Lighting system

common/everything_registry.ts

@@ -98,6 +98,16 @@ interface BlockStateVariant {
 export const RENDER_LAYERS = ["solid", "cutout", "translucent"] as const;
 export type RenderLayer = typeof RENDER_LAYERS[number];
 
+// like minecraft: solid blocks stop light, everything else lets it through unless it says otherwise
+export function block_light_opacity(block: BlockRegistry | undefined): number {
+	if (!block) return 0;
+	return block.light_opacity ?? ((block.render_layer ?? "solid") === "solid" ? 15 : 0);
+}
+
+export function block_light_emission(block: BlockRegistry | undefined): number {
+	return block?.light_emission ?? 0;
+}
+
 export interface BlockRegistry {
 	id: string;
 	textures: string | TextureSideTopBottom | TextureFront;
@@ -105,6 +115,10 @@ export interface BlockRegistry {
 	render_layer?: RenderLayer;
 	// hide faces between two of this block, like glass and water. defaults to true for translucent blocks
 	cull_same?: boolean;
+	// light level 0-15 it gives off
+	light_emission?: number;
+	// how much light going through it loses, 0-15. see block_light_opacity for the default
+	light_opacity?: number;
 	alpha?: number;
 
 	has_collision: boolean;