Billboard

[xcross]

Billboard not show full but it show half.

[img]http://spic.uploadd.com/2032/E75/small/35AF59CEB2QWPEV4U[GQIIK5ARG6L[test.jpg[/img]

Code: Select all

#include <irrlicht.h>

using namespace irr;
using namespace core;
using namespace scene;
using namespace video;
using namespace io;
using namespace gui;

#pragma comment(lib, "Irrlicht.lib")

IrrlichtDevice *device;

bool shoot=false;
class MyEventReceiver : public IEventReceiver
{
public:
	bool OnEvent(const SEvent& event)
	{

	if (event.EventType == EET_KEY_INPUT_EVENT &&
		event.KeyInput.Key == KEY_ESCAPE &&
		event.KeyInput.PressedDown == false)
	{
		device->closeDevice();
		return true;
	}
	if (event.EventType == EET_MOUSE_INPUT_EVENT &&
		event.MouseInput.Event == EMIE_LMOUSE_PRESSED_DOWN)
	{
		shoot=true;
		return true;
	}
		shoot=false;
		return false;
	}
};

int main()
{
	MyEventReceiver receiver;

	device = createDevice(EDT_DIRECT3D9,dimension2d<s32>(800,600),32,
		true, false, false,&receiver);

	IVideoDriver* driver = device->getVideoDriver();
	ISceneManager* smgr = device->getSceneManager();
	IGUIEnvironment* env = device->getGUIEnvironment();

	IAnimatedMesh* mesh = smgr->getMesh("map.b3d");
	ISceneNode* node;
	
	device->getCursorControl()->setVisible(false); 

	node = smgr->addOctTreeSceneNode(mesh->getMesh(0));
	node->setPosition(vector3df(0,-50,0));
	
	ITriangleSelector* selector;

	selector = smgr->createOctTreeTriangleSelector(mesh->getMesh(0), node, 32);
	node->setTriangleSelector(selector);
	env->addImage(driver->getTexture("cur.png"),position2d<s32>(385,285));


	SKeyMap keyMap[4];
     
                 keyMap[0].Action = EKA_MOVE_FORWARD;
                 keyMap[0].KeyCode = KEY_KEY_W;
                 keyMap[1].Action = EKA_MOVE_BACKWARD;
                 keyMap[1].KeyCode = KEY_KEY_S;
                 keyMap[2].Action = EKA_STRAFE_LEFT;
                 keyMap[2].KeyCode = KEY_KEY_A;
                 keyMap[3].Action = EKA_STRAFE_RIGHT;
                 keyMap[3].KeyCode = KEY_KEY_D;

	ICameraSceneNode* camera =smgr->addCameraSceneNodeFPS(0,100,300,-1,keyMap,4);
	camera->setPosition(vector3df(0,50,0));

	
	ISceneNodeAnimator* anim =smgr->createCollisionResponseAnimator(
		selector, camera, vector3df(30,30,30),
		vector3df(0,-2,0),
		vector3df(0,30,0));
		camera->addAnimator(anim);
		selector->drop();
		anim->drop();

	IBillboardSceneNode * bill = smgr->addBillboardSceneNode();
	bill->setMaterialType(EMT_TRANSPARENT_ADD_COLOR );
	bill->setMaterialTexture(0, driver->getTexture("bull.bmp"));
	bill->setMaterialFlag(video::EMF_LIGHTING, false);
	bill->setSize(dimension2d<f32>(10.0f, 10.0f));

	while(device->run())
	if (device->isWindowActive())
	{
		driver->beginScene(true, true, SColor(0,0,0,100));
		smgr->drawAll();
		env->drawAll();

		line3d<f32> line;
		line.start = camera->getPosition();
		line.end = line.start +(camera->getTarget() - line.start).normalize() * 1000.0f;
		
		vector3df intersection;
		triangle3df tri;

		if (smgr->getSceneCollisionManager()->getCollisionPoint(
			line, selector, intersection ,tri))
		{
			if(shoot==true){
				bill->setPosition(intersection);
			}
		}
		driver->endScene();
	}
	device->drop();
	return 0;
}

[monkeycracks]

It's because you're not looking at the wall straight-on I think. Billboards allways face the camera, and that would result in half of the billboard going through the wall.

[Kalango]

You could also disable the zwriting for the custom scene node, so it will ignore depht proprieties.... its a maetrial flag....

Code: Select all

bill->setMaterialFlag(video::EMF_ZWRITESOMETHING, false);

As for the hard way, you could try to write a plane that is always normal to the surface that its casted...so it'll be a plane and not a billboard....
As for the hardest way, you could try Pixel shaders (doing texture projection)

[xcross]

Thanks.
for Shader I can't use.
I am beginer not Professional.

Do you think Billboard is a good for my game ?

[Cloudef]

What are you trying to do?