Issue #37 new

getIntersectionWithRay direction ray has to point in opposite direction?

Anonymous created an issue

The getIntersectionWithRay in class Plane accepts a Ray3D object. However it only works correctly when the ray you provide has a direction pointing away from the plane instead of to it. It's possible I'm misunderstanding how it's supposed to work though? Try this example snippet:

Triangle3D planeTri = new Triangle3D( new Vec3D( 0, 1, 0 ), new Vec3D( 1, 0, 0 ), new Vec3D( 0, 0, 0 ) ); Plane plane = new Plane(planeTri); Ray3D ray = new Ray3D( 0, 0, 5, new Vec3D( 0, 0, 1 ) // Ray direction has to be opposite ); // This works, but shouldn't ReadonlyVec3D inter = plane.getIntersectionWithRay( ray ); println( inter );

With this working example, the ray point is 5 units above the plane with a direction vector pointing upwards. If I set the direction to have Z=-1, then it returns null. These cases should be reversed since it only makes sense that the direction vector would be pointing towards the plane from the base point.

Comments (0)

  1. Log in to comment