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@@ -1,396 +1,393 @@
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class Handwriting {
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- // 内置数据
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- ctx = '';
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- canvasWidth = 300;
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- canvasHeight = 900;
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- linePrack = []; //划线轨迹 ; 生成线条的实际点
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- currentLine = [];
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- transparent = 1; // 透明度
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- pressure = 0.5; // 默认压力
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- smoothness = 100; //顺滑度,用60的距离来计算速度
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- lineSize = 1.5; // 笔记倍数
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- lineMin = 0.5; // 最小笔画半径
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- lineMax = 2; // 最大笔画半径
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- currentPoint = {};
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- firstTouch = true; // 第一次触发
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- radius = 1; //画圆的半径
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- cutArea = {
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- top: 0,
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- right: 0,
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- bottom: 0,
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- left: 0
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- }; //裁剪区域
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- lastPoint = 0;
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- chirography = []; //笔迹
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- startY = 0;
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- deltaY = 0;
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- startValue = 0;
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- constructor(opts) {
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+ // 内置数据
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+ ctx = '';
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+ canvasWidth = 300;
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+ canvasHeight = 900;
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+ linePrack = []; //划线轨迹 ; 生成线条的实际点
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+ currentLine = [];
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+ transparent = 1; // 透明度
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+ pressure = 0.5; // 默认压力
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+ smoothness = 100; //顺滑度,用60的距离来计算速度
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+ lineSize = 1.5; // 笔记倍数
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+ lineMin = 0.5; // 最小笔画半径
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+ lineMax = 2; // 最大笔画半径
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+ currentPoint = {};
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+ firstTouch = true; // 第一次触发
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+ radius = 1; //画圆的半径
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+ cutArea = {
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+ top: 0,
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+ right: 0,
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+ bottom: 0,
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+ left: 0
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+ }; //裁剪区域
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+ lastPoint = 0;
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+ chirography = []; //笔迹
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+ startY = 0;
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+ deltaY = 0;
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+ startValue = 0;
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+ constructor(opts) {
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console.log(opts);
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- this.lineColor = opts.lineColor || '#1A1A1A' // 颜色
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- this.slideValue = opts.slideValue || 50
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+ this.lineColor = opts.lineColor || '#1A1A1A' // 颜色
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+ this.slideValue = opts.slideValue || 50
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this.canvasName = opts.canvasName || 'handWriting'
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- this.init()
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- }
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- init() {
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- this.ctx = uni.createCanvasContext(this.canvasName)
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- var query = uni.createSelectorQuery();
