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Throw exception when encountering a singular matrix on matrix inversion. Add indexer: (Matrix4[i, j]) (not implemented yet)

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This commit is contained in:
the_fiddler 2007-11-06 14:03:05 +00:00
parent 5409a5d6b5
commit ef8873904e
1 changed files with 7 additions and 13 deletions
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20
Source/OpenTK/Math/Matrix4.cs
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@ -94,7 +94,8 @@ namespace OpenTK.Math
{
get
{
return Row0.X * Row1.Y * Row2.Z * Row3.W - Row0.X * Row1.Y * Row2.W * Row3.Z + Row0.X * Row1.Z * Row2.W * Row3.Y - Row0.X * Row1.Z * Row2.Y * Row3.W
return
Row0.X * Row1.Y * Row2.Z * Row3.W - Row0.X * Row1.Y * Row2.W * Row3.Z + Row0.X * Row1.Z * Row2.W * Row3.Y - Row0.X * Row1.Z * Row2.Y * Row3.W
+ Row0.X * Row1.W * Row2.Y * Row3.Z - Row0.X * Row1.W * Row2.Z * Row3.Y - Row0.Y * Row1.Z * Row2.W * Row3.X + Row0.Y * Row1.Z * Row2.X * Row3.W
- Row0.Y * Row1.W * Row2.X * Row3.Z + Row0.Y * Row1.W * Row2.Z * Row3.X - Row0.Y * Row1.X * Row2.Z * Row3.W + Row0.Y * Row1.X * Row2.W * Row3.Z
+ Row0.Z * Row1.W * Row2.X * Row3.Y - Row0.Z * Row1.W * Row2.Y * Row3.X + Row0.Z * Row1.X * Row2.Y * Row3.W - Row0.Z * Row1.X * Row2.W * Row3.Y
@ -150,18 +151,9 @@ namespace OpenTK.Math
return Matrix4.Mult(left, right);
}
[CLSCompliant(false)]
unsafe public static explicit operator float*(Matrix4 mat)
public float get(int x, int y)
{
return &mat.Row0.X;
}
public static explicit operator IntPtr(Matrix4 mat)
{
unsafe
{
return (IntPtr)(&mat.Row0.X);
}
throw new NotImplementedException();
}
#endregion
@ -373,6 +365,7 @@ namespace OpenTK.Math
/// </summary>
/// <param name="mat">The matrix to invert</param>
/// <returns>The inverse of the given matrix if it has one, or the input if it is singular</returns>
/// <exception cref="InvalidOperationException">Thrown if the Matrix4 is singular.</exception>
public static Matrix4 Invert(Matrix4 mat)
{
int[] colIdx = { 0, 0, 0, 0 };
@ -434,7 +427,8 @@ namespace OpenTK.Math
// check for singular matrix
if (pivot == 0.0f)
{
return mat;
throw new InvalidOperationException("Matrix is singular and cannot be inverted.");
//return mat;
}
// Scale row so it has a unit diagonal