Source/System/NodeCores/Groups/Effects/DeferredShading/OSGDSLightChunk.cpp

   1 /*---------------------------------------------------------------------------*\
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   5  *               Copyright (C) 2000-2006 by the OpenSG Forum                 *
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  28 \*---------------------------------------------------------------------------*/
  29 /*---------------------------------------------------------------------------*\
  30  *                                Changes                                    *
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  37 \*---------------------------------------------------------------------------*/
  38
  39 //---------------------------------------------------------------------------
  40 //  Includes
  41 //---------------------------------------------------------------------------
  42
  43 #include <cstdlib>
  44 #include <cstdio>
  45
  46 #include "OSGConfig.h"
  47
  48 #include "OSGDSLightChunk.h"
  49
  50 #include "OSGGL.h"
  51 #include "OSGGLU.h"
  52
  53 #include "OSGDrawEnv.h"
  54
  55 OSG_BEGIN_NAMESPACE
  56
  57 // Documentation for this class is emitted in the
  58 // OSGDSLightChunkBase.cpp file.
  59 // To modify it, please change the .fcd file (OSGDSLightChunk.fcd) and
  60 // regenerate the base file.
  61
  62 /***************************************************************************\
  63  *                           Class variables                               *
  64 \***************************************************************************/
  65
  66 StateChunkClass DSLightChunk::_class("DSLight", 1, 170);
  67
  68 /***************************************************************************\
  69  *                           Class methods                                 *
  70 \***************************************************************************/
  71
  72 void DSLightChunk::initMethod(InitPhase ePhase)
  73 {
  74     Inherited::initMethod(ePhase);
  75
  76     if(ePhase == TypeObject::SystemPost)
  77     {
  78     }
  79 }
  80
  81
  82 /***************************************************************************\
  83  *                           Instance methods                              *
  84 \***************************************************************************/
  85
  86 /*-------------------------------------------------------------------------*\
  87  -  private                                                                 -
  88 \*-------------------------------------------------------------------------*/
  89
  90 /*----------------------- constructors & destructors ----------------------*/
  91
  92 DSLightChunk::DSLightChunk(void) :
  93     Inherited()
  94 {
  95 }
  96
  97 DSLightChunk::DSLightChunk(const DSLightChunk &source) :
  98     Inherited(source)
  99 {
 100 }
 101
 102 DSLightChunk::~DSLightChunk(void)
 103 {
 104 }
 105
 106 /*----------------------------- class specific ----------------------------*/
 107
 108 const StateChunkClass *DSLightChunk::getClass(void) const
 109 {
 110     return &_class;
 111 }
 112
 113 void DSLightChunk::changed(ConstFieldMaskArg whichField,
 114                             UInt32            origin,
 115                             BitVector         details)
 116 {
 117     Inherited::changed(whichField, origin, details);
 118 }
 119
 120 void DSLightChunk::dump(      UInt32    ,
 121                          const BitVector ) const
 122 {
 123     SLOG << "Dump DSLightChunk NI" << std::endl;
 124 }
 125
 126 /*--------------------------------- State --------------------------------*/
 127
 128 void DSLightChunk::activate(DrawEnv *drawEnv, UInt32 index)
 129 {
 130     glErr("dslight:activate:precheck");
 131
 132     Matrix matMV;
 133     calcModelView(drawEnv, matMV);
 134
 135     glPushMatrix();
 136     glLoadMatrixf(matMV.getValues());
 137
 138     glLightfv( GL_LIGHT0 + index,
 139                GL_DIFFUSE,
 140               _sfDiffuse.getValue().getValuesRGBA());
 141
 142     glLightfv( GL_LIGHT0 + index,
 143                GL_AMBIENT,
 144               _sfAmbient.getValue().getValuesRGBA());
 145
 146     glLightfv( GL_LIGHT0 + index,
 147                GL_SPECULAR,
 148               _sfSpecular.getValue().getValuesRGBA());
 149     glLightfv( GL_LIGHT0 + index,
 150                GL_POSITION,
 151               _sfPosition.getValue().getValues());
 152
 153     glLightf ( GL_LIGHT0 + index,
 154                GL_CONSTANT_ATTENUATION,
 155               _sfConstantAttenuation.getValue());
 156
 157     glLightf ( GL_LIGHT0 + index,
 158                GL_LINEAR_ATTENUATION,
 159               _sfLinearAttenuation.getValue());
 160
 161     glLightf ( GL_LIGHT0 + index,
 162                GL_QUADRATIC_ATTENUATION,
 163               _sfQuadraticAttenuation.getValue());
 164
 165     glLightf( GL_LIGHT0 + index,
 166               GL_SPOT_CUTOFF,
 167              _sfCutoff.getValue());
 168
 169     if(_sfCutoff.getValue() < 180.f)
 170     {
 171         glLightfv( GL_LIGHT0 + index,
 172                    GL_SPOT_DIRECTION,
 173                   _sfDirection.getValue().getValues());
 174
 175         glLightf( GL_LIGHT0 + index,
 176                   GL_SPOT_EXPONENT,
 177                  _sfExponent.getValue());
 178     }
 179
 180     glEnable(GL_LIGHT0 + index);
 181
 182     glPopMatrix();
 183
 184     glErr("dslight:activate:postcheck");
 185 }
 186
 187 void DSLightChunk::changeFrom(DrawEnv *drawEnv, StateChunk *old, UInt32 index)
 188 {
 189     glErr("dslight:change:precheck");
 190
 191     const DSLightChunk *oldChunk = dynamic_cast<const DSLightChunk *>(old);
 192
 193     // change from me to me?
