/// <summary>
/// multyply this matrix by the given <see cref="T:Orts.Formats.Msts.matrix"/>
/// </summary>
/// <param name="m"></param>
/// <returns></returns>
/// <remarks>Also sums the offset vector</remarks>
public matrix Mul(matrix m)
{
matrix ret;
if (isUnity())
{
ret = m;
}
else if (isUnity(m))
{
ret = mat;
}
else
{
ret = new matrix();
for (int j = 0; j < 3; j++)
{
for (int k = 0; k < 3; k++)
{
ret[j, k] = 0;
for (int n = 0; n < 3; n++)
{
ret[j, k] += mat[j, n] * m[n, k];
}
}
}
}
PointEx pe = new PointEx(new point(m.DX, m.DY, m.DZ));
point p = pe.Sum(new point(mat.DX, mat.DY, mat.DZ));
ret.DX = p.X;
ret.DY = p.Y;
ret.DZ = p.Z;
return(ret);
}
/// <summary>
/// Multiply the given <see cref="T:Orts.Formats.Msts.point"/> by this matrix
/// </summary>
/// <param name="p"></param>
/// <returns></returns>
/// <remarks>Also sums the offset vector</remarks>
public point Mul(point p)
{
point ret;
if (isUnity())
{
ret = p;
}
else
{
ret = new point(p.X * mat.AX + p.Y * mat.BX + p.Z * mat.CX,
p.X * mat.AY + p.Y * mat.BY + p.Z * mat.CY,
p.X * mat.AZ + p.Y * mat.BZ + p.Z * mat.CZ);
}
PointEx pe = new PointEx(ret);
return(pe.Sum(new point(mat.DX, mat.DY, mat.DZ)));
}