Tilemap cell UV

A small utility to get the cell UV coordinates in a tilemap

Shader code

shader_type canvas_item;

// The size of each square cell normalized
// So if your cell is 8px by 8px the value should be 1.0 / 8.0
// if your cell is 16px by 16px the value should be 1.0 / 16.0
const float tile_size = 1.0 / 8.0;

vec2 get_cell_uv(vec2 uv, vec2 pixel_size) {
	vec2 ut = uv;
	ut.x = mod(1.0 - uv.x, pixel_size.x / tile_size) / pixel_size.x * tile_size;
	ut.y = mod(1.0 - uv.y, pixel_size.y / tile_size) / pixel_size.y * tile_size;
	
	return ut;
}

void fragment() {
	vec2 cell_uv = get_cell_uv(UV, TEXTURE_PIXEL_SIZE);
	COLOR = vec4(cell_uv.x, cell_uv.y, 0.0, 1.0);
}shader_type canvas_item;

// The size of each square cell normalized
// So if your cell is 8px by 8px the value should be 1.0 / 8.0
// if your cell is 16px by 16px the value should be 1.0 / 16.0
const float tile_size = 1.0 / 8.0;

vec2 get_cell_uv(vec2 uv, vec2 pixel_size) {
	vec2 ut = uv;
	ut.x = mod(1.0 - uv.x, pixel_size.x / tile_size) / pixel_size.x * tile_size;
	ut.y = mod(1.0 - uv.y, pixel_size.y / tile_size) / pixel_size.y * tile_size;
	
	return ut;
}

void fragment() {
	vec2 cell_uv = get_cell_uv(UV, TEXTURE_PIXEL_SIZE);
	COLOR = vec4(cell_uv.x, cell_uv.y, 0.0, 1.0);
}

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