FixedFunctionTechnique::FixedFunctionTechnique(const std::vector<TextureLayer>& layers,
const std::vector<osg::ref_ptr<osg::Texture2D> >& blendmaps, int blendmapScale, float layerTileSize)
{
bool firstLayer = true;
int i=0;
for (std::vector<TextureLayer>::const_iterator it = layers.begin(); it != layers.end(); ++it)
{
osg::ref_ptr<osg::StateSet> stateset (new osg::StateSet);
if (!firstLayer)
{
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
stateset->setAttributeAndModes(getEqualDepth(), osg::StateAttribute::ON);
}
int texunit = 0;
if(!firstLayer)
{
osg::ref_ptr<osg::Texture2D> blendmap = blendmaps.at(i++);
stateset->setTextureAttributeAndModes(texunit, blendmap.get());
// This is to map corner vertices directly to the center of a blendmap texel.
stateset->setTextureAttributeAndModes(texunit, getBlendmapTexMat(blendmapScale));
static osg::ref_ptr<osg::TexEnvCombine> texEnvCombine;
if (!texEnvCombine)
{
texEnvCombine = new osg::TexEnvCombine;
texEnvCombine->setCombine_RGB(osg::TexEnvCombine::REPLACE);
texEnvCombine->setSource0_RGB(osg::TexEnvCombine::PREVIOUS);
}
stateset->setTextureAttributeAndModes(texunit, texEnvCombine, osg::StateAttribute::ON);
++texunit;
}
// Add the actual layer texture multiplied by the alpha map.
osg::ref_ptr<osg::Texture2D> tex = it->mDiffuseMap;
stateset->setTextureAttributeAndModes(texunit, tex.get());
stateset->setTextureAttributeAndModes(texunit, getLayerTexMat(layerTileSize), osg::StateAttribute::ON);
firstLayer = false;
addPass(stateset);
}
}
std::vector<osg::ref_ptr<osg::StateSet> > createPasses(bool useShaders, bool forcePerPixelLighting, bool clampLighting, Shader::ShaderManager* shaderManager, const std::vector<TextureLayer> &layers,
const std::vector<osg::ref_ptr<osg::Texture2D> > &blendmaps, int blendmapScale, float layerTileSize)
{
std::vector<osg::ref_ptr<osg::StateSet> > passes;
bool firstLayer = true;
unsigned int blendmapIndex = 0;
unsigned int passIndex = 0;
for (std::vector<TextureLayer>::const_iterator it = layers.begin(); it != layers.end(); ++it)
{
osg::ref_ptr<osg::StateSet> stateset (new osg::StateSet);
if (!firstLayer)
{
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
stateset->setAttributeAndModes(getEqualDepth(), osg::StateAttribute::ON);
}
int texunit = 0;
if (useShaders)
{
stateset->setTextureAttributeAndModes(texunit, it->mDiffuseMap);
if (layerTileSize != 1.f)
stateset->setTextureAttributeAndModes(texunit, getLayerTexMat(layerTileSize), osg::StateAttribute::ON);
stateset->addUniform(new osg::Uniform("diffuseMap", texunit));
if(!firstLayer)
{
++texunit;
osg::ref_ptr<osg::Texture2D> blendmap = blendmaps.at(blendmapIndex++);
stateset->setTextureAttributeAndModes(texunit, blendmap.get());
stateset->setTextureAttributeAndModes(texunit, getBlendmapTexMat(blendmapScale));
stateset->addUniform(new osg::Uniform("blendMap", texunit));
}
if (it->mNormalMap)
{
++texunit;
stateset->setTextureAttributeAndModes(texunit, it->mNormalMap);
stateset->addUniform(new osg::Uniform("normalMap", texunit));
}
Shader::ShaderManager::DefineMap defineMap;
defineMap["forcePPL"] = forcePerPixelLighting ? "1" : "0";
defineMap["clamp"] = clampLighting ? "1" : "0";
defineMap["normalMap"] = (it->mNormalMap) ? "1" : "0";
defineMap["blendMap"] = !firstLayer ? "1" : "0";
defineMap["colorMode"] = "2";
defineMap["specularMap"] = it->mSpecular ? "1" : "0";
defineMap["parallax"] = (it->mNormalMap && it->mParallax) ? "1" : "0";
osg::ref_ptr<osg::Shader> vertexShader = shaderManager->getShader("terrain_vertex.glsl", defineMap, osg::Shader::VERTEX);
osg::ref_ptr<osg::Shader> fragmentShader = shaderManager->getShader("terrain_fragment.glsl", defineMap, osg::Shader::FRAGMENT);
if (!vertexShader || !fragmentShader)
{
// Try again without shader. Error already logged by above
return createPasses(false, forcePerPixelLighting, clampLighting, shaderManager, layers, blendmaps, blendmapScale, layerTileSize);
}
stateset->setAttributeAndModes(shaderManager->getProgram(vertexShader, fragmentShader));
}
else
{
if(!firstLayer)
{
osg::ref_ptr<osg::Texture2D> blendmap = blendmaps.at(blendmapIndex++);
stateset->setTextureAttributeAndModes(texunit, blendmap.get());
// This is to map corner vertices directly to the center of a blendmap texel.
