0
我目前使用3×2矩阵(称为Transform
),这样产生的:如何将3x2矩阵转换为4x4矩阵?
private void CalculateTransform()
{
_positionToOriginOffset = _position - _origin;
if (_positionToOriginOffset.X < 0.0f)
_positionToOriginOffset.X = 0.0f;
if (_positionToOriginOffset.Y <= _maxY)
_positionToOriginOffset.Y = _maxY;
if (_positionToOriginOffset.Y > 0.0f)
_positionToOriginOffset.Y = 0.0f;
Transform = SimpleMatrix3x2.Identity;
if (_zoom != 1.0f || _rotation != 0.0f)
{
Transform =
SimpleMatrix3x2.CreateTranslation(-Position) *
SimpleMatrix3x2.CreateScale(_zoom) *
SimpleMatrix3x2.CreateRotation(_rotation) *
SimpleMatrix3x2.CreateTranslation(Position);
}
Transform *= SimpleMatrix3x2.CreateTranslation(-_positionToOriginOffset);
}
public static SimpleMatrix3x2 CreateTranslation(SimpleVector2 position)
{
SimpleMatrix3x2 result;
result.M11 = 1.0f;
result.M12 = 0.0f;
result.M21 = 0.0f;
result.M22 = 1.0f;
result.M31 = position.X;
result.M32 = position.Y;
return result;
}
如何转换一个3x2的矩阵分为4x4?
public static Matrix ToMatrix4x4(SimpleMatrix3x2 matrix)
{
return new Matrix(...); ?
}
Matrix
类是从Microsoft.Xna.Framework
,它是一个4×3矩阵。