cocos creator寫遊戲還是很友好的，官方文件給的也挺全。今天帶大家來用cocoscreator實現描摹數字／描摹英文字母／描摹直線曲線的功能。
先看下效果圖
實現思路
這裡我們已描摹數字2為例，來講下具體實現思路。其實我們不管是做描摹，還是做畫線，畫圖形。我們都是通過直線連結一個個點來實現描摹功能的。
- 所以我們實現描摹的首要一點就是要獲取到描摹的一個個的軌跡的座標點。下面我們就如何獲取到這一串的軌跡座標點來做文章
獲取軌跡座標點
- 1，獲取座標點的方式有很多種，但是比較靠譜的還是要讓ui妹子，給我們提供下面的資料,下面資料是ui妹子用ps畫2的時候的一些重要的點
/* 描摹2的貝塞爾軌跡圖需要ui妹子出，就是ui妹子用ps畫2時的一些軌跡點
bezier2Path.move(to: NSPoint(x: 26, y: 287))
bezier2Path.curve(to: NSPoint(x: 122, y: 414), controlPoint1: NSPoint(x: 26, y: 287), controlPoint2: NSPoint(x: 25, y: 400))
bezier2Path.curve(to: NSPoint(x: 200, y: 247), controlPoint1: NSPoint(x: 219, y: 428), controlPoint2: NSPoint(x: 257, y: 323))
bezier2Path.curve(to: NSPoint(x: 38, y: 42), controlPoint1: NSPoint(x: 143, y: 171), controlPoint2: NSPoint(x: 38, y: 42))
bezier2Path.curve(to: NSPoint(x: 46, y: 26), controlPoint1: NSPoint(x: 38, y: 42), controlPoint2: NSPoint(x: 30, y: 26))
bezier2Path.curve(to: NSPoint(x: 234, y: 26), controlPoint1: NSPoint(x: 62, y: 26), controlPoint2: NSPoint(x: 234, y: 26))
*/
複製程式碼- 2，拿到ui妹子給的資料以後，我們就來寫程式碼，獲取我們所需要的一系列座標點，我們需要建立如下圖所示的三個js指令碼檔案
- 3，接下來在cocos-creator裡開始建立描摹的基本的遊戲場景
- 4，建立描摹所需的節點和元件
- 5，分別看下第4步建立的四個節點
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複製程式碼- 6，我們把上圖中獲取到的座標點複製到如下圖guiji.js裡箭頭所示位置
實現描摹
我們在獲取到描摹2所需的座標點以後，接下來就要來實現描摹了。 這裡有個注意點，我們在自動描摹2獲取座標點時把 Is Audio Get Gj勾上，現在我們需要讓使用者自己手動描摹，就不要把 Is Audio Get Gj勾上了。
下面把涉及到的幾個js指令碼程式碼全部貼出來
- guiji.js 主要用來儲存ui給的資料和獲取到的軌跡座標點
cc.Class({
extends: cc.Component,
properties: {
// values: [cc.Vec2],
},
// LIFE-CYCLE CALLBACKS:
onLoad () {
this.gj = [];
this.arr = [];
/* 描摹2的貝塞爾軌跡圖需要ui妹子出，就是ui妹子用ps畫2時的一些軌跡點
bezier2Path.move(to: NSPoint(x: 26, y: 287))
bezier2Path.curve(to: NSPoint(x: 122, y: 414), controlPoint1: NSPoint(x: 26, y: 287), controlPoint2: NSPoint(x: 25, y: 400))
bezier2Path.curve(to: NSPoint(x: 200, y: 247), controlPoint1: NSPoint(x: 219, y: 428), controlPoint2: NSPoint(x: 257, y: 323))
bezier2Path.curve(to: NSPoint(x: 38, y: 42), controlPoint1: NSPoint(x: 143, y: 171), controlPoint2: NSPoint(x: 38, y: 42))
bezier2Path.curve(to: NSPoint(x: 46, y: 26), controlPoint1: NSPoint(x: 38, y: 42), controlPoint2: NSPoint(x: 30, y: 26))
bezier2Path.curve(to: NSPoint(x: 234, y: 26), controlPoint1: NSPoint(x: 62, y: 26), controlPoint2: NSPoint(x: 234, y: 26))
*/
/**
* 根據上門ui妹子給出的軌跡點，寫出下面軌跡陣列。
* type：moveto 移動到point01，
* type：bezier 畫貝塞爾曲線，point01，point02，point03是貝塞爾的三個參考點
* time：時長
*
*/
this.gj[2] = [
{"type": "moveto","point01" : cc.v2(26, 287)},
{"type" :"bezier","time":1,"point01" : cc.v2(26, 287),"point02" : cc.v2(25, 400),"point03" : cc.v2(122, 414)},
