State::stateResult_t PhotonRenderer::doEnableState(FrameContext & context, Node * node, const RenderParam & rp){
#ifdef MINSG_THESISSTANISLAW_GATHER_STATISTICS
Rendering::RenderingContext::finish();
_timer.reset();
#endif // MINSG_THESISSTANISLAW_GATHER_STATISTICS
if(!_photonSampler){
WARN("No PhotonSampler present in PhotonRenderer!");
return State::stateResult_t::STATE_SKIPPED;
}
if(!_approxScene){
WARN("No approximated Scene present in PhotonRenderer!");
return State::stateResult_t::STATE_SKIPPED;
}
auto& rc = context.getRenderingContext();
rc.setImmediateMode(true);
rc.applyChanges();
if(_fboChanged){
if(!initializeFBO(rc)){
WARN("Could not initialize FBO for PhotonRenderer!");
return State::stateResult_t::STATE_SKIPPED;
}
_fboChanged = false;
}
RenderParam newRp;
rc.pushAndSetFBO(_fbo.get());
rc.clearDepth(1.0f);
rc.applyChanges();
for(int32_t i = 0; i < _photonSampler->getPhotonNumber(); i++){
_fbo->setDrawBuffers(2);
rc.pushAndSetShader(_indirectLightShader.get());
_lightPatchRenderer->bindTBO(rc, true, false);
_photonSampler->bindPhotonBuffer(1);
context.pushAndSetCamera(_photonCamera.get());
_indirectLightShader->setUniform(rc, Rendering::Uniform("photonID", i));
rc.clearDepth(1.0f);
rc.clearColor(Util::Color4f(0.f, 0.f, 0.f, 0.f));
_approxScene->display(context, newRp);
context.popCamera();
_photonSampler->unbindPhotonBuffer(1);
_lightPatchRenderer->unbindTBO(rc);
rc.popShader();
// Accumulate all pixel values in one photon
_fbo->setDrawBuffers(0);
rc.pushAndSetShader(_accumulationShader.get());
_accumulationShader->setUniform(rc, Rendering::Uniform("photonID", i));
_accumulationShader->setUniform(rc, Rendering::Uniform("samplingWidth", static_cast<int>(_samplingWidth)));
_accumulationShader->setUniform(rc, Rendering::Uniform("samplingHeight", static_cast<int>(_samplingHeight)));
_photonSampler->bindPhotonBuffer(1);
rc.clearDepth(1.0f);
Rendering::TextureUtils::drawTextureToScreen(rc, Geometry::Rect_i(0, 0, _samplingWidth, _samplingHeight), *_indirectLightTexture.get(), Geometry::Rect_f(0.0f, 0.0f, 1.0f, 1.0f));
_photonSampler->unbindPhotonBuffer(1);
rc.popShader();
}
rc.popFBO();
rc.setImmediateMode(false);
// rc.pushAndSetShader(nullptr);
// Rendering::TextureUtils::drawTextureToScreen(rc, Geometry::Rect_i(0, 0, _samplingWidth, _samplingHeight), *(_indirectLightTexture.get()), Geometry::Rect_f(0.0f, 0.0f, 1.0f, 1.0f));
// rc.popShader();
// return State::stateResult_t::STATE_SKIP_RENDERING;
#ifdef MINSG_THESISSTANISLAW_GATHER_STATISTICS
Rendering::RenderingContext::finish();
_timer.stop();
auto& stats = context.getStatistics();
Statistics::instance(stats).addPhotonRendererTime(stats, _timer.getMilliseconds());
#endif // MINSG_THESISSTANISLAW_GATHER_STATISTICS
return State::stateResult_t::STATE_OK;
}
void OpenGLRenderer::initialize() {
std::srand(std::time(0));
glEnable(GL_DEPTH_TEST);
//glEnable(GL_CULL_FACE);
//glEnable(GL_TEXTURE_2D); // Einem Befehl wurde ein falscher Wert übergeben --> wurde in OpenGL 3.x entfernt (deprecated in 2.x)
//glEnable(GL_BLEND);
//glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA);
checkForErrors();
initializeVAOs();
initializeMeshShader();
initializeFinalShader();
initializeAddShader();
initializeStarWarsShader();
// Textur-Handler erzeugen
glGenTextures(1, &texture_ID);
sizeChanged(523, 482); // sonst sind viewWidth & viewHeight noch uninitialisiert, was zu Fehlern beim Rendern mit den FBOs und bei configureFBOTextures() führt
// FBOs zugehörige Texturen für Transparenz & PostScreen-Effekte initialisieren
initializeFBO(fbo1, colorTexture1, depthTexture1);
initializeFBO(fbo2, colorTexture2, depthTexture2);
initializeFBO(fbo3, colorTexture3, depthTexture3);
/*// Texturhandles erstellen
glGenTextures(1, &colorTexture1);
glGenTextures(1, &depthTexture1);
glGenTextures(1, &colorTexture2);
glGenTextures(1, &depthTexture2);
glGenTextures(1, &colorTexture3);
glGenTextures(1, &depthTexture3);
checkForErrors();
// Konfiguriert leere Color- und Depth-Texturen in Bildschirmgröße, in die am Ende die leeren Dreiecke aus dem VBO_fbo gerendert werden können
configureFBOTextures(colorTexture1, depthTexture1);
configureFBOTextures(colorTexture2, depthTexture2);
configureFBOTextures(colorTexture3, depthTexture3);
checkForErrors();
// Erzeuge neue FBOs
glGenFramebuffers(1, &fbo1);
glBindFramebuffer(GL_FRAMEBUFFER, fbo1);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, colorTexture1, 0); // Verknüpfe Color-Textur 1 mit dem FBO
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, depthTexture1, 0); // Verknüpfe Depth-Textur 1 mit dem FBO
glGenFramebuffers(1, &fbo2);
glBindFramebuffer(GL_FRAMEBUFFER, fbo2);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, colorTexture2, 0); // Verknüpfe Color-Textur 2 mit dem FBO
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, depthTexture2, 0); // Verknüpfe Depth-Textur 2 mit dem FBO
glGenFramebuffers(1, &fbo3);
glBindFramebuffer(GL_FRAMEBUFFER, fbo3);
glFramebufferTexture(GL_FRAMEBUFFER, GL_COLOR_ATTACHMENT0, colorTexture3, 0); // Verknüpfe Color-Textur 3 mit dem FBO
glFramebufferTexture(GL_FRAMEBUFFER, GL_DEPTH_ATTACHMENT, depthTexture3, 0); // Verknüpfe Depth-Textur 3 mit dem FBO
if (glCheckFramebufferStatus(GL_FRAMEBUFFER) != GL_FRAMEBUFFER_COMPLETE) {
qDebug ( ) << "Error, FBO not complete!";
}
// gebundene Framebuffer wieder loslösen
glBindFramebuffer(GL_FRAMEBUFFER, 0);
checkForErrors();*/
}
