif
|