You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
110 lines
3.8 KiB
110 lines
3.8 KiB
import Common5 from "../../Platform/th/Common5";
|
|
|
|
const { ccclass, property } = cc._decorator;
|
|
export enum Axis {
|
|
PositiveX, // 正 X 轴
|
|
PositiveY, // 正 Y 轴
|
|
NegativeX, // 负 X 轴
|
|
NegativeY, // 负 Y 轴
|
|
}
|
|
@ccclass
|
|
export default class FMRunCircle extends cc.Component {
|
|
@property({ type: cc.Node, tooltip: '围绕旋转的目标' })
|
|
public target: cc.Node = null;
|
|
|
|
@property({ tooltip: '顺时针旋转' })
|
|
public clockwise: boolean = true;
|
|
|
|
@property({ tooltip: '旋转一圈花费的时间' })
|
|
public timePerRound: number = 10;
|
|
|
|
@property({ tooltip: '是否始终面向目标节点' })
|
|
public faceToTarget: boolean = false;
|
|
|
|
@property({
|
|
type: cc.Enum(Axis),
|
|
tooltip: '面向目标节点的轴：\n- PositiveX：正 X 轴\n- PositiveY：正 Y 轴\n- NegativeX：负 X 轴\n- NegativeY：负 Y 轴',
|
|
visible() { return this.faceToTarget }
|
|
})
|
|
public faceAxis: Axis = Axis.NegativeY;
|
|
|
|
@property({ tooltip: '自动开始旋转' })
|
|
public autoStart: boolean = false;
|
|
|
|
public angle: number = 0; // 角度
|
|
|
|
public radius: number = 0; // 半径
|
|
|
|
private isRotating: boolean = false; // 标志位，是否正在旋转
|
|
start() {
|
|
if (this.autoStart) this.run();
|
|
}
|
|
/**
|
|
* 开始围绕目标节点旋转
|
|
* @param target 目标节点
|
|
* @param clockwise 是否顺时针旋转
|
|
* @param timePerRound 旋转一圈的时间
|
|
* @param faceToTarget 是否始终面向目标节点
|
|
* @param faceAxis 面向目标节点的轴
|
|
*/
|
|
public run(target?: cc.Node, clockwise?: boolean, timePerRound?: number, faceToTarget?: boolean, faceAxis?: Axis) {
|
|
if (target) this.target = target;
|
|
if (clockwise) this.clockwise = clockwise;
|
|
if (timePerRound) this.timePerRound = timePerRound;
|
|
if (faceToTarget) this.faceToTarget = faceToTarget;
|
|
if (faceAxis) this.faceAxis = faceAxis;
|
|
if (!this.target) {
|
|
cc.log('No target!');
|
|
return;
|
|
}
|
|
// 计算初始角度和半径
|
|
this.angle = this.getAngle(this.target.getPosition(), this.node.getPosition());
|
|
this.radius = Common5.makeDistance(this.target.getPosition(), this.node.getPosition());
|
|
// 开始
|
|
this.isRotating = true;
|
|
}
|
|
/**
|
|
* 获取两点间的角度
|
|
* @param p1 点1
|
|
* @param p2 点2
|
|
*/
|
|
private getAngle(p1: cc.Vec2, p2: cc.Vec2): number {
|
|
return Math.atan(p2.y - p1.y / p2.x - p1.x);
|
|
}
|
|
update(dt: number) {
|
|
if (!this.isRotating || !this.target) return;
|
|
// 将角度转换为弧度
|
|
let radian = Math.PI / 180 * this.angle;
|
|
// 更新节点的位置
|
|
this.node.x = this.target.x + this.radius * Math.cos(radian);
|
|
this.node.y = this.target.y + this.radius * Math.sin(radian);
|
|
// 更新节点的角度
|
|
if (this.faceToTarget) {
|
|
switch (this.faceAxis) {
|
|
case Axis.PositiveX:
|
|
this.node.angle = this.angle + 180;
|
|
break;
|
|
case Axis.PositiveY:
|
|
this.node.angle = this.angle + 90;
|
|
break;
|
|
case Axis.NegativeX:
|
|
this.node.angle = this.angle;
|
|
break;
|
|
case Axis.NegativeY:
|
|
this.node.angle = this.angle - 90;
|
|
break;
|
|
}
|
|
}
|
|
// 计算下一帧的角度
|
|
let anglePerFrame = dt * (360 / this.timePerRound);
|
|
if (this.clockwise) this.angle -= anglePerFrame;
|
|
else this.angle += anglePerFrame;
|
|
// 重置角度，避免数值过大
|
|
if (this.angle >= 360) this.angle %= 360;
|
|
else if (this.angle <= -360) this.angle %= -360;
|
|
}
|
|
public stop() {
|
|
this.isRotating = false;
|
|
}
|
|
|
|
}
|
|
|