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authorAaditya Dhruv <[email protected]>2026-01-25 15:10:37 -0600
committerAaditya Dhruv <[email protected]>2026-01-25 15:10:37 -0600
commit118980e02e59ff31871df59dce257075394f3533 (patch)
tree26fba4492bb4b561d21bf49b35d892a821d54fab /include/cglm/mat4x2.h
parent0e6e1245b70df4dfcba135d50e1b53d1a8ef7eb8 (diff)
wip
Diffstat (limited to 'include/cglm/mat4x2.h')
-rw-r--r--include/cglm/mat4x2.h153
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diff --git a/include/cglm/mat4x2.h b/include/cglm/mat4x2.h
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+++ b/include/cglm/mat4x2.h
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+/*
+ * Copyright (c), Recep Aslantas.
+ *
+ * MIT License (MIT), http://opensource.org/licenses/MIT
+ * Full license can be found in the LICENSE file
+ */
+
+/*
+ Macros:
+ GLM_MAT4X2_ZERO_INIT
+ GLM_MAT4X2_ZERO
+
+ Functions:
+ CGLM_INLINE void glm_mat4x2_copy(mat4x2 src, mat4x2 dest);
+ CGLM_INLINE void glm_mat4x2_zero(mat4x2 m);
+ CGLM_INLINE void glm_mat4x2_make(const float * __restrict src, mat4x2 dest);
+ CGLM_INLINE void glm_mat4x2_mul(mat4x2 m1, mat2x4 m2, mat2 dest);
+ CGLM_INLINE void glm_mat4x2_mulv(mat4x2 m, vec4 v, vec2 dest);
+ CGLM_INLINE void glm_mat4x2_transpose(mat4x2 src, mat2x4 dest);
+ CGLM_INLINE void glm_mat4x2_scale(mat4x2 m, float s);
+ */
+
+#ifndef cglm_mat4x2_h
+#define cglm_mat4x2_h
+
+#include "common.h"
+
+#define GLM_MAT4X2_ZERO_INIT {{0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}, {0.0f, 0.0f}}
+
+/* for C only */
+#define GLM_MAT4X2_ZERO GLM_MAT4X2_ZERO_INIT
+
+/*!
+ * @brief Copy mat4x2 (src) to mat4x2 (dest).
+ *
+ * @param[in] src mat4x2 (left)
+ * @param[out] dest destination (result, mat4x2)
+ */
+CGLM_INLINE
+void
+glm_mat4x2_copy(mat4x2 src, mat4x2 dest) {
+ glm_vec2_copy(src[0], dest[0]);
+ glm_vec2_copy(src[1], dest[1]);
+ glm_vec2_copy(src[2], dest[2]);
+ glm_vec2_copy(src[3], dest[3]);
+}
+
+/*!
+ * @brief Zero out the mat4x2 (m).
+ *
+ * @param[in, out] mat4x2 (src, dest)
+ */
+CGLM_INLINE
+void
+glm_mat4x2_zero(mat4x2 m) {
+ CGLM_ALIGN_MAT mat4x2 t = GLM_MAT4X2_ZERO_INIT;
+ glm_mat4x2_copy(t, m);
+}
+
+/*!
+ * @brief Create mat4x2 (dest) from pointer (src).
+ *
+ * @param[in] src pointer to an array of floats (left)
+ * @param[out] dest destination (result, mat4x2)
+ */
+CGLM_INLINE
+void
+glm_mat4x2_make(const float * __restrict src, mat4x2 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];
+
+ dest[3][0] = src[6];
+ dest[3][1] = src[7];
+}
+
+/*!
+ * @brief Multiply mat4x2 (m1) by mat2x4 (m2) and store in mat2 (dest).
+ *
+ * @code
+ * glm_mat4x2_mul(mat4x2, mat2x4, mat2);
+ * @endcode
+ *
+ * @param[in] m1 mat4x2 (left)
+ * @param[in] m2 mat2x4 (right)
+ * @param[out] dest destination (result, mat2)
+ */
+CGLM_INLINE
+void
+glm_mat4x2_mul(mat4x2 m1, mat2x4 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],
+ a30 = m1[3][0], a31 = m1[3][1],
+
+ b00 = m2[0][0], b01 = m2[0][1], b02 = m2[0][2], b03 = m2[0][3],
+ b10 = m2[1][0], b11 = m2[1][1], b12 = m2[1][2], b13 = m2[1][3];
+
+ dest[0][0] = a00 * b00 + a10 * b01 + a20 * b02 + a30 * b03;
+ dest[0][1] = a01 * b00 + a11 * b01 + a21 * b02 + a31 * b03;
+
+ dest[1][0] = a00 * b10 + a10 * b11 + a20 * b12 + a30 * b13;
+ dest[1][1] = a01 * b10 + a11 * b11 + a21 * b12 + a31 * b13;
+}
+
+/*!
+ * @brief Multiply mat4x2 (m) by vec4 (v) and store in vec2 (dest).
+ *
+ * @param[in] m mat4x2 (left)
+ * @param[in] v vec4 (right, column vector)
+ * @param[out] dest destination (result, column vector)
+ */
+CGLM_INLINE
+void
+glm_mat4x2_mulv(mat4x2 m, vec4 v, vec2 dest) {
+ float v0 = v[0], v1 = v[1], v2 = v[2], v3 = v[3];
+
+ dest[0] = m[0][0] * v0 + m[1][0] * v1 + m[2][0] * v2 + m[3][0] * v3;
+ dest[1] = m[0][1] * v0 + m[1][1] * v1 + m[2][1] * v2 + m[3][1] * v3;
+}
+
+/*!
+ * @brief Transpose mat4x2 (src) and store in mat2x4 (dest).
+ *
+ * @param[in] src mat4x2 (left)
+ * @param[out] dest destination (result, mat2x4)
+ */
+CGLM_INLINE
+void
+glm_mat4x2_transpose(mat4x2 m, mat2x4 dest) {
+ dest[0][0] = m[0][0]; dest[0][1] = m[1][0]; dest[0][2] = m[2][0]; dest[0][3] = m[3][0];
+ dest[1][0] = m[0][1]; dest[1][1] = m[1][1]; dest[1][2] = m[2][1]; dest[1][3] = m[3][1];
+}
+
+/*!
+ * @brief Multiply mat4x2 (m) by scalar constant (s).
+ *
+ * @param[in, out] m (src, dest)
+ * @param[in] s float (scalar)
+ */
+CGLM_INLINE
+void
+glm_mat4x2_scale(mat4x2 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; m[3][0] *= s; m[3][1] *= s;
+}
+
+#endif