Function ToPlaneMatrix.ToXZPlane
        
                ToXZPlane
        
                (float3 p)
    
            
            Transforms from world space to the 'ground' plane of the graph.
                Public
            
        float3 ToXZPlane (
float3  |     p  |         
Transforms from world space to the 'ground' plane of the graph.
The transformation is purely a rotation so no scale or offset is used.
The elevation coordinate will be returned as the y coordinate of the returned vector.