// Roblox in Godot 4.4 - sky shader with seam fix

shader_type sky;

uniform sampler2D front : source_color, repeat_disable;
uniform sampler2D back : source_color, repeat_disable;
uniform sampler2D left : source_color, repeat_disable;
uniform sampler2D right : source_color, repeat_disable;
uniform sampler2D top : source_color, repeat_disable;
uniform sampler2D bottom : source_color, repeat_disable;

void sky() {
	COLOR = EYEDIR;
	vec3 absvec = abs(EYEDIR);
	float ma = max(max(absvec.x, absvec.y), absvec.z);
	vec3 dir = EYEDIR / (ma + 0.0001);
	
	if (EYEDIR.x <= -ma) {
		COLOR = texture(left, dir.zy * vec2(-0.5, -0.5) + 0.5).rgb;
	}
	if (EYEDIR.x >= ma) {
		COLOR = texture(right, dir.zy * vec2(0.5, -0.5) + 0.5).rgb;
	}
	if (EYEDIR.z >= ma) {
		COLOR = texture(front, dir.xy * vec2(-0.5, -0.5) + 0.5).rgb;
	}
	if (EYEDIR.z <= -ma) {
		COLOR = texture(back, dir.xy * vec2(0.5, -0.5) + 0.5).rgb;
	}
	if (EYEDIR.y >= ma) {
		COLOR = texture(top, dir.zx * vec2(0.5, 0.5) + 0.5).rgb;
	}
	if (EYEDIR.y <= -ma) {
		COLOR = texture(bottom, dir.zx * vec2(0.5, -0.5) + 0.5).rgb;
	}
}