如何使用Java Graphics2D绘制一组QuadCurves

我在绘图中有很多QuadCurve2D方法，但是当我填充它们时，它们实际上并没有填满整个图像。

填充和曲线代码：

g2.setStroke(new BasicStroke(5)); QuadCurve2D earLeft1 = new QuadCurve2D.Double(145, 155, 137.5, 49, 150, 49); g2.draw(earLeft1); QuadCurve2D earLeft2 = new QuadCurve2D.Double(150, 49, 156.25, 49, 200, 100); g2.draw(earLeft2); QuadCurve2D betweenEars = new QuadCurve2D.Double(200, 100, 237.5, 88, 262.5, 87.5); g2.draw(betweenEars); QuadCurve2D earRight1 = new QuadCurve2D.Double(262.5, 87.5, 287.5, 25, 300, 25); g2.draw(earRight1); QuadCurve2D earRight2 = new QuadCurve2D.Double(300, 25, 312.5, 25, 337.5, 137.5); g2.draw(earRight2); CubicCurve2D headPhoneLeft = new CubicCurve2D.Double(145, 155, 75, 175, 100, 250, 150, 250); g2.draw(headPhoneLeft); CubicCurve2D headPhoneRight = new CubicCurve2D.Double(337.5, 137.5, 387.5, 137.5, 393.75, 188, 362.5, 225); g2.draw(headPhoneRight); QuadCurve2D headbandTop1 = new QuadCurve2D.Double(109, 177, 150, 75, 225, 50); g2.draw(headbandTop1); QuadCurve2D headbandTop2 = new QuadCurve2D.Double(225, 50, 300, 50, 372, 150); g2.draw(headbandTop2); QuadCurve2D headbandBottom1 = new QuadCurve2D.Double(135, 155, 150, 112.5, 212.5, 78); g2.draw(headbandBottom1); QuadCurve2D headbandBottom2 = new QuadCurve2D.Double(212.5, 78, 306.25, 78, 351, 137.5); g2.draw(headbandBottom2); QuadCurve2D faceBottomLeft = new QuadCurve2D.Double(150, 250, 162.5, 275, 200, 300); g2.draw(faceBottomLeft); QuadCurve2D faceBottomRight = new QuadCurve2D.Double(362.5, 225, 363.5, 237.5, 350, 262.5); g2.draw(faceBottomRight); CubicCurve2D leftArm = new CubicCurve2D.Double(200, 300, 87.5, 300, 87.5, 375, 188.5, 362.5); g2.draw(leftArm); CubicCurve2D rightArm = new CubicCurve2D.Double(350, 262.5, 425, 237.5, 450, 300, 375, 325); g2.draw(rightArm); QuadCurve2D leftLegOuter = new QuadCurve2D.Double(188.5, 362.5, 154, 425, 200, 512.5); g2.draw(leftLegOuter); QuadCurve2D rightLegOuter = new QuadCurve2D.Double(375, 325, 388.5, 356.25, 387.5, 412.5); g2.draw(rightLegOuter); QuadCurve2D leftFootTop = new QuadCurve2D.Double(200, 512.5, 125, 500, 130, 562.5); g2.draw(leftFootTop); QuadCurve2D leftFootBottom = new QuadCurve2D.Double(130, 562.5, 175, 575, 262.5, 562.5); g2.draw(leftFootBottom); QuadCurve2D leftLegInner = new QuadCurve2D.Double(262.5, 562.5, 237.5, 400, 268.75, 363); g2.draw(leftLegInner); QuadCurve2D rightLegInner = new QuadCurve2D.Double(268.75, 363, 318.75, 362.5, 337.5, 475); g2.draw(rightLegInner); QuadCurve2D rightFootBottom = new QuadCurve2D.Double(337.5, 475, 400, 480, 455, 470); g2.draw(rightFootBottom); QuadCurve2D rightFootTop = new QuadCurve2D.Double(455, 470, 450, 400, 387.5, 412.5); g2.draw(rightFootTop); CubicCurve2D tailInner = new CubicCurve2D.Double(268.75, 363, 287.5, 450,125, 387.5, 62.5, 400); g2.draw(tailInner); //QuadCurve2D tailInner1 = new QuadCurve2D.Double(268.75, 363, 275, 387.5, 200, 400); //g2.draw(tailInner1); //QuadCurve2D tailInner2 = new QuadCurve2D.Double(200, 400, 125, 387.5, 62.5, 400); //g2.draw(tailInner2); QuadCurve2D tailOuter1 = new QuadCurve2D.Double(62.5, 400, 25, 425, 200, 437.5); g2.draw(tailOuter1); QuadCurve2D tailOuter2 = new QuadCurve2D.Double(200, 437.5, 287.5, 425, 300, 375); g2.draw(tailOuter2); int[] x = {175, 200, 225, 225, 287, 300, 309, 337, 325, 309, 302, 292, 240, 227, 226, 215}; int[] y = {225, 210, 237, 200, 187, 212, 187, 187, 262, 262, 230, 268, 275, 250, 277, 281}; GeneralPath mouthAndTeeth = new GeneralPath(); mouthAndTeeth.moveTo(x[0], y[0]); for (int index = 1; index < x.length; index++) { mouthAndTeeth.lineTo(x[index], y[index]); }; mouthAndTeeth.closePath(); g2.draw(mouthAndTeeth); /* g2.fill(earLeft1); g2.fill(earLeft2); g2.fill(earRight1); g2.fill(earRight2); g2.fill(betweenEars); g2.fill(headbandBottom1); g2.fill(headbandBottom2); g2.fill(headbandTop1); g2.fill(headbandTop2); g2.fill(headPhoneLeft); g2.fill(headPhoneRight); g2.fill(faceBottomLeft); g2.fill(faceBottomRight); g2.fill(leftArm); g2.fill(rightArm); g2.fill(leftFootBottom); g2.fill(leftFootTop); g2.fill(rightFootBottom); g2.fill(rightFootTop); g2.fill(leftLegInner); g2.fill(leftLegOuter); g2.fill(rightLegInner); g2.fill(rightLegOuter); //g2.fill(tailInner1); //g2.fill(tailInner2); g2.fill(tailOuter1); g2.fill(tailOuter2); */ 

