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Document that matrix composition is RTL

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Lars Mueller 2025-06-02 14:58:52 +02:00
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doc/lua_api.md
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@ -4277,8 +4277,11 @@ Linear algebra:
* `Matrix4:transform_direction(dir)`: * `Matrix4:transform_direction(dir)`:
* Apply the matrix to a vector representing a direction. * Apply the matrix to a vector representing a direction.
* Ignores the fourth row and column; does not apply the translation (w = 0). * Ignores the fourth row and column; does not apply the translation (w = 0).
* `Matrix4.compose(...)`: Returns the composition of the given matrices. * `Matrix4.compose(...)`: Returns the composition of the given matrices
in right-to-left order: `second:compose(first):apply(v)`
is equivalent to `second:apply(first:apply(v))`.
If `...` is empty, this is just the identity. If `...` is empty, this is just the identity.
`Matrix4:compose()` copies the matrix.
* `Matrix4:determinant()`: Returns the determinant. * `Matrix4:determinant()`: Returns the determinant.
* `Matrix4:invert()`: Returns a newly created inverse, or `nil` if the matrix is (close to being) singular. * `Matrix4:invert()`: Returns a newly created inverse, or `nil` if the matrix is (close to being) singular.
* `Matrix4:transpose()`: Returns a transposed copy of the matrix. * `Matrix4:transpose()`: Returns a transposed copy of the matrix.