1 files changed, 148 insertions, 0 deletions
diff --git a/include/cglm/mat3x2.h b/include/cglm/mat3x2.h
new file mode 100644
index 0000000..52173c0
--- /dev/null
+++ b/include/cglm/mat3x2.h
@@ -0,0 +1,148 @@
+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+/*
+ Macros:
+   GLM_MAT3X2_ZERO_INIT
+   GLM_MAT3X2_ZERO
+
+ Functions:
+   CGLM_INLINE void glm_mat3x2_copy(mat3x2 src, mat3x2 dest);
+   CGLM_INLINE void glm_mat3x2_zero(mat3x2 m);
+   CGLM_INLINE void glm_mat3x2_make(const float * __restrict src, mat3x2 dest);
+   CGLM_INLINE void glm_mat3x2_mul(mat3x2 m1, mat2x3 m2, mat2 dest);
+   CGLM_INLINE void glm_mat3x2_mulv(mat3x2 m, vec3 v, vec2 dest);
+   CGLM_INLINE void glm_mat3x2_transpose(mat3x2 src, mat2x3 dest);
+   CGLM_INLINE void glm_mat3x2_scale(mat3x2 m, float s);
+ */
+
+#ifndef cglm_mat3x2_h
+#define cglm_mat3x2_h
+
+#include "common.h"
+
+#define GLM_MAT3X2_ZERO_INIT {{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}}
+
+/* for C only */
+#define GLM_MAT3X2_ZERO GLM_MAT3X2_ZERO_INIT
+
+/*!
+ * @brief Copy mat3x2 (src) to mat3x2 (dest).
+ *
+ * @param[in]  src  mat3x2 (left)
+ * @param[out] dest destination (result, mat3x2)
+ */
+CGLM_INLINE
+void
+glm_mat3x2_copy(mat3x2 src, mat3x2 dest) {
+  glm_vec2_copy(src[0], dest[0]);
+  glm_vec2_copy(src[1], dest[1]);
+  glm_vec2_copy(src[2], dest[2]);
+}
+
+/*!
+ * @brief Zero out the mat3x2 (m).
+ *
+ * @param[in, out] mat3x2 (src, dest)
+ */
+CGLM_INLINE
+void
+glm_mat3x2_zero(mat3x2 m) {
+  CGLM_ALIGN_MAT mat3x2 t = GLM_MAT3X2_ZERO_INIT;
+  glm_mat3x2_copy(t, m);
+}
+
+/*!
+ * @brief Create mat3x2 (dest) from pointer (src).
+ *
+ * @param[in]  src  pointer to an array of floats (left)
+ * @param[out] dest destination (result, mat3x2)
+ */
+CGLM_INLINE
+void
+glm_mat3x2_make(const float * __restrict src, mat3x2 dest) {
+  dest[0][0] = src[0];
+  dest[0][1] = src[1];
+
+  dest[1][0] = src[2];
+  dest[1][1] = src[3];
+
+  dest[2][0] = src[4];
+  dest[2][1] = src[5];
+}
+
+/*!
+ * @brief Multiply mat3x2 (m1) by mat2x3 (m2) and store in mat2 (dest).
+ *
+ * @code
+ * glm_mat3x2_mul(mat3x2, mat2x3, mat2);
+ * @endcode
+ *
+ * @param[in]  m1   mat3x2 (left)
+ * @param[in]  m2   mat2x3 (right)
+ * @param[out] dest destination (result, mat2)
+ */
+CGLM_INLINE
+void
+glm_mat3x2_mul(mat3x2 m1, mat2x3 m2, mat2 dest) {
+  float a00 = m1[0][0], a01 = m1[0][1],
+        a10 = m1[1][0], a11 = m1[1][1],
+        a20 = m1[2][0], a21 = m1[2][1],
+
+        b00 = m2[0][0], b01 = m2[0][1], b02 = m2[0][2],
+        b10 = m2[1][0], b11 = m2[1][1], b12 = m2[1][2];
+
+  dest[0][0] = a00 * b00 + a10 * b01 + a20 * b02;
+  dest[0][1] = a01 * b00 + a11 * b01 + a21 * b02;
+
+  dest[1][0] = a00 * b10 + a10 * b11 + a20 * b12;
+  dest[1][1] = a01 * b10 + a11 * b11 + a21 * b12;
+}
+
+/*!
+ * @brief Multiply mat3x2 (m) by vec3 (v) and store in vec2 (dest).
+ *
+ * @param[in]  m    mat3x2 (left)
+ * @param[in]  v    vec3 (right, column vector)
+ * @param[out] dest destination (result, column vector)
+ */
+CGLM_INLINE
+void
+glm_mat3x2_mulv(mat3x2 m, vec3 v, vec2 dest) {
+  float v0 = v[0], v1 = v[1], v2 = v[2];
+
+  dest[0] = m[0][0] * v0 + m[1][0] * v1 + m[2][0] * v2;
+  dest[1] = m[0][1] * v0 + m[1][1] * v1 + m[2][1] * v2;
+}
+
+/*!
+ * @brief Transpose mat3x2 (src) and store in mat2x3 (dest).
+ *
+ * @param[in]  src  mat3x2 (left)
+ * @param[out] dest destination (result, mat2x3)
+ */
+CGLM_INLINE
+void
+glm_mat3x2_transpose(mat3x2 src, mat2x3 dest) {
+  dest[0][0] = src[0][0];  dest[0][1] = src[1][0];  dest[0][2] = src[2][0];
+  dest[1][0] = src[0][1];  dest[1][1] = src[1][1];  dest[1][2] = src[2][1];
+}
+
+/*!
+ * @brief Multiply mat3x2 (m) by scalar constant (s).
+ *
+ * @param[in, out] m (src, dest)
+ * @param[in]      s float (scalar)
+ */
+CGLM_INLINE
+void
+glm_mat3x2_scale(mat3x2 m, float s) {
+  m[0][0] *= s;  m[0][1] *= s;  m[1][0] *= s;
+  m[1][1] *= s;  m[2][0] *= s;  m[2][1] *= s;
+}
+
+#endif