C++ ISceneNode::getAbsolutePosition方法代码示例

void VesselSceneNode::snap(OrbiterDockingPort& ourPort, OrbiterDockingPort& theirPort)
{

	ISceneNode* ourNode = ourPort.portNode;
	ISceneNode* theirNode = theirPort.portNode;

	theirNode->updateAbsolutePosition();
	ourNode->updateAbsolutePosition();

	//absolute rotation of the target port
	core::matrix4 theirMatrix = theirNode->getAbsoluteTransformation();

	//Origin up and facing (inversed) of the target port
	core::vector3df theirDir = core::vector3df(0, 0, -1);
	core::vector3df theirRot = core::vector3df(0, 1, 0);

	//get absolute inversed facing and up direction of the target port
	theirMatrix.rotateVect(theirDir);
	theirMatrix.rotateVect(theirRot);
	theirDir.normalize();
	theirRot.normalize();

	//build rotation matrix to rotate from the ORIGIN of the source port to their ports current alignement
	core::matrix4 ourPortToTheirPort;
	ourPortToTheirPort.buildCameraLookAtMatrixLH(core::vector3df(0, 0, 0), theirDir, theirRot).makeInverse();

	//get inverted source port rotation relative to its vessel
	core::matrix4 ourVesselToOurPort = ourNode->getRelativeTransformation();
	ourVesselToOurPort.makeInverse();

	//multiply the rotation from our vessel origin to our port and from our port origin to the target to get the total transformation for the vessel
	core::matrix4 ourVesselToTheirPort = ourPortToTheirPort * ourVesselToOurPort;

	//apply the whole brouhaha
	setRotation(ourVesselToTheirPort.getRotationDegrees());

	//we MUST update positions for getAbsolutePosition to reflect the rotation we just did.
	//also, we MUST update the position of the parent before the child, or the child still won't reflect the changes
	//we also MUST update the child seperately, it doesn't get updated by the parent
	updateAbsolutePosition();
	ourNode->updateAbsolutePosition();

	//position the vessel so the docking ports touch
	core::vector3df pos = ourNode->getAbsolutePosition() - getAbsolutePosition();
	setPosition(theirNode->getAbsolutePosition() - pos);
	//update the new position, in case there's a vessel being snapped to this right next
	updateAbsolutePosition();				
}

	int Java_zte_irrlib_scene_SceneNode_nativeUpdatePosition(
		JNIEnv*  env, jobject defaultObj, jobject jvec, jboolean isAbsolute, jint Id)
	{
		ISceneNode* node = smgr->getSceneNodeFromId(Id);
		if (!node) 
		{
			WARN_NODE_NOT_FOUND(Id, UpdatePosition);
			return -1;
		}
		if (isAbsolute)
		{
			node->updateAbsolutePosition();
			utils->setVector3dFromvector3df(env, jvec, node->getAbsolutePosition());
		}
		else utils->setVector3dFromvector3df(env, jvec, node->getPosition());
		return 0;
	}

	int Java_zte_irrlib_scene_SceneNode_nativeAddCollisionResponseAnimator(
		JNIEnv *env, jobject defaultObj, jint selId, jobject jradius, jboolean bbox, jboolean octree, jint id)
	{
		ISceneNode* selNode = smgr->getSceneNodeFromId(selId);
		if (!selNode)
		{
			WARN_NODE_NOT_FOUND(selId, AddCollisionResponseAnimator);
			return -1;
		}
		
		ISceneNode* node = smgr->getSceneNodeFromId(id);
		if (!node)
		{
			WARN_NODE_NOT_FOUND(id, AddCollisionResponseAnimator);
			return -1;
		}
		
		ITriangleSelector* selector = 0;
		if (bbox) selector = smgr->createTriangleSelectorFromBoundingBox(selNode);
		else if (!octree) selector = smgr->createTriangleSelector(((IMeshSceneNode*)selNode)->getMesh(), selNode);
		else selector = smgr->createTriangleSelector(((IMeshSceneNode*)selNode)->getMesh(), selNode);
		
		node->updateAbsolutePosition();
		const aabbox3d<f32>& box = node->getTransformedBoundingBox();
		
		vector3df radius;
		if (jradius == 0)
			radius = box.MaxEdge-box.getCenter();
		else radius = utils->createvector3dfFromVector3d(env, jradius);
		
		vector3df translation = -(box.getCenter() - node->getAbsolutePosition());
		
