three实现第一人称射击游戏效果-html代码-BFW代码库

代码语言：html
所属分类：游戏
代码描述：three实现第一人称射击游戏效果
下面为部分代码预览，完整代码请点击下载或在bfwstudio webide中打开

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">

<style>
#instructions {
				width: 100%;
				height: 100%;
				
				user-select: none;
				text-shadow: 1px 1px 1px #9E9E9E;
				
				position: absolute;
				width: 100%;
				height: 100%;
				background-color: rgba(0,0,0,0.5);

				display: -webkit-box;
				display: -moz-box;
				display: box;

				-webkit-box-orient: horizontal;
				-moz-box-orient: horizontal;
				box-orient: horizontal;

				-webkit-box-pack: center;
				-moz-box-pack: center;
				box-pack: center;

				-webkit-box-align: center;
				-moz-box-align: center;
				box-align: center;

				color: #ffffff;
				text-align: center;
				font-family: Arial;
				font-size: 14px;
				line-height: 24px;

				cursor: pointer;
}
</style>

</head>
<body translate="no">
<body style="margin: 0;">
<div id="instructions">
<div>
<h1>点击开始</h1>
射击:单击鼠标左键<br />
移动: 键盘W-A-S-D 或者 箭头<br />
跑: SHIFT键<br />
跳跃: 空格键<br />
看: 移动鼠标
退出：esc键
</div>
</div>

<script type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/three.r118.js"></script>
<script type="text/javascript" src="http://repo.bfw.wiki/bfwrepo/js/dat.gui-min.js"></script>
<script>
THREE.FirstPersonControls = function ( camera, MouseMoveSensitivity = 0.002, speed = 800.0, jumpHeight = 350.0, height = 30.0) {
  var scope = this;
  
  scope.MouseMoveSensitivity = MouseMoveSensitivity;
  scope.speed = speed;
  scope.height = height;
  scope.jumpHeight = scope.height + jumpHeight;
  
  var moveForward = false;
  var moveBackward = false;
  var moveLeft = false;
  var moveRight = false;
  var canJump = false;
  var run = false;
  
  var velocity = new THREE.Vector3();
  var direction = new THREE.Vector3();

  var prevTime = performance.now();

  camera.rotation.set( 0, 0, 0 );

  var pitchObject = new THREE.Object3D();
  pitchObject.add( camera );

  var yawObject = new THREE.Object3D();
  yawObject.position.y = 10;
  yawObject.add( pitchObject );

  var PI_2 = Math.PI / 2;

  var onMouseMove = function ( event ) {

    if ( scope.enabled === false ) return;

    var movementX = event.movementX || event.mozMovementX || event.webkitMovementX || 0;
    var movementY = event.movementY || event.mozMovementY || event.webkitMovementY || 0;

    yawObject.rotation.y -= movementX * MouseMoveSensitivity;
    pitchObject.rotation.x -= movementY * MouseMoveSensitivity;

    pitchObject.rotation.x = Math.max( - PI_2, Math.min( PI_2, pitchObject.rotation.x ) );

  };

  var onKeyDown = (function ( event ) {
    
    if ( scope.enabled === false ) return;
    
    switch ( event.keyCode ) {
      case 38: // up
      case 87: // w
        moveForward = true;
        break;

      case 37: // left
      case 65: // a
        moveLeft = true;
        break;

      case 40: // down
      case 83: // s
        moveBackward = true;
        break;

      case 39: // right
      case 68: // d
        moveRight = true;
        break;

      case 32: // space
        if ( canJump === true ) velocity.y += run === false ? jumpHeight : jumpHeight + 50;
        canJump = false;
        break;

      case 16: // shift
        run = true;
        break;

    }

  }).bind(this);

  var onKeyUp = (function ( event ) {
    
    if ( scope.enabled === false ) return;
    
    switch ( event.keyCode ) {

      case 38: // up
      case 87: // w
        moveForward = false;
        break;

      case 37: // left
      case 65: // a
        moveLeft = false;
        break;

      case 40: // down
      case 83: // s
        moveBackward = false;
        break;

      case 39: // right
      case 68: // d
        moveRight = false;
        break;

      case 16: // shift
        run = false;
        break;

