Move object nametags to camera

9 files changed, 138 insertions, 54 deletions

diff --git a/src/camera.cpp b/src/camera.cpp
index 94bbe9880..8aac32123 100644
--- a/src/camera.cpp
+++ b/src/camera.cpp
@@ -34,6 +34,7 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "util/numeric.h"
 #include "util/mathconstants.h"
 #include "constants.h"
+#include "fontengine.h"
 
 #define CAMERA_OFFSET_STEP 200
 
@@ -81,6 +82,7 @@ Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
 {
 	//dstream<<FUNCTION_NAME<<std::endl;
 
+	m_driver = smgr->getVideoDriver();
 	// note: making the camera node a child of the player node
 	// would lead to unexpected behaviour, so we don't do that.
 	m_playernode = smgr->addEmptySceneNode(smgr->getRootSceneNode());
@@ -110,6 +112,7 @@ Camera::Camera(scene::ISceneManager* smgr, MapDrawControl& draw_control,
 	m_cache_wanted_fps          = g_settings->getFloat("wanted_fps");
 	m_cache_fov                 = g_settings->getFloat("fov");
 	m_cache_view_bobbing        = g_settings->getBool("view_bobbing");
+	m_nametags.clear();
 }
 
 Camera::~Camera()
@@ -662,3 +665,49 @@ void Camera::drawWieldedTool(irr::core::matrix4* translation)
 	}
 	m_wieldmgr->drawAll();
 }
+
+void Camera::drawNametags()
+{
+	core::matrix4 trans = m_cameranode->getProjectionMatrix();
+	trans *= m_cameranode->getViewMatrix();
+
+	for (std::list<Nametag *>::const_iterator
+			i = m_nametags.begin();
+			i != m_nametags.end(); ++i) {
+		Nametag *nametag = *i;
+		v3f pos = nametag->parent_node->getPosition() -
+			intToFloat(m_camera_offset, BS) + v3f(0.0, 1.1 * BS, 0.0);
+		f32 transformed_pos[4] = { pos.X, pos.Y, pos.Z, 1.0f };
+		trans.multiplyWith1x4Matrix(transformed_pos);
+		if (transformed_pos[3] > 0) {
+			core::dimension2d<u32> textsize =
+				g_fontengine->getFont()->getDimension(
+				utf8_to_wide(nametag->nametag_text).c_str());
+			f32 zDiv = transformed_pos[3] == 0.0f ? 1.0f :
+				core::reciprocal(transformed_pos[3]);
+			v2u32 screensize = m_driver->getScreenSize();
+			v2s32 screen_pos;
+			screen_pos.X = screensize.X *
+				(0.5 * transformed_pos[0] * zDiv + 0.5) - textsize.Width / 2;
+			screen_pos.Y = screensize.Y *
+				(0.5 - transformed_pos[1] * zDiv * 0.5) - textsize.Height / 2;
+			core::rect<s32> size(0, 0, textsize.Width, textsize.Height);
+			g_fontengine->getFont()->draw(utf8_to_wide(nametag->nametag_text).c_str(),
+					size + screen_pos, nametag->nametag_color);
+		}
+	}
+}
+
+Nametag *Camera::addNametag(scene::ISceneNode *parent_node,
+		std::string nametag_text, video::SColor nametag_color)
+{
+	Nametag *nametag = new Nametag(parent_node, nametag_text, nametag_color);
+	m_nametags.push_back(nametag);
+	return nametag;
+}
+
+void Camera::removeNametag(Nametag *nametag)
+{
+	m_nametags.remove(nametag);
+	delete nametag;
+}
diff --git a/src/camera.h b/src/camera.h
index 006f4b3ce..2df7da2b8 100644
--- a/src/camera.h
+++ b/src/camera.h
@@ -26,6 +26,8 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "client/tile.h"
 #include "util/numeric.h"
 #include <ICameraSceneNode.h>
+#include <ISceneNode.h>
+#include <list>
 
 #include "client.h"
 
@@ -34,6 +36,20 @@ struct MapDrawControl;
 class IGameDef;
 class WieldMeshSceneNode;
 
+struct Nametag {
+	Nametag(scene::ISceneNode *a_parent_node,
+			const std::string &a_nametag_text,
+			const video::SColor &a_nametag_color):
+		parent_node(a_parent_node),
+		nametag_text(a_nametag_text),
+		nametag_color(a_nametag_color)
+	{
+	}
+	scene::ISceneNode *parent_node;
+	std::string nametag_text;
+	video::SColor nametag_color;
+};
+
 enum CameraMode {CAMERA_MODE_FIRST, CAMERA_MODE_THIRD, CAMERA_MODE_THIRD_FRONT};
 
