1 files changed, 274 insertions, 0 deletions
diff --git a/include/cglm/struct/mat2.h b/include/cglm/struct/mat2.h
new file mode 100644
index 0000000..915c1be
--- /dev/null
+++ b/include/cglm/struct/mat2.h
@@ -0,0 +1,274 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+/*
+ Macros:
+   GLM_MAT2_IDENTITY_INIT
+   GLM_MAT2_ZERO_INIT
+   GLM_MAT2_IDENTITY
+   GLM_MAT2_ZERO
+
+ Functions:
+   CGLM_INLINE mat2s glms_mat2_make(const float * __restrict src);
+   CGLM_INLINE mat2s glms_mat2_identity(void)
+   CGLM_INLINE void  glms_mat2_identity_array(mat2 * restrict mats, size_t count)
+   CGLM_INLINE mat2s glms_mat2_zero(void)
+   CGLM_INLINE mat2s glms_mat2_mul(mat2 m1, mat2 m2)
+   CGLM_INLINE vec2s glms_mat2_mulv(mat2 m, vec2 v)
+   CGLM_INLINE mat2s glms_mat2_transpose(mat2 m)
+   CGLM_INLINE mat2s glms_mat2_scale(mat2 m, float s)
+   CGLM_INLINE mat2s glms_mat2_inv(mat2 m)
+   CGLM_INLINE mat2s glms_mat2_swap_col(mat2 mat, int col1, int col2)
+   CGLM_INLINE mat2s glms_mat2_swap_row(mat2 mat, int row1, int row2)
+   CGLM_INLINE float glms_mat2_det(mat2 m)
+   CGLM_INLINE float glms_mat2_trace(mat2 m)
+   CGLM_INLINE float glms_mat2_rmc(vec2 r, mat2 m, vec2 c)
+ */
+
+#ifndef cglms_mat2_h
+#define cglms_mat2_h
+
+#include "../common.h"
+#include "../types-struct.h"
+#include "../mat2.h"
+
+/* api definition */
+#define glms_mat2_(NAME) CGLM_STRUCTAPI(mat2, NAME)
+
+#define GLMS_MAT2_IDENTITY_INIT {GLM_MAT2_IDENTITY_INIT}
+#define GLMS_MAT2_ZERO_INIT     {GLM_MAT2_ZERO_INIT}
+
+/* for C only */
+#define GLMS_MAT2_IDENTITY ((mat2s)GLMS_MAT2_IDENTITY_INIT)
+#define GLMS_MAT2_ZERO     ((mat2s)GLMS_MAT2_ZERO_INIT)
+
+/*!
+ * @brief Returns mat2s (r) from pointer (src).
+ *
+ * @param[in]   src pointer to an array of floats
+ * @return[out] r   constructed mat2s from raw pointer
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(make)(const float * __restrict src) {
+  mat2s r;
+  glm_mat2_make(src, r.raw);
+  return r;
+}
+
+/*!
+ * @brief Return a identity mat2s (r).
+ *
+ *        The same thing may be achieved with either of bellow methods,
+ *        but it is more easy to do that with this func especially for members
+ *        e.g. glm_mat2_identity(aStruct->aMatrix);
+ *
+ * @code
+ * glm_mat2_copy(GLM_MAT2_IDENTITY, mat); // C only
+ *
+ * // or
+ * mat2 mat = GLM_MAT2_IDENTITY_INIT;
+ * @endcode
+ *
+ * @return[out] r constructed mat2s from raw pointer
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(identity)(void) {
+  mat2s r;
+  glm_mat2_identity(r.raw);
+  return r;
+}
+
+/*!
+ * @brief Given an array of mat2s’s (mats) make each matrix an identity matrix.
+ *
+ * @param[in, out] mats  Array of mat2s’s (must be aligned (16/32) if alignment is not disabled)
+ * @param[in]      count Array size of mats or number of matrices
+ */
+CGLM_INLINE
+void
+glms_mat2_(identity_array)(mat2s * __restrict mats, size_t count) {
+  CGLM_ALIGN_MAT mat2s t = GLMS_MAT2_IDENTITY_INIT;
+  size_t i;
+
+  for (i = 0; i < count; i++) {
+    glm_mat2_copy(t.raw, mats[i].raw);
+  }
+}
+
+/*!
+ * @brief Return zero'd out mat2 (r).
+ *
+ * @return[out] r constructed mat2s from raw pointer
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(zero)(void) {
+  mat2s r;
+  glm_mat2_zero(r.raw);
+  return r;
+}
+
+/*!
