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 async function asyncTweenTo(node, duration, obj, ease = undefined) { return new Promise((resolve, reject) => { cc.tween(node) .to(duration, obj, ease) .call(() => { resolve(); }) .start(); }); } export async function asyncPlayDragonBoneAnimation(node, animationName, time = 1) { return new Promise((resolve, reject) => { node.getComponent(dragonBones.ArmatureDisplay) .once(dragonBones.EventObject.COMPLETE, () => { console.log('COMPLETE'); resolve(); }); node.getComponent(dragonBones.ArmatureDisplay) .playAnimation(animationName, time); }); } export async function asyncPlayEffectByUrl(url, loop = false) { return new Promise((resolve, reject) => { cc.assetManager.loadRemote(url, (err, clip) => { console.log(clip); cc.audioEngine.playEffect(clip, loop); }); }); }