#include "/Lib/Settings.glsl"
#include "/Lib/Utilities.glsl"
// MinecraftPT — End Sky
// End dimension sky: stars, planet, accretion disc around black hole.

#ifndef END_SKY_GLSL
#define END_SKY_GLSL

vec3 GetEndSky(vec3 dir, vec3 sunDir){
	dir = normalize(dir);

	// Dark base
	vec3 color = vec3(0.01, 0.01, 0.02);

	// Stars (hash-based)
	float stars = 0.0;
	vec3 starDir = dir;
	for (int i = 0; i < 32; i++){
		vec3 seed = vec3(i * 0.1, 0.5, 0.7);
		vec3 starPos = normalize(hash3(seed.xy) - 0.5);
		float star = exp(-(1.0 - dot(dir, starPos)) * 1000.0);
		stars += star * hash1(seed.xy);
	}
	color += stars * 0.5;

	// Planet (distant body)
	vec3 planetDir = normalize(vec3(0.5, 0.3, 0.0));
	float planet = exp(-(1.0 - dot(dir, planetDir)) * 200.0);
	color += vec3(0.3, 0.4, 0.6) * planet * 0.8;

	// Accretion disc (around planet)
	float disc = exp(-abs(dot(normalize(dir.xz), normalize(planetDir.xz))) * 50.0);
	disc *= step(abs(dir.y), 0.1);
	color += vec3(1.0, 0.6, 0.2) * disc * 0.5;

	return color;
}

#endif