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- query.select('.handCenter').boundingClientRect(rect => {
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- console.log(rect)
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- this.canvasWidth = rect.width;
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- this.canvasHeight = rect.height;
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- }).exec();
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- this.selectSlideValue(this.slideValue);
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- }
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+ this.init()
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+ }
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+ init() {
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+ this.ctx = uni.createCanvasContext(this.canvasName)
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+ var query = uni.createSelectorQuery();
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+ query.select('.handCenter').boundingClientRect(rect => {
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+ console.log(rect)
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+ this.canvasWidth = rect.width;
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+ this.canvasHeight = rect.height;
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+ }).exec();
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+ this.selectSlideValue(this.slideValue);
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+ }
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- // 笔迹开始
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- uploadScaleStart(event) {
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- console.log('start');
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+ // 笔迹开始
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+ uploadScaleStart(event) {
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let e = event.mp
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- console.log(e.touches[0])
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- if (e.type != 'touchstart') return false;
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- this.ctx.setFillStyle(this.lineColor); // 初始线条设置颜色
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- this.ctx.setGlobalAlpha(this.transparent); // 设置半透明
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- this.currentPoint = {
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- x: e.touches[0].x,
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- y: e.touches[0].y
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- }
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- this.currentLine.unshift({
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- time: new Date().getTime(),
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- dis: 0,
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- x: this.currentPoint.x,
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- y: this.currentPoint.y
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- })
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- if (this.firstTouch) {
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- this.cutArea = {
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- top: this.currentPoint.y,
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- right: this.currentPoint.x,
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- bottom: this.currentPoint.y,
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- left: this.currentPoint.x
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- }
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- this.firstTouch = false
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- }
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- this.pointToLine(this.currentLine);
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- }
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- // 笔迹移动
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- uploadScaleMove(event) {
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- console.log('move');
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+ if (e.type != 'touchstart') return false;
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+ this.ctx.setFillStyle(this.lineColor); // 初始线条设置颜色
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+ this.ctx.setGlobalAlpha(this.transparent); // 设置半透明
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+ this.currentPoint = {
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+ x: e.touches[0].x,
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+ y: e.touches[0].y
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+ }
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+ this.currentLine.unshift({
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+ time: new Date().getTime(),
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+ dis: 0,
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+ x: this.currentPoint.x,
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+ y: this.currentPoint.y
