Hi
I have managed to calculate where a line intersects a plane by substituting the parametric equations of a line into the equation of a plane.
If a plane can be defined as infinite and a line must intersect the plane at some point unless paralell to the line and not colinear, how can you determine if a point of intersection lies within the visible defined boundaries of the plane?
Suppose you have four co-planar points that form a convex quadrilateral.
You want the point to be in the interior of one pair of opposite angle.
Example suppose that is a convex quadrilateral.
Then are opposite angles.
So the point should be in the interior of both angles.