refactor res/shaders

res/shaders/lib/constants.glsl

@@ -0,0 +1,15 @@
+#ifndef CONSTANTS_GLSL_
+#define CONSTANTS_GLSL_
+
+// geometry
+#define CURVATURE_FACTOR 0.002
+
+// lighting
+#define SKY_LIGHT_MUL 2.5
+#define SKY_LIGHT_TINT vec3(0.9, 0.8, 1.0)
+#define MAX_SKY_LIGHT vec3(0.1, 0.11, 0.14)
+
+// fog
+#define FOG_POS_SCALE vec3(1.0, 0.2, 1.0)
+
+#endif // CONSTANTS_GLSL_