/// <summary>
/// Check whether an edge cuts through the W=0 plane
/// </summary>
/// <param name="a">Point a that describes the side</param>
/// <param name="b">Point b that describes the side</param>
/// <param name="sides">A list of all vertices</param>
/// <returns>1 if it cuts through 0 if it doesn't</returns>
private int SingleSide(float4 a, float4 b, List <float3> verts)
{
//check wheter or not one is lower then 0 in w
if (a.w * b.w <= 0)
{
float3 result = a.LerpByW(b);
verts.Add(result);
return(verts.Count - 1);
}
return(-1);
}