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+ })
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+ if (this.firstTouch) {
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+ this.cutArea = {
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+ top: this.currentPoint.y,
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+ right: this.currentPoint.x,
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+ bottom: this.currentPoint.y,
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+ left: this.currentPoint.x
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+ }
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+ this.firstTouch = false
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+ }
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+ this.pointToLine(this.currentLine);
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+ }
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+ // 笔迹移动
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+ uploadScaleMove(event) {
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let e = event.mp
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- if (e.type != 'touchmove') return false;
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- if (e.cancelable) {
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- // 判断默认行为是否已经被禁用
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- if (!e.defaultPrevented) {
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- e.preventDefault();
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- }
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- }
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- let point = {
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- x: e.touches[0].x,
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- y: e.touches[0].y
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- }
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- //测试裁剪
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- if (point.y < this.cutArea.top) {
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- this.cutArea.top = point.y;
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- }
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- if (point.y < 0) this.cutArea.top = 0;
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+ if (e.type != 'touchmove') return false;
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+ if (e.cancelable) {
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+ // 判断默认行为是否已经被禁用
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+ if (!e.defaultPrevented) {
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+ e.preventDefault();
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+ }
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+ }
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+ let point = {
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+ x: e.touches[0].x,
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+ y: e.touches[0].y
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+ }
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+ //测试裁剪
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+ if (point.y < this.cutArea.top) {
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+ this.cutArea.top = point.y;
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+ }
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+ if (point.y < 0) this.cutArea.top = 0;
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- if (point.x > this.cutArea.right) {
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- this.cutArea.right = point.x;
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- }
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- if (this.canvasWidth - point.x <= 0) {
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- this.cutArea.right = this.canvasWidth;
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- }
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- if (point.y > this.cutArea.bottom) {
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- this.cutArea.bottom = point.y;
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- }
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- if (this.canvasHeight - point.y <= 0) {
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- this.cutArea.bottom = this.canvasHeight;
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- }
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- if (point.x < this.cutArea.left) {
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- this.cutArea.left = point.x;
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- }
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- if (point.x < 0) this.cutArea.left = 0;
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+ if (point.x > this.cutArea.right) {
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+ this.cutArea.right = point.x;
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+ }
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+ if (this.canvasWidth - point.x <= 0) {
