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export function getPosByAngle(angle, len) {
const radian = angle * Math.PI / 180;
const x = Math.sin(radian) * len;
const y = Math.cos(radian) * len;
return { x, y };
}
export function getAngleByPos(px, py, mx, my) {
const x = Math.abs(px - mx);
const y = Math.abs(py - my);
const z = Math.sqrt(Math.pow(x, 2) + Math.pow(y, 2));
const cos = y / z;
const radina = Math.acos(cos); // 用反三角函数求弧度
let angle = Math.floor(180 / (Math.PI / radina) * 100) / 100; // 将弧度转换成角度
if (mx > px && my > py) {// 鼠标在第四象限
angle = 180 - angle;
}
if (mx === px && my > py) {// 鼠标在y轴负方向上
angle = 180;
}
if (mx > px && my === py) {// 鼠标在x轴正方向上
angle = 90;
}
if (mx < px && my > py) {// 鼠标在第三象限
angle = 180 + angle;
}
if (mx < px && my === py) {// 鼠标在x轴负方向
angle = 270;
}
if (mx < px && my < py) {// 鼠标在第二象限
angle = 360 - angle;
}
// console.log('angle: ', angle);
return angle;
}
export function exchangeNodePos(baseNode, targetNode) {
return baseNode.convertToNodeSpaceAR(targetNode._parent.convertToWorldSpaceAR(cc.v2(targetNode.x, targetNode.y)));
}
export function RandomInt(a, b = 0) {
let max = Math.max(a, b);
let min = Math.min(a, b);
return Math.floor(Math.random() * (max - min) + min);
}
export function randomSortByArr(arr) {
const newArr = [];
const tmpArr = arr.concat();
while (tmpArr.length > 0) {
const randomIndex = Math.floor(tmpArr.length * Math.random());
newArr.push(tmpArr[randomIndex]);
tmpArr.splice(randomIndex, 1);
}
return newArr;
}
export function setSprNodeMaxLen(sprNode, maxW, maxH) {
const sx = maxW / sprNode.width;
const sy = maxH / sprNode.height;
const s = Math.min(sx, sy);
sprNode.scale = Math.round(s * 1000) / 1000;
}
export function localPosTolocalPos(baseNode, targetNode) {
const worldPos = targetNode.parent.convertToWorldSpaceAR(cc.v2(targetNode.x, targetNode.y));
const localPos = baseNode.parent.convertToNodeSpaceAR(cc.v2(worldPos.x, worldPos.y));
return localPos;
}
export function worldPosToLocalPos(worldPos, baseNode) {
const localPos = baseNode.parent.convertToNodeSpaceAR(cc.v2(worldPos.x, worldPos.y));
return localPos;
}
export function getScaleRateBy2Node(baseNode, targetNode, maxFlag = true) {
const worldRect1 = targetNode.getBoundingBoxToWorld();
const worldRect2 = baseNode.getBoundingBoxToWorld();
const sx = worldRect1.width / worldRect2.width;
const sy = worldRect1.height / worldRect2.height;
if (maxFlag) {
return Math.max(sx, sy);
} else {
return Math.min(sx, sy);
}
}
export function getDistance (start, end){
var pos = cc.v2(start.x - end.x, start.y - end.y);
var dis = Math.sqrt(pos.x*pos.x + pos.y*pos.y);
return dis;
}
export function playAudioByUrl(audio_url, cb=null) {
if (audio_url) {
cc.assetManager.loadRemote(audio_url, (err, audioClip) => {
const audioId = cc.audioEngine.play(audioClip, false, 0.8);
if (cb) {
cc.audioEngine.setFinishCallback(audioId, () => {
cb();
});
}
});
}
}
export function btnClickAnima(btn, time=0.15, rate=1.05) {
btn.tmpScale = btn.scale;
btn.on(cc.Node.EventType.TOUCH_START, () => {
cc.tween(btn)
.to(time / 2, {scale: btn.scale * rate})
.start()
})
btn.on(cc.Node.EventType.TOUCH_CANCEL, () => {
cc.tween(btn)
.to(time / 2, {scale: btn.tmpScale})
.start()
})
btn.on(cc.Node.EventType.TOUCH_END, () => {
cc.tween(btn)
.to(time / 2, {scale: btn.tmpScale})
.start()
})
}