{"type" : "bezier","time":1,"point01" : cc.v2(219, 428),"point02" : cc.v2(257, 323),"point03" : cc.v2(200, 247)},
{"type" : "bezier","time":1,"point01" : cc.v2(143, 171),"point02" : cc.v2(38, 42),"point03" : cc.v2(38, 42)},
{"type" : "bezier","time":1,"point01" : cc.v2(38, 42),"point02" : cc.v2(30, 26),"point03" : cc.v2(46, 26)},
{"type" : "bezier","time":1,"point01" : cc.v2(62, 26),"point02" : cc.v2(234, 26),"point03" : cc.v2(234, 26)},
];
/**
* 獲取到的描摹2的座標點
* @type {*[]}
*/
this.arr[2] = []
// [{"x":26,"y":287},{"x":26,"y":287},{"x":29.82,"y":319.15},{"x":33.18,"y":332.37},{"x":34.7,"y":337.19},{"x":37.35,"y":344.55},{"x":38.34,"y":347.02},{"x":44.76,"y":360.52},{"x":48.43,"y":366.77},{"x":52.16,"y":372.35},{"x":57.72,"y":379.49},{"x":60.9,"y":383.08},{"x":62.23,"y":384.48},{"x":66.65,"y":388.78},{"x":68.13,"y":390.1},{"x":70.37,"y":392},{"x":72.83,"y":393.96},{"x":76.27,"y":396.49},{"x":79.19,"y":398.46},{"x":82.19,"y":400.33},{"x":85.58,"y":402.25},{"x":89.87,"y":404.45},{"x":93.25,"y":406},{"x":96.9,"y":407.5},{"x":100.9,"y":408.97},{"x":105.04,"y":410.3},{"x":109.52,"y":411.53},{"x":113.86,"y":412.55},{"x":118.55,"y":413.45},{"x":123.86,"y":414.25},{"x":128.12,"y":414.73},{"x":132.74,"y":415.09},{"x":143.79,"y":415.17},{"x":150.38,"y":414.66},{"x":152.7,"y":414.38},{"x":155.15,"y":414.02},{"x":163.86,"y":412.19},{"x":174.63,"y":408.59},{"x":177.88,"y":407.17},{"x":181.39,"y":405.44},{"x":186.88,"y":402.28},{"x":195.23,"y":396.22},{"x":199.49,"y":392.42},{"x":205.49,"y":386},{"x":208.55,"y":382.13},{"x":215.56,"y":370.97},{"x":217.27,"y":367.54},{"x":218.88,"y":363.94},{"x":220.18,"y":360.7},{"x":221.35,"y":357.44},{"x":222.47,"y":353.88},{"x":223.53,"y":350.02},{"x":224.37,"y":346.43},{"x":225.1,"y":342.69},{"x":225.68,"y":338.98},{"x":226.16,"y":335.01},{"x":226.47,"y":331.21},{"x":226.66,"y":327.32},{"x":226.71,"y":323.16},{"x":226.63,"y":319.43},{"x":226.41,"y":315.43},{"x":226.01,"y":311.12},{"x":225.51,"y":307.2},{"x":224.87,"y":303.24},{"x":224.05,"y":299.06},{"x":223.11,"y":294.97},{"x":221.94,"y":290.63},{"x":220.71,"y":286.62},{"x":219.36,"y":282.66},{"x":217.86,"y":278.71},{"x":216.09,"y":274.46},{"x":214.24,"y":270.43},{"x":212.31,"y":266.56},{"x":210.12,"y":262.5},{"x":207.88,"y":258.67},{"x":205.33,"y":254.61},{"x":202.79,"y":250.85},{"x":200.09,"y":247.11},{"x":197.02,"y":243.03},{"x":194.26,"y":239.38},{"x":191.24,"y":235.39},{"x":188,"y":231.14},{"x":184.88,"y":227.06},{"x":181.67,"y":222.87},{"x":178.43,"