irrlicht/examples/16.Quake3MapShader/main.cpp

/** Example 016 Quake3 Map Shader Support

This tutorial shows how to load a Quake 3 map into the
engine, create a SceneNode for optimizing the speed of
rendering and how to create a user controlled camera.

Lets start like the HelloWorld example: We include
the irrlicht header files and an additional file to be able
to ask the user for a driver type using the console.
*/
#include <irrlicht.h>
#include "driverChoice.h"
#include "exampleHelper.h"

/*
	define which Quake3 Level should be loaded
*/
#define IRRLICHT_QUAKE3_ARENA
//#define ORIGINAL_QUAKE3_ARENA
//#define CUSTOM_QUAKE3_ARENA
//#define SHOW_SHADER_NAME

#ifdef ORIGINAL_QUAKE3_ARENA
	#define QUAKE3_STORAGE_FORMAT	addFolderFileArchive
	#define QUAKE3_STORAGE_1		"/baseq3/"
	#ifdef CUSTOM_QUAKE3_ARENA
		#define QUAKE3_STORAGE_2	"/cf/"
		#define QUAKE3_MAP_NAME		"maps/cf.bsp"
	#else
		#define QUAKE3_MAP_NAME			"maps/q3dm8.bsp"
	#endif
#endif

#ifdef IRRLICHT_QUAKE3_ARENA
	#define QUAKE3_STORAGE_FORMAT	addFileArchive
	#define QUAKE3_STORAGE_1	getExampleMediaPath() + "map-20kdm2.pk3"
	#define QUAKE3_MAP_NAME			"maps/20kdm2.bsp"
#endif

using namespace irr;
using namespace scene;

/*
Again, to be able to use the Irrlicht.DLL file, we need to link with the
Irrlicht.lib. We could set this option in the project settings, but
to make it easy, we use a pragma comment lib:
*/
#ifdef _MSC_VER
#pragma comment(lib, "Irrlicht.lib")
#endif


/*
A class to produce a series of screenshots
*/
class CScreenShotFactory : public IEventReceiver
{
public:

	CScreenShotFactory( IrrlichtDevice *device, const c8 * templateName, ISceneNode* node )
		: Device(device), Number(0), FilenameTemplate(templateName), Node(node)
	{
		FilenameTemplate.replace ( '/', '_' );
		FilenameTemplate.replace ( '\\', '_' );
	}

	bool OnEvent(const SEvent& event)
	{
		// check if user presses the key F9
		if ((event.EventType == EET_KEY_INPUT_EVENT) &&
				event.KeyInput.PressedDown)
		{
			if (event.KeyInput.Key == KEY_F9)
			{
				video::IImage* image = Device->getVideoDriver()->createScreenShot();
				if (image)
				{
					c8 buf[256];
					snprintf_irr(buf, 256, "%s_shot%04d.jpg",
							FilenameTemplate.c_str(),
							++Number);
					Device->getVideoDriver()->writeImageToFile(image, buf, 85 );
					image->drop();
				}
			}
			else
			if (event.KeyInput.Key == KEY_F8)
			{
				if (Node->isDebugDataVisible())
					Node->setDebugDataVisible(scene::EDS_OFF);
				else
					Node->setDebugDataVisible(scene::EDS_BBOX_ALL);
			}
		}
		return false;
	}

private:
	IrrlichtDevice *Device;
	u32 Number;
	core::stringc FilenameTemplate;
	ISceneNode* Node;
};


/*
Ok, lets start.
*/

int IRRCALLCONV main(int argc, char* argv[])
{
	/*
	Like in the HelloWorld example, we create an IrrlichtDevice with
	createDevice(). The difference now is that we ask the user to select
	which hardware accelerated driver to use. The Software device would be
	too slow to draw a huge Quake 3 map, but just for the fun of it, we make
	this decision possible too.
	*/

	// ask user for driver
	video::E_DRIVER_TYPE driverType=driverChoiceConsole();
	if (driverType==video::EDT_COUNT)
		return 1;

	// create device and exit if creation failed
	const core::dimension2du videoDim(800,600);

	IrrlichtDevice *device = createDevice(driverType, videoDim, 32, false );

	if (device == 0)
		return 1; // could not create selected driver.

	const char* mapname=0;
	if (argc>2)
		mapname = argv[2];
	else
		mapname = QUAKE3_MAP_NAME;

