180 lines
4.3 KiB
ReStructuredText
180 lines
4.3 KiB
ReStructuredText
.. default-domain:: C
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mat2
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====
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Header: cglm/mat2.h
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Table of contents (click to go):
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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Macros:
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1. GLM_mat2_IDENTITY_INIT
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#. GLM_mat2_ZERO_INIT
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#. GLM_mat2_IDENTITY
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#. GLM_mat2_ZERO
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Functions:
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1. :c:func:`glm_mat2_copy`
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#. :c:func:`glm_mat2_identity`
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#. :c:func:`glm_mat2_identity_array`
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#. :c:func:`glm_mat2_zero`
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#. :c:func:`glm_mat2_mul`
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#. :c:func:`glm_mat2_transpose_to`
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#. :c:func:`glm_mat2_transpose`
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#. :c:func:`glm_mat2_mulv`
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#. :c:func:`glm_mat2_scale`
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#. :c:func:`glm_mat2_det`
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#. :c:func:`glm_mat2_inv`
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#. :c:func:`glm_mat2_trace`
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#. :c:func:`glm_mat2_swap_col`
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#. :c:func:`glm_mat2_swap_row`
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#. :c:func:`glm_mat2_rmc`
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Functions documentation
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~~~~~~~~~~~~~~~~~~~~~~~
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.. c:function:: void glm_mat2_copy(mat2 mat, mat2 dest)
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copy mat2 to another one (dest).
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Parameters:
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| *[in]* **mat** source
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| *[out]* **dest** destination
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.. c:function:: void glm_mat2_identity(mat2 mat)
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copy identity mat2 to mat, or makes mat to identiy
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Parameters:
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| *[out]* **mat** matrix
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.. c:function:: void glm_mat2_identity_array(mat2 * __restrict mat, size_t count)
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make given matrix array's each element identity matrix
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Parameters:
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| *[in,out]* **mat** matrix array (must be aligned (16/32) if alignment is not disabled)
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| *[in]* **count** count of matrices
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.. c:function:: void glm_mat2_zero(mat2 mat)
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make given matrix zero
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Parameters:
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| *[in,out]* **mat** matrix to
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.. c:function:: void glm_mat2_mul(mat2 m1, mat2 m2, mat2 dest)
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multiply m1 and m2 to dest
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m1, m2 and dest matrices can be same matrix, it is possible to write this:
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.. code-block:: c
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mat2 m = GLM_mat2_IDENTITY_INIT;
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glm_mat2_mul(m, m, m);
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Parameters:
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| *[in]* **m1** left matrix
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| *[in]* **m2** right matrix
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| *[out]* **dest** destination matrix
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.. c:function:: void glm_mat2_transpose_to(mat2 m, mat2 dest)
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transpose mat4 and store in dest
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source matrix will not be transposed unless dest is m
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Parameters:
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| *[in]* **mat** source
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| *[out]* **dest** destination
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.. c:function:: void glm_mat2_transpose(mat2 m)
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tranpose mat2 and store result in same matrix
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Parameters:
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| *[in]* **mat** source
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| *[out]* **dest** destination
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.. c:function:: void glm_mat2_mulv(mat2 m, vec2 v, vec2 dest)
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multiply mat4 with vec4 (column vector) and store in dest vector
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Parameters:
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| *[in]* **mat** mat2 (left)
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| *[in]* **v** vec2 (right, column vector)
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| *[out]* **dest** destination (result, column vector)
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.. c:function:: void glm_mat2_scale(mat2 m, float s)
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multiply matrix with scalar
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Parameters:
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| *[in, out]* **mat** matrix
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| *[in]* **dest** scalar
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.. c:function:: float glm_mat2_det(mat2 mat)
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returns mat2 determinant
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Parameters:
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| *[in]* **mat** matrix
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Returns:
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mat2 determinant
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.. c:function:: void glm_mat2_inv(mat2 mat, mat2 dest)
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inverse mat2 and store in dest
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Parameters:
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| *[in]* **mat** matrix
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| *[out]* **dest** destination (inverse matrix)
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.. c:function:: void glm_mat2_trace(mat2 m)
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| sum of the elements on the main diagonal from upper left to the lower right
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Parameters:
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| *[in]* **m** matrix
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Returns:
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trace of matrix
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.. c:function:: void glm_mat2_swap_col(mat2 mat, int col1, int col2)
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swap two matrix columns
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Parameters:
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| *[in, out]* **mat** matrix
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| *[in]* **col1** col1
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| *[in]* **col2** col2
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.. c:function:: void glm_mat2_swap_row(mat2 mat, int row1, int row2)
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swap two matrix rows
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Parameters:
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| *[in, out]* **mat** matrix
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| *[in]* **row1** row1
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| *[in]* **row2** row2
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.. c:function:: float glm_mat2_rmc(vec2 r, mat2 m, vec2 c)
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| **rmc** stands for **Row** * **Matrix** * **Column**
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| helper for R (row vector) * M (matrix) * C (column vector)
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| the result is scalar because R * M = Matrix1x2 (row vector),
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| then Matrix1x2 * Vec2 (column vector) = Matrix1x1 (Scalar)
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Parameters:
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| *[in]* **r** row vector or matrix1x2
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| *[in]* **m** matrix2x2
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| *[in]* **c** column vector or matrix2x1
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Returns:
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scalar value e.g. Matrix1x1
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