本文整理汇总了C++中BSDF::isDelta方法的典型用法代码示例。如果您正苦于以下问题：C++ BSDF::isDelta方法的具体用法？C++ BSDF::isDelta怎么用？C++ BSDF::isDelta使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类BSDF的用法示例。
在下文中一共展示了BSDF::isDelta方法的1个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: extend
bool extend(BDPTPathVertex& next,
const Scene& scene,
uint32_t pathCount,
bool sampleAdjoint, // Number of paths sampled with the strategies s/t = m_nDepth + 1, t/s = *
RandomGenerator&& rng,
MisFunctor&& mis) {
if(!m_Intersection) {
return false; // Can't sample from infinity
}
Sample3f woSample;
float cosThetaOutDir;
uint32_t sampledEvent;
auto fs = m_BSDF.sample(Vec3f(getFloat(rng), getFloat2(rng)), woSample, cosThetaOutDir, &sampledEvent, sampleAdjoint);
if(woSample.pdf == 0.f || fs == zero<Vec3f>()) {
return false;
}
float reversePdf = m_BSDF.pdf(woSample.value, true);
auto nextI = scene.intersect(Ray(m_Intersection, woSample.value));
if(!nextI) {
next.m_Intersection = nextI;
next.m_BSDF.init(-woSample.value, scene);
next.m_fPdfWrtArea = woSample.pdf;
next.m_fPathPdf = m_fPathPdf * woSample.pdf;
next.m_Power = m_Power * abs(cosThetaOutDir) * fs / woSample.pdf;
next.m_nDepth = m_nDepth + 1;
auto previousPointToIncidentDirectionJacobian = abs(cosThetaOutDir); // No division by squared distance since the point is at infinity
if((sampledEvent & ScatteringEvent::Specular) && m_BSDF.isDelta()) {
next.m_fdVC = mis(previousPointToIncidentDirectionJacobian) * m_fdVC;
next.m_fdVCM = 0.f;
} else {
// We set dVC first in case next == *this, so that the dVCM is unchanged until next line
next.m_fdVC = mis(previousPointToIncidentDirectionJacobian / next.m_fPdfWrtArea) * (m_fdVCM + mis(reversePdf) * m_fdVC);
next.m_fdVCM = mis(pathCount / next.m_fPdfWrtArea);
}
} else {
auto incidentDirection = -woSample.value;
auto sqrLength = sqr(nextI.distance);
if(sqrLength == 0.f) {
return false;
}
auto pdfWrtArea = woSample.pdf * abs(dot(nextI.Ns, incidentDirection)) / sqrLength;
if(pdfWrtArea == 0.f) {
return false;
}
next.m_Intersection = nextI;
next.m_BSDF.init(incidentDirection, nextI, scene);
next.m_fPdfWrtArea = pdfWrtArea;
next.m_fPathPdf = m_fPathPdf * pdfWrtArea;
next.m_Power = m_Power * abs(cosThetaOutDir) * fs / woSample.pdf;
next.m_nDepth = m_nDepth + 1;
auto previousPointToIncidentDirectionJacobian = abs(cosThetaOutDir) / sqrLength;
if((sampledEvent & ScatteringEvent::Specular) && m_BSDF.isDelta()) {
next.m_fdVC = mis(previousPointToIncidentDirectionJacobian) * m_fdVC;
next.m_fdVCM = 0.f;
} else {
// We set dVC first in case next == *this, so that the dVCM is unchanged until next line
next.m_fdVC = mis(previousPointToIncidentDirectionJacobian / next.m_fPdfWrtArea) * (m_fdVCM + mis(reversePdf) * m_fdVC);
next.m_fdVCM = mis(pathCount / next.m_fPdfWrtArea);
}
}
return true;
}