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+ this.cutArea.right = this.canvasWidth;
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+ }
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+ if (point.y > this.cutArea.bottom) {
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+ this.cutArea.bottom = point.y;
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+ }
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+ if (this.canvasHeight - point.y <= 0) {
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+ this.cutArea.bottom = this.canvasHeight;
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+ }
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+ if (point.x < this.cutArea.left) {
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+ this.cutArea.left = point.x;
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+ }
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+ if (point.x < 0) this.cutArea.left = 0;
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- this.lastPoint = this.currentPoint;
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- this.currentPoint = point
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- this.currentLine.unshift({
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- time: new Date().getTime(),
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- dis: this.distance(this.currentPoint, this.lastPoint, 'move'),
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- x: point.x,
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- y: point.y
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- })
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- this.pointToLine(this.currentLine);
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- }
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- // 笔迹结束
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- uploadScaleEnd(event) {
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+ this.lastPoint = this.currentPoint;
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+ this.currentPoint = point
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+ this.currentLine.unshift({
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+ time: new Date().getTime(),
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+ dis: this.distance(this.currentPoint, this.lastPoint, 'move'),
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+ x: point.x,
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+ y: point.y
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+ })
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+ this.pointToLine(this.currentLine);
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+ }
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+ // 笔迹结束
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+ uploadScaleEnd(event) {
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let e = event.mp
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- if (e.type != 'touchend') return 0;
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- console.log(e);
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- let point = {
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- x: e.changedTouches[0].x,
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- y: e.changedTouches[0].y
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- }
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-
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- this.lastPoint = this.currentPoint;
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- this.currentPoint = point
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- this.currentLine.unshift({
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- time: new Date().getTime(),
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- dis: this.distance(this.currentPoint, this.lastPoint, 'end'),
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- x: point.x,
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- y: point.y
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- })
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- if (this.currentLine.length > 2) {
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- var info = (this.currentLine[0].time - this.currentLine[this.currentLine.length - 1].time) / this.currentLine.length;
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- //$("#info").text(info.toFixed(2));
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- }
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- //一笔结束,保存笔迹的坐标点,清空,当前笔迹
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- //增加判断是否在手写区域;
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- this.pointToLine(this.currentLine);
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- var currentChirography = {
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- lineSize: this.lineSize,
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- lineColor: this.lineColor
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- };
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- this.chirography.unshift(currentChirography);