 194     // this assumes I haven't changed in the meantime. is that a valid
 195     // assumption?
 196
 197     if(oldChunk == this)
 198         return;
 199
 200     Matrix matMV;
 201     calcModelView(drawEnv, matMV);
 202
 203     glPushMatrix();
 204     glLoadMatrixf(matMV.getValues());
 205
 206     // it could theoretically be more efficient to turn the light off before
 207     // changing its parameters, have to try that sometime
 208
 209     glLightfv( GL_LIGHT0 + index,
 210                GL_DIFFUSE,
 211               _sfDiffuse.getValue().getValuesRGBA());
 212
 213     glLightfv( GL_LIGHT0 + index,
 214                GL_AMBIENT,
 215               _sfAmbient.getValue().getValuesRGBA());
 216
 217     glLightfv( GL_LIGHT0 + index,
 218                GL_SPECULAR,
 219               _sfSpecular.getValue().getValuesRGBA());
 220
 221     glLightfv( GL_LIGHT0 + index,
 222                GL_POSITION,
 223               _sfPosition.getValue().getValues());
 224
 225     glLightf ( GL_LIGHT0 + index,
 226                GL_CONSTANT_ATTENUATION,
 227               _sfConstantAttenuation.getValue());
 228
 229     glLightf ( GL_LIGHT0 + index,
 230                GL_LINEAR_ATTENUATION,
 231               _sfLinearAttenuation.getValue());
 232
 233     glLightf ( GL_LIGHT0 + index,
 234                GL_QUADRATIC_ATTENUATION,
 235               _sfQuadraticAttenuation.getValue());
 236
 237     glLightf( GL_LIGHT0 + index,
 238               GL_SPOT_CUTOFF,
 239              _sfCutoff.getValue());
 240
 241     if(_sfCutoff.getValue() < 180.f)
 242     {
 243         glLightfv( GL_LIGHT0 + index,
 244                    GL_SPOT_DIRECTION,
 245                   _sfDirection.getValue().getValues());
 246
 247         glLightf( GL_LIGHT0 + index,
 248                   GL_SPOT_EXPONENT,
 249                  _sfExponent.getValue());
 250     }
 251
 252     glPopMatrix();
 253
 254     glErr("dslight:change:postcheck");
 255 }
 256
 257 void DSLightChunk::deactivate(DrawEnv *drawEnv, UInt32 index)
 258 {
 259     glDisable(GL_LIGHT0 + index);
 260 }
 261
 262 /*-------------------------- Comparison -----------------------------------*/
 263
 264 Real32 DSLightChunk::switchCost(StateChunk *OSG_CHECK_ARG(chunk))
 265 {
 266     return 0;
 267 }
 268
 269 bool DSLightChunk::operator < (const StateChunk &other) const
 270 {
 271     return this < &other;
 272 }
 273
 274 bool DSLightChunk::operator == (const StateChunk &other) const
 275 {
 276     const DSLightChunk *tother = dynamic_cast<const DSLightChunk *>(&other);
 277
 278     if(!tother)
 279         return false;
 280
 281     if(tother == this)
 282         return true;
 283
 284     if(!getAmbient  ().equals(tother->getAmbient  (),
 285                               TypeTraits<Real32>::getDefaultEps()) ||
 286        !getDiffuse  ().equals(tother->getDiffuse  (),
 287                               TypeTraits<Real32>::getDefaultEps()) ||
 288        !getSpecular ().equals(tother->getSpecular (),
 289                               TypeTraits<Real32>::getDefaultEps()) ||
 290        !getPosition ().equals(tother->getPosition (),
 291                               TypeTraits<Real32>::getDefaultEps()) ||
 292        !getDirection().equals(tother->getDirection(),
 293                               TypeTraits<Real32>::getDefaultEps()) ||
 294
 295         getConstantAttenuation () != tother->getConstantAttenuation () ||
 296         getLinearAttenuation   () != tother->getLinearAttenuation   () ||
 297         getQuadraticAttenuation() != tother->getQuadraticAttenuation() ||
 298         getCutoff              () != tother->getCutoff              () ||
 299         getExponent            () != tother->getExponent            ()
 300       )
 301     {
 302         return false;
 303     }
 304
 305     return true;
 306 }
 307
 308 bool DSLightChunk::operator != (const StateChunk &other) const
 309 {
 310     return ! (*this == other);
 311 }
 312
 313 /*-------------------------------- Helper --------------------------------*/
 314
 315 void DSLightChunk::calcModelView(DrawEnv *drawEnv, Matrix &result)
 316 {
 317     result = drawEnv->getVPCameraViewing();
 318
 319     Matrix toWorld;
 320
 321     if(_sfBeacon.getValue() != NULL)
 322     {
 323         _sfBeacon.getValue()->getToWorld(toWorld);
 324     }
 325     else
 326     {
 327         toWorld.setIdentity();
 328     }
 329
 330     result.mult(toWorld);
 331 }
 332
 333 OSG_END_NAMESPACE