 /*
@@ -84,7 +100,7 @@ public:
 	{
 		return m_camera_direction;
 	}
-	
+
 	// Get the camera offset
 	inline v3s16 getOffset() const
 	{
@@ -151,6 +167,13 @@ public:
 		return m_camera_mode;
 	}
 
+	Nametag *addNametag(scene::ISceneNode *parent_node,
+		std::string nametag_text, video::SColor nametag_color);
+
+	void removeNametag(Nametag *nametag);
+
+	void drawNametags();
+
 private:
 	// Nodes
 	scene::ISceneNode* m_playernode;
@@ -162,8 +185,9 @@ private:
 
 	// draw control
 	MapDrawControl& m_draw_control;
-	
+
 	IGameDef *m_gamedef;
+	video::IVideoDriver *m_driver;
 
 	// Absolute camera position
 	v3f m_camera_position;
@@ -214,6 +238,8 @@ private:
 	f32 m_cache_wanted_fps;
 	f32 m_cache_fov;
 	bool m_cache_view_bobbing;
+
+	std::list<Nametag *> m_nametags;
 };
 
 #endif
diff --git a/src/client.cpp b/src/client.cpp
index ed5ff96fe..3fe67d645 100644
--- a/src/client.cpp
+++ b/src/client.cpp
@@ -228,6 +228,7 @@ Client::Client(
 	m_particle_manager(&m_env),
 	m_con(PROTOCOL_ID, 512, CONNECTION_TIMEOUT, ipv6, this),
 	m_device(device),
+	m_camera(NULL),
 	m_minimap_disabled_by_server(false),
 	m_server_ser_ver(SER_FMT_VER_INVALID),
 	m_proto_ver(0),
diff --git a/src/client.h b/src/client.h
index c16e9b77a..cdadb9d3e 100644
--- a/src/client.h
+++ b/src/client.h
@@ -50,6 +50,7 @@ struct PointedThing;
 class Database;
 class Mapper;
 struct MinimapMapblock;
+class Camera;
 
 struct QueuedMeshUpdate
 {
@@ -507,6 +508,12 @@ public:
 	Mapper* getMapper ()
 	{ return m_mapper; }
 
+	void setCamera(Camera* camera)
+	{ m_camera = camera; }
+
+	Camera* getCamera ()
+	{ return m_camera; }
+
 	bool isMinimapDisabledByServer()
 	{ return m_minimap_disabled_by_server; }
 
@@ -589,6 +596,7 @@ private:
 	ParticleManager m_particle_manager;
 	con::Connection m_con;
 	IrrlichtDevice *m_device;
+	Camera *m_camera;
 	Mapper *m_mapper;
 	bool m_minimap_disabled_by_server;
 	// Server serialization version
diff --git a/src/content_cao.cpp b/src/content_cao.cpp
index e7c7a0be5..d701e4f72 100644
--- a/src/content_cao.cpp
+++ b/src/content_cao.cpp
@@ -546,12 +546,14 @@ GenericCAO::GenericCAO(IGameDef *gamedef, ClientEnvironment *env):
 		//
 		m_smgr(NULL),
 		m_irr(NULL),
+		m_camera(NULL),
+		m_gamedef(NULL),
 		m_selection_box(-BS/3.,-BS/3.,-BS/3., BS/3.,BS/3.,BS/3.),
 		m_meshnode(NULL),
 		m_animated_meshnode(NULL),
 		m_wield_meshnode(NULL),
 		m_spritenode(NULL),
-		m_textnode(NULL),
+		m_nametag(NULL),
 		m_position(v3f(0,10*BS,0)),
 		m_velocity(v3f(0,0,0)),
 		m_acceleration(v3f(0,0,0)),
@@ -580,8 +582,11 @@ GenericCAO::GenericCAO(IGameDef *gamedef, ClientEnvironment *env):
 		m_last_light(255),
 		m_is_visible(false)
 {
-	if(gamedef == NULL)
+	if (gamedef == NULL) {
 		ClientActiveObject::registerType(getType(), create);
+	} else {
+		m_gamedef = gamedef;
+	}
 }
 
 bool GenericCAO::getCollisionBox(aabb3f *toset)
@@ -667,8 +672,7 @@ void GenericCAO::initialize(const std::string &data)
 
