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Optimized Matrix4/Matrix4d.Mult by unrolling and inlining the multiplications.

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the_fiddler 2009-06-19 13:44:33 +00:00
parent 8604913954
commit 74c45c479e
2 changed files with 28 additions and 21 deletions
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2
Source/OpenTK/Math/Matrix4.cs
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@ -649,7 +649,7 @@ namespace OpenTK.Math
public static Matrix4 Mult(Matrix4 left, Matrix4 right)
{
Matrix4 result;
Matrix4.Mult(ref left, ref right, out result);
Mult(ref left, ref right, out result);
return result;
}

47
Source/OpenTK/Math/Matrix4d.cs
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@ -672,36 +672,43 @@ namespace OpenTK.Math
#region Multiply Functions
/// <summary>
/// Post multiply this matrix by another matrix
/// Multiplies two instances.
/// </summary>
/// <param name="left">The left operand of the multiplication.</param>
/// <param name="right">The right operand of the multiplication.</param>
/// <returns>A new instance that is the result of the multiplication</returns>
public static Matrix4d Mult(Matrix4d left, Matrix4d right)
{
Vector4d col0 = right.Column0;
Vector4d col1 = right.Column1;
Vector4d col2 = right.Column2;
Vector4d col3 = right.Column3;
left.Row0 = new Vector4d (Vector4d .Dot(left.Row0, col0), Vector4d .Dot(left.Row0, col1), Vector4d .Dot(left.Row0, col2), Vector4d .Dot(left.Row0, col3));
left.Row1 = new Vector4d (Vector4d .Dot(left.Row1, col0), Vector4d .Dot(left.Row1, col1), Vector4d .Dot(left.Row1, col2), Vector4d .Dot(left.Row1, col3));
left.Row2 = new Vector4d (Vector4d .Dot(left.Row2, col0), Vector4d .Dot(left.Row2, col1), Vector4d .Dot(left.Row2, col2), Vector4d .Dot(left.Row2, col3));
left.Row3 = new Vector4d (Vector4d .Dot(left.Row3, col0), Vector4d .Dot(left.Row3, col1), Vector4d .Dot(left.Row3, col2), Vector4d .Dot(left.Row3, col3));
return left;
Matrix4d result;
Mult(ref left, ref right, out result);
return result;
}
/// <summary>
/// Multiplies two instances.
/// </summary>
/// <param name="left">The left operand of the multiplication.</param>
/// <param name="right">The right operand of the multiplication.</param>
/// <param name="result">A new instance that is the result of the multiplication</param>
public static void Mult(ref Matrix4d left, ref Matrix4d right, out Matrix4d result)
{
Vector4d col0 = right.Column0;
Vector4d col1 = right.Column1;
Vector4d col2 = right.Column2;
Vector4d col3 = right.Column3;
result.Row0 = new Vector4d (Vector4d .Dot(left.Row0, col0), Vector4d .Dot(left.Row0, col1), Vector4d .Dot(left.Row0, col2), Vector4d .Dot(left.Row0, col3));
result.Row1 = new Vector4d (Vector4d .Dot(left.Row1, col0), Vector4d .Dot(left.Row1, col1), Vector4d .Dot(left.Row1, col2), Vector4d .Dot(left.Row1, col3));
result.Row2 = new Vector4d (Vector4d .Dot(left.Row2, col0), Vector4d .Dot(left.Row2, col1), Vector4d .Dot(left.Row2, col2), Vector4d .Dot(left.Row2, col3));
result.Row3 = new Vector4d (Vector4d .Dot(left.Row3, col0), Vector4d .Dot(left.Row3, col1), Vector4d .Dot(left.Row3, col2), Vector4d .Dot(left.Row3, col3));
result = new Matrix4d();
result.M11 = left.M11 * right.M11 + left.M12 * right.M21 + left.M13 * right.M31 + left.M14 * right.M41;
result.M12 = left.M11 * right.M12 + left.M12 * right.M22 + left.M13 * right.M32 + left.M14 * right.M42;
result.M13 = left.M11 * right.M13 + left.M12 * right.M23 + left.M13 * right.M33 + left.M14 * right.M43;
result.M14 = left.M11 * right.M14 + left.M12 * right.M24 + left.M13 * right.M34 + left.M14 * right.M44;
result.M21 = left.M21 * right.M11 + left.M22 * right.M21 + left.M23 * right.M31 + left.M24 * right.M41;
result.M22 = left.M21 * right.M12 + left.M22 * right.M22 + left.M23 * right.M32 + left.M24 * right.M42;
result.M23 = left.M21 * right.M13 + left.M22 * right.M23 + left.M23 * right.M33 + left.M24 * right.M43;
result.M24 = left.M21 * right.M14 + left.M22 * right.M24 + left.M23 * right.M34 + left.M24 * right.M44;
result.M31 = left.M31 * right.M11 + left.M32 * right.M21 + left.M33 * right.M31 + left.M34 * right.M41;
result.M32 = left.M31 * right.M12 + left.M32 * right.M22 + left.M33 * right.M32 + left.M34 * right.M42;
result.M33 = left.M31 * right.M13 + left.M32 * right.M23 + left.M33 * right.M33 + left.M34 * right.M43;
result.M34 = left.M31 * right.M14 + left.M32 * right.M24 + left.M33 * right.M34 + left.M34 * right.M44;
result.M41 = left.M41 * right.M11 + left.M42 * right.M21 + left.M43 * right.M31 + left.M44 * right.M41;
result.M42 = left.M41 * right.M12 + left.M42 * right.M22 + left.M43 * right.M32 + left.M44 * right.M42;
result.M43 = left.M41 * right.M13 + left.M42 * right.M23 + left.M43 * right.M33 + left.M44 * right.M43;
result.M44 = left.M41 * right.M14 + left.M42 * right.M24 + left.M43 * right.M34 + left.M44 * right.M44;
}
#endregion