Problem with shadows OpenGL
Solved
General and Desktop
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Hi, I am trying to add shadow to my scene and I am having problems when I have more than 1 light with shadows.
What happen is that sometimes it paint only 1 shadow and sometimes it paints the saame shadow twice and a bit moved.
Now I am using 2 lights.
This is my code for generating shadow maps:for( auto l : luces) { // - Para cada fuente luminosa if (l->getCastShadow() && l->getNeedRecalcShadow()) { if(l->getTipo() == PUNTUAL) { l->setLookAtSombra(QVector3D(camaras[camaraActiva].getLookAt())); } // - Calcular la matriz de visión y proyección para la luz lightVPMat l->calcularVPMatrix(); QMatrix4x4 vpMatrixLuz = l->getVPMatrix(); glwindow::getInstance()->makeCurrent(); glBindFramebuffer(GL_FRAMEBUFFER, l->getShadowFBO2()); glActiveTexture(GL_TEXTURE2); glBindTexture(GL_TEXTURE_2D, l->getDepthText()); glClear(GL_DEPTH_BUFFER_BIT); glViewport(0, 0, l->getShadowMapWidth(), l->getShadowMapHeight()); glEnable(GL_DEPTH_TEST); glDepthFunc(GL_LESS); glEnable(GL_PRIMITIVE_RESTART); glPrimitiveRestartIndex(FINAL); glEnable(GL_CULL_FACE); glCullFace(GL_FRONT); for( auto o : objetosEscena) { if (modoTextura) { QMatrix4x4 lightMVP = vpMatrixLuz * o.second->getModelMatrix(); shaderGenerarSombras->use(); shaderGenerarSombras->setUniform("mvpMatrixLuz", lightMVP); o.second->drawAsTriangles(shaderGenerarSombras,modelMatrix,l->getVisionMatrixLuz(),l->getProyectionMatrixLuz()); } } GLubyte *pixels; pixels = (GLubyte *)malloc(512*512*4); glReadPixels(0, 0, 512, 512, GL_DEPTH_COMPONENT, GL_UNSIGNED_BYTE, pixels); QImage image = QImage(pixels, 512, 512, QImage::Format_Grayscale8); image = image.mirrored(); QString str = "Mapa"+QString::number(cont)+".png"; cont++; bool resul = image.save(str, "PNG"); l->setNeedRecalcShadow(false); } }and this is the code to paint shadows:
glBindFramebuffer(GL_FRAMEBUFFER, glwindow::getInstance()->defaultFramebufferObject()); glClearColor(0.5f, 0.5f, 0.5f, 1.0f); glEnable(GL_MULTISAMPLE); glEnable(GL_DEPTH_TEST); glPrimitiveRestartIndex(FINAL); glEnable(GL_PRIMITIVE_RESTART); glEnable(GL_BLEND); glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT); glEnable(GL_CULL_FACE); glCullFace(GL_BACK); glViewport(0, 0, width, height); glDepthFunc(GL_LEQUAL); for( auto l : luces) { // - Para cada fuente luminosa if (l->getCastShadow()) { LightTypes tipo = l->getTipo(); if (tipo != AMBIENTAL) { if (primero) { glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA); primero = false; } else { glBlendFunc(GL_SRC_ALPHA, GL_ONE); } shaderProgram* shader = shadersLuzSombras.find(tipo)->second; l->setVisionMatrix(visionMatrix); l->aplicar(shader); shader->use(); if(atenuacionEnabled) { shader->setUniform("atenuacionEnabled",1); shader->setUniform("c1",c1); shader->setUniform("c2",c2); shader->setUniform("c3",c3); }else { shader->setUniform("atenuacionEnabled",0); } if(fogEnabled && l->getKeyLight()) { shader->setUniform("fogEnabled",1); shader->setUniform("zMin",this->zMin); shader->setUniform("zMax", this->zMax); }else { shader->setUniform("fogEnabled",0); } luzAmbiental->aplicar(shader); glActiveTexture(2); glBindTexture(GL_TEXTURE_2D, l->getDepthText()); QMatrix4x4 vpMatrixLuz = l->getVPMatrix(); QMatrix4x4 lightViewProjMatrix = shadowBias * vpMatrixLuz; for( auto o : objetosEscena) { QMatrix4x4 lightMVP = lightViewProjMatrix * o.second->getModelMatrix(); shader->use(); shader->setUniform("shadowMap", 2); shader->setUniform("mShadowMatrix",lightMVP); shader->setUniform("shadowMin",0.1f); o.second->drawAsTriangles(shader,modelMatrix,visionMatrix,proyectionMatrix); } } } }I was debbuging and the texture id are different and it coincides with the id where the shadow map are saved.
I leave you here the shadow maps:
and this is the result:
Thanks.