void rayCubeCollisionTests() {
// hit a cube
vxVector cubeA(0, 0, 0);
vxVector cubeB(64, 64, 64);
vxRay testRay(vxVector(-64, -64, -64), vxVector(1, 1, 1));
assert(testRay.intersect(cubeA, cubeB).hit);
// miss a cube
vxRay antiTestRay(vxVector(70, 70, 70), vxVector(-1, -1, 0));
assert(!antiTestRay.intersect(cubeA, cubeB).hit);
}
void rayPlaneCollisionTests() {
vxVector planeA(-5, 0, 0);
vxVector planeB(5, 0, 0);
vxVector planeC(5, 5, 0);
// hit going forward
vxRay testRay(vxVector(0, 2.5, -5), vxVector(0, 0, 1));
assert(testRay.intersect(planeA, planeB, planeC).hit);
// see if it hits even if the direction is backward
vxRay infiniteHitRay(vxVector(0, 2.5, -5), vxVector(0, 0, -1));
assert(infiniteHitRay.intersect(planeA, planeB, planeC).hit);
}
void RealisticCamera::TestExitPupilBounds() const {
Float filmDiagonal = film->diagonal;
static RNG rng;
Float u = rng.UniformFloat();
Point3f pFilm(u * filmDiagonal / 2, 0, 0);
Float r = pFilm.x / (filmDiagonal / 2);
int pupilIndex =
std::min((int)exitPupilBounds.size() - 1,
(int)std::floor(r * (exitPupilBounds.size() - 1)));
Bounds2f pupilBounds = exitPupilBounds[pupilIndex];
if (pupilIndex + 1 < (int)exitPupilBounds.size())
pupilBounds = Union(pupilBounds, exitPupilBounds[pupilIndex + 1]);
// Now, randomly pick points on the aperture and see if any are outside
// of pupil bounds...
for (int i = 0; i < 1000; ++i) {
Point2f pd = ConcentricSampleDisk(
Point2f(rng.UniformFloat(), rng.UniformFloat()));
pd *= RearElementRadius();
Ray testRay(pFilm, Point3f(pd.x, pd.y, 0.f) - pFilm);
Ray testOut;
if (!TraceLensesFromFilm(testRay, &testOut)) continue;
if (!Inside(pd, pupilBounds)) {
fprintf(stderr,
"Aha! (%f,%f) went through, but outside bounds (%f,%f) - "
"(%f,%f)\n",
pd.x, pd.y, pupilBounds.pMin[0], pupilBounds.pMin[1],
pupilBounds.pMax[0], pupilBounds.pMax[1]);
RenderExitPupil(
(Float)pupilIndex / exitPupilBounds.size() * filmDiagonal / 2.f,
0.f, "low.exr");
RenderExitPupil((Float)(pupilIndex + 1) / exitPupilBounds.size() *
filmDiagonal / 2.f,
0.f, "high.exr");
RenderExitPupil(pFilm.x, 0.f, "mid.exr");
exit(0);
}
}
fprintf(stderr, ".");
}
