Irrlicht Engine

Code: Select all

	while(device->run())
	if (device->isWindowActive())
	{

		//Work out where we are and what needs to be drawn

		v = camera->getAbsolutePosition();

		int curXTerrain = (int) v.X/9600;

		int curZTerrain = abs((int) v.Z/9600);

		curZTerrain = (v.Z < 0?curZTerrain+1:curZTerrain);

		int XStart = 0;		
		int XFinish = NUMBER_OF_ROWS-1;

		if (v.X <= 0){
			v.X = 0;
			XStart = 0;
			XFinish = 1;
		}else if(curXTerrain > (NUMBER_OF_ROWS-1)){
			v.X = NUMBER_OF_ROWS * LENGTH_OF_TERRAIN ;
			XStart = curXTerrain-1;
			XFinish = (NUMBER_OF_ROWS-1);
		}

		
		XStart = curXTerrain-2;
		XFinish = curXTerrain + 2;

		XStart = (XStart <= 0?0:XStart);
		XFinish = (XFinish >= (NUMBER_OF_ROWS-1)?(NUMBER_OF_ROWS-1):XFinish);

		int ZStart = 0;		
		int ZFinish = NUMBER_OF_COLS-1;


		if (v.Z > LENGTH_OF_TERRAIN){
			v.Z = LENGTH_OF_TERRAIN;
			ZStart = 0;
		}else if(curZTerrain > (NUMBER_OF_COLS-1)){
			v.Z = (NUMBER_OF_COLS-1) * -LENGTH_OF_TERRAIN ;
			ZFinish = (NUMBER_OF_COLS-1);
		}
		
		ZStart = curZTerrain-2;
		ZFinish = curZTerrain + 2;

		ZStart = (ZStart <= 0?0:ZStart);
		ZFinish = (ZFinish >= (NUMBER_OF_COLS-1)?(NUMBER_OF_COLS-1):XFinish);

		
		camera->setPosition(v);

		for(int row= XStart; row <= XFinish; row++){
		for(int col= ZStart; col <= ZFinish; col++){
			
			terrain[col][row]->setVisible(true);

		}
		}

		
		driver->beginScene(true, true, 0 );

		smgr->drawAll();
		env->drawAll();

		driver->endScene();


		
		for(int row= XStart; row <= XFinish; row++){
		for(int col= ZStart; col <= ZFinish; col++){
			
			terrain[col][row]->setVisible(false);
			terrain[col][row]->setMaterialType(video::EMT_DETAIL_MAP);

		}
		}


		bool useXStart = false;

		int Diffrence = XStart - curXTerrain;
		if (Diffrence > 1 || Diffrence < -1){
			useXStart=true;
		}

		bool useXFinish = false;

		Diffrence = XFinish - curXTerrain;
		if (Diffrence > 1 || Diffrence < -1){
			useXFinish=true;
		}

		//Remove detail on the edges
		for(int col= ZStart; col <= ZFinish; col++){
			if(useXStart)
				terrain[col][XStart]->setMaterialType(video::EMT_SOLID);
			

			
			if (useXFinish)
				terrain[col][XFinish]->setMaterialType(video::EMT_SOLID);
			
		}


		// display frames per second in window title
		
		int fps = driver->getFPS();

		core::stringw str = L"Terrain Renderer - Irrlicht Engine [";
		str += driver->getName();
		str += "] FPS:";
		str += fps;

		str += " ";
		str += curXTerrain;
		str += " ";
		str += (int)(v.X);
		str += ",";
		str += curZTerrain; 
		str += " ";
		str += (int)(v.Z);
			
		str += " ";
		str += (XFinish-curZTerrain);

			
			

		device->setWindowCaption(str.c_str());
		lastFPS = fps;
	}