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()
})
}
export function getSpriteFrimeByUrl(url, cb) {
cc.loader.load({ url }, (err, img) => {
const spriteFrame = new cc.SpriteFrame(img)
if (cb) {
cb(spriteFrame);
}
})
}
export function getSprNode(resName) {
const sf = cc.find('Canvas/res/img/' + resName).getComponent(cc.Sprite).spriteFrame;
const node = new cc.Node();
node.addComponent(cc.Sprite).spriteFrame = sf;
return node;
}
export function getSprNodeByUrl(url, cb) {
const node = new cc.Node();
const spr = node.addComponent(cc.Sprite);
getSpriteFrimeByUrl(url, (sf) => {
spr.spriteFrame = sf;
if (cb) {
cb(spr);
}
})
}
export function playAudio(audioClip, cb = null) {
if (audioClip) {
const audioId = cc.audioEngine.playEffect(audioClip, false);
if (cb) {
cc.audioEngine.setFinishCallback(audioId, () => {
cb();
});
}
}
}
export async function asyncDelay(time) {
return new Promise((resolve, reject) => {
try {
cc.tween(cc.find('Canvas'))
.delay(time)
.call(()=>{
resolve(null);
})
.start();
} catch (e) {
reject(e);
}
})
}
export class FireworkSettings {
baseNode; // 父节点
nodeList; // 火花节点的array
pos; // 发射点
side; // 发射方向
range; // 扩散范围
number; // 发射数量
scalseRange; // 缩放范围
constructor(baseNode, nodeList,
pos = cc.v2(0, 0),
side = cc.v2(0, 100),
range = 50,
number = 100,
scalseRange = 0
) {
this.baseNode = baseNode;
this.nodeList = nodeList;
this.pos = pos;
this.side = side;
this.range = range;
this.number = number;
this.scalseRange = scalseRange;
}
static copy(firework) {
return new FireworkSettings(
firework.baseNode,
firework.nodeList,
firework.pos,
firework.side,
firework.range,
firework.number,
);
}
}
export async function showFireworks(fireworkSettings) {
const { baseNode, nodeList, pos, side, range, number, scalseRange } = fireworkSettings;
new Array(number).fill(' ').forEach(async (_, i) => {
let rabbonNode = new cc.Node();
rabbonNode.parent = baseNode;
rabbonNode.x = pos.x;
rabbonNode.y = pos.y;
rabbonNode.angle = 60 * Math.random() - 30;
let node = cc.instantiate(nodeList[RandomInt(nodeList.length)]);
node.parent = rabbonNode;
node.active = true;
node.x = 0;
node.y = 0;
node.angle = 0;
node.scale = (Math.random() - 0.5) * scalseRange + 1;
const rate = Math.random();
const angle = Math.PI * (Math.random() * 2 - 1);
await asyncTweenBy(rabbonNode, 0.3, {
x: side.x * rate + Math.cos(angle) * range * rate,
y: side.y * rate + Math.sin(angle) * range * rate
}, {
easing: 'quadIn'
});
cc.tween(rabbonNode)
.by(8, { y: -2000 })
.start();
cc.tween(rabbonNode)
.to(5, { scale: (Math.random() - 0.5) * scalseRange + 1 })
.start();
rabbonFall(rabbonNode);
await asyncDelay(Math.random());
cc.tween(node)
.by(0.15, { x: -10, angle: -10 })
.by(0.3, { x: 20, angle: 20 })
.by(0.15, { x: -10, angle: -10 })
.union()
.repeatForever()
.start();
cc.tween(rabbonNode)
.delay(5)
.to(0.3, { opacity: 0 })
.call(() => {
node.stopAllActions();
node.active = false;
node.parent = null;
node = null;
})
.start();
});
}
async function rabbonFall(node) {
const time = 1 + Math.random();
const offsetX = RandomInt(-200, 200) * time;
await asyncTweenBy(node, time, { x: offsetX, angle: offsetX * 60 / 200 });
rabbonFall(node);
}
export async function asyncTweenTo(node, duration, obj, ease = undefined) {
return new Promise((resolve, reject) => {
try {
cc.tween(node)
.to(duration, obj, ease)
.call(() => {
resolve(null);
})
.start();
} catch (e) {
reject(e);
}
});
}
export async function asyncTweenBy(node, duration, obj, ease = undefined) {
return new Promise((resolve, reject) => {
try {
cc.tween(node)
.by(duration, obj, ease)
.call(() => {
resolve(null);
})
.start();
} catch (e) {
reject(e);
}
});
}
export function showTrebleFirework(baseNode, rabbonList) {
const middle = new FireworkSettings(baseNode, rabbonList);
middle.pos = cc.v2(0, -400);
middle.side = cc.v2(0, 1000);
middle.range = 200;
middle.number = 100;
middle.scalseRange = 0.4;
const left = FireworkSettings.copy(middle);
left.pos = cc.v2(-600, -400);
left.side = cc.v2(200, 1000);
const right = FireworkSettings.copy(middle);
right.pos = cc.v2(600, -400);
right.side = cc.v2(-200, 1000);
showFireworks(middle);
showFireworks(left);
showFireworks(right);
}
export function onHomeworkFinish() {
const middleLayer = cc.find('middleLayer');
if (middleLayer) {
const middleLayerComponent = middleLayer.getComponent('middleLayer');
if (middleLayerComponent.role == 'student') {
middleLayerComponent.onHomeworkFinish(() => { });
}
} else {
console.log('onHomeworkFinish');
}
}