y":218.65},{"x":174.4,"y":213.43},{"x":171.71,"y":209.94},{"x":168.33,"y":205.58},{"x":164.78,"y":201.01},{"x":161.22,"y":196.44},{"x":157.59,"y":191.79},{"x":154.15,"y":187.38},{"x":150.75,"y":183.04},{"x":142.35,"y":172.36},{"x":138.7,"y":167.72},{"x":135.12,"y":163.17},{"x":131.55,"y":158.66},{"x":127.95,"y":154.11},{"x":124.36,"y":149.58},{"x":120.8,"y":145.1},{"x":117.29,"y":140.67},{"x":113.71,"y":136.17},{"x":110.23,"y":131.79},{"x":106.71,"y":127.38},{"x":103.3,"y":123.1},{"x":99.92,"y":118.87},{"x":96.57,"y":114.68},{"x":93.36,"y":110.67},{"x":90.05,"y":106.54},{"x":86.88,"y":102.57},{"x":83.67,"y":98.58},{"x":80.57,"y":94.71},{"x":77.65,"y":91.08},{"x":74.71,"y":87.42},{"x":71.75,"y":83.75},{"x":69.13,"y":80.49},{"x":66.47,"y":77.19},{"x":63.93,"y":74.03},{"x":61.44,"y":70.95},{"x":58.83,"y":67.72},{"x":56.71,"y":65.09},{"x":54.52,"y":62.38},{"x":52.57,"y":59.98},{"x":50.6,"y":57.53},{"x":48.77,"y":55.28},{"x":47.12,"y":53.24},{"x":45.56,"y":51.32},{"x":44.07,"y":49.48},{"x":42.82,"y":47.93},{"x":41.7,"y":46.55},{"x":40.7,"y":45.32},{"x":39.83,"y":44.26},{"x":39.15,"y":43.41},{"x":38.59,"y":42.72},{"x":38.24,"y":42.29},{"x":38.04,"y":42.05},{"x":38,"y":42},{"x":37.99,"y":41.98},{"x":37.97,"y":41.93},{"x":37.93,"y":41.86},{"x":37.88,"y":41.76},{"x":37.83,"y":41.64},{"x":37.77,"y":41.5},{"x":37.7,"y":41.34},{"x":37.62,"y":41.16},{"x":37.54,"y":40.96},{"x":37.45,"y":40.74},{"x":37.36,"y":40.51},{"x":37.26,"y":40.24},{"x":37.16,"y":39.97},{"x":37.07,"y":39.69},{"x":36.97,"y":39.4},{"x":36.87,"y":39.08},{"x":36.77,"y":38.77},{"x":36.67,"y":38.43},{"x":36.58,"y":38.08},{"x":36.49,"y":37.74},{"x":36.4,"y":37.37},{"x":36.32,"y":36.99},{"x":36.25,"y":36.62},{"x":36.19,"y":36.24},{"x":36.13,"y":35.85},{"x":36.08,"y":35.46},{"x":36.04,"y":35.06},{"x":36.02,"y":34.66},{"x":36,"y":34.24},{"x":36,"y":33.87},{"x":36.01,"y":33.47},{"x":36.04,"y":33.06},{"x":36.08,"y":32.67},{"x":36.14,"y":32.27},{"x":36.21,"y":31.89},{"x":36.31,"y":31.48},{"x":36.42,"y":31.12},{"x":36.55,"y":30.75},{"x":36.7,"y":30.38},{"x":36.88,"y":30.03},{"x":37.07,"y":29.68},{"x":37.3,"y":29.34},{"x":37.54,"y":29.01},{"x":37.81,"y":28.7},{"x":38.12,"y":28.39},{"x":38.43,"y":28.11},{"x":38.78,"y":27.83},{"x":39.16,"y":27.57},{"x":39.57,"y":27.33},{"x":40,"y":27.11},{"x":40.49,"y":26.9},{"x":40.99,"y":26.71},{"x":41.53,"y":26.54},{"x":42.08,"y":26.4},{"x":42.71,"y":26.27},{"x":43.36,"y":26.17},{"x":44.03,"y":26.09},{"x":44.73,"y":26.04},{"x":45.49,"y":26.01},{"x":46.32,"y":26},{"x":47.34,"y":26},{"x":48.6,"y