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- this.linePrack.unshift(this.currentLine);
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- this.currentLine = []
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- }
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- retDraw() {
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- this.ctx.clearRect(0, 0, 700, 730)
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- this.ctx.draw()
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- }
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+ if (e.type != 'touchend') return 0;
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+ let point = {
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+ x: e.changedTouches[0].x,
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+ y: e.changedTouches[0].y
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+ }
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- //画两点之间的线条;参数为:line,会绘制最近的开始的两个点;
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- pointToLine(line) {
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- this.calcBethelLine(line);
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- // this.calcBethelLine1(line);
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- return;
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- }
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- //计算插值的方式;
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- calcBethelLine(line) {
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- if (line.length <= 1) {
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- line[0].r = this.radius;
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- return;
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- }
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- let x0, x1, x2, y0, y1, y2, r0, r1, r2, len, lastRadius, dis = 0,
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- time = 0,
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- curveValue = 0.5;
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- if (line.length <= 2) {
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- x0 = line[1].x
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- y0 = line[1].y
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- x2 = line[1].x + (line[0].x - line[1].x) * curveValue;
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- y2 = line[1].y + (line[0].y - line[1].y) * curveValue;
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- //x2 = line[1].x;
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- //y2 = line[1].y;
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- x1 = x0 + (x2 - x0) * curveValue;
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- y1 = y0 + (y2 - y0) * curveValue;;
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+ this.lastPoint = this.currentPoint;
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+ this.currentPoint = point
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+ this.currentLine.unshift({
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+ time: new Date().getTime(),
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+ dis: this.distance(this.currentPoint, this.lastPoint, 'end'),
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+ x: point.x,
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+ y: point.y
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+ })
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+ if (this.currentLine.length > 2) {
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+ var info = (this.currentLine[0].time - this.currentLine[this.currentLine.length - 1].time) / this.currentLine.length;
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+ //$("#info").text(info.toFixed(2));
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+ }
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+ //一笔结束,保存笔迹的坐标点,清空,当前笔迹
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+ //增加判断是否在手写区域;
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+ this.pointToLine(this.currentLine);
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+ var currentChirography = {
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+ lineSize: this.lineSize,
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+ lineColor: this.lineColor
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+ };
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+ this.chirography.unshift(currentChirography);
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+ this.linePrack.unshift(this.currentLine);
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+ this.currentLine = []
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+ }
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+ retDraw() {
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+ this.ctx.clearRect(0, 0, 700, 730)
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+ this.ctx.draw()
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+ }
