void Bucket::sample(int x, int y)
{
Vec3 sample = m_sampler->getSquareSample();
int lightBounces = m_scene->m_settings.m_lightBounces;
int cameraBounces = m_scene->m_settings.m_cameraBounces;
Ray ray = m_viewPlane->getPixelRay(x,y,*m_sampler);
RGBA finalCol(0.0f);
RGBA col(0.0f);
int numCameraNodes = 0;
int numLightNodes = 1;
buildPath(m_cameraPath,&ray,numCameraNodes, RGBA(1.0f,1.0f,1.0f,1.0f), 0, cameraBounces);
int lightIndex = floor(m_sampler->get1DSample()*m_scene->m_lights.size());
Light *light = m_scene->m_lights[lightIndex];
ray = light->getRay(*m_sampler);
m_lightPath[0].m_sr.m_hitPos = ray.m_origin;
m_lightPath[0].m_accumColor = RGBA(1.0f,1.0f,1.0f,1.0f);
for(int j=0;j<numCameraNodes;j++){
PathNode &cameraNode = m_cameraPath[j];
for(int i=0;i<numLightNodes;i++){
PathNode &lightNode = m_lightPath[i];
Vec3 dir = lightNode.m_sr.m_hitPos - cameraNode.m_sr.m_hitPos;
float maxT = dir.length();
dir.normalize();
float delta = 0.001f;
Vec3 tmp = dir * delta;
tmp = cameraNode.m_sr.m_hitPos - tmp;
Ray ray = Ray(tmp,dir,true);
ray.computePlucker();
float pdf;
col = light->getLightColor(dir, cameraNode.m_sr.m_hitPos, lightNode.m_sr.m_hitPos, &pdf);
float shadeVal = float(m_scene->m_lights.size())/pdf;
shadeVal *= m_scene->traceShadow(ray,maxT);
col *= cameraNode.m_accumColor;
cameraNode.m_sr.m_material->shade(cameraNode.m_incident, dir, cameraNode.m_sr, &col, m_shadingContext);
col *= shadeVal;
finalCol += col;
}
}
if(numCameraNodes != 0){
finalCol[3] = 1.0f;
}
else{
finalCol = RGBA(0.0f,0.0f,0.0f,0.0f);
}
m_viewPlane->setPixelValue(x,y,finalCol);
}
void Instance::hit(Ray &ray, ShadeRec &sr) const
{
const Triangle *tmpTriangle = sr.m_triangle;
if(!sr.m_hit){
tmpTriangle = 0;
}
Ray tmpRay = ray;
m_transform.multDirMatrix(tmpRay.m_dir, tmpRay.m_dir);
m_transform.multVecMatrix(tmpRay.m_origin, tmpRay.m_origin);
tmpRay.computePlucker();
m_bvh->hit(tmpRay, sr);
if(sr.m_hit){
if(sr.m_triangle != tmpTriangle){
sr.m_hitPos = tmpRay.getPointAtPos(sr.m_hitT);
sr.m_triangle->shadeInfo(tmpRay,sr);
m_normalinvTransform.multDirMatrix(sr.m_normal, sr.m_normal);
sr.m_normal.normalize();
sr.m_calculated = true;
sr.m_hitPos = ray.getPointAtPos(sr.m_hitT);
}
}
return;
}
