如何在java中绘制菱形? [英] How to draw a diamond shape in java?

问题描述

所以我必须画一个菱形.不是静态钻石，而是我自己拖动和绘制的钻石.我已经使用 General Path 来完成它，但它绘制的钻石不直；菱形向左弯曲，它没有被吸引到我的鼠标指向的地方.

So i have to draw a diamond shape. Not a Static diamond but a diamond that i will myself drag and draw. I've used General Path to do it but it is drawing a diamond that is not straight; the diamond is bend to the left and it's not being drawn to where my mouse is pointed.

这是我创建菱形的代码.有人可以帮我解决这个问题吗?

Here is my code to create the diamond shape. Can someone please help me solve this?

 private GeneralPath drawDiamond(int x1, int y1, int x2, int y2){
            
            int x = Math.min(x1, x2);
            int y = Math.min(y1, y2);

            // Gets the difference between the coordinates and

            int width = Math.abs(x1 - x2);
            int height = Math.abs(y1 - y2);
            
            Rectangle2D.Double diamond = new Rectangle2D.Double(x1,y1,width,height);
            
            GeneralPath connectedDiamond = new GeneralPath(GeneralPath.WIND_EVEN_ODD);
            
            connectedDiamond.append(diamond, true);
            
            AffineTransform at = new AffineTransform();
            at.rotate(Math.toRadians(20));
            connectedDiamond.transform(at);
            
            return connectedDiamond;
        }

这是我的绘画方法:

public void paint(Graphics g) {           

            graphSettings = (Graphics2D) g;           

            graphSettings.setRenderingHint(RenderingHints.KEY_ANTIALIASING,
                    RenderingHints.VALUE_ANTIALIAS_ON);

            graphSettings.setStroke(new BasicStroke(4));
           
            Iterator<Color> strokeCounter = shapeStroke.iterator();
            for (NamedShape s : shapes) {

                graphSettings.draw(s.getShape());

            }

            if (drawStart != null && drawEnd != null) {
                
                graphSettings.setComposite(AlphaComposite.getInstance(
                        AlphaComposite.SRC_OVER, 0.40f));

                graphSettings.setPaint(Color.LIGHT_GRAY);

                Shape aShape = null;
                    
                if(currentAction == 7){
                    
                    aShape = drawDiamond(drawStart.x, drawStart.y, drawEnd.x, drawEnd.y);
                }

                graphSettings.draw(aShape);
            }
        }

有人可以帮我做这件事吗?

Can someone please help me to do this?

推荐答案

如何代替旋转矩形，而是在矩形内的 4 个点之间画线:

How about instead of rotating a rectangle, you draw lines between 4 points inside a rectangle:

要点:

请原谅我糟糕的 mspaint 技能.

excuse my poor mspaint skills.

但我希望你明白我的意思.你取顶部中心，中间右侧，底部中心和中间左侧的点并在它们之间画线(使用generalPath，我认为)

but i hope u get what i mean. u take the top center, middle right, bottom center and middle left points and draw lines between those (using generalPath, i think)

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