Camera::GetScreenRay optimizer issues?

Has anyone else run into the Y coordinate of Camera::GetScreenRay erroneously getting optimized out in release builds?

I had to wrap the function in #pragma optimize("", off) / #pragma optimize("", on) for the raycasts to work as everything needing that Y was getting a gobbly-gook value.

  • MSVC 2015 (14.0.25431.01 Update 3)
  • CMake 3.10.2

Wow. I’ll try it, have very similar environment on my laptop.

The ray direction ret.direction_ = ((viewProjInverse * far) - ret.origin_).Normalized(); seems to be the bit that kicks it all off.

Any change that puts the intermediate ((viewProjInverse * far) - ret.origin_) into meaningful storage results in happiness without the heavy handed disabling of optimization.

ret.direction_ = ((viewProjInverse * far) - ret.origin_);
ret.direction_.Normalize();