+mathlib

1 files changed, 30 insertions, 0 deletions

diff --git a/src/shaders/common/core.c b/src/shaders/common/core.c
new file mode 100644
index 0000000..703458c
--- /dev/null
+++ b/src/shaders/common/core.c
@@ -0,0 +1,30 @@
+#include "core.h"
+
+Vec4 _proj_params;
+Vec2 _time;
+Vec4 _screen_params;
+
+Vec3 unpacknormal(Color32 c32) {
+	Vec3 normal = {
+		c32.r * 2 - 1,
+		c32.g * 2 - 1,
+		c32.b * 2 - 1,
+	};
+	return normal;
+}
+
+Mat4 mat4(Vec4* c1, Vec4* c2, Vec4* c3, Vec4* c4);
+
+Vec2 texsize(Texture* texture) {
+	Vec2 size = {texture->width, texture->height};
+	return size;
+}
+
+float linear01depth(float depth) {
+	float n = _proj_params.x, f = _proj_params.y;
+	return n / ((n-f)*depth + f);
+}
+
+float lineareyedepth(float depth) {
+	return _proj_params.y * linear01depth(depth);
+}
\ No newline at end of file