 | XNA Framework Support |
DigitalRune Mathematics contains a version that supports the Microsoft XNA Framework (see also Files, Folders and Dependencies). This section explains XNA-specific issues.
DifferencesBoth, DigitalRune Mathematics and the Microsoft XNA Framework use a right-handed coordinate system. But vectors, matrices, and quaternions are used differently:
DigitalRune Mathematics | Microsoft XNA Framework | |
|---|---|---|
Coordinate system | right-handed | right-handed |
Vector notation | column vectors | row vectors |
Matrix notation | A matrix in DigitalRune Mathematics is the transpose of the matrix in XNA. | A matrix in XNA is the transpose of the matrix in DigitalRune Mathematics. |
Matrix multiplication | A coordinate vector is transformed by using pre-multiplication (also known as multiplication on the left): v' = M · v Transformations are concatenated by using pre-multiplication: M12 = M2 · M1. (Order is from right to left, M1 is applied before M2.) | A coordinate vector is transformed by using post-multiplication (also known as multiplication on the right): v' = v · M Transformations are concatenated by using post-multiplication: M12 = M1 · M2. (Order is from left to right, M1 is applied before M2. The matrices are transposed.) |
Quaternion notation | (w, x, y, z) | (x, y, z, w) |
Quaternion multiplication | Quaternions are concatenated using the following order: q12 = q2 · q1. (Order is from right to left, q1 is applied before q2.) | Quaternions are concatenated using the following order: q12 = q2 · q1. (Order is from right to left, q1 is applied before q2.) |
The matrix, vector and quaternion types contain methods to convert from or to the equivalent XNA types. For example: Vector3F has the methods Vector3FToXna / Vector3FFromXna(Vector3) or the explicit cast operators Vector3F (Vector3F to Vector3) / Vector3F (Vector3 to Vector3F).
Content pipeline projectsIf any types of DigitalRune Mathematics (such as Vector3F, Matrix44F, QuaternionF, etc.) are used in an XNA content pipeline extension library:
-
Add references to the following DLLs to your the content pipeline extension library:
- DigitalRune.dll
- DigitalRune.Mathematics.dll
- DigitalRune.Mathematics.Content.Pipeline.dll
-
For all XNA content projects that use the content pipeline extension library,
add references to the following DLLs to the content projects:
- DigitalRune.Mathematics.Content.Pipeline.dll
The DigitalRune.Mathematics.Content.Pipeline.dll contains ContentTypeWriters which ensure that the data types of DigitalRune Mathematics are properly serialized. Be sure to use the XNA-specific builds of the DLLs (see Files, Folders and Dependencies).
See Also