void GLQuadRenderer::render(const Group& group)
{
if (!prepareBuffers(group))
return;
float oldModelView[16];
for (int i = 0; i < 16; ++i)
oldModelView[i] = modelView[i];
glGetFloatv(GL_MODELVIEW_MATRIX,modelView);
for (int i = 0; i < 16; ++i)
if (oldModelView[i] != modelView[i])
{
invertModelView();
break;
}
initBlending();
initRenderingHints();
glShadeModel(GL_FLAT);
switch(texturingMode)
{
case TEXTURE_2D :
if (getTexture3DGLExt() == SUPPORTED)
glDisable(GL_TEXTURE_3D);
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D,textureIndex);
glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,getTextureBlending());
if (!group.getModel()->isEnabled(PARAM_TEXTURE_INDEX))
{
if (!group.getModel()->isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render2D;
else
renderParticle = &GLQuadRenderer::render2DRot;
}
else
{
if (!group.getModel()->isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render2DAtlas;
else
renderParticle = &GLQuadRenderer::render2DAtlasRot;
}
break;
case TEXTURE_3D :
glDisable(GL_TEXTURE_2D);
glEnable(GL_TEXTURE_3D);
glBindTexture(GL_TEXTURE_3D,textureIndex);
glTexEnvi(GL_TEXTURE_ENV,GL_TEXTURE_ENV_MODE,getTextureBlending());
if (!group.getModel()->isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render3D;
else
renderParticle = &GLQuadRenderer::render3DRot;
break;
case TEXTURE_NONE :
glDisable(GL_TEXTURE_2D);
if (getTexture3DGLExt() == SUPPORTED)
glDisable(GL_TEXTURE_3D);
if (!group.getModel()->isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render2D;
else
renderParticle = &GLQuadRenderer::render2DRot;
break;
}
bool globalOrientation = precomputeOrientation3D(
group,
Vector3D(-invModelView[8],-invModelView[9],-invModelView[10]),
Vector3D(invModelView[4],invModelView[5],invModelView[6]),
Vector3D(invModelView[12],invModelView[13],invModelView[14]));
if (globalOrientation)
{
computeGlobalOrientation3D();
for (size_t i = 0; i < group.getNbParticles(); ++i)
(this->*renderParticle)(group.getParticle(i));
}
else
{
for (size_t i = 0; i < group.getNbParticles(); ++i)
{
const Particle& particle = group.getParticle(i);
computeSingleOrientation3D(particle);
(this->*renderParticle)(particle);
}
}
glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);
if (texturingMode == TEXTURE_2D)
{
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(2,GL_FLOAT,0,textureBuffer);
}
else if (texturingMode == TEXTURE_3D)
{
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glTexCoordPointer(3,GL_FLOAT,0,textureBuffer);
}
// interleaves vertex and color data
glVertexPointer(3,GL_FLOAT,7 * sizeof(float),gpuBuffer);
glColorPointer(4,GL_FLOAT,7 * sizeof(float),gpuBuffer + 3);
glDrawArrays(GL_QUADS,0,group.getNbParticles() << 2);
glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
if (texturingMode != TEXTURE_NONE)
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
}
void GLQuadRenderer::render(const Group& group,const DataSet* dataSet,RenderBuffer* renderBuffer) const
{
SPK_ASSERT(renderBuffer != NULL,"GLQuadRenderer::render(const Group&,const DataSet*,RenderBuffer*) - renderBuffer must not be NULL");
GLBuffer& buffer = static_cast<GLBuffer&>(*renderBuffer);
buffer.positionAtStart(); // Repositions all the buffers at the start
float oldModelView[16];
for (int i = 0; i < 16; ++i)
oldModelView[i] = modelView[i];
glGetFloatv(GL_MODELVIEW_MATRIX,modelView);
for (int i = 0; i < 16; ++i)
if (oldModelView[i] != modelView[i])
{
invertModelView();
break;
}
initBlending();
initRenderingOptions();
glShadeModel(GL_FLAT);
switch(texturingMode)
{
case TEXTURE_MODE_2D :
// Creates and inits the 2D TexCoord buffer if necessary
if (buffer.getNbTexCoords() != 2)
{
buffer.setNbTexCoords(2);
if (!group.isEnabled(PARAM_TEXTURE_INDEX))
{
float t[8] = {1.0f,0.0f,0.0f,0.0f,0.0f,1.0f,1.0f,1.0f};
for (size_t i = 0; i < group.getCapacity() << 3; ++i)
buffer.setNextTexCoord(t[i & 7]);
}
}
// Binds the texture
#ifndef SPK_GL_NO_EXT
if (SPK_GL_CHECK_EXTENSION(SPK_GL_TEXTURE_3D_EXT))
glDisable(GL_TEXTURE_3D_EXT);
#endif
glEnable(GL_TEXTURE_2D);
glBindTexture(GL_TEXTURE_2D,textureIndex);
// Selects the correct function
if (!group.isEnabled(PARAM_TEXTURE_INDEX))
{
if (!group.isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render2D;
else
renderParticle = &GLQuadRenderer::render2DRot;
}
else
{
if (!group.isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render2DAtlas;
else
renderParticle = &GLQuadRenderer::render2DAtlasRot;
}
break;
case TEXTURE_MODE_3D :
// Creates and inits the 3D TexCoord buffer if necessery
if (buffer.getNbTexCoords() != 3)
{
buffer.setNbTexCoords(3);
float t[12] = {1.0f,0.0f,0.0f,0.0f,0.0f,0.0f,0.0f,1.0f,0.0f,1.0f,1.0f,0.0f};
for (size_t i = 0; i < group.getCapacity() * 12; ++i)
buffer.setNextTexCoord(t[i % 12]);
}
// Binds the texture
glDisable(GL_TEXTURE_2D);
#ifndef SPK_GL_NO_EXT
glEnable(GL_TEXTURE_3D_EXT);
glBindTexture(GL_TEXTURE_3D_EXT,textureIndex);
#endif
// Selects the correct function
if (!group.isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render3D;
else
renderParticle = &GLQuadRenderer::render3DRot;
break;
case TEXTURE_MODE_NONE :
if (buffer.getNbTexCoords() != 0)
buffer.setNbTexCoords(0);
glDisable(GL_TEXTURE_2D);
// Selects the correct function
#ifndef SPK_GL_NO_EXT
if (SPK_GL_CHECK_EXTENSION(SPK_GL_TEXTURE_3D_EXT))
glDisable(GL_TEXTURE_3D_EXT);
#endif
if (!group.isEnabled(PARAM_ANGLE))
renderParticle = &GLQuadRenderer::render2D;
else
renderParticle = &GLQuadRenderer::render2DRot;
break;
}
bool globalOrientation = precomputeOrientation3D(
group,
Vector3D(-invModelView[8],-invModelView[9],-invModelView[10]),
Vector3D(invModelView[4],invModelView[5],invModelView[6]),
Vector3D(invModelView[12],invModelView[13],invModelView[14]));
// Fills the buffers
if (globalOrientation)
{
computeGlobalOrientation3D(group);
for (ConstGroupIterator particleIt(group); !particleIt.end(); ++particleIt)
(this->*renderParticle)(*particleIt,buffer);
}
else
{
for (ConstGroupIterator particleIt(group); !particleIt.end(); ++particleIt)
{
computeSingleOrientation3D(*particleIt);
(this->*renderParticle)(*particleIt,buffer);
}
}
buffer.render(GL_QUADS,group.getNbParticles() << 2);
}