+ * @brief Multiply mat2 (m1) by mat2 (m2) and return in mat2s (r)
+ *
+ *        m1 and m2 matrices can be the same matrix, it is possible to write this:
+ *
+ * @code
+ * mat2 m = GLM_MAT2_IDENTITY_INIT;
+ * mat2s r = glms_mat2_mul(m, m);
+ * @endcode
+ *
+ * @param[in]   m1 mat2s (left)
+ * @param[in]   m2 mat2s (right)
+ * @return[out] r  constructed mat2s from raw pointers
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(mul)(mat2s m1, mat2s m2) {
+  mat2s r;
+  glm_mat2_mul(m1.raw, m2.raw, r.raw);
+  return r;
+}
+
+/*
+ * @brief Multiply mat2s (m) by vec2s (v) and return in vec2s (r).
+ *
+ * @param[in]   m mat2s (left)
+ * @param[in]   v vec2s (right, column vector)
+ * @return[out] r constructed vec2s from raw pointers
+ */
+CGLM_INLINE
+vec2s
+glms_mat2_(mulv)(mat2s m, vec2s v) {
+  vec2s r;
+  glm_mat2_mulv(m.raw, v.raw, r.raw);
+  return r;
+}
+
+/*!
+ * @brief Transpose mat2s (m) and store result in the same matrix.
+ *
+ * @param[in]   m mat2s (src)
+ * @return[out] m constructed mat2s from raw pointers
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(transpose)(mat2s m) {
+  glm_mat2_transpose(m.raw);
+  return m;
+}
+
+/*!
+ * @brief Multiply mat2s (m) by scalar constant (s)
+ *
+ * @param[in]   m mat2s (src)
+ * @param[in]   s scalar value
+ * @return[out] m constructed mat2s from raw pointers
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(scale)(mat2s m, float s) {
+  glm_mat2_scale(m.raw, s);
+  return m;
+}
+
+/*!
+ * @brief Inverse mat2s (m) and return in mat2s (r).
+ *
+ * @param[in]   m mat2s (left, src)
+ * @return[out] r constructed mat2s from raw pointers
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(inv)(mat2s m) {
+  mat2s r;
+  glm_mat2_inv(m.raw, r.raw);
+  return r;
+}
+
+/*!
+ * @brief Swap two columns in mat2s (mat) and store in same matrix.
+ *
+ * @param[in]   mat  mat2s
+ * @param[in]   col1 column 1 array index
+ * @param[in]   col2 column 2 array index
+ * @return[out] mat  constructed mat2s from raw pointers columns swapped
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(swap_col)(mat2s mat, int col1, int col2) {
+  glm_mat2_swap_col(mat.raw, col1, col2);
+  return mat;
+}
+
+/*!
+ * @brief Swap two rows in mat2s (mat) and store in same matrix.
+ *
+ * @param[in]   mat  mat2s
+ * @param[in]   row1 row 1 array index
+ * @param[in]   row2 row 2 array index
+ * @return[out] mat  constructed mat2s from raw pointers rows swapped
+ */
+CGLM_INLINE
+mat2s
+glms_mat2_(swap_row)(mat2s mat, int row1, int row2) {
+  glm_mat2_swap_row(mat.raw, row1, row2);
+  return mat;
+}
+
+/*!
+ * @brief Returns mat2 determinant.
+ *
+ * @param[in] m mat2 (src)
+ *
+ * @return[out] mat2s raw pointers determinant (float)
+ */
+CGLM_INLINE
+float
+glms_mat2_(det)(mat2s m) {
+  return glm_mat2_det(m.raw);
+}
+
+/*!
+ * @brief Returns trace of matrix. Which is:
+ *
+ *        The sum of the elements on the main diagonal from
+ *        upper left corner to the bottom right corner.
+ *
+ * @param[in] m mat2 (m)
+ *
+ * @return[out] mat2s raw pointers trace (float)
+ */
+CGLM_INLINE
+float
+glms_mat2_(trace)(mat2s m) {
+  return glm_mat2_trace(m.raw);
+}
+
+/*!
+ * @brief Helper for  R (row vector) * M (matrix) * C (column vector)
+ *
+ *        rmc stands for Row * Matrix * Column
+ *
+ *        the result is scalar because M * C = ResC (1x2, column vector),
+ *        then if you take the dot_product(R (2x1), ResC (1x2)) = scalar value.
+ *
+ * @param[in] r vec2s (2x1, row vector)
+ * @param[in] m mat2s (2x2, matrix)
+ * @param[in] c vec2s (1x2, column vector)
+ *
+ * @return[out] Scalar value (float, 1x1)
+ */
+CGLM_INLINE
+float
+glms_mat2_(rmc)(vec2s r, mat2s m, vec2s c) {
+  return glm_mat2_rmc(r.raw, m.raw, c.raw);
+}
+
+#endif /* cglms_mat2_h */