Source code for pbrt, the renderer described in the third edition of "Physically Based Rendering: From Theory To Implementation", by Matt Pharr, Wenzel Jakob, and Greg Humphreys.
sorry for my poor english~.
I have some confuse at the code isect = (ObjectToWorld)(SurfaceInteraction( ray(pc.z), pError, Point2f(u, v), -ray.d, dpdu, dpdv, Normal3f(0, 0, 0), Normal3f(0, 0, 0), ray.time, this)); in line 367 of curve.cpp.
the hit point is eq ray(pc.z) here,but i think is's ray((tHit)) but not ray(pc.z) because the pc.z is not eq tHit if the length of ray is not normalized.
mmp
commented
5 years ago
sorry for my poor english~. I have some confuse at the code isect = (ObjectToWorld)(SurfaceInteraction( ray(pc.z), pError, Point2f(u, v), -ray.d, dpdu, dpdv, Normal3f(0, 0, 0), Normal3f(0, 0, 0), ray.time, this)); in line 367 of curve.cpp. the hit point is eq ray(pc.z) here,but i think is's ray((tHit)) but not ray(pc.z) because the pc.z is not eq tHit if the length of ray is not normalized.