+mathlib

1 files changed, 138 insertions, 0 deletions

diff --git a/src/shaders/common/mathlib.c b/src/shaders/common/mathlib.c
new file mode 100644
index 0000000..356357c
--- /dev/null
+++ b/src/shaders/common/mathlib.c
@@ -0,0 +1,138 @@
+#include "mathlib.h"
+#include "../../math/math.h"
+
+#define INTERNAL_FUNCTION(T, NAME)\
+T NAME(T v1, T v2) {\
+	T out; \
+	internal_##NAME(&v1, &v2, &out);\
+	return out;\
+}
+
+/************************************************************************/
+/* Vec2                                                                 */
+/************************************************************************/
+Vec2 vec2(float x, float y) {
+	Vec2 v = {x, y};
+	return v;
+}
+
+INTERNAL_FUNCTION(Vec2, vec2_minus);
+INTERNAL_FUNCTION(Vec2, vec2_plus);
+
+float vec2_dot(Vec2 v1, Vec2 v2) {
+	return internal_vec2_dot(&v1, &v2);
+}
+
+/************************************************************************/
+/* Vec3                                                                 */
+/************************************************************************/
+Vec3 vec3(float x, float y, float z) {
+	Vec3 v = {x, y, z};  
+	return v;
+}
+
+INTERNAL_FUNCTION(Vec3, vec3_minus);
+INTERNAL_FUNCTION(Vec3, vec3_plus);
+INTERNAL_FUNCTION(Vec3, vec3_cross);
+
+float vec3_dot(Vec3 v1, Vec3 v2) {
+	return internal_vec3_dot(&v1, &v2);
+}
+
+Vec3 vec3_lerp(Vec3 v1, Vec3 v2, float t) {
+	Vec3 out; 
+	internal_vec3_lerp(&v1, &v2, t, &out);
+	return out;
+}
+
+Vec3 vec3_slerp(Vec3 v1, Vec3 v2, float t) {
+	Vec3 out;
+	internal_vec3_slerp(&v1, &v2, t, &out);
+	return out;
+}
+
+Vec3 vec3_scale(Vec3 v, float scale) {
+	Vec3 out; 
+	internal_vec3_scale(&v, scale, &out);
+	return out;
+}
+
+Vec3 vec3_normalize(Vec3 v) {
+	Vec3 out; 
+	internal_vec3_normalize(&v, &out);
+	return out;
+}
+
+/************************************************************************/
+/* Vec4                                                                 */
+/************************************************************************/
+
+Vec4 vec4(float x, float y, float z, float w) {
+	Vec4 v = {x, y, z, w};
+	return v;
+}
+
+INTERNAL_FUNCTION(Vec4, vec4_minus);
+INTERNAL_FUNCTION(Vec4, vec4_plus);
+
+Vec4 vec4_scale(Vec4 v, float scale) {
+	Vec4 out; 
+	internal_vec4_scale(&v, scale, &out);	
+	return out;
+}
+
+Vec4 vec4_saturate(Vec4 v) {
+	Vec4 out;
+	out.x = clamp(v.x, 0, 1);
+	out.y = clamp(v.y, 0, 1);
+	out.z = clamp(v.z, 0, 1);
+	out.w = clamp(v.w, 0, 1);
+	return out;
+}
+
+/************************************************************************/
+/* Matrix                                                               */
+/************************************************************************/
+
+Mat3 mat3(Vec3 c1, Vec3 c2, Vec3 c3) {
+	Mat3 m = {c1, c2, c3};
+	return m;
+}
+
+Vec3 mat3_mulvec3(Mat3 m, Vec3 v) {
+	Vec3 out; 
+	internal_mat3_multvec3(&m, &v, &out);
+	return out;
+}
+
+Mat3 mat3_mulmat3(Mat3 m, Mat3 m2) {
+	Mat3 out; 
+	internal_mat3_multmat3(&m, &m2, &out);
+	return out;
+}
+
+Mat4 mat4(Vec4 c1, Vec4 c2, Vec4 c3, Vec4 c4) {
+	Mat4 m ;
+	m.axisx = c1;
+	m.axisy = c2;
+	m.axisz = c3;
+	m.pos = c4;
+	return m;
+}
+
+Vec3 mat4_mulvec3(Mat4 m, Vec3 v) {
+	Vec4 v2 = {v.x, v.y, v.z, 0};
+	return mat4_mulvec4(m, v2).xyz;
+}
+
+Vec4 mat4_mulvec4(Mat4 m, Vec4 v) {
+	Vec4 out;
+	internal_mat4_mulvec4(&m, &v, &out);
+	return out;
+}
+
+Mat4 mat4_mulmat4(Mat4 m1, Mat4 m2) {
+	Mat4 out;
+	internal_mat4_multiply(&m1, &m2, &out);
+	return out;
+}