":26},{"x":50.12,"y":26},{"x":51.86,"y":26},{"x":53.85,"y":26},{"x":55.97,"y":26},{"x":58.3,"y":26},{"x":60.88,"y":26},{"x":63.77,"y":26},{"x":67.03,"y":26},{"x":69.84,"y":26},{"x":73.2,"y":26},{"x":76.55,"y":26},{"x":80.03,"y":26},{"x":83.7,"y":26},{"x":87.29,"y":26},{"x":91.78,"y":26},{"x":95.16,"y":26},{"x":99.45,"y":26},{"x":103.5,"y":26},{"x":107.94,"y":26},{"x":112.12,"y":26},{"x":116.42,"y":26},{"x":120.68,"y":26},{"x":125.67,"y":26},{"x":129.78,"y":26},{"x":134.18,"y":26},{"x":138.94,"y":26},{"x":143.27,"y":26},{"x":147.89,"y":26},{"x":152.33,"y":26},{"x":156.61,"y":26},{"x":161.36,"y":26},{"x":165.79,"y":26},{"x":169.94,"y":26},{"x":174.14,"y":26},{"x":178.56,"y":26},{"x":182.43,"y":26},{"x":186.31,"y":26},{"x":190.5,"y":26},{"x":194.05,"y":26},{"x":198.26,"y":26},{"x":201.95,"y":26},{"x":204.92,"y":26},{"x":208.06,"y":26},{"x":211.39,"y":26},{"x":214.21,"y":26},{"x":217.2,"y":26},{"x":219.86,"y":26},{"x":222.18,"y":26},{"x":224.46,"y":26},{"x":226.53,"y":26},{"x":228.26,"y":26},{"x":229.87,"y":26},{"x":231.16,"y":26},{"x":232.27,"y":26},{"x":233.13,"y":26},{"x":233.67,"y":26},{"x":233.96,"y":26}]
},
//獲取軌跡點
getGj (num) {
return this.gj[num]
},
//獲取座標點
getXYPoints (num) {
return this.arr[num]
},
});
複製程式碼- mmGraphics.js 描摹的畫筆實現
cc.Class({
extends: cc.Component,
properties: {
touchNode: {
default: null,
type: cc.Node,
tooltip: '繪製點（箭頭）'
},
guijiNode: {
default: null,
type: cc.Node,
tooltip: '描摹區域'
},
isMiaoMobg: {
default: false,
type: Boolean,
tooltip: '是否作為描摹的底層'
},
isAudioGetGj: {
default: false,
type: Boolean,
tooltip: '是否能自動描摹獲取軌跡座標點'
}
},
// LIFE-CYCLE CALLBACKS:
onLoad() {
console.log(this.guijiNode);
let miaomoNum = 2;
// alert(1);
this.arr = this.guijiNode.getComponent("guiji").getXYPoints(miaomoNum);
this.gj = this.guijiNode.getComponent("guiji").getGj(miaomoNum);
},
start() {
cc.log("畫筆開始繪製");
this.graphics = this.getComponent(cc.Graphics);
let lv = 1;
if (this.isMiaoMobg) {//繪製描摹底部
for (let index = 0; index < this.gj.length; index++) {
const element = this.gj[index];
if (element.type === "moveto") {
this.graphics.moveTo(element.point01.x, element.point01.y);
} else if (element.type === "bezier") {
this.graphics.bezierCurveTo(element.point01.x, element.point01.y, element.point02.x, element.point02.y, element.point03.x, element.point03.y);
} else if (element.type === "lineto") {
this.graphics.lineTo(element.point01.x, element.point01.y)
}
}
this.graphics.stroke();
} else {
if (this.isAudioGetGj) {
this.actionRun = true;
this.index = 0;
this.loadArr = [];
