在我的第一年学习中，我有一个Three.js项目。我必须创建一个小fps。我已经按照教程，一切都很好，除了子弹碰撞检测。我尝试了一些我在互联网上找到的东西，按照一些教程试图尽可能多地理解，因为我不想复制和粘贴东西。
但我必须承认我有点失落。这是我开发的代码。我想要做的是检测子弹何时触碰另一个物体。例如，当子弹碰到它时，make就会消失。
子弹的定义如下：
var bullet = new THREE.Mesh(
new THREE.SphereGeometry(0.05,8,8),
new THREE.MeshBasicMaterial({color:0xffffff})
这也是我的代码
var scene, camera, renderer, mesh, clock;
var meshFloor, ambientLight, light;
var crate, crateTexture, crateNormalMap, crateBumpMap;
var keyboard = {};
var player = { height:1.8, speed:0.2, turnSpeed:Math.PI*0.02, canShoot:0 };
var USE_WIREFRAME = false;
var loadingScreen = {
scene: new THREE.Scene(),
camera: new THREE.PerspectiveCamera(90, 1280/720, 0.1, 100),
box: new THREE.Mesh(
new THREE.BoxGeometry(0.5,0.5,0.5),
new THREE.MeshBasicMaterial({ color:0x4444ff })
)
};
var loadingManager = null;
var RESOURCES_LOADED = false;
// Models index
var models = {
tent: {
obj:"models/Tent_Poles_01.obj",
mtl:"models/Tent_Poles_01.mtl",
mesh: null
},
campfire: {
obj:"models/Campfire_01.obj",
mtl:"models/Campfire_01.mtl",
mesh: null
},
pirateship: {
obj:"models/Pirateship.obj",
mtl:"models/Pirateship.mtl",
mesh: null
},
uzi: {
obj:"models/uziGold.obj",
mtl:"models/uziGold.mtl",
mesh: null,
castShadow:false
}
};
// Meshes index
var meshes = {};
// Bullets array
var bullets = [];
function init(){
scene = new THREE.Scene();
camera = new THREE.PerspectiveCamera(90, 1280/720, 0.1, 1000);
clock = new THREE.Clock();
loadingScreen.box.position.set(0,0,5);
loadingScreen.camera.lookAt(loadingScreen.box.position);
loadingScreen.scene.add(loadingScreen.box);
loadingManager = new THREE.LoadingManager();
loadingManager.onProgress = function(item, loaded, total){
console.log(item, loaded, total);
};
loadingManager.onLoad = function(){
console.log("loaded all resources");
RESOURCES_LOADED = true;
onResourcesLoaded();
};
mesh = new THREE.Mesh(
new THREE.BoxGeometry(1,1,1),
new THREE.MeshPhongMaterial({color:0xff4444, wireframe:USE_WIREFRAME})
);
mesh.position.y += 1;
mesh.receiveShadow = true;
mesh.castShadow = true;
//scene.add(mesh);
meshFloor = new THREE.Mesh(
new THREE.PlaneGeometry(20,20, 10,10),
new THREE.MeshPhongMaterial({color:0xffffff, wireframe:USE_WIREFRAME})
);
meshFloor.rotation.x -= Math.PI / 2;
meshFloor.receiveShadow = true;
scene.add(meshFloor);
ambientLight = new THREE.AmbientLight(0xffffff, 0.2);
scene.add(ambientLight);
light = new THREE.PointLight(0xffffff, 0.8, 18);
light.position.set(-3,6,-3);
light.castShadow = true;
light.shadow.camera.near = 0.1;
light.shadow.camera.far = 25;
scene.add(light);
var textureLoader = new THREE.TextureLoader(loadingManager);
crateTexture = textureLoader.load("crate0/crate0_diffuse.jpg");
crateBumpMap = textureLoader.load("crate0/crate0_bump.jpg");
crateNormalMap = textureLoader.load("crate0/crate0_normal.jpg");
crate = new THREE.Mesh(
new THREE.BoxGeometry(3,3,3),
new THREE.MeshPhongMaterial({
color:0xffffff,
map:crateTexture,
bumpMap:crateBumpMap,
normalMap:crateNormalMap
})
);
crate.position.set(2.5, 3/2, 2.5);
crate.receiveShadow = true;
crate.castShadow = true;
// Load models
// REMEMBER: Loading in Javascript is asynchronous, so you need
// to wrap the code in a function and pass it the index. If you
// don't, then the index '_key' can change while the model is being
// downloaded, and so the wrong model will be matched with the wrong
// index key.
for( var _key in models ){
(function(key){
var mtlLoader = new THREE.MTLLoader(loadingManager);
mtlLoader.load(models[key].mtl, function(materials){
materials.preload();
var objLoader = new THREE.OBJLoader(loadingManager);
objLoader.setMaterials(materials);
objLoader.load(models[key].obj, function(mesh){
mesh.traverse(function(node){
if( node instanceof THREE.Mesh ){
if('castShadow' in models[key])
node.castShadow = models[key].castShadow;
else
node.castShadow = true;
if('receiveShadow' in models[key])
node.receiveShadow = models[key].receiveShadow;
else
node.receiveShadow = true;
}
});
models[key].mesh = mesh;
});
});
})(_key);
}
camera.position.set(0, player.height, -5);
camera.lookAt(new THREE.Vector3(0,player.height,0));
renderer = new THREE.WebGLRenderer();
renderer.setSize(1280, 720);
renderer.shadowMap.enabled = true;
renderer.shadowMap.type = THREE.BasicShadowMap;
document.body.appendChild(renderer.domElement);
animate();
}
// Runs when all resources are loaded
function onResourcesLoaded(){
// Clone models into meshes.