	/*
	Get a pointer to the video driver and the SceneManager so that
	we do not always have to write device->getVideoDriver() and
	device->getSceneManager().
	*/
	video::IVideoDriver* driver = device->getVideoDriver();
	scene::ISceneManager* smgr = device->getSceneManager();
	gui::IGUIEnvironment* gui = device->getGUIEnvironment();

	const io::path mediaPath = getExampleMediaPath();

	//! add our private media directory to the file system
	device->getFileSystem()->addFileArchive(mediaPath);

	/*
	To display the Quake 3 map, we first need to load it. Quake 3 maps
	are packed into .pk3 files, which are nothing other than .zip files.
	So we add the .pk3 file to our FileSystem. After it was added,
	we are able to read from the files in that archive as they would
	directly be stored on disk.
	*/
	if (argc>2)
		device->getFileSystem()->QUAKE3_STORAGE_FORMAT(argv[1]);
	else
		device->getFileSystem()->QUAKE3_STORAGE_FORMAT(QUAKE3_STORAGE_1);
#ifdef QUAKE3_STORAGE_2
	device->getFileSystem()->QUAKE3_STORAGE_FORMAT(QUAKE3_STORAGE_2);
#endif

	// Quake3 Shader controls Z-Writing
	smgr->getParameters()->setAttribute(scene::ALLOW_ZWRITE_ON_TRANSPARENT, true);

	/*
	Now we can load the mesh by calling getMesh(). We get a pointer returned
	to a IAnimatedMesh. As you know, Quake 3 maps are not really animated,
	they are only a huge chunk of static geometry with some materials
	attached. Hence the IAnimated mesh consists of only one frame,
	so we get the "first frame" of the "animation", which is our quake level
	and create an Octree scene node with it, using addOctreeSceneNode().
	The Octree optimizes the scene a little bit, trying to draw only geometry
	which is currently visible. An alternative to the Octree would be a
	AnimatedMeshSceneNode, which would draw always the complete geometry of
	the mesh, without optimization. Try it out: Write addAnimatedMeshSceneNode
	instead of addOctreeSceneNode and compare the primitives drawn by the
	video driver. (There is a getPrimitiveCountDrawed() method in the
	IVideoDriver class). Note that this optimization with the Octree is only
	useful when drawing huge meshes consisting of lots of geometry.
	*/
	scene::IQ3LevelMesh* const mesh =
		(scene::IQ3LevelMesh*) smgr->getMesh(mapname);

	/*
		add the geometry mesh to the Scene ( polygon & patches )
		The Geometry mesh is optimised for faster drawing
	*/
	scene::ISceneNode* node = 0;
	if (mesh)
	{
		scene::IMesh * const geometry = mesh->getMesh(quake3::E_Q3_MESH_GEOMETRY);
		node = smgr->addOctreeSceneNode(geometry, 0, -1, 4096);
	}

	// create an event receiver for making screenshots
	CScreenShotFactory screenshotFactory(device, mapname, node);
	device->setEventReceiver(&screenshotFactory);

	/*
		now construct SceneNodes for each Shader
		The Objects are stored in the quake mesh scene::E_Q3_MESH_ITEMS
		and the Shader ID is stored in the MaterialParameters
		mostly dark looking skulls and moving lava.. or green flashing tubes?
	*/
	if ( mesh )
	{
		// the additional mesh can be quite huge and is unoptimized
		const scene::IMesh * const additional_mesh = mesh->getMesh(quake3::E_Q3_MESH_ITEMS);

#ifdef SHOW_SHADER_NAME
		gui::IGUIFont *font = device->getGUIEnvironment()->getFont(mediaPath + "fontlucida.png");
		u32 count = 0;
#endif

		for ( u32 i = 0; i!= additional_mesh->getMeshBufferCount(); ++i )
		{
			const IMeshBuffer* meshBuffer = additional_mesh->getMeshBuffer(i);
			const video::SMaterial& material = meshBuffer->getMaterial();

			// The ShaderIndex is stored in the material parameter
			const s32 shaderIndex = (s32) material.MaterialTypeParam2;

			// the meshbuffer can be rendered without additional support, or it has no shader
			const quake3::IShader *shader = mesh->getShader(shaderIndex);
			if (0 == shader)
			{
				continue;
			}

			// we can dump the shader to the console in its
			// original but already parsed layout in a pretty
			// printers way.. commented out, because the console
			// would be full...
			// quake3::dumpShader ( Shader );

			node = smgr->addQuake3SceneNode(meshBuffer, shader);