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- } else {
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- x0 = line[2].x + (line[1].x - line[2].x) * curveValue;
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- y0 = line[2].y + (line[1].y - line[2].y) * curveValue;
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- x1 = line[1].x;
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- y1 = line[1].y;
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- x2 = x1 + (line[0].x - x1) * curveValue;
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- y2 = y1 + (line[0].y - y1) * curveValue;
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- }
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- //从计算公式看,三个点分别是(x0,y0),(x1,y1),(x2,y2) ;(x1,y1)这个是控制点,控制点不会落在曲线上;实际上,这个点还会手写获取的实际点,却落在曲线上
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- len = this.distance({
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- x: x2,
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- y: y2
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- }, {
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- x: x0,
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- y: y0
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- }, 'calc');
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- lastRadius = this.radius;
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- for (let n = 0; n < line.length - 1; n++) {
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- dis += line[n].dis;
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- time += line[n].time - line[n + 1].time;
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- if (dis > this.smoothness) break;
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- }
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- this.radius = Math.min(time / len * this.pressure + this.lineMin, this.lineMax) * this.lineSize
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- line[0].r = this.radius;
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- //计算笔迹半径;
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- if (line.length <= 2) {
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- r0 = (lastRadius + this.radius) / 2;
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- r1 = r0;
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- r2 = r1;
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- //return;
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- } else {
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- r0 = (line[2].r + line[1].r) / 2;
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- r1 = line[1].r;
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- r2 = (line[1].r + line[0].r) / 2;
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- }
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- let n = 5;
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- let point = [];
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- for (let i = 0; i < n; i++) {
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- let t = i / (n - 1);
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- let x = (1 - t) * (1 - t) * x0 + 2 * t * (1 - t) * x1 + t * t * x2;
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- let y = (1 - t) * (1 - t) * y0 + 2 * t * (1 - t) * y1 + t * t * y2;
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- let r = lastRadius + (this.radius - lastRadius) / n * i;
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- point.push({
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- x: x,
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- y: y,
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- r: r
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- });
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- if (point.length == 3) {
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- let a = this.ctaCalc(point[0].x, point[0].y, point[0].r, point[1].x, point[1].y, point[1].r, point[2].x, point[2].y, point[2].r);
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- a[0].color = this.lineColor;
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- this.bethelDraw(a, 1);
|
|
|
- point = [{
|
|
|
- x: x,
|
|
|
- y: y,
|
|
|
- r: r
|
|
|
- }];
|
|
|
- }
|
|
|
- }
|
|
|
- }
|
|
|
- //求两点之间距离
|
|
|
- distance(a, b, type) {
|
|
|
- let x = b.x - a.x;
|
|
|
- let y = b.y - a.y;
|
|
|
- return Math.sqrt(x * x + y * y) * 5;
|
|
|
- }
|
|
|
- ctaCalc(x0, y0, r0, x1, y1, r1, x2, y2, r2) {
|
|
|
- let a = [],
|
|
|
- vx01, vy01, norm, n_x0, n_y0, vx21, vy21, n_x2, n_y2;
|
|
|
- vx01 = x1 - x0;
|
|
|
- vy01 = y1 - y0;
|
|
|
- norm = Math.sqrt(vx01 * vx01 + vy01 * vy01 + 0.0001) * 2;
|
|
|
- vx01 = vx01 / norm * r0;
|
|
|
- vy01 = vy01 / norm * r0;
|
|
|
- n_x0 = vy01;
|
|
|
- n_y0 = -vx01;
|
|
|
- vx21 = x1 - x2;
|
|
|
- vy21 = y1 - y2;
|
|
|
- norm = Math.sqrt(vx21 * vx21 + vy21 * vy21 + 0.0001) * 2;
|
|
|
- vx21 = vx21 / norm * r2;
|
|
|
- vy21 = vy21 / norm * r2;
|
|
|
- n_x2 = -vy21;
|
|
|
- n_y2 = vx21;
|
|
|
- a.push({
|
|
|
- mx: x0 + n_x0,
|
|
|
- my: y0 + n_y0,
|
|
