在我的游戏中,我制作一个球体(使用a球体创建),一个动态物体,并与另一个动态物体(a-box)碰撞。
在碰撞时,球体会分成多个较小的球体。我需要停止这种瓦解
这是codepen-sphere breaks on collision with dynamic body
这是随附的代码-
HTML
<a-scene physics="debug: true; gravity: -5.0">
<a-entity camera="userHeight: 1.6"
look-controls
kinematic-body>
<a-entity cursor
position="0 0 -1"
geometry="primitive: circle; radius: 0.01; segments: 4;"
material="color: #FF4444; shader: flat"></a-entity>
<a-entity position="0 0 1" id="attachment"></a-entity>
</a-entity>
<a-entity geometry="primitive: box; height:2" material="color: black; shader: flat" position="0 2 -5" dynamic-body></a-entity>
<a-plane static-body color="#ccc" height="100" width="100" position="0 -0.1 0" rotation="-90 0 0"></a-plane>
</a-scene>
和JS
const scene = document.querySelector('a-scene');
const camera = document.querySelector('[camera]');
const attachment = document.querySelector('#attachment');
function spawnBullet() {
let entity = document.createElement('a-sphere');
let impulseAmount = 8;
entity.setAttribute('radius', 1);
// Set initial position of projectile to that of the camera.
entity.setAttribute('position', camera.getAttribute('position'));
entity.setAttribute('color', '#00FFCC');
entity.setAttribute('shader', 'flat');
entity.setAttribute('mass', 10);
// Append projectile to the scene, not to the camera, to
// avoid all sorts of complications. Most notably, CANNON.js
// has no scene graph or nesting.
scene.appendChild(entity);
entity.setAttribute('dynamic-body', true);
entity.addEventListener('body-loaded', function(){
// Can't apply forces during the same tick that attaches the body, because
// it hasn't been fully synced to the physics sim. (bug)
setTimeout(function () {
let pStart = new CANNON.Vec3();
// Use an origin point behind the head, not at the head, so
// there's a useful vector between the origin and the projectile.
pStart.copy(attachment.object3D.getWorldPosition());
let force = entity.body.position.vsub(pStart);
force.normalize();
force.scale(impulseAmount, force);
entity.body.applyImpulse(force, entity.body.position);
}, 0);
entity.addEventListener('collide', function(e){
console.log("hit");
})
});
}
if (scene.hasLoaded) init(); // change 2
else scene.addEventListener('loaded', init);
function init () {
// any code that appends things to the scene
scene.addEventListener('click', spawnBullet);
}
有没有一种方法可以停止碰撞并且球体在碰撞后保持完好无损?
答案 0 :(得分:2)
范围没有破裂,正在发生的是,您的click
事件处理程序每次单击都被调用多次,并一次创建多个范围。我不确定为什么会这样。解决此问题的一种方法,使用AFRAME.utils.throttle
来防止太快地创建球体:
spawnBullet = AFRAME.utils.throttle(spawnBullet, 100);
scene.addEventListener('click', spawnBullet);
更新到新版本的A-Frame也可以解决此问题。
答案 1 :(得分:2)