javascript Three.js 第一人称控制

Three.js First Person Controls

提问by Chad

I'm playing around with Three.js and WebGL and can't quite get the controls the way I want. I chose to try to "roll my own" controls since Three.js's FirstPersonControls do not use pointer lock.

我在玩 Three.js 和 WebGL，但不能完全按照我想要的方式获得控件。我选择尝试“滚动我自己的”控件，因为 Three.js 的 FirstPersonControls 不使用指针锁定。

Anyway, I took most of my code from the built-in FirstPersonControls, converted it to use pointer lock (movementXinstead of pageX - offset), but I am having trouble smoothing the look motion.

无论如何，我从内置的 FirstPersonControls 中获取了大部分代码，将其转换为使用指针锁定（movementX而不是pageX - offset），但是我无法平滑外观运动。

Here is my onMouseMove(using originalEventsince it is a jquery event):

这是我的onMouseMove（使用，originalEvent因为它是一个 jquery 事件）：

onMouseMove: function(e) {
    if(!document.pointerLockElement) return;

    var moveX = e.originalEvent.movementX       ||
                    e.originalEvent.mozMovementX    ||
                    e.originalEvent.webkitMovementX ||
                    0,
        moveY = e.originalEvent.movementY       ||
                    e.originalEvent.mozMovementY    ||
                    e.originalEvent.webkitMovementY ||
                    0;

    //Update the mouse movement for coming frames
    this.mouseMovementX = moveX;
    this.mouseMovementY = moveY;
}

And my Controls.update()(called on each animation frame, with the THREE.Clockdelta):

而我的Controls.update()（在每个动画帧上调用，带有THREE.Clock增量）：

update: function(delta) {            
    if(this.freeze) {
        return;
    }

    //movement, works fine
    if(this.moveForward) this.camera.translateZ(-(actualMoveSpeed + this.autoSpeedFactor));
    if(this.moveBackward) this.camera.translateZ(actualMoveSpeed);

    if(this.moveLeft) this.camera.translateX(-actualMoveSpeed);
    if(this.moveRight) this.camera.translateX(actualMoveSpeed);

    /////////
    //ISSUES ARE WITH THIS CODE:
    /////////
    //look movement, really jumpy
    this.lon += this.mouseMovementX;
    this.lat -= this.mouseMovementY;

    this.lat = Math.max(-85, Math.min(85, this.lat));
    this.phi = (90 - this.lat) * Math.PI / 180;
    this.theta = this.lon * Math.PI / 180;

    this.target.x = this.camera.position.x + 100 * Math.sin(this.phi) * Math.cos(this.theta);
    this.target.y = this.camera.position.y + 100 * Math.cos(this.phi);
    this.target.z = this.camera.position.z + 100 * Math.sin(this.phi) * Math.sin(this.theta);

    this.camera.lookAt(this.target);
}

This code does work, but moving the camera is jumpy as the mouse moves around. I could really use some help figuring out how to smooth it.

这段代码确实有效，但是随着鼠标的移动，移动相机会很跳跃。我真的可以使用一些帮助来弄清楚如何平滑它。

You can see what I mean by "jumpy" here. I'm new to Three.js, WebGL, and just 3D in general so any help is appreciated.

你可以在这里看到我所说的“跳跃”是什么意思。我是 Three.js、WebGL 和一般 3D 的新手，因此感谢任何帮助。

Thanks,

谢谢，

-Chad

-乍得

---

---

EDITAfter working with @przemo_li, here is the working code he came up with:

编辑与@przemo_li 合作后，这是他想出的工作代码：

onMouseMove: function(e) {
    if(!document.pointerLockElement) return;

    var moveX = e.originalEvent.movementX       ||
                    e.originalEvent.mozMovementX    ||
                    e.originalEvent.webkitMovementX ||
                    0,
        moveY = e.originalEvent.movementY       ||
                    e.originalEvent.mozMovementY    ||
                    e.originalEvent.webkitMovementY ||
                    0;

    //Update the initial coords on mouse move
    this.mouseMovementX += moveX; //aggregate mouse movements as a total delta delta
    this.mouseMovementY += moveY;
},
update: function(delta) {            
    if(this.freeze) {
        return;
    }

    //movement
    if(this.moveForward) this.camera.translateZ(-(actualMoveSpeed + this.autoSpeedFactor));
    if(this.moveBackward) this.camera.translateZ(actualMoveSpeed);

    if(this.moveLeft) this.camera.translateX(-actualMoveSpeed);
    if(this.moveRight) this.camera.translateX(actualMoveSpeed);

    //look movement
    this.lon += this.mouseMovementX;
    this.lat -= this.mouseMovementY;

    this.mouseMovementX = 0; //reset mouse deltas to 0 each rendered frame
    this.mouseMovementY = 0;

    this.phi = (90 - this.lat) * Math.PI / 180;
    this.theta = this.lon * Math.PI / 180;

    if(this.constrainVertical) {
        this.phi = THREE.Math.mapLinear(this.phi, 0, Math.PI, this.verticalMin, this.verticalMax);
    }

    this.target.x = this.camera.position.x + 100 * Math.sin(this.phi) * Math.cos(this.theta);
    this.target.y = this.camera.position.y + 100 * Math.cos(this.phi);
    this.target.z = this.camera.position.z + 100 * Math.sin(this.phi) * Math.sin(this.theta);

    this.camera.lookAt(this.target);
}

回答by Air

'Official' version just added: https://github.com/mrdoob/three.js/blob/master/examples/js/controls/PointerLockControls.js

刚刚添加的“官方”版本：https: //github.com/mrdoob/three.js/blob/master/examples/js/controls/PointerLockControls.js

回答by przemo_li

1)Constraints? In your code you limit mouse X movement to -|+ 85 Its unlikely that such constraint is needed.

1）约束？在您的代码中，您将鼠标 X 移动限制为 -|+ 85 不太可能需要这种约束。

2)Aggregate all events that happen during frame In your code you override mouse movement with each new event. So if you get 3 events during frame only most recent will be stored.

2）聚合在帧期间发生的所有事件在您的代码中，您用每个新事件覆盖鼠标移动。因此，如果您在帧期间获得 3 个事件，则只会存储最近的事件。

Add those movements. Than after rendering frame you can clear count. And start gathering events again.

添加这些动作。比渲染帧后你可以清除计数。并再次开始收集事件。