this.touchNode.x = this.gj[0].point01.x;
this.touchNode.y = this.gj[0].point01.y;
let seq = cc.callFunc(() => {
}, this);
for (let index = 0; index < this.gj.length; index++) {
const element = this.gj[index];
if (element.type === "moveto") {
cc.log("moveto: " + element.point01.x + " " + element.point01.y)
} else if (element.type === "bezier") {
let bezier = [element.point01, element.point02, element.point03];
let bezierTo = cc.bezierTo(element.time, bezier);
seq = cc.sequence(seq, bezierTo)
} else if (element.type === "lineto") {
let moveTo = cc.moveTo(element.time, element.point01);
seq = cc.sequence(seq, moveTo)
}
}
let callFunc = cc.callFunc(() => {
this.actionRun = false;
cc.log(JSON.stringify(this.loadArr));
}, this);
seq = cc.sequence(seq, callFunc);
this.touchNode.runAction(seq);
}
}
},
update(dt) {
if (this.isAudioGetGj) {
if (!this.isMiaoMobg && this.actionRun) {
// cc.log("this.touchNode update: "+this.touchNode.x+" "+this.touchNode.y)
this.loadArr[this.index] = cc.v2(Math.round(this.touchNode.x * 100) / 100, Math.round(this.touchNode.y * 100) / 100)
this.index += 1
}
}
},
setPos(index) {
if (this.isMiaoMobg) {
return
}
for (let a = this.newIndex; a < index; a++) {
const elementold = this.arr[a - 1] || this.arr[a];
const elementnew = this.arr[a];
this.graphics.moveTo(elementold.x, elementold.y);
this.graphics.lineTo(elementnew.x, elementnew.y);
this.graphics.stroke();
this.graphics.fill();
}
this.newIndex = index;
},
clearDraw() {
this.graphics.clear();
// this.touchNode.x = this.arr[0].x
// this.touchNode.y = this.arr[0].y
this.touchNode.x = this.gj[0].point01.x;
this.touchNode.y = this.gj[0].point01.y;
}
// update (dt) {},
});
複製程式碼- mmTouch.js 處理使用者觸控實現描摹
cc.Class({
extends: cc.Component,
properties: {
//描摹的畫筆
graphicsNode: {
default: null,
type: cc.Node,
tooltip: '用來描摹的畫筆'
},
//在那個區域描摹
guijiNode: {
default: null,
type: cc.Node,
tooltip: '軌跡所在區域'
}
},
onLoad() {
let miaomoNum = 2;//描摹2
//獲取描摹2需要的軌跡點
this.arr = this.guijiNode.getComponent("guiji").getXYPoints(miaomoNum);
},
//設定箭頭方向（包括描摹過程中箭頭的方向）
initAngle() {
let angle = this.getAngle(this.arr[0].x, this.arr[0].y, this.arr[2].x, this.arr[2].y);
this.node.rotation = -angle;
},
start() {
if (this.arr.length === 0) {
return
}
this.initAngle();
this.init();
},
init() {
let node = this.node;
node.x = this.arr[0].x;
node.y = this.arr[0].y;
this.gameOver = false;
this.arrIndex = 0;
node.on(cc.Node.EventType.TOUCH_START, (event) => {
this.touchBegin = true
}, node);
node.on(cc.Node.EventType.TOUCH_MOVE, (event) => {
