public TransformComponents(TransformComponents copy) : this()
{
m_Buffer[0] = copy.m_Buffer[0];
m_Buffer[1] = copy.m_Buffer[1];
m_Buffer[2] = copy.m_Buffer[2];
m_Buffer[3] = copy.m_Buffer[3];
m_Buffer[4] = copy.m_Buffer[4];
m_Buffer[5] = copy.m_Buffer[5];
}
static public void Decompose(Mat2D m, TransformComponents result)
{
float m0 = m[0], m1 = m[1], m2 = m[2], m3 = m[3];
float rotation = (float)Math.Atan2(m1, m0);
float denom = m0 * m0 + m1 * m1;
float scaleX = (float)Math.Sqrt(denom);
float scaleY = (m0 * m3 - m2 * m1) / scaleX;
float skewX = (float)Math.Atan2(m0 * m2 + m1 * m3, denom);
result[0] = m[4];
result[1] = m[5];
result[2] = scaleX;
result[3] = scaleY;
result[4] = rotation;
result[5] = skewX;
}
static public void Compose(Mat2D m, TransformComponents result)
{
float r = result[4];
if (r != 0.0)
{
Mat2D.FromRotation(m, r);
}
else
{
Mat2D.Identity(m);
}
m[4] = result[0];
m[5] = result[1];
Mat2D.Scale(m, m, result.Scale);
float sk = result[5];
if (sk != 0.0)
{
m[2] = m[0] * sk + m[2];
m[3] = m[1] * sk + m[3];
}
}