如何使用键盘输入移动三个JS立方体？

Question

如何使用键盘输入移动三个JS立方体？

Tee*_*eej 8 javascript event-handling keyboard-events dom-events three.js

以下代码是我到目前为止使用三个js尝试使用WASD键向上,向下,向左和向右移动或平移旋转立方体对象,然后重置为原始位置(屏幕中间)的代码空格键.我是三个j的新手,我无法弄清楚如何使机芯运转.任何帮助将不胜感激.这是我到目前为止:

// first 5 lines are a template and should be pretty much the same always
var scene = new THREE.Scene();
var camera = new THREE.PerspectiveCamera(75, window.innerWidth/window.innerHeight, 0.1, 1000);
var renderer = new THREE.WebGLRenderer();
renderer.setSize(window.innerWidth, window.innerHeight);
document.body.appendChild(renderer.domElement);
// end template here

var geom = new THREE.BoxGeometry(10, 10, 10);
var mat = new THREE.MeshBasicMaterial({color: "red"});
var cube = new THREE.Mesh(geom, mat);

scene.add(cube);
camera.position.x = 2;
camera.position.y = 1;
camera.position.z = 20;

var light = new THREE.AmbientLight( 0x404040 ); // soft white light
scene.add( light );

// White directional light at 70% intensity shining from the top.
var directionalLight = new THREE.DirectionalLight( 0xffffff, 0.7 );
scene.add( directionalLight );

// movement
document.addEventListener("keydown", onDocumentKeyDown, false);
function onDocumentKeyDown(event) {
    var keyCode = event.which;
    // up
    if (keyCode == 87) {
        cube.position.y += 1;
        // down
    } else if (keyCode == 83) {
        cube.position.y -= 1;
        // left
    } else if (keyCode == 65) {
        cube.position.x -= 1;
        // right
    } else if (keyCode == 68) {
        cube.position.x += 1;
        // space
    } else if (keyCode == 32) {
        cube.position.x = 0.0;
        cube.position.y = 0.0;
    }
    render();
};

var render = function() {
  requestAnimationFrame(render);
  cube.rotation.x += 0.03;
  cube.rotation.y += 0.02;
  cube.rotation.z += 0.01;
  renderer.render(scene, camera);
};

render();

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这只是javascript文件.我还有一个单独的HTML文件来启动.这是HTML:

<html><head><title>WebGL with three.js</title>
<style>
  body { margin: 0; }
  canvas { width: 100%; height: 100% }
</style>
</head><body>
<script src="three.js"></script>
<script src="Learn_Cube3.js"></script>
</body></html>

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Answer 1

Ras*_*rov 6

这个怎么样？ -

// movement - please calibrate these values
var xSpeed = 0.0001;
var ySpeed = 0.0001;

document.addEventListener("keydown", onDocumentKeyDown, false);
function onDocumentKeyDown(event) {
    var keyCode = event.which;
    if (keyCode == 87) {
        cube.position.y += ySpeed;
    } else if (keyCode == 83) {
        cube.position.y -= ySpeed;
    } else if (keyCode == 65) {
        cube.position.x -= xSpeed;
    } else if (keyCode == 68) {
        cube.position.x += xSpeed;
    } else if (keyCode == 32) {
        cube.position.set(0, 0, 0);
    }
};

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要移动对象,您必须更改对象的位置.另外,根据需要校准xSpeed和ySpeed.

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