    }

  }).bind(this);

  scope.dispose = function() {

    document.removeEventListener( 'mousemove', onMouseMove, false );
    document.removeEventListener( 'keydown', onKeyDown, false );
    document.removeEventListener( 'keyup', onKeyUp, false );

  };

  document.addEventListener( 'mousemove', onMouseMove, false );
  document.addEventListener( 'keydown', onKeyDown, false );
  document.addEventListener( 'keyup', onKeyUp, false );

  scope.enabled = false;

  scope.getObject = function () {

    return yawObject;

  };

  scope.update = function () {

    var time = performance.now();
    var delta = ( time - prevTime ) / 1000;

    velocity.y -= 9.8 * 100.0 * delta;
    velocity.x -= velocity.x * 10.0 * delta;
    velocity.z -= velocity.z * 10.0 * delta;

    direction.z = Number( moveForward ) - Number( moveBackward );
    direction.x = Number( moveRight ) - Number( moveLeft );
    direction.normalize();

    var currentSpeed = speed;
    if (run && (moveForward || moveBackward || moveLeft || moveRight)) currentSpeed = currentSpeed + (currentSpeed * 1.1);

    if ( moveForward || moveBackward ) velocity.z -= direction.z * currentSpeed * delta;
    if ( moveLeft || moveRight ) velocity.x -= direction.x * currentSpeed * delta;

    scope.getObject().translateX( -velocity.x * delta );
    scope.getObject().translateZ( velocity.z * delta );
    
    scope.getObject().position.y += ( velocity.y * delta );

    if ( scope.getObject().position.y < scope.height ) {

      velocity.y = 0;
      scope.getObject().position.y = scope.height;

      canJump = true;
    }
    prevTime = time;
  };
};

var camera, scene, renderer, controls;

var vertex = new THREE.Vector3();
var color = new THREE.Color();
var particles = new Array();
var world = new THREE.Group();

var circle_sprite = new THREE.TextureLoader().load("http://repo.bfw.wiki/bfwrepo/image/5dd653c337706.png");

function randomPosition(radius) {
  radius = radius * Math.random();
  var theta = Math.random() * 2.0*Math.PI;
  var phi = Math.random() * Math.PI;

  var sinTheta = Math.sin(theta); 
  var cosTheta = Math.cos(theta);
  var sinPhi = Math.sin(phi); 
  var cosPhi = Math.cos(phi);
  var x = radius * sinPhi * cosTheta;
  var y = radius * sinPhi * sinTheta;
  var z = radius * cosPhi;

  return [x, y, z];
}

function getRandomInt(min, max) {
  min = Math.ceil(min);
  max = Math.floor(max);
  return Math.floor(Math.random() * (max - min)) + min;
};

var instructions = document.querySelector("#instructions");
var havePointerLock = 'pointerLockElement' in document || 'mozPointerLockElement' in document || 'webkitPointerLockElement' in document;
if ( havePointerLock ) {
  var element = document.body;
  var pointerlockchange = function ( event ) {
    if ( document.pointerLockElement === element || document.mozPointerLockElement === element || document.webkitPointerLockElement === element ) {
      controls.enabled = true;
      instructions.style.display = 'none';
    } else {
      controls.enabled = false;
      instructions.style.display = '-webkit-box';
    }
  };
  var pointerlockerror = function ( event ) {
    instructions.style.display = '';
  };

  document.addEventListener( 'pointerlockchange', pointerlockchange, false );
  document.addEventListener( 'mozpointerlockchange', pointerlockchange, false );
  document.addEventListener( 'webkitpointerlockchange', pointerlockchange, false );
  document.addEventListener( 'pointerlockerror', pointerlockerror, false );
  document.addEventListener( 'mozpointerlockerror', pointerlockerror, false );
  document.addEventListener( 'webkitpointerlockerror', pointerlockerror, false );

  instructions.addEventListener( 'click', function ( event ) {
    element.requestPointerLock = element.requestPointerLock || element.mozRequestPointerLock || element.webkitRequestPointerLock;
    if ( /Firefox/i.test( navigator.userAgent ) ) {
      var fullscreenchange = function ( event ) {
        if ( document.fullscreenElement === element || document.mozFullscreenElement === element || document.mozFullScreenElement === element ) {
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