bool
GfRay::Intersect(const GfPlane &plane,
double *distance, bool *frontFacing) const
{
// The dot product of the ray direction and the plane normal
// indicates the angle between them. Reject glancing
// intersections. Note: this also rejects ill-formed planes with
// zero normals.
double d = GfDot(_direction, plane.GetNormal());
if (d < GF_MIN_VECTOR_LENGTH && d > -GF_MIN_VECTOR_LENGTH)
return false;
// Get a point on the plane.
GfVec3d planePoint = plane.GetDistanceFromOrigin() * plane.GetNormal();
// Compute the parametric distance t to the plane. Reject
// intersections outside the ray bounds.
double t = GfDot(planePoint - _startPoint, plane.GetNormal()) / d;
if (t < 0.0)
return false;
if (distance)
*distance = t;
if (frontFacing)
*frontFacing = (d < 0.0);
return true;
}
static string _Repr(GfPlane const &self) {
return TF_PY_REPR_PREFIX + "Plane(" + TfPyRepr(self.GetNormal()) + ", " +
TfPyRepr(self.GetDistanceFromOrigin()) + ")";
}
