Q to drop

server/game/game_server.ts

@@ -310,6 +310,26 @@ export class GameServer {
 		return entity;
 	}
 
+	// out of the player's face the way they're looking, like minecraft's Player.drop
+	throw_item(player: ServerPlayer, stack: ItemStack) {
+		const entity = this.spawn_item(
+			player.x,
+			player.y + PLAYER_EYE_HEIGHT - 0.3,
+			player.z,
+			stack,
+			PLAYER_DROP_PICKUP_DELAY,
+		);
+		// minecraft's numbers are per tick
+		const speed = 0.3 * TICKS_PER_SECOND;
+		const cos_pitch = Math.cos(player.pitch);
+		const spread_angle = Math.random() * Math.PI * 2;
+		const spread = Math.random() * 0.02 * TICKS_PER_SECOND;
+		entity.vx = -Math.sin(player.yaw) * cos_pitch * speed + Math.cos(spread_angle) * spread;
+		entity.vy = Math.sin(player.pitch) * speed + (0.1 + (Math.random() - Math.random()) * 0.1) * TICKS_PER_SECOND;
+		entity.vz = -Math.cos(player.yaw) * cos_pitch * speed + Math.sin(spread_angle) * spread;
+		return entity;
+	}
+
 	item_entities(): ItemEntity[] {
 		return [...this.#entities.values()];
 	}
@@ -504,6 +524,9 @@ export class GameServer {
 			case "click":
 				this.#click(player, message.container, message.index, message.button);
 				break;
+			case "drop_item":
+				this.#drop_item(player, message.container, message.index, message.all === true);
+				break;
 			case "close_screen":
 				this.#close_screen(player);
 				break;
@@ -645,6 +668,32 @@ export class GameServer {
 		this.mods.after.block_place.emit(place);
 	}
 
+	#drop_item(player: ServerPlayer, key: unknown, index: unknown, all: boolean) {
+		if (!is_int(index)) {
+			return;
+		}
+		const container = this.#get_container(player, key as ContainerKey);
+		// the crafting result isn't an item yet, minecraft crafts it first but that's not supported
+		if (
+			!container || index < 0 || index >= container.size || (key === "crafting" && index === CRAFTING_RESULT_SLOT)
+		) {
+			return;
+		}
+		const item = container.get_item(index);
+		if (!item) {
+			return;
+		}
+
+		const thrown = item.clone();
+		thrown.amount = all ? item.amount : 1;
+		item.amount -= thrown.amount;
+		container.set_item(index, item.amount > 0 ? item : undefined);
+		if (key === "crafting") {
+			update_crafting_result(container, this.recipes.shaped);
+		}
+		this.throw_item(player, thrown);
+	}
+
 	#click(player: ServerPlayer, key: unknown, index: unknown, button: unknown) {
 		if (!is_int(index) || !is_int(button)) {
 			return;