Question

我正在构建一个应用程序，用户可以无限次地操作svg对象（例如图像），即旋转和缩放它们。我使用 Raphael.js 来处理SVG。

如何在应用新转换之前将对象“重置”为其初始状态，以便新转换不会与之前的转换重叠？

Bellow是一个测试（这里有一个工作小提琴： jsfiddle.net/5TsW6/3/ ）我在第一个应用SAME转换之前尝试重置第二个视口中的对象一，但我的尝试没有效果，因为两个视口中的结果是不同的，当它应该是相同的时候：

<div id="wrapper1" style="width:250px; height:250px; outline:1px solid invert; float:left; margin-right:5px;"></div>
<div id="wrapper2" style="width:250px; height:250px; outline:1px solid invert; float:left;"></div>

脚本：

var img_width=100, img_height=75,
    canvas1, canvas2,
    image1, image2,
    w1, w2, // contours
    x,y,    // attributes "x" and "y"
    rx,ry;  // coordinates for the rotation pivot

// Create the canvases
canvas1 = new Raphael(document.getElementById("wrapper1"), 250, 250);  
canvas2 = new Raphael(document.getElementById("wrapper2"), 250, 250);


// Add the images to the canvases    
image1 = canvas1.image("http://picselbocs.com/projects/cakemyface/image-gallery/intermediate/3295094303_2b50e5fe03_z.jpg",0,0,img_width,img_height);
image2 = canvas2.image("http://picselbocs.com/projects/cakemyface/image-gallery/intermediate/3295094303_2b50e5fe03_z.jpg",0,0,img_width,img_height);


// Modify (x,y) 
x = 40;
y = 80;
image1.attr({"x":x,"y":y});
image2.attr({"x":x,"y":y});


// Add the objects' contours
canvas1.rect(x,y,img_width,img_height).attr({"stroke-width":"1px","stroke":"#00F"});
canvas2.rect(x,y,img_width,img_height).attr({"stroke-width":"1px","stroke":"#00F"});

// Compute the rotation pivot coordinates (the pivot should coincide with the object's center)
var scaling = 1.2;
rx = (x + img_width / 2) * scaling;
ry = (y + img_height / 2) * scaling;

// Apply transformations
image1.transform("S"+scaling+","+scaling+",0,0R45,"+rx+","+ry);
image2.transform("S"+scaling+","+scaling+",0,0R45,"+rx+","+ry);



// ----- Here starts second transformation ------ //
image2.transform("").transform("S"+scaling+","+scaling+",0,0r45,"+rx+","+ry);   // I've attempted to reset the transform string, but with no effect

Answer 1

重置正常。您在第二次转换中使用r45而不是R45输入了拼写错误，意思是“在应用之前将先前的转换考虑在内”，因此存在差异。

如何重置SVG转换（即将SVG对象返回到其原始状态）？

1 个答案: