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include/cglm/struct/mat2.h
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258
include/cglm/struct/mat2.h
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/*
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* Copyright (c), Recep Aslantas.
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*
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* MIT License (MIT), http://opensource.org/licenses/MIT
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* Full license can be found in the LICENSE file
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*/
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/*
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Macros:
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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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CGLM_INLINE void glms_mat2_identity(mat2 mat)
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CGLM_INLINE void glms_mat2_identity_array(mat2 * restrict mat, size_t count)
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CGLM_INLINE void glms_mat2_zero(mat2 mat)
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CGLM_INLINE void glms_mat2_mul(mat2 m1, mat2 m2, mat2 dest)
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CGLM_INLINE void glms_mat2_transpose_to(mat2 m, mat2 dest)
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CGLM_INLINE void glms_mat2_transpose(mat2 m)
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CGLM_INLINE void glms_mat2_mulv(mat2 m, vec2 v, vec2 dest)
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CGLM_INLINE float glms_mat2_trace(mat2 m)
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CGLM_INLINE void glms_mat2_scale(mat2 m, float s)
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CGLM_INLINE float glms_mat2_det(mat2 mat)
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CGLM_INLINE void glms_mat2_inv(mat2 mat, mat2 dest)
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CGLM_INLINE void glms_mat2_swap_col(mat2 mat, int col1, int col2)
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CGLM_INLINE void glms_mat2_swap_row(mat2 mat, int row1, int row2)
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CGLM_INLINE float glms_mat2_rmc(vec2 r, mat2 m, vec2 c)
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*/
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#ifndef cglms_mat2_h
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#define cglms_mat2_h
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#include "../common.h"
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#include "../types-struct.h"
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#include "../mat2.h"
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#define GLMS_MAT2_IDENTITY_INIT {GLM_MAT2_IDENTITY_INIT}
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#define GLMS_MAT2_ZERO_INIT {GLM_MAT2_ZERO_INIT}
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/* for C only */
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#define GLMS_MAT2_IDENTITY ((mat3s)GLMS_MAT2_IDENTITY_INIT)
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#define GLMS_MAT2_ZERO ((mat3s)GLMS_MAT2_ZERO_INIT)
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/*!
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* @brief make given matrix identity. It is identical with below,
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* but it is more easy to do that with this func especially for members
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* e.g. glm_mat2_identity(aStruct->aMatrix);
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*
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* @code
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* glm_mat2_copy(GLM_MAT2_IDENTITY, mat); // C only
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*
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* // or
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* mat2 mat = GLM_MAT2_IDENTITY_INIT;
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* @endcode
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*
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* @returns identity matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_identity(void) {
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mat2s r;
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glm_mat2_identity(r.raw);
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return r;
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}
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/*!
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* @brief make given matrix array's each element identity matrix
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*
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* @param[in, out] mat matrix array (must be aligned (16)
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* if alignment is not disabled)
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*
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* @param[in] count count of matrices
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*/
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CGLM_INLINE
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void
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glms_mat2_identity_array(mat2s * __restrict mat, size_t count) {
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CGLM_ALIGN_MAT mat2s t = GLMS_MAT2_IDENTITY_INIT;
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size_t i;
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for (i = 0; i < count; i++) {
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glm_mat2_copy(t.raw, mat[i].raw);
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}
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}
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/*!
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* @brief make given matrix zero.
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*
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* @returns matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_zero(void) {
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mat2s r;
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glm_mat2_zero(r.raw);
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return r;
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}
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/*!
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* @brief multiply m1 and m2 to dest
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*
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* m1, m2 and dest matrices can be same matrix, it is possible to write this:
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*
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* @code
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* mat2 m = GLM_MAT2_IDENTITY_INIT;
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* glm_mat2_mul(m, m, m);
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* @endcode
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*
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* @param[in] m1 left matrix
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* @param[in] m2 right matrix
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*
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* @returns matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_mul(mat2s m1, mat2s m2) {
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mat2s r;
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glm_mat2_mul(m1.raw, m2.raw, r.raw);
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return r;
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}
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/*!
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* @brief transpose mat2
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*
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* @param[in] m matrix to transpose
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*
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* @returns transposed matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_transpose(mat2s m) {
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glm_mat2_transpose(m.raw);
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return m;
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}
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/*!
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* @brief multiply mat2 with vec2 (column vector) and store in dest vector
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*
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* @param[in] m mat2 (left)
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* @param[in] v vec2 (right, column vector)
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* @returns vec2 (result, column vector)
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*/
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CGLM_INLINE
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vec2s
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glms_mat2_mulv(mat2s m, vec2s v) {
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vec2s r;
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glm_mat2_mulv(m.raw, v.raw, r.raw);
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return r;
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}
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/*!
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* @brief trace of matrix
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*
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* sum of the elements on the main diagonal from upper left to the lower right
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*
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* @param[in] m matrix
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*/
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CGLM_INLINE
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float
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glms_mat2_trace(mat2s m) {
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return glm_mat2_trace(m.raw);
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}
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/*!
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* @brief scale (multiply with scalar) matrix
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*
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* multiply matrix with scalar
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*
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* @param[in, out] m matrix
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* @param[in] s scalar
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* @returns matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_scale(mat2s m, float s) {
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glm_mat2_scale(m.raw, s);
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return m;
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}
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/*!
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* @brief mat2 determinant
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*
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* @param[in] mat matrix
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*
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* @return determinant
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*/
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CGLM_INLINE
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float
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glms_mat2_det(mat2s mat) {
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return glm_mat2_det(mat.raw);
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}
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/*!
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* @brief inverse mat2 and store in dest
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*
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* @param[in] mat matrix
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* @returns matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_inv(mat2s mat) {
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mat2s r;
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glm_mat2_inv(mat.raw, r.raw);
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return r;
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}
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/*!
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* @brief swap two matrix columns
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*
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* @param[in] mat matrix
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* @param[in] col1 col1
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* @param[in] col2 col2
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* @returns matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_swap_col(mat2s mat, int col1, int col2) {
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glm_mat2_swap_col(mat.raw, col1, col2);
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return mat;
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}
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/*!
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* @brief swap two matrix rows
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*
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* @param[in] mat matrix
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* @param[in] row1 row1
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* @param[in] row2 row2
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* @returns matrix
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*/
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CGLM_INLINE
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mat2s
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glms_mat2_swap_row(mat2s mat, int row1, int row2) {
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glm_mat2_swap_row(mat.raw, row1, row2);
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return mat;
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}
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/*!
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* @brief helper for R (row vector) * M (matrix) * C (column vector)
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*
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* rmc stands for Row * Matrix * Column
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*
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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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*
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* @param[in] r row vector or matrix1x2
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* @param[in] m matrix2x2
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* @param[in] c column vector or matrix2x1
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*
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* @return scalar value e.g. Matrix1x1
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*/
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CGLM_INLINE
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float
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glms_mat2_rmc(vec2s r, mat2s m, vec2s c) {
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return glm_mat2_rmc(r.raw, m.raw, c.raw);
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}
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#endif /* cglms_mat2_h */
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