meshes["tent1"] = models.tent.mesh.clone();
meshes["tent2"] = models.tent.mesh.clone();
meshes["campfire1"] = models.campfire.mesh.clone();
meshes["campfire2"] = models.campfire.mesh.clone();
// Reposition individual meshes, then add meshes to scene
meshes["tent1"].position.set(-5, 0, 4);
scene.add(meshes["tent1"]);
meshes["tent2"].position.set(-8, 0, 4);
scene.add(meshes["tent2"]);
meshes["campfire1"].position.set(-5, 0, 1);
meshes["campfire2"].position.set(-8, 0, 1);
scene.add(meshes["campfire1"]);
scene.add(meshes["campfire2"]);
// player weapon
meshes["playerweapon"] = models.uzi.mesh.clone();
meshes["playerweapon"].position.set(0,2,0);
meshes["playerweapon"].scale.set(10,10,10);
scene.add(meshes["playerweapon"]);
}
function animate(){
// Play the loading screen until resources are loaded.
if( RESOURCES_LOADED == false ){
requestAnimationFrame(animate);
loadingScreen.box.position.x -= 0.05;
if( loadingScreen.box.position.x < -10 ) loadingScreen.box.position.x = 10;
loadingScreen.box.position.y = Math.sin(loadingScreen.box.position.x);
renderer.render(loadingScreen.scene, loadingScreen.camera);
return;
}
requestAnimationFrame(animate);
var time = Date.now() * 0.0005;
var delta = clock.getDelta();
mesh.rotation.x += 0.01;
mesh.rotation.y += 0.02;
crate.rotation.y += 0.01;
// Uncomment for absurdity!
// meshes["pirateship"].rotation.z += 0.01;
// go through bullets array and update position
// remove bullets when appropriate
for(var index=0; index<bullets.length; index+=1){
if( bullets[index] === undefined ) continue;
if( bullets[index].alive == false ){
bullets.splice(index,1);
continue;
}
bullets[index].position.add(bullets[index].velocity);
}
if(keyboard[38]){ // UP button
camera.position.x -= Math.sin(camera.rotation.y) * player.speed;
camera.position.z -= -Math.cos(camera.rotation.y) * player.speed;
}
if(keyboard[40]){ // DOWN button
camera.position.x += Math.sin(camera.rotation.y) * player.speed;
camera.position.z += -Math.cos(camera.rotation.y) * player.speed;
}
if(keyboard[65]){ // A key
camera.position.x += Math.sin(camera.rotation.y + Math.PI/2) * player.speed;
camera.position.z += -Math.cos(camera.rotation.y + Math.PI/2) * player.speed;
}
if(keyboard[68]){ // D key
camera.position.x += Math.sin(camera.rotation.y - Math.PI/2) * player.speed;
camera.position.z += -Math.cos(camera.rotation.y - Math.PI/2) * player.speed;
}
if(keyboard[37]){ // left arrow key
camera.rotation.y -= player.turnSpeed;
}
if(keyboard[39]){ // right arrow key
camera.rotation.y += player.turnSpeed;
}
// shoot a bullet
if(keyboard[32] && player.canShoot <= 0){ // spacebar key
// creates a bullet as a Mesh object
var bullet = new THREE.Mesh(
new THREE.SphereGeometry(0.05,8,8),
new THREE.MeshBasicMaterial({color:0xffffff})
);
// this is silly.
// var bullet = models.pirateship.mesh.clone();
// position the bullet to come from the player's weapon
bullet.position.set(
meshes["playerweapon"].position.x + 0.0 ,
meshes["playerweapon"].position.y + 0.10,
meshes["playerweapon"].position.z + 0.1
);
// set the velocity of the bullet
bullet.velocity = new THREE.Vector3(
-Math.sin(camera.rotation.y),
0,
Math.cos(camera.rotation.y)
);
// after 1000ms, set alive to false and remove from scene
// setting alive to false flags our update code to remove
// the bullet from the bullets array
bullet.alive = true;
setTimeout(function(){
bullet.alive = false;
scene.remove(bullet);
}, 1000);
// add to scene, array, and set the delay to 10 frames
bullets.push(bullet);
scene.add(bullet);
player.canShoot = 10;
}
if(player.canShoot > 0) player.canShoot -= 1;
// position the gun in front of the camera
meshes["playerweapon"].position.set(
camera.position.x - Math.sin(camera.rotation.y + Math.PI/6) * 0.75,
camera.position.y - 0.5 + Math.sin(time*4 + camera.position.x + camera.position.z)*0.01,
camera.position.z + Math.cos(camera.rotation.y + Math.PI/6) * 0.75
);
meshes["playerweapon"].rotation.set(
camera.rotation.x,
camera.rotation.y - Math.PI,
camera.rotation.z
);
renderer.render(scene, camera);
}
function keyDown(event){
keyboard[event.keyCode] = true;
}
function keyUp(event){
keyboard[event.keyCode] = false;
}
window.addEventListener('keydown', keyDown);
window.addEventListener('keyup', keyUp);
window.onload = init;
这是我已经开发的代码的小提琴：
https://jsfiddle.net/Mxfrd/bany0afg/
如果有人知道我该怎么做，那就超级棒了！我在这一点上很失落。
谢谢