public void Calculate()
{
// texture orientation
Real radangle = MathUtil.BinaryAngleToRadian((ushort)TextureAngle);
Real texorientx = (Real)System.Math.Cos(radangle);
Real texorienty = (Real)System.Math.Sin(radangle);
Real texorientz = 0;
TextureOrientation = new V3(texorientx, texorienty, texorientz);
// generate other endpoints from plane normal, texture origin, and texture
// orientation which determine the orientation of the texture's u v space
// in the 3d world's x, y, z space
// plane normal
V3 planeNormal = new V3(A, B, C);
// first point
// calculate z of texture origin from x, y, and plane equation
Real z = (-A * X0 - B * Y0 - D) / C;
P0 = new V3(X0, Y0, z);
// cross normal with texture orientation to get vector perpendicular to texture
// orientation and normal = v axis direction
V3 v2 = planeNormal.CrossProduct(TextureOrientation);
v2.ScaleToLength(GeometryConstants.FINENESS);
// cross normal with v axis direction vector to get vector perpendicular to v axis
// and normal = u axis direction vector
V3 v1 = v2.CrossProduct(planeNormal);
v1.ScaleToLength(GeometryConstants.FINENESS);
// add vectors to origin to get endpoints
P1 = P0 + v1;
P2 = P0 + v2;
}