I create a manual object with quads and I keep the coordinates in memory array. I later need to find out a height (

*y*-coordinate) of the point on this manual object. Manual object is a grid and from the grid I have closest corners (

*p1*,

*p2*,

*p3*and

*p4*). Somewhere in the quad is a point for which I have

*x*and

*z*coordinate and I need to find

*y*.

Is there an easy way to get it?

Thank you for help