//-----------------------------------------------------------------------
void ParticleRenderer::_createSoftMaterial(void)
{
Ogre::String newMaterialName = SOFT_PREFIX + mParentTechnique->getMaterialName();
if (!Ogre::MaterialManager::getSingletonPtr()->getByName(newMaterialName).isNull())
{
mParentTechnique->setMaterialName(newMaterialName);
return;
}
// Create a new material for soft particles
if (mUseSoftParticles && mNotifiedDepthMap)
{
// Create Vertex program
Ogre::String softVertexName = "ParticleUniverse_SoftVP"; // Use ParticleUniverse_ to avoid name conflicts.
Ogre::HighLevelGpuProgramPtr vertexProgram = Ogre::HighLevelGpuProgramManager::getSingleton().createProgram(
softVertexName,
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
"hlsl",
Ogre::GPT_VERTEX_PROGRAM);
vertexProgram->setSourceFile("pu_soft_sm20.hlsl");
vertexProgram->setParameter("target", "vs_2_0");
vertexProgram->setParameter("entry_point", "mainVP"); // Must be same name as in pu_soft_sm20.hlsl
vertexProgram->load();
Ogre::String softFragmentName = "ParticleUniverse_SoftFP"; // Use ParticleUniverse_ to avoid name conflicts.
Ogre::HighLevelGpuProgramPtr fragmentProgram = Ogre::HighLevelGpuProgramManager::getSingleton().createProgram(
softFragmentName,
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME,
"hlsl",
Ogre::GPT_FRAGMENT_PROGRAM);
fragmentProgram->setSourceFile("pu_soft_sm20.hlsl");
fragmentProgram->setParameter("target", "ps_2_0");
fragmentProgram->setParameter("entry_point", "mainFP"); // Must be same name as in pu_soft_sm20.hlsl
fragmentProgram->load();
Ogre::String resourceGroupName = mParentTechnique->getParentSystem() ?
mParentTechnique->getParentSystem()->getResourceGroupName() :
Ogre::ResourceGroupManager::DEFAULT_RESOURCE_GROUP_NAME;
// Create material with depth texture
Ogre::MaterialPtr newMaterial = Ogre::MaterialManager::getSingleton().getByName(newMaterialName);
if (!newMaterial.getPointer())
{
newMaterial = Ogre::MaterialManager::getSingleton().create(newMaterialName, resourceGroupName);
Ogre::Pass* newPass = newMaterial->getTechnique(0)->getPass(0);
newPass->setDepthCheckEnabled(true);
newPass->setDepthWriteEnabled(false);
newPass->setSceneBlending(Ogre::SBT_TRANSPARENT_ALPHA);
newPass->createTextureUnitState(ParticleSystemManager::getSingleton().getDepthTextureName());
// Get the first texture from the old material (assume it has at least 1 technique and one pass)
Ogre::Pass* oldPass = mParentTechnique->getMaterial()->getBestTechnique()->getPass(0);
newPass->setLightingEnabled(oldPass->getLightingEnabled());
if (oldPass->getNumTextureUnitStates() > 0)
{
Ogre::TextureUnitState* oldTextureUnitState = oldPass->getTextureUnitState(0);
newPass->createTextureUnitState(oldTextureUnitState->getTextureName());
}
// Set the vertex and fragment parameters
newPass->setVertexProgram(softVertexName);
newPass->setFragmentProgram(softFragmentName);
Ogre::GpuProgramParametersSharedPtr vertexParams = newPass->getVertexProgramParameters();
vertexParams->setNamedAutoConstant("worldViewProj", Ogre::GpuProgramParameters::ACT_WORLDVIEWPROJ_MATRIX);
vertexParams->setNamedAutoConstant("depthRange", Ogre::GpuProgramParameters::ACT_SCENE_DEPTH_RANGE);
// Depth scale must be the same as used in creation of the depth map
vertexParams->setNamedConstant("depthScale", ParticleSystemManager::getSingleton().getDepthScale());
Ogre::GpuProgramParametersSharedPtr fragmentParams = newPass->getFragmentProgramParameters();
fragmentParams->setNamedConstant("contrastPower", mSoftParticlesContrastPower);
fragmentParams->setNamedConstant("scale", mSoftParticlesScale);
fragmentParams->setNamedConstant("delta", mSoftParticlesDelta);
}
// Set the new material
mParentTechnique->setMaterialName(newMaterialName);
}
}
