爲UML圖創建「sc」「紙效果的算法？

Question

我喜歡的http://yuml.me UML圖的邋遢紙效果，是有其優選不是在Ruby，但在PHP中的算法，Java或C＃，我想看看是否可以很容易地做同樣的事情在雷博爾：

http://reboltutorial.com/blog/easy-yuml-dialect-for-mere-mortals2/

Answer 1

效果結合

• 對角線漸變填充
• 陰影
• 線，而不是直的，有一些小的顯然是隨機的偏差，這給人一種「sc'」的感覺。

您可以使用輸入的哈希種子的隨機數生成器，所以你每次都得到相同的圖像。

這似乎爲潔膚達線工作確定：

public class ScruffyLines { 
    static final double WOBBLE_SIZE = 0.5; 
    static final double WOBBLE_INTERVAL = 16.0; 

    Random random; 

    ScruffyLines (long seed) { 
     random = new Random(seed); 
    } 


    public Point2D.Double[] scruffUpPolygon (Point2D.Double[] polygon) { 
     ArrayList<Point2D.Double> points = new ArrayList<Point2D.Double>(); 
     Point2D.Double    prev = polygon[0]; 

     points.add (prev); // no wobble on first point 

     for (int index = 1; index < polygon.length; ++index) { 
      final Point2D.Double point = polygon[index]; 
      final double   dist = prev.distance (point); 

      // interpolate between prev and current point if they are more 
      // than a certain distance apart, adding in extra points to make 
      // longer lines wobbly 
      if (dist > WOBBLE_INTERVAL) { 
       int stepCount = (int) Math.floor (dist/WOBBLE_INTERVAL); 
       double step = dist/stepCount; 

       double x = prev.x; 
       double y = prev.y; 
       double dx = (point.x - prev.x)/stepCount; 
       double dy = (point.y - prev.y)/stepCount; 

       for (int count = 1; count < stepCount; ++count) { 
        x += dx; 
        y += dy; 

        points.add (perturb (x, y)); 
       } 
      } 

      points.add (perturb (point.x, point.y)); 

      prev = point; 
     } 

     return points.toArray (new Point2D.Double[ points.size() ]); 
    } 

    Point2D.Double perturb (double x, double y) { 
     return new Point2D.Double ( 
      x + random.nextGaussian() * WOBBLE_SIZE, 
      y + random.nextGaussian() * WOBBLE_SIZE); 
    } 
} 

example scruffed up rectangle http://img34.imageshack.us/img34/4743/screenshotgh.png