|
- color: "#1A1A1A"
|
|
|
- });
|
|
|
- a.push({
|
|
|
- c1x: x1 + n_x0,
|
|
|
- c1y: y1 + n_y0,
|
|
|
- c2x: x1 + n_x2,
|
|
|
- c2y: y1 + n_y2,
|
|
|
- ex: x2 + n_x2,
|
|
|
- ey: y2 + n_y2
|
|
|
- });
|
|
|
- a.push({
|
|
|
- c1x: x2 + n_x2 - vx21,
|
|
|
- c1y: y2 + n_y2 - vy21,
|
|
|
- c2x: x2 - n_x2 - vx21,
|
|
|
- c2y: y2 - n_y2 - vy21,
|
|
|
- ex: x2 - n_x2,
|
|
|
- ey: y2 - n_y2
|
|
|
- });
|
|
|
- a.push({
|
|
|
- c1x: x1 - n_x2,
|
|
|
- c1y: y1 - n_y2,
|
|
|
- c2x: x1 - n_x0,
|
|
|
- c2y: y1 - n_y0,
|
|
|
- ex: x0 - n_x0,
|
|
|
- ey: y0 - n_y0
|
|
|
- });
|
|
|
- a.push({
|
|
|
- c1x: x0 - n_x0 - vx01,
|
|
|
- c1y: y0 - n_y0 - vy01,
|
|
|
- c2x: x0 + n_x0 - vx01,
|
|
|
- c2y: y0 + n_y0 - vy01,
|
|
|
- ex: x0 + n_x0,
|
|
|
- ey: y0 + n_y0
|
|
|
- });
|
|
|
- a[0].mx = a[0].mx.toFixed(1);
|
|
|
- a[0].mx = parseFloat(a[0].mx);
|
|
|
- a[0].my = a[0].my.toFixed(1);
|
|
|
- a[0].my = parseFloat(a[0].my);
|
|
|
- for (let i = 1; i < a.length; i++) {
|
|
|
- a[i].c1x = a[i].c1x.toFixed(1);
|
|
|
- a[i].c1x = parseFloat(a[i].c1x);
|
|
|
- a[i].c1y = a[i].c1y.toFixed(1);
|
|
|
- a[i].c1y = parseFloat(a[i].c1y);
|
|
|
- a[i].c2x = a[i].c2x.toFixed(1);
|
|
|
- a[i].c2x = parseFloat(a[i].c2x);
|
|
|
- a[i].c2y = a[i].c2y.toFixed(1);
|
|
|
- a[i].c2y = parseFloat(a[i].c2y);
|
|
|
- a[i].ex = a[i].ex.toFixed(1);
|
|
|
- a[i].ex = parseFloat(a[i].ex);
|
|
|
- a[i].ey = a[i].ey.toFixed(1);
|
|
|
- a[i].ey = parseFloat(a[i].ey);
|
|
|
- }
|
|
|
- return a;
|
|
|
- }
|
|
|
- bethelDraw(point, is_fill, color) {
|
|
|
- this.ctx.beginPath();
|
|
|
- this.ctx.moveTo(point[0].mx, point[0].my);
|
|
|
- if (undefined != color) {
|
|
|
- this.ctx.setFillStyle(color);
|
|
|
- this.ctx.setStrokeStyle(color);
|
|
|
- } else {
|
|
|
- this.ctx.setFillStyle(point[0].color);
|
|
|
- this.ctx.setStrokeStyle(point[0].color);
|
|
|
- }
|
|
|
- for (let i = 1; i < point.length; i++) {
|
|
|
- this.ctx.bezierCurveTo(point[i].c1x, point[i].c1y, point[i].c2x, point[i].c2y, point[i].ex, point[i].ey);
|
|
|
- }
|
|
|
- this.ctx.stroke();
|
|
|
- if (undefined != is_fill) {
|
|
|
- this.ctx.fill(); //填充图形 ( 后绘制的图形会覆盖前面的图形, 绘制时注意先后顺序 )
|
|
|
- }
|
|
|
- this.ctx.draw(true)
|
|
|
- }
|
|
|
+ //画两点之间的线条;参数为:line,会绘制最近的开始的两个点;
|
|
|
+ pointToLine(line) {
|
|
|
+ this.calcBethelLine(line);
|
|
|
+ // this.calcBethelLine1(line);
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ //计算插值的方式;
|
|
|
+ calcBethelLine(line) {
|
|
|
+ if (line.length <= 1) {
|
|
|
+ line[0].r = this.radius;
|
|
|
+ return;
|
|
|
+ }
|
|
|
+ let x0, x1, x2, y0, y1, y2, r0, r1, r2, len, lastRadius, dis = 0,
|
|
|
+ time = 0,
|
|
|
+ curveValue = 0.5;
|
|
|
+ if (line.length <= 2) {
|
|
|
+ x0 = line[1].x
|
|
|
+ y0 = line[1].y
|
|
|
+ x2 = line[1].x + (line[0].x - line[1].x) * curveValue;
|
|
|
+ y2 = line[1].y + (line[0].y - line[1].y) * curveValue;
|
|
|
+ //x2 = line[1].x;
|
|
|
+ //y2 = line[1].y;
|
|
|
+ x1 = x0 + (x2 - x0) * curveValue;
|
|
|
+ y1 = y0 + (y2 - y0) * curveValue;;
|
|
|
|
|
|
- selectColorEvent(lineColor) {
|
|
|
- this.lineColor = lineColor;
|
|
|
- }
|
|
|
+ } else {
|
|
|
+ x0 = line[2].x + (line[1].x - line[2].x) * curveValue;
|
|
|
+ y0 = line[2].y + (line[1].y - line[2].y) * curveValue;
|
|
|
+ x1 = line[1].x;
|
|
|
+ y1 = line[1].y;
|
|
|
+ x2 = x1 + (line[0].x - x1) * curveValue;
|
|
|
+ y2 = y1 + (line[0].y - y1) * curveValue;
|
|
|
+ }
|
|
|
+ //从计算公式看,三个点分别是(x0,y0),(x1,y1),(x2,y2) ;(x1,y1)这个是控制点,控制点不会落在曲线上;实际上,这个点还会手写获取的实际点,却落在曲线上
|
|
|
+ len = this.distance({
|
|
|
+ x: x2,
|
|
|
+ y: y2
|
|
|
+ }, {
|
|
|
+ x: x0,
|
|
|
+ y: y0
|
|
|
+ }, 'calc');
|
|
|
+ lastRadius = this.radius;
|
|
|
+ for (let n = 0; n < line.length - 1; n++) {
|
|
|
+ dis += line[n].dis;
|
|
|
+ time += line[n].time - line[n + 1].time;
|
|
|
+ if (dis > this.smoothness) break;
|
|
|
+ }
|
|
|
+ this.radius = Math.min(time / len * this.pressure + this.lineMin, this.lineMax) * this.lineSize
|
|
|
+ line[0].r = this.radius;
|
|
|
+ //计算笔迹半径;
|
|
|
+ if (line.length <= 2) {
|
|
|
+ r0 = (lastRadius + this.radius) / 2;
|
|
|
+ r1 = r0;
|
|
|
+ r2 = r1;
|
|
|
+ //return;
|
|
|
+ } else {
|
|
|
+ r0 = (line[2].r + line[1].r) / 2;
|
|
|
+ r1 = line[1].r;
|
|
|
+ r2 = (line[1].r + line[0].r) / 2;
|
|
|
+ }
|
|
|
+ let n = 5;
|
|
|
+ let point = [];
|
|
|
+ for (let i = 0; i < n; i++) {
|
|
|
+ let t = i / (n - 1);
|
|
|
+ let x = (1 - t) * (1 - t) * x0 + 2 * t * (1 - t) * x1 + t * t * x2;
|
|
|
+ let y = (1 - t) * (1 - t) * y0 + 2 * t * (1 - t) * y1 + t * t * y2;
|
|
|
+ let r = lastRadius + (this.radius - lastRadius) / n * i;
|
|
|
+ point.push({
|
|
|
+ x: x,
|
|
|
+ y: y,
|
|
|
+ r: r
|
|
|
+ });
|
|
|
+ if (point.length == 3) {
|
|
|
+ let a = this.ctaCalc(point[0].x, point[0].y, point[0].r, point[1].x, point[1].y, point[1].r, point[2].x, point[2].y,
|
|
|
+ point[2].r);
|
|
|
+ a[0].color = this.lineColor;
|
|
|
+ this.bethelDraw(a, 1);
|
|
|
+ point = [{
|
|
|
+ x: x,
|
|
|
+ y: y,
|
|
|
+ r: r
|
|
|
+ }];
|
|
|
+ }
|
|
|
+ }
|
|
|
+ }
|
|
|
+ //求两点之间距离
|
|
|
+ distance(a, b, type) {
|
|
|
+ let x = b.x - a.x;
|
|
|
+ let y = b.y - a.y;
