/// <summary>
/// Rotate the texture coordinates.
/// </summary>
public Quad RotateTextureCoordinates(Vector3 axis, int rotations)
{
if (new Vector3(Vert0.N, Vert0.O, Vert0.P).Absolute().Rounded(digits: 2) != axis)
{
return(this);
}
for (var r = 0; r < rotations; r++)
{
Vert0 = Vert0.RotateUV();
Vert1 = Vert1.RotateUV();
Vert2 = Vert2.RotateUV();
Vert3 = Vert3.RotateUV();
}
return(this);
}
/// <summary>
/// Apply a rotation matrix to this quad.
/// </summary>
public Quad ApplyRotationMatrixY(Matrix4 xyz, Matrix4 nop, int rotations)
{
// Rotate positions and normals.
Vert0 = Vert0.ApplyMatrix(xyz, nop);
Vert1 = Vert1.ApplyMatrix(xyz, nop);
Vert2 = Vert2.ApplyMatrix(xyz, nop);
Vert3 = Vert3.ApplyMatrix(xyz, nop);
// Rotate UVs for top and bottom sides.
if (new Vector3(Vert0.N, Vert0.O, Vert0.P).Absolute().Rounded(digits: 2) == Vector3.UnitY)
{
for (var r = 0; r < rotations; r++)
{
Vert0 = Vert0.RotateUV();
Vert1 = Vert1.RotateUV();
Vert2 = Vert2.RotateUV();
Vert3 = Vert3.RotateUV();
}
}
return(this);
}