void Renderer::renderDeferredShading()
{
if (!m_shaderDSLighting || !m_shaderDSCompositing)
init(m_windowWidth, m_windowHeight);
if (!m_dsLightColor || !m_dsLightRootNode)
throw std::string("Error in renderDeferredShading - Light Color or Light Root Node was not set");
FBO *a = new FBO(m_windowWidth,m_windowHeight,3,false,false);
a->bind();
glCullFace(GL_FRONT);
glEnable(GL_CULL_FACE);
glDisable(GL_DEPTH_TEST);
glEnable(GL_BLEND);
glBlendFunc(GL_ONE, GL_ONE);
glClearColor(0, 0, 0, 0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_shaderDSLighting->bind();
m_shaderDSLighting->sendMat4("viewMatrix", m_currentViewMatrix);
m_shaderDSLighting->sendMat4("projectionMatrix", m_currentProjectionMatrix);
m_shaderDSLighting->sendSampler2D("positionMap", m_gBuffer->getColorTexture(0), 0);
m_shaderDSLighting->sendSampler2D("normalMap", m_gBuffer->getColorTexture(1), 1);
m_shaderDSLighting->sendInt("windowWidth", m_windowWidth);
m_shaderDSLighting->sendInt("windowHeight", m_windowHeight);
m_shaderDSLighting->sendVec3("lightColor", *m_dsLightColor);
m_dsLightRootNode->render(*m_shaderDSLighting);
glDisable(GL_CULL_FACE);
glEnable(GL_DEPTH_TEST);
glDisable(GL_BLEND);
glClearColor(1.0, 1.0, 1.0, 0.0);
m_shaderDSLighting->unbind();
a->unbind();
//COMPOSITING TEIL ===============================
bindFBO();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_shaderDSCompositing->bind();
m_shaderDSCompositing->sendSampler2D("colorMap", getLastFBO()->getColorTexture(2), 0);
m_shaderDSCompositing->sendSampler2D("lightMap", a->getColorTexture(2), 1);
m_sfq.renderGeometry();
m_shaderDSCompositing->unbind();
unbindFBO();
delete a;
}
void onFrame(){
model = glm::mat4(1.0);
vec3 totals = rotateBehavior.tick(now()).totals();
model = glm::rotate(model, totals.x, vec3(1.0f,0.0f,0.0f));
model = glm::rotate(model, totals.y, vec3(0.0f,1.0f,0.0f));
model = glm::rotate(model, totals.z, vec3(0.0f,0.0f,1.0f));
//draw cube 1 into an offscreen texture
fbo.bind(); {
glViewport(0, 0, fbo.width, fbo.height);
glClearColor(0.1,0.1,0.1,1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
draw(model, cubeMeshBuffer1, texture, textureProgram);
} fbo.unbind();
//draw cube 2 with the offscreen texture using phong shading
glViewport(0, 0, width, height);
glClearColor(0.0,0.0,0.0,1.0);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
model = glm::mat4(1.0);
model = glm::translate(model, vec3(1.0,0.0,0.0));
model = glm::rotate(model, totals.x, vec3(1.0f,0.0f,0.0f));
model = glm::rotate(model, totals.y, vec3(0.0f,1.0f,0.0f));
model = glm::rotate(model, totals.z, vec3(0.0f,0.0f,1.0f));
draw(model, cubeMeshBuffer2, fbo.texture, phongProgram);
//draw cube 3 - a colored cube
model = mat4(1.0);
model = glm::translate(model, vec3(-1.0,0.0,0.0));
model = glm::rotate(model, -totals.x, vec3(1.0f,0.0f,0.0f));
model = glm::rotate(model, -totals.y, vec3(0.0f,1.0f,0.0f));
model = glm::rotate(model, -totals.z, vec3(0.0f,0.0f,1.0f));
programColor.bind(); {
glUniformMatrix4fv(programColor.uniform("model"), 1, 0, ptr(model));
glUniformMatrix4fv(programColor.uniform("view"), 1, 0, ptr(view));
glUniformMatrix4fv(programColor.uniform("proj"), 1, 0, ptr(proj));
cubeMeshBuffer3.draw();
} programColor.unbind();
}
void onDraw(Graphics& g){
// To render our scene to the FBO, we must first bind it
fbo.bind();
// Clear FBO
g.clear(Graphics::COLOR_BUFFER_BIT | Graphics::DEPTH_BUFFER_BIT);
// Render our scene as we normally would
g.draw(mesh);
// When done rendering our scene to the FBO, we must unbind it
fbo.unbind();
// To prove that this all worked, we render the FBO's color texture
tex.quadViewport(g);
}
void Renderer::renderSSAO()
{
if (!m_shaderSSAOcalc || !m_shaderSSAOblur || !m_shaderSSAOfinal)
init(m_windowWidth, m_windowHeight);
FBO *a = new FBO(m_windowWidth, m_windowHeight, 3, false, false);
FBO *b = new FBO(m_windowWidth, m_windowHeight, 3, false, false);
a->bind();
glClearColor(1, 1, 1, 1);
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_shaderSSAOcalc->bind();
m_shaderSSAOcalc->sendSampler2D("positionMap", m_gBuffer->getColorTexture(0), 0);
m_shaderSSAOcalc->sendSampler2D("normalMap", m_gBuffer->getColorTexture(1), 1);
m_shaderSSAOcalc->sendMat4("sceneProjectionMatrix", m_currentProjectionMatrix);
m_shaderSSAOcalc->sendFloat("radius", *m_ssaoRadius);
m_shaderSSAOcalc->sendFloat("quality", *m_ssaoQuality);
m_sfq.renderGeometry();
m_shaderSSAOcalc->unbind();
a->unbind();
//Blur #1 SSAO calculation
b->bind();
//glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_shaderSSAOblur->bind();
m_shaderSSAOblur->sendSampler2D("colortexture", a->getColorTexture(2), 0);
m_shaderSSAOblur->sendInt("secondPass", 0);
m_sfq.renderGeometry();
m_shaderSSAOblur->unbind();
b->unbind();
//Blur #2 SSAO calculation
a->bind();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_shaderSSAOblur->bind();
m_shaderSSAOblur->sendSampler2D("colortexture", b->getColorTexture(2), 0);
m_shaderSSAOblur->sendFloat("secondPass", 1);
m_sfq.renderGeometry();
m_shaderSSAOblur->unbind();
a->unbind();
glClearColor(0, 0, 0, 0);
//COLOR COMPOSITING
bindFBO();
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_shaderSSAOfinal->bind();
m_shaderSSAOfinal->sendSampler2D("colorMap", getLastFBO()->getColorTexture(2), 0);
m_shaderSSAOfinal->sendSampler2D("ssaoMap", a->getColorTexture(2), 1);
m_sfq.renderGeometry();
m_shaderSSAOfinal->unbind();
unbindFBO();
delete a;
delete b;
}
