Fabric.js qrDecompose() 方法

qrDecompose() 方法用于将指定的标准 2×3 矩阵分解为变换分量

句法：

qrDecompose( mat )

参数：此方法接受上面提到的参数，如下所述：

• mat：此参数保存指定的变换矩阵数组。

返回值：此方法返回变换的组件。

示例 1：

Javascript

  

    
    
    

  

    
  
        // Calling qrDecompose() function over
        // the specified array of transform matrix
        console.log(fabric.util
            .qrDecompose([1, 2, 3, 4, 5, 6]));
    

  

输出：

{"angle":63.434948822922,"scaleX":2.23606797749979,"scaleY":-0.8944271909999159,
"skewX":65.55604521958347,"skewY":0,"translateX":5,"translateY":6}

示例 2：

Javascript

  

  
    
    
    

  

    
  
        // Specifying some array of transform matrix
        var a1 = [1, 2, 3];
        var a2 = [0, 6, 7, 8, 0, 0];
  
        // Calling qrDecompose() function over the
        // above specified array of transform matrix
        console.log(fabric.util.qrDecompose(a1));
        console.log(fabric.util.qrDecompose(a2));
    
  

  

输出：

{"angle":63.434948822922,"scaleX":2.23606797749979,"scaleY":null,"skewX":null,"skewY":0}
{"angle":90,"scaleX":6,"scaleY":-7,"skewX":53.13010235415598,"skewY":0,
"translateX":0,"translateY":0}