// Learn TypeScript:
// - [Chinese] http://www.cocos.com/docs/creator/scripting/typescript.html
// - [English] http://www.cocos2d-x.org/docs/editors_and_tools/creator-chapters/scripting/typescript/index.html
// Learn Attribute:
// - [Chinese] http://www.cocos.com/docs/creator/scripting/reference/attributes.html
// - [English] http://www.cocos2d-x.org/docs/editors_and_tools/creator-chapters/scripting/reference/attributes/index.html
// Learn life-cycle callbacks:
// - [Chinese] http://www.cocos.com/docs/creator/scripting/life-cycle-callbacks.html
// - [English] http://www.cocos2d-x.org/docs/editors_and_tools/creator-chapters/scripting/life-cycle-callbacks/index.html
const {ccclass, property} = cc._decorator;
@ccclass
export default class NewClass extends cc.Component {
// @property(cc.Label)
// label: cc.Label = null;
// 主角跳跃高度
@property
jumpHeight:number = 0;
// 主角跳跃持续时间
@property
jumpDuration:number = 0;
// 最大移动速度
@property
maxMoveSpeed:number = 0;
// 加速度
@property
accel:number = 0;
accLeft:boolean = false;
accRight:boolean = false;
xSpeed:number = 0;
// LIFE-CYCLE CALLBACKS:
onLoad () {
// 初始化跳跃动作
let jumpAction = this.setJumpAction();
this.node.runAction(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
this.setInputControl();
}
start () {
}
setJumpAction() {
// 跳跃上升
let jumpUp = cc.moveBy(this.jumpDuration, cc.p(0, this.jumpHeight)).easing(cc.easeCubicActionOut());
// 下落
let jumpDown = cc.moveBy(this.jumpDuration, cc.p(0, -this.jumpHeight)).easing(cc.easeCubicActionIn());
// 不断重复
return cc.repeatForever(cc.sequence(jumpUp, jumpDown));
}
setInputControl () {
console.log("setInputControl");
// 添加键盘事件监听
cc.eventManager.addListener({
event: cc.EventListener.KEYBOARD,
// 有按键按下时，判断是否是我们指定的方向控制键，并设置向对应方向加速
onKeyPressed(keyCode, event) {
switch(keyCode) {
case cc.KEY.a:
this.accLeft = true;
this.accRight = false;
console.log("cc.KEY.a", this.accLeft, this.accRight);
break;
case cc.KEY.d:
this.accLeft = false;
this.accRight = true;
console.log("cc.KEY.d", this.accLeft, this.accRight);
break;
}
console.log("onKeyPressed", this.accLeft, this.accRight);
},
// 松开按键时，停止向该方向的加速
onKeyReleased(keyCode, event) {
switch(keyCode) {
case cc.KEY.a:
this.accLeft = false;
console.log("cc.KEY.a", this.accLeft, this.accRight);
break;
case cc.KEY.d:
this.accRight = false;
console.log("cc.KEY.d", this.accLeft, this.accRight);
break;
}
}
}, this.node);
}
update (dt) {
// 根据当前加速度方向每帧更新速度
console.log(this.accel, this.accLeft, this.accRight);
if (this.accLeft) {
this.xSpeed -= this.accel * dt;
console.log(this.xSpeed, "this.accLeft");
} else if (this.accRight) {
this.xSpeed += this.accel * dt;
console.log(this.xSpeed, "this.accRight");
}
// 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;
}
}
按下a或d后，this.accLeft, this.accRight改变了，但是update里的值并没有改变，求指教
