Add a key to toggle map block bounds (#11172)

It's often useful to know where the map block boundaries are for doing server admin work and the like.
Adds three modes: single mapblock, range of 5, and disabled.

src/client/game.cpp

@@ -1932,6 +1932,8 @@ void Game::processKeyInput()
 		toggleCinematic();
 	} else if (wasKeyDown(KeyType::SCREENSHOT)) {
 		client->makeScreenshot();
+	} else if (wasKeyDown(KeyType::TOGGLE_BLOCK_BOUNDS)) {
+		hud->toggleBlockBounds();
 	} else if (wasKeyDown(KeyType::TOGGLE_HUD)) {
 		m_game_ui->toggleHud();
 	} else if (wasKeyDown(KeyType::MINIMAP)) {

src/client/hud.cpp

@@ -862,6 +862,54 @@ void Hud::drawSelectionMesh()
 	}
 }
 
+void Hud::toggleBlockBounds()
+{
+	m_block_bounds_mode = static_cast<BlockBoundsMode>(m_block_bounds_mode + 1);
+
+	if (m_block_bounds_mode >= BLOCK_BOUNDS_MAX) {
+		m_block_bounds_mode = BLOCK_BOUNDS_OFF;
+	}
+}
+
+void Hud::drawBlockBounds()
+{
+	if (m_block_bounds_mode == BLOCK_BOUNDS_OFF) {
+		return;	
+	}
+
+	video::SMaterial old_material = driver->getMaterial2D();
+	driver->setMaterial(m_selection_material);
+
+	v3s16 pos = player->getStandingNodePos();
+
+	v3s16 blockPos(
+		floorf((float) pos.X / MAP_BLOCKSIZE),
+		floorf((float) pos.Y / MAP_BLOCKSIZE),
+		floorf((float) pos.Z / MAP_BLOCKSIZE)
+	);
+
+	v3f offset = intToFloat(client->getCamera()->getOffset(), BS);
+
+	s8 radius = m_block_bounds_mode == BLOCK_BOUNDS_ALL ? 2 : 0;
+
+	v3f halfNode = v3f(BS, BS, BS) / 2.0f;
+
+	for (s8 x = -radius; x <= radius; x++)
+	for (s8 y = -radius; y <= radius; y++)
+	for (s8 z = -radius; z <= radius; z++) {
+		v3s16 blockOffset(x, y, z);
+
+		aabb3f box(
+			intToFloat((blockPos + blockOffset) * MAP_BLOCKSIZE, BS) - offset - halfNode,
+			intToFloat(((blockPos + blockOffset) * MAP_BLOCKSIZE) + (MAP_BLOCKSIZE - 1), BS) - offset + halfNode
+		);
+
+		driver->draw3DBox(box, video::SColor(255, 255, 0, 0));
+	}
+
+	driver->setMaterial(old_material);
+}
+
 void Hud::updateSelectionMesh(const v3s16 &camera_offset)
 {
 	m_camera_offset = camera_offset;

src/client/hud.h

@@ -59,6 +59,9 @@ public:
 			Inventory *inventory);
 	~Hud();
 
+	void toggleBlockBounds();
+	void drawBlockBounds();
+
 	void drawHotbar(u16 playeritem);
 	void resizeHotbar();
 	void drawCrosshair();
@@ -125,6 +128,14 @@ private:
 
 	scene::SMeshBuffer m_rotation_mesh_buffer;
 
+	enum BlockBoundsMode
+	{
+		BLOCK_BOUNDS_OFF,
+		BLOCK_BOUNDS_CURRENT,
+		BLOCK_BOUNDS_ALL,
+		BLOCK_BOUNDS_MAX
+	} m_block_bounds_mode = BLOCK_BOUNDS_OFF;
+
 	enum
 	{
 		HIGHLIGHT_BOX,

src/client/inputhandler.cpp

@@ -60,6 +60,7 @@ void KeyCache::populate()
 	key[KeyType::DEC_VOLUME] = getKeySetting("keymap_decrease_volume");
 	key[KeyType::CINEMATIC] = getKeySetting("keymap_cinematic");
 	key[KeyType::SCREENSHOT] = getKeySetting("keymap_screenshot");
+	key[KeyType::TOGGLE_BLOCK_BOUNDS] = getKeySetting("keymap_toggle_block_bounds");
 	key[KeyType::TOGGLE_HUD] = getKeySetting("keymap_toggle_hud");
 	key[KeyType::TOGGLE_CHAT] = getKeySetting("keymap_toggle_chat");
 	key[KeyType::TOGGLE_FOG] = getKeySetting("keymap_toggle_fog");

src/client/keys.h

@@ -59,6 +59,7 @@ public:
 		DEC_VOLUME,
 		CINEMATIC,
 		SCREENSHOT,
+		TOGGLE_BLOCK_BOUNDS,
 		TOGGLE_HUD,
 		TOGGLE_CHAT,
 		TOGGLE_FOG,

src/client/render/core.cpp

@@ -76,6 +76,7 @@ void RenderingCore::draw3D()
 	driver->setTransform(video::ETS_WORLD, core::IdentityMatrix);
 	if (!show_hud)
 		return;
+	hud->drawBlockBounds();
 	hud->drawSelectionMesh();
 	if (draw_wield_tool)
 		camera->drawWieldedTool();

src/defaultsettings.cpp

@@ -97,6 +97,7 @@ void set_default_settings()
 	settings->setDefault("keymap_increase_volume", "");
 	settings->setDefault("keymap_decrease_volume", "");
 	settings->setDefault("keymap_cinematic", "");
+	settings->setDefault("keymap_toggle_block_bounds", "");
 	settings->setDefault("keymap_toggle_hud", "KEY_F1");
 	settings->setDefault("keymap_toggle_chat", "KEY_F2");
 	settings->setDefault("keymap_toggle_fog", "KEY_F3");

src/gui/guiKeyChangeMenu.cpp

@@ -70,6 +70,7 @@ enum
 	GUI_ID_KEY_MINIMAP_BUTTON,
 	GUI_ID_KEY_SCREENSHOT_BUTTON,
 	GUI_ID_KEY_CHATLOG_BUTTON,
+	GUI_ID_KEY_BLOCK_BOUNDS_BUTTON,
 	GUI_ID_KEY_HUD_BUTTON,
 	GUI_ID_KEY_FOG_BUTTON,
 	GUI_ID_KEY_DEC_RANGE_BUTTON,
@@ -442,6 +443,7 @@ void GUIKeyChangeMenu::init_keys()
 	this->add_key(GUI_ID_KEY_CONSOLE_BUTTON,      wgettext("Console"),          "keymap_console");
 	this->add_key(GUI_ID_KEY_CMD_BUTTON,          wgettext("Command"),          "keymap_cmd");
 	this->add_key(GUI_ID_KEY_CMD_LOCAL_BUTTON,    wgettext("Local command"),    "keymap_cmd_local");
+	this->add_key(GUI_ID_KEY_BLOCK_BOUNDS_BUTTON, wgettext("Block bounds"),     "keymap_toggle_block_bounds");
 	this->add_key(GUI_ID_KEY_HUD_BUTTON,          wgettext("Toggle HUD"),       "keymap_toggle_hud");
 	this->add_key(GUI_ID_KEY_CHATLOG_BUTTON,      wgettext("Toggle chat log"),  "keymap_toggle_chat");
 	this->add_key(GUI_ID_KEY_FOG_BUTTON,          wgettext("Toggle fog"),       "keymap_toggle_fog");