Q to drop

client/client.ts

@@ -138,6 +138,9 @@ export class Client {
 				this.pop_screen();
 			}
 		}
+		if (InputManager.is_key_pressed(options.key_drop)) {
+			this.#handle_drop();
+		}
 		if (InputManager.is_key_pressed(options.key_chat) && !this.screen) {
 			this.push_screen(new GuiChat(this));
 		}
@@ -165,6 +168,24 @@ export class Client {
 		}
 	}
 
+	// the held item while playing, the slot under the mouse in an inventory (only with nothing on the cursor)
+	#handle_drop() {
+		const all = InputManager.is_key_down("ControlLeft") || InputManager.is_key_down("ControlRight");
+		const inventories = this.player.inventories;
+		const screen = this.screen;
+		if (!screen) {
+			this.game_mode.drop_item(inventories.inventory, "inventory", inventories.hotbar_selected, all);
+			return;
+		}
+		const slot = screen instanceof GuiInventoryScreen ? screen.hovering : undefined;
+		const container = slot && screen instanceof GuiInventoryScreen
+			? screen.get_container(slot.container)
+			: undefined;
+		if (slot && container && !slot.output && !inventories.cursor.item) {
+			this.game_mode.drop_item(container, slot.container, slot.index, all);
+		}
+	}
+
 	// clicks happen right away, holding to break advances in tick()
 	#handle_block_interaction() {
 		const hit = this.hit_result;

client/game_mode.ts

@@ -2,6 +2,8 @@ import { BlockRegistry, EverythingRegistry, ItemRegistry } from "$/common/everyt
 import { AIR, FACE_OFFSETS, TICK_DELTA } from "$/common/constants.ts";
 import type { Client } from "./client.ts";
 import type { BlockHitResult } from "./level/client_level.ts";
+import type { Container } from "$/common/inventory.ts";
+import type { ContainerKey } from "$/common/protocol.ts";
 
 // breaking and using blocks against a server, like minecraft's MultiPlayerGameMode. the client times breaking
 // and guesses the results so they feel instant, the server decides what really happens
@@ -68,6 +70,17 @@ export class MultiPlayerGameMode {
 		}
 	}
 
+	// q on a slot: throws one, or the whole stack. the server spawns the item, this only takes it out right away
+	drop_item(container: Container, key: ContainerKey, index: number, all: boolean) {
+		const item = container.get_item(index);
+		if (!item) {
+			return;
+		}
+		this.client.connection.send({ type: "drop_item", container: key, index, all });
+		item.amount = all ? 0 : item.amount - 1;
+		container.set_item(index, item.amount > 0 ? item : undefined);
+	}
+
 	// right click on nothing
 	use_item() {
 		this.client.connection.send({ type: "use_item" });

client/options.ts

@@ -11,6 +11,8 @@ export class Options {
 	key_jump: KeyCode = "Space";
 	key_sprint: KeyCode = "ShiftLeft";
 	key_inventory: KeyCode = "KeyE";
+	// with ctrl it drops the whole stack
+	key_drop: KeyCode = "KeyQ";
 	key_chat: KeyCode = "KeyT";
 	key_debug: KeyCode = "F3";
 	key_fullscreen: KeyCode = "F11";