if (!this.touchBegin) {
return
}
let nodeWorldPos = this.node.parent.convertToWorldSpaceAR(cc.v2(this.node.x, this.node.y));
let position = event.touch.getLocation();
cc.log("position" + position.x, position.y);
cc.log("nodeWorldPos" + nodeWorldPos.x, nodeWorldPos.y);
this.move(cc.v2(position.x - nodeWorldPos.x, position.y - nodeWorldPos.y));
}, node);
node.on(cc.Node.EventType.TOUCH_END, (event) => {
this.touchBegin = false
}, node);
},
//箭頭復原動畫
interruptAnm(position) {
let action = cc.sequence(
cc.moveBy(0.2, position.x, position.y),
cc.moveBy(0.2, -position.x, -position.y)
);
this.node.runAction(action);
},
//獲取描摹過程中，箭頭要跟著軌跡旋轉的角度let
getAngle(x1, y1, x2, y2) {
// 直角的邊長
let x = Math.abs(x1 - x2);
let y = Math.abs(y1 - y2);
let z = Math.sqrt(x * x + y * y);
let angle = Math.round((Math.asin(y / z) / Math.PI * 180));
if (y2 > y1 && x2 < x1) {
angle = 180 - angle
} else if (y2 < y1 && x2 < x1) {
angle = 180 + angle
} else if (y2 < y1 && x2 > x1) {
angle = 360 - angle
}
return angle;
},
//根據軌跡座標點描摹
move(position) {
if (this.gameOver) {
cc.log("遊戲已經結束，順利的描摹出來2了 !!!");
return
}
let dx = position.x + this.node.x;
let dy = position.y + this.node.y;
let node_d = (position.x) * (position.x) + (position.y) * (position.y)
if (node_d > 120 * 120) {
cc.log(" Beyond the scope Beyond the scope Beyond the scope ")
this.interruptAnm(position);
this.touchBegin = false;
return
}
let range = 20;
let distance = 80;
let max = this.arrIndex + range;
if (max >= this.arr.length) {
// this.touchBegin = false
// this.gameOver = true
// cc.log("game over ")
// return
max = this.arr.length
}
for (let index = this.arrIndex; index < max; index++) {
// let index = max
const element = this.arr[index];
// cc.log("index "+index)
let d = (dx - element.x) * (dx - element.x) + (dy - element.y) * (dy - element.y)
if (d < distance * distance) {
this.graphicsNode.getComponent('mmGraphics').setPos(index);
this.arrIndex = index;
this.node.x = element.x;
this.node.y = element.y;
if (index === this.arr.length - 1) {
this.drawEnd()
} else {
let angle = this.getAngle(this.arr[index].x, this.arr[index].y, this.arr[index + 1].x, this.arr[index + 1].y);
this.node.rotation = -angle;
}
}
}
},
//描摹完成
drawEnd() {
this.touchBegin = false;
this.gameOver = true;
this.scheduleOnce(() => {
this.graphicsNode.getComponent('mmGraphics').clearDraw();
this.gameOver = false;
this.arrIndex = 0;
this.initAngle()
}, 2);
},
});
複製程式碼到這裡就實現了用cocoscreator描摹數字2的效果，我們再描摹別的數字或者描摹英文字母，圖形都是同樣的道理，先找ui妹子要到ps描摹的參考點，然後根據參考點生成軌跡座標點，然後再根據軌跡座標點實現描摹即可。