shader_type canvas_item;

uniform float tile_count;

const int chunk_size = 32;

uniform bool borders = true;
const float border_size = 0.01;

uniform int tiles[chunk_size*chunk_size];
uniform int items[chunk_size*chunk_size];
uniform int arrows[chunk_size*chunk_size];

uniform sampler2DArray tile_texture : filter_nearest_mipmap;
uniform sampler2DArray item_texture : filter_nearest;
uniform sampler2DArray arrow_texture : filter_nearest;

void fragment() {
	COLOR = vec4(0,0,0,0);
	int arrow_id = arrows[int(floor(float(chunk_size) * UV.x) + float(chunk_size) * floor(float(chunk_size) * UV.y))];
	if (arrow_id != -1){
		COLOR = texture(arrow_texture,
			vec3(mod(UV.x * float(chunk_size), 1.0), mod(UV.y * float(chunk_size), 1.0), float(arrow_id)) // map
		);
	}

	if (COLOR == vec4(0,0,0,0)){
		int item_id = items[int(floor(float(chunk_size) * UV.x) + float(chunk_size) * floor(float(chunk_size) * UV.y))];
		if (item_id != -1){
			COLOR = texture(item_texture,
				vec3(mod(UV.x * float(chunk_size), 1.0), mod(UV.y * float(chunk_size), 1.0), float(item_id)) // map
			);
		}
	}
	if (COLOR == vec4(0,0,0,0)){
		int tile_id = tiles[int(floor(float(chunk_size) * UV.x) + float(chunk_size) * floor(float(chunk_size) * UV.y))];
		COLOR = texture(tile_texture,
			vec3(mod(UV.x * float(chunk_size), 1.0), mod(UV.y * float(chunk_size), 1.0), float(tile_id)) // map
		);
	}

	if (borders){
		if(
			UV.x < border_size || UV.x > 1.0-border_size ||
			UV.y < border_size || UV.y > 1.0-border_size
			){
			COLOR -= vec4(0.1,0.1,0.1,0);
		}
	}
}