 GenericCAO::~GenericCAO()
 {
-	if(m_is_player)
-	{
+	if (m_is_player) {
 		m_env->removePlayerName(m_name.c_str());
 	}
 	removeFromScene(true);
@@ -695,14 +699,15 @@ v3f GenericCAO::getPosition()
 
 scene::ISceneNode* GenericCAO::getSceneNode()
 {
-	if (m_meshnode)
+	if (m_meshnode) {
 		return m_meshnode;
-	if (m_animated_meshnode)
+	} else if (m_animated_meshnode) {
 		return m_animated_meshnode;
-	if (m_wield_meshnode)
+	} else if (m_wield_meshnode) {
 		return m_wield_meshnode;
-	if (m_spritenode)
+	} else if (m_spritenode) {
 		return m_spritenode;
+	}
 	return NULL;
 }
 
@@ -775,56 +780,47 @@ void GenericCAO::removeFromScene(bool permanent)
 		}
 	}
 
-	if(m_meshnode)
-	{
+	if (m_meshnode) {
 		m_meshnode->remove();
 		m_meshnode->drop();
 		m_meshnode = NULL;
-	}
-	if(m_animated_meshnode)
-	{
+	} else if (m_animated_meshnode)	{
 		m_animated_meshnode->remove();
 		m_animated_meshnode->drop();
 		m_animated_meshnode = NULL;
-	}
-	if(m_wield_meshnode)
-	{
+	} else if (m_wield_meshnode) {
 		m_wield_meshnode->remove();
 		m_wield_meshnode->drop();
 		m_wield_meshnode = NULL;
-	}
-	if(m_spritenode)
-	{
+	} else if (m_spritenode) {
 		m_spritenode->remove();
 		m_spritenode->drop();
 		m_spritenode = NULL;
 	}
-	if (m_textnode)
-	{
-		m_textnode->remove();
-		m_textnode->drop();
-		m_textnode = NULL;
+
+	if (m_nametag) {
+		m_gamedef->getCamera()->removeNametag(m_nametag);
+		m_nametag = NULL;
 	}
 }
 
-void GenericCAO::addToScene(scene::ISceneManager *smgr, ITextureSource *tsrc,
-		IrrlichtDevice *irr)
+void GenericCAO::addToScene(scene::ISceneManager *smgr, 
+		ITextureSource *tsrc, IrrlichtDevice *irr)
 {
 	m_smgr = smgr;
 	m_irr = irr;
 
-	if (getSceneNode() != NULL)
+	if (getSceneNode() != NULL) {
 		return;
+	}
 
 	m_visuals_expired = false;
 
-	if(!m_prop.is_visible)
+	if (!m_prop.is_visible) {
 		return;
+	}
 
-	//video::IVideoDriver* driver = smgr->getVideoDriver();
-
-	if(m_prop.visual == "sprite")
-	{
+	if (m_prop.visual == "sprite") {
 		infostream<<"GenericCAO::addToScene(): single_sprite"<<std::endl;
 		m_spritenode = smgr->addBillboardSceneNode(
 				NULL, v2f(1, 1), v3f(0,0,0), -1);
@@ -972,18 +968,9 @@ void GenericCAO::addToScene(scene::ISceneManager *smgr, ITextureSource *tsrc,
 
 	scene::ISceneNode *node = getSceneNode();
 	if (node && m_prop.nametag != "" && !m_is_local_player) {
-		// Add a text node for showing the name
-		gui::IGUIEnvironment* gui = irr->getGUIEnvironment();
-		std::wstring nametag_text = utf8_to_wide(m_prop.nametag);
-		m_textnode = smgr->addTextSceneNode(gui->getSkin()->getFont(),
-				nametag_text.c_str(), m_prop.nametag_color, node);
-		m_textnode->grab();
-		m_textnode->setPosition(v3f(0, BS*1.1, 0));
-
-		// Enforce hiding nametag,
-		// because if freetype is enabled, a grey
-		// shadow can remain.
-		m_textnode->setVisible(m_prop.nametag_color.getAlpha() > 0);
+		// Add nametag
+		m_nametag = m_gamedef->getCamera()->addNametag(node,
+			m_prop.nametag, m_prop.nametag_color);
 	}
 
 	updateNodePos();
@@ -1785,12 +1772,8 @@ void GenericCAO::processMessage(const std::string &data)
 		// Deprecated, for backwards compatibility only.
 		readU8(is); // version
 		m_prop.nametag_color = readARGB8(is);
-		if (m_textnode != NULL) {
-			m_textnode->setTextColor(m_prop.nametag_color);
-
-			// Enforce hiding nametag,
-			// because if freetype is enabled, a grey shadow can remain.
-			m_textnode->setVisible(m_prop.nametag_color.getAlpha() > 0);
+		if (m_nametag != NULL) {
+			m_nametag->nametag_color = m_prop.nametag_color;
 		}
 	}
 }
diff --git a/src/content_cao.h b/src/content_cao.h
index f71dfeb1f..a166ff494 100644
--- a/src/content_cao.h
+++ b/src/content_cao.h
@@ -26,6 +26,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
 #include "object_properties.h"
 #include "itemgroup.h"
 