#ifdef SHOW_SHADER_NAME
			count += 1;
			core::stringw name( node->getName() );
			node = smgr->addBillboardTextSceneNode(
					font, name.c_str(), node,
					core::dimension2d<f32>(80.0f, 8.0f),
					core::vector3df(0, 10, 0));
#endif
		}
	}

	/*
	Now we only need a Camera to look at the Quake 3 map. And we want to
	create a user controlled camera. There are some different cameras
	available in the Irrlicht engine. For example the Maya Camera which can
	be controlled comparable to the camera in Maya: Rotate with left mouse
	button pressed, Zoom with both buttons pressed, translate with right
	mouse button pressed. This could be created with
	addCameraSceneNodeMaya(). But for this example, we want to create a
	camera which behaves like the ones in first person shooter games (FPS).
	*/

	scene::ICameraSceneNode* camera = smgr->addCameraSceneNodeFPS();

	/*
		so we need a good starting Position in the level.
		we can ask the Quake3 Loader for all entities with class_name
		"info_player_deathmatch"
		we choose a random launch
	*/
	if ( mesh )
	{
		quake3::tQ3EntityList &entityList = mesh->getEntityList();

		quake3::IEntity search;
		search.name = "info_player_deathmatch";

		s32 index = entityList.binary_search(search);
		if (index >= 0)
		{
			s32 notEndList;
			do
			{
				const quake3::SVarGroup *group = entityList[index].getGroup(1);

				u32 parsepos = 0;
				const core::vector3df pos =
					quake3::getAsVector3df(group->get("origin"), parsepos);

				parsepos = 0;
				const f32 angle = quake3::getAsFloat(group->get("angle"), parsepos);

				core::vector3df target(0.f, 0.f, 1.f);
				target.rotateXZBy(angle);

				camera->setPosition(pos);
				camera->setTarget(pos + target);

				++index;
/*
				notEndList = (	index < (s32) entityList.size () &&
								entityList[index].name == search.name &&
								(device->getTimer()->getRealTime() >> 3 ) & 1
							);
*/
				notEndList = index == 2;
			} while ( notEndList );
		}
	}

	/*
	The mouse cursor needs not to be visible, so we make it invisible.
	*/

	device->getCursorControl()->setVisible(false);

	// load the engine logo
	gui->addImage(driver->getTexture("irrlichtlogo3.png"),
			core::position2d<s32>(10, 10));

	// show the driver logo
	const core::position2di pos(videoDim.Width - 128, videoDim.Height - 64);

	switch ( driverType )
	{
		case video::EDT_BURNINGSVIDEO:
			gui->addImage(driver->getTexture("burninglogo.png"), pos);
			break;
		case video::EDT_OPENGL:
			gui->addImage(driver->getTexture("opengllogo.png"), pos);
			break;
		case video::EDT_DIRECT3D9:
			gui->addImage(driver->getTexture("directxlogo.png"), pos);
			break;
	}

	/*
	We have done everything, so lets draw it. We also write the current
	frames per second and the drawn primitives to the caption of the
	window. The 'if (device->isWindowActive())' line is optional, but
	prevents the engine render to set the position of the mouse cursor
	after task switching when other program are active.
	*/
	int lastFPS = -1;

	while(device->run())
	if (device->isWindowActive())
	{
		driver->beginScene(video::ECBF_COLOR | video::ECBF_DEPTH, video::SColor(255,20,20,40));
		smgr->drawAll();
		gui->drawAll();
		driver->endScene();

		int fps = driver->getFPS();
		//if (lastFPS != fps)
		{
			io::IAttributes * const attr = smgr->getParameters();
			core::stringw str = L"Q3 [";
			str += driver->getName();
			str += "] FPS:";
			str += fps;
#ifdef _IRR_SCENEMANAGER_DEBUG			
			str += " Cull:";
			str += attr->getAttributeAsInt("calls");
			str += "/";
			str += attr->getAttributeAsInt("culled");
			str += " Draw: ";
			str += attr->getAttributeAsInt("drawn_solid");
			str += "/";
			str += attr->getAttributeAsInt("drawn_transparent");
			str += "/";
			str += attr->getAttributeAsInt("drawn_transparent_effect");
#endif
			device->setWindowCaption(str.c_str());
			lastFPS = fps;
		}
	}

	/*
	In the end, delete the Irrlicht device.
	*/
	device->drop();

	return 0;
}

/*
**/