cc.Class({
extends: cc.Component,
properties: {
// 主角跳跃高度
jumpHeight: 0,
// 主角跳跃持续时间
jumpDuration: 0,
// 最大移动速度
maxMoveSpeed: 0,
// 加速度
accel: 0,
// 跳跃音效资源
jumpAudio: {
default: null,
type: cc.AudioClip
},
},
setJumpAction: function () {
// 跳跃上升
var jumpUp = cc.moveBy(this.jumpDuration, cc.v2(0, this.jumpHeight)).easing(cc.easeCubicActionOut());
// 下落
var jumpDown = cc.moveBy(this.jumpDuration, cc.v2(0, -this.jumpHeight)).easing(cc.easeCubicActionIn());
// 添加一个回调函数，用于在动作结束时调用我们定义的其他方法
var callback = cc.callFunc(this.playJumpSound, this);
// 不断重复，而且每次完成落地动作后调用回调来播放声音
return cc.repeatForever(cc.sequence(jumpUp, jumpDown, callback));
},
playJumpSound: function () {
// 调用声音引擎播放声音
cc.audioEngine.playEffect(this.jumpAudio, false);
},
onKeyDown (event) {
// set a flag when key pressed
switch(event.keyCode) {
case cc.macro.KEY.a:
this.accLeft = true;
break;
case cc.macro.KEY.d:
this.accRight = true;
break;
}
},
onKeyUp (event) {
// unset a flag when key released
switch(event.keyCode) {
case cc.macro.KEY.a:
this.accLeft = false;
break;
case cc.macro.KEY.d:
this.accRight = false;
break;
}
},
onLoad: function() {
// 初始化跳跃动作
this.jumpAction = this.setJumpAction();
this.node.runAction(this.jumpAction);
// 加速度方向开关
this.accLeft = false;
this.accRight = false;
// 主角当前水平方向速度
this.xSpeed = 0;
// 初始化键盘输入监听
cc.systemEvent.on(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);
cc.systemEvent.on(cc.SystemEvent.EventType.KEY_UP, this.onKeyUp, this);
},
onDestroy () {
// 取消键盘输入监听
cc.systemEvent.off(cc.SystemEvent.EventType.KEY_DOWN, this.onKeyDown, this);
cc.systemEvent.off(cc.SystemEvent.EventType.KEY_UP, this.onKeyUp, this);
},
update: function (dt) {
// 根据当前加速度方向每帧更新速度
if (this.accLeft) {
this.xSpeed -= this.accel * dt;
} else if (this.accRight) {
this.xSpeed += this.accel * dt;
}
// 限制主角的速度不能超过最大值
if ( Math.abs(this.xSpeed) > this.maxMoveSpeed ) {
// if speed reach limit, use max speed with current direction
this.xSpeed = this.maxMoveSpeed * this.xSpeed / Math.abs(this.xSpeed);
}
// 根据当前速度更新主角的位置 this.node.x += this.xSpeed * dt;},12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182838485868788899091929394});---------------------