+class Camera;
+struct Nametag;
+
 /*
 	SmoothTranslator
 */
@@ -65,12 +68,14 @@ private:
 	//
 	scene::ISceneManager *m_smgr;
 	IrrlichtDevice *m_irr;
+	Camera* m_camera;
+	IGameDef *m_gamedef;
 	aabb3f m_selection_box;
 	scene::IMeshSceneNode *m_meshnode;
 	scene::IAnimatedMeshSceneNode *m_animated_meshnode;
 	WieldMeshSceneNode *m_wield_meshnode;
 	scene::IBillboardSceneNode *m_spritenode;
-	scene::ITextSceneNode* m_textnode;
+	Nametag* m_nametag;
 	v3f m_position;
 	v3f m_velocity;
 	v3f m_acceleration;
diff --git a/src/drawscene.cpp b/src/drawscene.cpp
index 32eafeb29..c6abda4ac 100644
--- a/src/drawscene.cpp
+++ b/src/drawscene.cpp
@@ -195,7 +195,7 @@ video::ITexture*  draw_hud(video::IVideoDriver* driver, const v2u32& screensize,
 			hud.drawCrosshair();
 		hud.drawHotbar(client.getPlayerItem());
 		hud.drawLuaElements(camera.getOffset());
-
+		camera.drawNametags();
 		guienv->drawAll();
 	}
 
@@ -416,6 +416,7 @@ void draw_pageflip_3d_mode(Camera& camera, bool show_hud,
 			camera.drawWieldedTool(&leftMove);
 		hud.drawHotbar(client.getPlayerItem());
 		hud.drawLuaElements(camera.getOffset());
+		camera.drawNametags();
 	}
 
 	guienv->drawAll();
@@ -443,6 +444,7 @@ void draw_pageflip_3d_mode(Camera& camera, bool show_hud,
 			camera.drawWieldedTool(&rightMove);
 		hud.drawHotbar(client.getPlayerItem());
 		hud.drawLuaElements(camera.getOffset());
+		camera.drawNametags();
 	}
 
 	guienv->drawAll();
@@ -538,8 +540,11 @@ void draw_scene(video::IVideoDriver *driver, scene::ISceneManager *smgr,
 	{
 		if (draw_crosshair)
 			hud.drawCrosshair();
+
 		hud.drawHotbar(client.getPlayerItem());
 		hud.drawLuaElements(camera.getOffset());
+		camera.drawNametags();
+
 		if (show_minimap)
 			mapper.drawMinimap();
 	}
diff --git a/src/game.cpp b/src/game.cpp
index 44b35ff5b..53db14fb3 100644
--- a/src/game.cpp
+++ b/src/game.cpp
@@ -2087,6 +2087,7 @@ bool Game::createClient(const std::string &playername,
 	camera = new Camera(smgr, *draw_control, gamedef);
 	if (!camera || !camera->successfullyCreated(*error_message))
 		return false;
+	client->setCamera(camera);
 
 	/* Clouds
 	 */
diff --git a/src/gamedef.h b/src/gamedef.h
index a5f6b5968..7e3da4cac 100644
--- a/src/gamedef.h
+++ b/src/gamedef.h
@@ -32,6 +32,8 @@ class IShaderSource;
 class MtEventManager;
 class IRollbackManager;
 class EmergeManager;
+class Camera;
+
 namespace irr { namespace scene {
 	class IAnimatedMesh;
 	class ISceneManager;
@@ -67,6 +69,10 @@ public:
 	{ return NULL; }
 	virtual scene::ISceneManager* getSceneManager()=0;
 
+	virtual Camera* getCamera()
+	{ return NULL; }
+	virtual void setCamera(Camera *camera) {}
+
 	// Only usable on the server, and NOT thread-safe. It is usable from the
 	// environment thread.
 	virtual IRollbackManager* getRollbackManager(){return NULL;}