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Apply Andy's patch on Matrix.Frustum and with skewed matrices.

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the_fiddler 2008-05-04 16:41:48 +00:00
parent 1ee1f81116
commit 59e8c4be14
1 changed files with 10 additions and 10 deletions
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20
Source/OpenTK/Math/Matrix4.cs
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@ -358,16 +358,16 @@ namespace OpenTK.Math
/// <param name="near">Distance to the near clip plane</param> /// <param name="near">Distance to the near clip plane</param>
/// <param name="far">Distance to the far clip plane</param> /// <param name="far">Distance to the far clip plane</param>
/// <returns>A projection matrix that transforms camera space to raster space</returns> /// <returns>A projection matrix that transforms camera space to raster space</returns>
public static Matrix4 Frustum(float left, float right, float bottom, float top, float near, float far) public static Matrix4 Frustum(float left, float right, float bottom, float top, float near, float far)
{ {
float invRL = 1.0f / (right - left); float invRL = 1.0f / (right - left);
float invTB = 1.0f / (top - bottom); float invTB = 1.0f / (top - bottom);
float invFN = 1.0f / (far - near); float invFN = 1.0f / (far - near);
return new Matrix4(new Vector4(2.0f * near * invRL, 0.0f, (right + left) * invRL, 0.0f), return new Matrix4(new Vector4(2.0f * near * invRL, 0.0f, 0.0f, 0.0f),
new Vector4(0.0f, 2.0f * near * invTB, (top + bottom) * invTB, 0.0f), new Vector4(0.0f, 2.0f * near * invTB, 0.0f, 0.0f),
new Vector4(0.0f, 0.0f, -(far + near) * invFN, -1.0f), new Vector4((right + left) * invRL, (top + bottom) * invTB, -(far + near) * invFN, -1.0f),
new Vector4(0.0f, 0.0f, -2.0f * far * near * invFN, 0.0f)); new Vector4(0.0f, 0.0f, -2.0f * far * near * invFN, 0.0f));
} }
/// <summary> /// <summary>
/// Build a projection matrix /// Build a projection matrix