/// <summary>
/// 逆行列を取得する。
/// </summary>
/// <returns></returns>
public Matrix44F GetInverted()
{
Matrix44F o = this;
o.SetInverted();
return(o);
}
public static Matrix44F operator *(Matrix44F left, Matrix44F right)
{
Matrix44F o_ = new Matrix44F();
Mul(ref o_, ref left, ref right);
return(o_);
}
/// <summary>
/// Transformを計算します。
/// </summary>
/// <param name="position">座標</param>
/// <param name="centerPosition">中心座標</param>
/// <param name="angle">角度（弧度法）</param>
/// <param name="scale">拡大率</param>
/// <returns></returns>
internal static Matrix44F CalcTransform(Vector2F position, Vector2F centerPosition, float angle, Vector2F scale)
{
var matPosition = Matrix44F.GetTranslation2D(position);
var matCenterPosition = Matrix44F.GetTranslation2D(-centerPosition);
var matRotate = Matrix44F.GetRotationZ(angle);
var matScale = Matrix44F.GetScale2D(scale);
return(matPosition * matScale * matRotate * matCenterPosition);
// NOTE: 一気に計算したほうがよさそう
}
/// <summary>
/// 乗算を行う。
/// </summary>
/// <param name="o">出力先</param>
/// <param name="in1">行列1</param>
/// <param name="in2">行列2</param>
public static void Mul(ref Matrix44F o, ref Matrix44F in1, ref Matrix44F in2)
{
Matrix44F _in1 = in1;
Matrix44F _in2 = in2;
for (int i = 0; i < 4; i++)
{
for (int j = 0; j < 4; j++)
{
float v = 0.0f;
for (int k = 0; k < 4; k++)
{
v += _in1.Values[i, k] * _in2.Values[k, j];
}
o.Values[i, j] = v;
}
}
}