		//LOGD("max, %f, %f, %f", box.MaxEdge.X, box.MaxEdge.Y, box.MaxEdge.Z);
		//LOGD("min, %f, %f, %f", box.MinEdge.X, box.MinEdge.Y, box.MinEdge.Z);
		//LOGD("trans, %f, %f, %f", translation.X, translation.Y, translation.Z);
		ISceneNodeAnimator* anim = smgr->createCollisionResponseAnimator(selector, node,
			radius,
			vector3df(),/*gravity*/
			translation,
			0.0005f
		);
		selector->drop();
		node->addAnimator(anim);
		anim->drop();
	}

int main(int argc, char** argv) {
	CustomEventReceiver receiver;
	IrrlichtDevice *device = createDevice( video::EDT_OPENGL, dimension2d<u32>(800, 600), 16, false, false, false, &receiver);
	if (!device) {
		return EXIT_FAILURE;
    }
	device->setWindowCaption(L"Solar System Simulator");
	IVideoDriver* driver = device->getVideoDriver();
	ISceneManager* sceneManager = device->getSceneManager();
	scene::ISceneCollisionManager* collisionManager= sceneManager->getSceneCollisionManager();
	IGUIEnvironment* guiEnv = device->getGUIEnvironment();
	guiEnv->addStaticText(L"Click on a planet to attach the camera to it", rect<s32>(10,10,260,22), false);

	sf::SoundBuffer buffer;
	if (buffer.loadFromFile(currentPath() + "/sounds/burning.aif")) {
		sf::Listener::setPosition(0, 0,0);

		sf::Sound sound;
		sound.setBuffer(buffer);
		sound.setPosition(0, 0, 0);
		sound.setLoop(true);
		sound.play();
	}

	const char* spaceTexturePath = ( currentPath() + "/textures/space.jpg" ).c_str();
	video::ITexture* space = driver->getTexture(spaceTexturePath);
	scene::ISceneNode* skybox = sceneManager->addSkyBoxSceneNode(space, space, space, space, space, space);

	sceneManager->addLightSceneNode(0, vector3df(0, 0, -50),  video::SColorf(1.0f, 1.0f, 1.0f), 50.0f, 1001);

	PlanetFactory planetFactory(sceneManager, driver);
	Planet sun = planetFactory.create(PlanetId::Sun);
	Planet earth = planetFactory.create(PlanetId::Earth);
	Planet pluto = planetFactory.create(PlanetId::Pluto);
	Planet jupiter = planetFactory.create(PlanetId::Jupiter);
	Planet uranus = planetFactory.create(PlanetId::Uranus);
	Planet neptune = planetFactory.create(PlanetId::Neptune);

	vector<Planet> planets = { sun, planetFactory.create(PlanetId::Mercury) };
	planets.push_back(planetFactory.create(PlanetId::Venus));
	planets.push_back(earth);
	planets.push_back(planetFactory.create(PlanetId::Mars));
	planets.push_back(jupiter);
	planets.push_back(planetFactory.create(PlanetId::Saturn));
	planets.push_back(uranus);
	planets.push_back(neptune);
	planets.push_back(pluto);

	ICameraSceneNode* camera = sceneManager->addCameraSceneNode(0, vector3df(0,0,40), vector3df(0,0,0));
	rect<s32> mainCameraViewPortRect(0, 0, 800, 600);

	ICameraSceneNode* topViewCamera = sceneManager->addCameraSceneNode(0, vector3df(0,50,0), vector3df(0,0,0));
	
	sceneManager->setAmbientLight(video::SColorf(255.0,255.0,255.0));

	ISceneNode* selectedNode = sun.node;
	while(device->run()) {

		if(receiver.GetMouseState().LeftButtonDown) {
			position2di mousepos = receiver.GetMouseState().Position;
			line3df ray = sceneManager->getSceneCollisionManager()->getRayFromScreenCoordinates( mousepos, camera);

			vector3df intersection;
			triangle3df tri;

            for(Planet& planet : planets) {
				ITriangleSelector* wselector = sceneManager->createTriangleSelectorFromBoundingBox(planet.node);
				if (collisionManager->getCollisionPoint(ray, wselector, intersection, tri, planet.node)) {
					selectedNode = planet.node;
				}
				wselector->drop();
			}
		}

		camera->setTarget(selectedNode->getAbsolutePosition());

		skybox->setVisible(true);		
        
		driver->setViewPort(mainCameraViewPortRect);
		driver->beginScene(true, true, SColor(255,100,101,140));
		sceneManager->setActiveCamera(camera);
		sceneManager->drawAll();
		guiEnv->drawAll();

		driver->setViewPort(rect<s32>(0, 380, 200, 600));
		driver->draw2DRectangle(SColor(100,0,0,190), mainCameraViewPortRect);
		skybox->setVisible(false);		
		sceneManager->setActiveCamera(topViewCamera);
		sceneManager->drawAll();
		
		driver->endScene();
	}
	device->drop();

	return EXIT_SUCCESS;
}