|
|
|
+ return Math.sqrt(x * x + y * y) * 5;
|
|
|
+ }
|
|
|
+ ctaCalc(x0, y0, r0, x1, y1, r1, x2, y2, r2) {
|
|
|
+ let a = [],
|
|
|
+ vx01, vy01, norm, n_x0, n_y0, vx21, vy21, n_x2, n_y2;
|
|
|
+ vx01 = x1 - x0;
|
|
|
+ vy01 = y1 - y0;
|
|
|
+ norm = Math.sqrt(vx01 * vx01 + vy01 * vy01 + 0.0001) * 2;
|
|
|
+ vx01 = vx01 / norm * r0;
|
|
|
+ vy01 = vy01 / norm * r0;
|
|
|
+ n_x0 = vy01;
|
|
|
+ n_y0 = -vx01;
|
|
|
+ vx21 = x1 - x2;
|
|
|
+ vy21 = y1 - y2;
|
|
|
+ norm = Math.sqrt(vx21 * vx21 + vy21 * vy21 + 0.0001) * 2;
|
|
|
+ vx21 = vx21 / norm * r2;
|
|
|
+ vy21 = vy21 / norm * r2;
|
|
|
+ n_x2 = -vy21;
|
|
|
+ n_y2 = vx21;
|
|
|
+ a.push({
|
|
|
+ mx: x0 + n_x0,
|
|
|
+ my: y0 + n_y0,
|
|
|
+ color: "#1A1A1A"
|
|
|
+ });
|
|
|
+ a.push({
|
|
|
+ c1x: x1 + n_x0,
|
|
|
+ c1y: y1 + n_y0,
|
|
|
+ c2x: x1 + n_x2,
|
|
|
+ c2y: y1 + n_y2,
|
|
|
+ ex: x2 + n_x2,
|
|
|
+ ey: y2 + n_y2
|
|
|
+ });
|
|
|
+ a.push({
|
|
|
+ c1x: x2 + n_x2 - vx21,
|
|
|
+ c1y: y2 + n_y2 - vy21,
|
|
|
+ c2x: x2 - n_x2 - vx21,
|
|
|
+ c2y: y2 - n_y2 - vy21,
|
|
|
+ ex: x2 - n_x2,
|
|
|
+ ey: y2 - n_y2
|
|
|
+ });
|
|
|
+ a.push({
|
|
|
+ c1x: x1 - n_x2,
|
|
|
+ c1y: y1 - n_y2,
|
|
|
+ c2x: x1 - n_x0,
|
|
|
+ c2y: y1 - n_y0,
|
|
|
+ ex: x0 - n_x0,
|
|
|
+ ey: y0 - n_y0
|
|
|
+ });
|
|
|
+ a.push({
|
|
|
+ c1x: x0 - n_x0 - vx01,
|
|
|
+ c1y: y0 - n_y0 - vy01,
|
|
|
+ c2x: x0 + n_x0 - vx01,
|
|
|
+ c2y: y0 + n_y0 - vy01,
|
|
|
+ ex: x0 + n_x0,
|
|
|
+ ey: y0 + n_y0
|
|
|
+ });
|
|
|
+ a[0].mx = a[0].mx.toFixed(1);
|
|
|
+ a[0].mx = parseFloat(a[0].mx);
|
|
|
+ a[0].my = a[0].my.toFixed(1);
|
|
|
+ a[0].my = parseFloat(a[0].my);
|
|
|
+ for (let i = 1; i < a.length; i++) {
|
|
|
+ a[i].c1x = a[i].c1x.toFixed(1);
|
|
|
+ a[i].c1x = parseFloat(a[i].c1x);
|
|
|
+ a[i].c1y = a[i].c1y.toFixed(1);
|
|
|
+ a[i].c1y = parseFloat(a[i].c1y);
|
|
|
+ a[i].c2x = a[i].c2x.toFixed(1);
|
|
|
+ a[i].c2x = parseFloat(a[i].c2x);
|
|
|
+ a[i].c2y = a[i].c2y.toFixed(1);
|
|
|
+ a[i].c2y = parseFloat(a[i].c2y);
|
|
|
+ a[i].ex = a[i].ex.toFixed(1);
|
|
|
+ a[i].ex = parseFloat(a[i].ex);
|
|
|
+ a[i].ey = a[i].ey.toFixed(1);
|
|
|
+ a[i].ey = parseFloat(a[i].ey);
|
|
|
+ }
|
|
|
+ return a;
|
|
|
+ }
|
|
|
+ bethelDraw(point, is_fill, color) {
|
|
|
+ this.ctx.beginPath();
|
|
|
+ this.ctx.moveTo(point[0].mx, point[0].my);
|
|
|
+ if (undefined != color) {
|
|
|
+ this.ctx.setFillStyle(color);
|
|
|
+ this.ctx.setStrokeStyle(color);
|
|
|
+ } else {
|
|
|
+ this.ctx.setFillStyle(point[0].color);
|
|
|
+ this.ctx.setStrokeStyle(point[0].color);
|
|
|
+ }
|
|
|
+ for (let i = 1; i < point.length; i++) {
|
|
|
+ this.ctx.bezierCurveTo(point[i].c1x, point[i].c1y, point[i].c2x, point[i].c2y, point[i].ex, point[i].ey);
|
|
|
+ }
|
|
|
+ this.ctx.stroke();
|
|
|
+ if (undefined != is_fill) {
|
|
|
+ this.ctx.fill(); //填充图形 ( 后绘制的图形会覆盖前面的图形, 绘制时注意先后顺序 )
|
|
|
+ }
|
|
|
+ this.ctx.draw(true)
|
|
|
+ }
|
|
|
|
|
|
- selectSlideValue(slideValue) {
|
|
|
- switch (slideValue) {
|
|
|
- case 0:
|
|
|
- this.lineSize = 0.1;
|
|
|
- this.lineMin = 0.1;
|
|
|
- this.lineMax = 0.1;
|
|
|
- break;
|
|
|
- case 25:
|
|
|
- this.lineSize = 1;
|
|
|
- this.lineMin = 0.5;
|
|
|
- this.lineMax = 2;
|
|
|
- break;
|
|
|
- case 50:
|
|
|
- this.lineSize = 1.5;
|
|
|
- this.lineMin = 1;
|
|
|
- this.lineMax = 3;
|
|
|
- break;
|
|
|
- case 75:
|
|
|
- this.lineSize = 1.5;
|
|
|
- this.lineMin = 2;
|
|
|
- this.lineMax = 3.5;
|
|
|
- break;
|
|
|
- case 100:
|
|
|
- this.lineSize = 3;
|
|
|
- this.lineMin = 2;
|
|
|
- this.lineMax = 3.5;
|
|
|
- break;
|
|
|
- }
|
|
|
- }
|
|
|
-
|
|
|
- saveCanvas(){
|
|
|
- return new Promise((resolve,rej) => {
|
|
|
+ selectColorEvent(lineColor) {
|
|
|
+ this.lineColor = lineColor;
|
|
|
+ }
|
|
|
+
|
|
|
+ selectSlideValue(slideValue) {
|
|
|
+ switch (slideValue) {
|
|
|
+ case 0:
|
|
|
+ this.lineSize = 0.1;
|
|
|
+ this.lineMin = 0.1;
|
|
|
+ this.lineMax = 0.1;
|
|
|
+ break;
|
|
|
+ case 25:
|
|
|
+ this.lineSize = 1;
|
|
|
+ this.lineMin = 0.5;
|
|
|
+ this.lineMax = 2;
|
|
|
+ break;
|
|
|
+ case 50:
|
|
|
+ this.lineSize = 1.5;
|
|
|
+ this.lineMin = 1;
|
|
|
+ this.lineMax = 3;
|
|
|
+ break;
|
|
|
+ case 75:
|
|
|
+ this.lineSize = 1.5;
|
|
|
+ this.lineMin = 2;
|
|
|
+ this.lineMax = 3.5;
|
|
|
+ break;
|
|
|
+ case 100:
|
|
|
+ this.lineSize = 3;
|
|
|
+ this.lineMin = 2;
|
|
|
+ this.lineMax = 3.5;
|
|
|
+ break;
|
|
|
+ }
|
|
|
+ }
|
|
|
+
|
|
|
+ saveCanvas() {
|
|
|
+ return new Promise((resolve, rej) => {
|
|
|
uni.canvasToTempFilePath({
|
|
|
canvasId: this.canvasName,
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|
|
success: function(res) {
|
|
|
- console.log(res, res.tempFilePath)
|
|
|
+ // console.log(res, res.tempFilePath)
|
|
|
resolve(res.tempFilePath);
|
|
|
},
|
|
|
- fail:function(err){
|
|
|
- console.log('图片生成失败:'+err)
|
|
|
- rej(err);
|
|
|
- }
|
|
|
+ fail: function(err) {
|
|
|
+ console.log('图片生成失败:' + err)
|
|
|
+ rej(err);
|
|
|
+ }
|
|
|
})
|
|
|
- })
|
|
|
- }
|
|
|
+ })
|
|
|
+ }
|
|
|
}
|
|
|
|
|
|
-export default Handwriting;
|
|
|
+export default Handwriting;
|