void SingleVolumeRaycaster::beforeProcess() {
VolumeRaycaster::beforeProcess();
// compile program if needed
if (getInvalidationLevel() >= Processor::INVALID_PROGRAM) {
PROFILING_BLOCK("compile");
compile();
}
LGL_ERROR;
transferFunc_.setVolumeHandle(volumeInport_.getData());
}
void SingleVolumeRaycaster::process() {
// bind transfer function
tgt::TextureUnit transferUnit;
transferUnit.activate();
LGL_ERROR;
ClassificationModes::bindTexture(classificationMode_.get(), transferFunc_.get(), getSamplingStepSize(volumeInport_.getData()));
portGroup_.activateTargets();
portGroup_.clearTargets();
LGL_ERROR;
// bind entry params
tgt::TextureUnit entryUnit, entryDepthUnit, exitUnit, exitDepthUnit;
entryPort_.bindTextures(entryUnit, entryDepthUnit);
LGL_ERROR;
// bind exit params
exitPort_.bindTextures(exitUnit, exitDepthUnit);
LGL_ERROR;
// vector containing the volumes to bind; is passed to bindVolumes()
std::vector<VolumeStruct> volumeTextures;
// add main volume
TextureUnit volUnit;
volumeTextures.push_back(VolumeStruct(
volumeInport_.getData(),
&volUnit,
"volume_","volumeStruct_",
volumeInport_.getTextureClampModeProperty().getValue(),
tgt::vec4(volumeInport_.getTextureBorderIntensityProperty().get()),
volumeInport_.getTextureFilterModeProperty().getValue())
);
// initialize shader
tgt::Shader* raycastPrg = shaderProp_.getShader();
raycastPrg->activate();
// set common uniforms used by all shaders
tgt::Camera cam = camera_.get();
setGlobalShaderParameters(raycastPrg, &cam);
// bind the volumes and pass the necessary information to the shader
bindVolumes(raycastPrg, volumeTextures, &cam, lightPosition_.get());
// pass the remaining uniforms to the shader
raycastPrg->setUniform("entryPoints_", entryUnit.getUnitNumber());
raycastPrg->setUniform("entryPointsDepth_", entryDepthUnit.getUnitNumber());
entryPort_.setTextureParameters(raycastPrg, "entryParameters_");
raycastPrg->setUniform("exitPoints_", exitUnit.getUnitNumber());
raycastPrg->setUniform("exitPointsDepth_", exitDepthUnit.getUnitNumber());
exitPort_.setTextureParameters(raycastPrg, "exitParameters_");
if (compositingMode_.isSelected("iso") ||
compositingMode1_.isSelected("iso") ||
compositingMode2_.isSelected("iso") )
raycastPrg->setUniform("isoValue_", isoValue_.get());
if (ClassificationModes::usesTransferFunction(classificationMode_.get()))
transferFunc_.get()->setUniform(raycastPrg, "transferFunc_", "transferFuncTex_", transferUnit.getUnitNumber());
if (compositingMode_.isSelected("mida"))
raycastPrg->setUniform("gammaValue_", gammaValue_.get());
if (compositingMode1_.isSelected("mida"))
raycastPrg->setUniform("gammaValue1_", gammaValue1_.get());
if (compositingMode2_.isSelected("mida"))
raycastPrg->setUniform("gammaValue2_", gammaValue2_.get());
LGL_ERROR;
{
PROFILING_BLOCK("raycasting");
renderQuad();
}
raycastPrg->deactivate();
portGroup_.deactivateTargets();
TextureUnit::setZeroUnit();
LGL_ERROR;
}
void SingleVolumeRaycaster::process() {
// bind transfer function
tgt::TextureUnit transferUnit;
transferUnit.activate();
LGL_ERROR;
if (transferFunc_.get())
transferFunc_.get()->bind();
portGroup_.activateTargets();
portGroup_.clearTargets();
LGL_ERROR;
// bind entry params
tgt::TextureUnit entryUnit, entryDepthUnit, exitUnit, exitDepthUnit;
entryPort_.bindTextures(entryUnit, entryDepthUnit);
LGL_ERROR;
// bind exit params
exitPort_.bindTextures(exitUnit, exitDepthUnit);
LGL_ERROR;
// vector containing the volumes to bind; is passed to bindVolumes()
std::vector<VolumeStruct> volumeTextures;
// add main volume
TextureUnit volUnit;
volumeTextures.push_back(VolumeStruct(
volumeInport_.getData()->getVolumeGL(),
&volUnit,
"volume_",
"volumeParameters_",
true,
texClampMode_.getValue(),
tgt::vec4(texBorderIntensity_.get()),
texFilterMode_.getValue())
);
updateBrickingParameters(volumeInport_.getData());
TextureUnit brickUnit1, brickUnit2;
addBrickedVolumeModalities(volumeInport_.getData(), volumeTextures, &brickUnit1, &brickUnit2);
// initialize shader
raycastPrg_->activate();
// set common uniforms used by all shaders
tgt::Camera cam = camera_.get();
setGlobalShaderParameters(raycastPrg_, &cam);
// bind the volumes and pass the necessary information to the shader
bindVolumes(raycastPrg_, volumeTextures, &cam, lightPosition_.get());
// pass the remaining uniforms to the shader
raycastPrg_->setUniform("entryPoints_", entryUnit.getUnitNumber());
raycastPrg_->setUniform("entryPointsDepth_", entryDepthUnit.getUnitNumber());
entryPort_.setTextureParameters(raycastPrg_, "entryParameters_");
raycastPrg_->setUniform("exitPoints_", exitUnit.getUnitNumber());
raycastPrg_->setUniform("exitPointsDepth_", exitDepthUnit.getUnitNumber());
exitPort_.setTextureParameters(raycastPrg_, "exitParameters_");
if (compositingMode_.isSelected("iso") ||
compositingMode1_.isSelected("iso") ||
compositingMode2_.isSelected("iso") )
raycastPrg_->setUniform("isoValue_", isoValue_.get());
if (classificationMode_.get() == "transfer-function")
raycastPrg_->setUniform("transferFunc_", transferUnit.getUnitNumber());
setBrickedVolumeUniforms(raycastPrg_, volumeInport_.getData());
LGL_ERROR;
{
PROFILING_BLOCK("raycasting");
renderQuad();
}
raycastPrg_->deactivate();
portGroup_.deactivateTargets();
TextureUnit::setZeroUnit();
LGL_ERROR;
}
