নীচের কোডটিতে আমি কিছু করতে চাই তার উদাহরণ রেখেছি। আমার কাছে ক্যামেরা রয়েছে এবং আমি চাইব যে এটি যখনই কোনও একটি বাক্সকে আঘাত করে তখন এটি চলন্ত বন্ধ হয়ে যায়, আমি এটি কীভাবে করব?
public class Main extends ApplicationAdapter {
private final ModelBuilder builder = new ModelBuilder();
private final Environment environment = new Environment();
private ModelBatch modelBatch;
private PerspectiveCamera camera;
private Model model;
private ArrayList<ModelInstance> instance = new ArrayList<ModelInstance>();
private FirstPersonCameraController controller;
private BoundingBox[] boxBounds = new BoundingBox[1000];
private BoundingBox cameraBox = new BoundingBox();
private Vector3 cameraSpeed = new Vector3();
private Vector3 oldCameraPos = new Vector3();
private Vector3 newCameraPos = new Vector3();
@Override
public void create() {
modelBatch = new ModelBatch();
//build the camera
camera = new PerspectiveCamera(67, graphics.getWidth(), graphics.getHeight());
camera.position.set(0f, 10f, 0f);
camera.lookAt(0, 10, 0);
camera.near = 1f;
camera.far = 1000f;
camera.update();
//build all the boxes
for (int i = 0; i < 1000; i++) {
model = builder.createBox(
(float) Math.random() * 50,
(float) Math.random() * 50,
(float) Math.random() * 50,
new Material(ColorAttribute.createDiffuse(
(float) random(),
(float) random(),
(float) random(), 1)
), Position | Normal);
instance.add(new ModelInstance(model));
instance.get(i).transform.setToTranslation(
(float) random() * 1000 - 500,
(float) random() * 1000,
(float) random() * 1000 - 500);
boxBounds[i] = new BoundingBox();
boxBounds[i] = model.calculateBoundingBox(boxBounds[i]);
}
//build the ground
model = builder.createBox(700f, 1f, 700f, new Material(ColorAttribute.createDiffuse(Color.GREEN)), Position | Normal);
ModelInstance ground = new ModelInstance(model);
instance.add(ground);
//build the center
model = builder.createBox(5f, 5f, 5f, new Material(ColorAttribute.createDiffuse(Color.RED)), Position | Normal);
ModelInstance center = new ModelInstance(model);
instance.add(center);
//code the lights here
DirectionalLight light = new DirectionalLight().set(255, 255, 255,
(float) random(),
(float) random(),
(float) random());
//set up the enviroment
environment.set(new ColorAttribute(AmbientLight, 255f, 255f, 255f, 1f));
environment.add(light);
//set up the camera controller
controller = new FirstPersonCameraController(camera);
controller.setDegreesPerPixel(0.25f);
controller.setVelocity(20);
input.setInputProcessor(controller);
}
@Override
public void render() {
//set up OpenGL
gl.glViewport(0, 0, graphics.getWidth(), graphics.getHeight());
gl.glEnable(GL_BLEND);
gl.glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
gl.glClearColor(0, 0, 0, 0);
//render the modelInstances
modelBatch.begin(camera);
modelBatch.render(instance, environment);
modelBatch.end();
controller.update();
if (input.isKeyPressed(Input.Keys.R)) {
camera.lookAt(0, 0, 0);
}
cameraSpeed = newCameraPos.sub(oldCameraPos);
cameraBox = new BoundingBox(new Vector3(camera.position.x,
camera.position.y,
camera.position.z),
new Vector3(camera.position.x + 10,
camera.position.y + 10,
camera.position.z + 10));
for (int i = 0; i < 1000; i++) {
if (cameraBox.contains(boxBounds[i])) {
camera.position.x = camera.position.x - cameraSpeed.x;
camera.position.y = camera.position.y - cameraSpeed.y;
camera.position.z = camera.position.z - cameraSpeed.z;
}
}
System.out.println(cameraSpeed.x + " " + cameraSpeed.y + " " + cameraSpeed.z);
}
@Override
public void dispose() {
modelBatch.dispose();
model.dispose();
}
}ফলাফল:
তিনি কোনও বাক্সে রয়েছেন কিনা তা সনাক্ত করতে পারেন (যদি তার y <box.y && y> box.y + box.height এবং x এবং z এর জন্য একই কাজ করতে চান, তবে তার গতিবেগের সাথে তার ওয়াই আপকে পরিবর্তন করুন)
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