void RayTracingRenderer::render(Scene & scene) {
setRes(scene.camera->xRes(), scene.camera->yRes());
//clear m_rgbaBuffer
this->m_rgbaBuffer(scene.camera->xRes(), scene.camera->yRes());
this->m_rgbaBuffer.reset(Color4f(0));
//setup progress reporting using Platform::Progress
Platform::Progress renderProgress("Initializing", (scene.camera->xRes()/50)+1);
//for each pixel generate a camera ray
unsigned int xRes = scene.camera->xRes();
unsigned int yRes = scene.camera->yRes();
for (unsigned int i = 0; i < xRes; i++) {
for (unsigned int j = 0; j < yRes; j++) {
auto r = std::unique_ptr<Ray>(new Ray());
scene.camera->generateRay(r.get(), static_cast<float>(i), static_cast<float>(j));
//loop over all scene objects and find the closest intersection
for (unsigned int k = 0; k < scene.shapes.size(); k++)
scene.shapes[k]->intersect(r.get());
//if ray hit something then shade it
if (r->hit.shape != 0 && r->hit.surfaceShader != 0) {
std::stack<float> refraction = std::stack<float>();
refraction.push(1);
Math::Color3f shaded = r->hit.surfaceShader->shade(r->hit, &scene, refraction);
m_rgbaBuffer(i,j).x = shaded.x;
m_rgbaBuffer(i,j).y = shaded.y;
m_rgbaBuffer(i,j).z = shaded.z;
m_rgbaBuffer(i,j).w = 1;
} else
m_rgbaBuffer(i,j) = scene.background->getBackground(r->d);
}
if (i % 50 == 0)
renderProgress.step();
}
renderProgress.step();
//Copy the final rendering to the texture
glBindTexture(GL_TEXTURE_2D, m_fbo->colorTextureID(0));
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_fbo->width(), m_fbo->height(), GL_RGBA, GL_FLOAT, &m_rgbaBuffer(0,0));
glBindTexture(GL_TEXTURE_2D, 0);
//Render to Screen
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
m_fbo->displayAsFullScreenTexture(FBO_COLOR0);
}
void
PhotonMapper::render(Scene &scene)
{
int xRes = scene.camera.xRes();
int yRes = scene.camera.yRes();
setRes(xRes, yRes);
//clear m_rgbaBuffer
m_rgbaBuffer.reset(Math::Color4f(1.0,1,1,1.0));
//setup progress reporting using Platform::Progress
//for each pixel generate a camera ray
if (scene.photonMap == NULL && scene.specularPhotonMap == NULL) {
scene.emit_scatterPhotons();
}
Platform::Progress progress = Platform::Progress("Raytracing Image", xRes*yRes);
for (int i=0; i < xRes; i++) {
#pragma omp parallel for
for (int j=0; j<yRes; j++) {
Ray r = Ray();
scene.camera.generateRay(r, i, j);
Math::Vec3f col = recursiveRender(r, *(scene.photonMap), *(scene.specularPhotonMap), scene, true);
m_rgbaBuffer(i, j) = Math::Vec4f(col.x, col.y, col.z, 1.0);
}
progress.step(yRes);
}
//Copy the final rendering to the texture
glBindTexture(GL_TEXTURE_2D, m_fbo.colorTextureID(0));
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_fbo.width(), m_fbo.height(), GL_RGBA, GL_FLOAT, &m_rgbaBuffer(0,0));
glBindTexture(GL_TEXTURE_2D, 0); //Render to Screen
m_fbo.blitFramebuffer(FBO_COLOR0);
// glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
// m_fbo.displayAlphaAsFullScreenTexture(FBO_COLOR0);
}
void
PhotonMapper::setRes(int x, int y)
{
m_rgbaBuffer.resizeErase(x, y);
m_fbo.resizeExistingFBO(x, y);
// clear the buffers
m_rgbaBuffer = Math::Vec4f(0.0f);
// Upload a blank texture to the FBO
glBindTexture(GL_TEXTURE_2D, m_fbo.colorTextureID(0));
glTexSubImage2D(GL_TEXTURE_2D, 0, 0, 0, m_fbo.width(), m_fbo.height(), GL_RGBA, GL_FLOAT, &m_rgbaBuffer(0,0));
glBindTexture(GL_TEXTURE_2D, 0);
}
