BulletPhysics（ammo.js）-您将如何对物体施加力？ [英] BulletPhysics (ammo.js) - How would you go about applying force to an object?

问题描述

为了澄清- ammo.js 是使用mscripten的Bullet Physics的移植

To clarify - ammo.js is a port of Bullet Physics using mscripten

我有一个字符（本质上是一个块），需要用力推动。我已经尝试过（我认为）所有方法都可以使用力量，但是我仍然无法移动障碍物。

I have a character (essentially a block) that needs to be pushed with force. I have tried (I think) all of the methods for forces but I still cannot move the block.

setVelocity（1,0,0） 甚至不移动块-只是阻止重力作用在块上！
applyImpulse（[0,0,200000]，[0,0,0]）绝对没有任何作用。

applyForce（[0,0,200000]，[0,0,0]）绝对没有任何作用。

setVelocity(1,0,0) does not even move the block - it just stops gravity from acting on it! applyImpulse([0,0,200000],[0,0,0]) does absolutely nothing.
applyForce([0,0,200000],[0,0,0]) does absolutely nothing.

推荐答案

由于ammo.js是一个脚本端口，因此您必须使用其本机数据类型与之通信...

Due to the fact that ammo.js is an emscripten port, you have to use its native datatypes to talk to it...

设置您需要的速度body.setLinearVelocity（new Ammo.btVector3（1,0,0））;

So for setting velocity you'd need to body.setLinearVelocity(new Ammo.btVector3(1,0,0));

applyForce和applyImpulse都一样。

Same goes for applyForce and applyImpulse.

在我的代码中，我通常制作一组临时的btVector3s，并在整个文件中使用它们，以减少分配和垃圾回收的开销。.

In my code, I usually make a set of temporary btVector3s, and use them throughout the file, in order to reduce the overhead of allocation and garbage collection..

var tbv30 = new Ammo.btVector3();

function setBodyVelocity(body,x,y,z){
    tbv30.setValue(x,y,z);
    body.setLinearVelocity(tbv30);
}

祝你好运：D

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