stateset->setTextureAttributeAndModes(texunit, getBlendmapTexMat(blendmapScale));
static osg::ref_ptr<osg::TexEnvCombine> texEnvCombine;
if (!texEnvCombine)
{
texEnvCombine = new osg::TexEnvCombine;
texEnvCombine->setCombine_RGB(osg::TexEnvCombine::REPLACE);
texEnvCombine->setSource0_RGB(osg::TexEnvCombine::PREVIOUS);
}
stateset->setTextureAttributeAndModes(texunit, texEnvCombine, osg::StateAttribute::ON);
++texunit;
}
// Add the actual layer texture multiplied by the alpha map.
osg::ref_ptr<osg::Texture2D> tex = it->mDiffuseMap;
stateset->setTextureAttributeAndModes(texunit, tex.get());
if (layerTileSize != 1.f)
stateset->setTextureAttributeAndModes(texunit, getLayerTexMat(layerTileSize), osg::StateAttribute::ON);
}
firstLayer = false;
stateset->setRenderBinDetails(passIndex++, "RenderBin");
passes.push_back(stateset);
}
return passes;
}
ShaderTechnique::ShaderTechnique(Shader::ShaderManager& shaderManager, bool forcePerPixelLighting, bool clampLighting, const std::vector<TextureLayer>& layers,
const std::vector<osg::ref_ptr<osg::Texture2D> >& blendmaps, int blendmapScale, float layerTileSize)
{
bool firstLayer = true;
int i=0;
for (std::vector<TextureLayer>::const_iterator it = layers.begin(); it != layers.end(); ++it)
{
osg::ref_ptr<osg::StateSet> stateset (new osg::StateSet);
if (!firstLayer)
{
stateset->setMode(GL_BLEND, osg::StateAttribute::ON);
stateset->setAttributeAndModes(getEqualDepth(), osg::StateAttribute::ON);
}
int texunit = 0;
stateset->setTextureAttributeAndModes(texunit, it->mDiffuseMap);
stateset->setTextureAttributeAndModes(texunit, getLayerTexMat(layerTileSize), osg::StateAttribute::ON);
stateset->addUniform(new osg::Uniform("diffuseMap", texunit));
if(!firstLayer)
{
++texunit;
osg::ref_ptr<osg::Texture2D> blendmap = blendmaps.at(i++);
stateset->setTextureAttributeAndModes(texunit, blendmap.get());
stateset->setTextureAttributeAndModes(texunit, getBlendmapTexMat(blendmapScale));
stateset->addUniform(new osg::Uniform("blendMap", texunit));
}
if (it->mNormalMap)
{
++texunit;
stateset->setTextureAttributeAndModes(texunit, it->mNormalMap);
stateset->addUniform(new osg::Uniform("normalMap", texunit));
}
Shader::ShaderManager::DefineMap defineMap;
defineMap["forcePPL"] = forcePerPixelLighting ? "1" : "0";
defineMap["clamp"] = clampLighting ? "1" : "0";
defineMap["normalMap"] = (it->mNormalMap) ? "1" : "0";
defineMap["blendMap"] = !firstLayer ? "1" : "0";
defineMap["colorMode"] = "2";
defineMap["specularMap"] = it->mSpecular ? "1" : "0";
defineMap["parallax"] = (it->mNormalMap && it->mParallax) ? "1" : "0";
osg::ref_ptr<osg::Shader> vertexShader = shaderManager.getShader("terrain_vertex.glsl", defineMap, osg::Shader::VERTEX);
osg::ref_ptr<osg::Shader> fragmentShader = shaderManager.getShader("terrain_fragment.glsl", defineMap, osg::Shader::FRAGMENT);
if (!vertexShader || !fragmentShader)
throw std::runtime_error("Unable to create shader");
stateset->setAttributeAndModes(shaderManager.getProgram(vertexShader, fragmentShader));
firstLayer = false;
addPass(stateset);
}
}
