Moved shaders to new directory

shaders/glsl/instancing/starfield.frag

@@ -0,0 +1,34 @@
+#version 450
+
+layout (location = 0) in vec3 inUVW;
+
+layout (location = 0) out vec4 outFragColor;
+
+#define HASHSCALE3 vec3(443.897, 441.423, 437.195)
+#define STARFREQUENCY 0.01
+
+// Hash function by Dave Hoskins (https://www.shadertoy.com/view/4djSRW)
+float hash33(vec3 p3)
+{
+	p3 = fract(p3 * HASHSCALE3);
+	p3 += dot(p3, p3.yxz+vec3(19.19));
+	return fract((p3.x + p3.y)*p3.z + (p3.x+p3.z)*p3.y + (p3.y+p3.z)*p3.x);
+}
+
+vec3 starField(vec3 pos)
+{
+	vec3 color = vec3(0.0);
+	float threshhold = (1.0 - STARFREQUENCY);
+	float rnd = hash33(pos);
+	if (rnd >= threshhold)
+	{
+		float starCol = pow((rnd - threshhold) / (1.0 - threshhold), 16.0);
+		color += vec3(starCol);
+	}	
+	return color;
+}
+
+void main() 
+{
+	outFragColor = vec4(starField(inUVW), 1.0);
+}