这是我唯一的解决方案，但它没有这样做。 建议？

Answer 1

“A”解决方案可能是将“形状”绘制到BufferedImage并简单地缩放图像，但这也会缩放笔划/线条大小。

更好的解决方案可能是将绘图封装到Shape然后使用Shape#createTransformedShape 。

 public class Cat extends Path2D.Double { public Cat() { //Left Ear moveTo(145, 155); curveTo(145, 155, 137.5, 49, 150, 49); moveTo(150, 49); curveTo(150, 49, 156.25, 49, 200, 100); // Between Ears moveTo(200, 100); curveTo(200, 100, 237.5, 88, 262.5, 87.5); // Right ear moveTo(262.5, 87.5); curveTo(262.5, 87.5, 287.5, 25, 300, 25); moveTo(300, 25); curveTo(300, 25, 312.5, 25, 337.5, 137.5); // Head phone left moveTo(300, 25); append(new CubicCurve2D.Double(145, 155, 75, 175, 100, 250, 150, 250), false); moveTo(337.5, 137.5); append(new CubicCurve2D.Double(337.5, 137.5, 387.5, 137.5, 393.75, 188, 362.5, 225), false); moveTo(109, 177); curveTo(109, 177, 150, 75, 225, 50); moveTo(225, 50); curveTo(225, 50, 300, 50, 372, 150); moveTo(135, 155); curveTo(135, 155, 150, 112.5, 212.5, 78); moveTo(212.5, 78); curveTo(212.5, 78, 306.25, 78, 351, 137.5); moveTo(150, 250); curveTo(150, 250, 162.5, 275, 200, 300); moveTo(362.5, 225); curveTo(362.5, 225, 363.5, 237.5, 350, 262.5); moveTo(200, 300); append(new CubicCurve2D.Double(200, 300, 87.5, 300, 87.5, 375, 188.5, 362.5), false); moveTo(350, 262.5); append(new CubicCurve2D.Double(350, 262.5, 425, 237.5, 450, 300, 375, 325), false); moveTo(188.5, 362.5); curveTo(188.5, 362.5, 154, 425, 200, 512.5); moveTo(375, 325); curveTo(375, 325, 388.5, 356.25, 387.5, 412.5); moveTo(200, 512.5); curveTo(200, 512.5, 125, 500, 130, 562.5); moveTo(130, 562.5); curveTo(130, 562.5, 175, 575, 262.5, 562.5); moveTo(262.5, 562.5); curveTo(262.5, 562.5, 237.5, 400, 268.75, 363); moveTo(268.75, 363); curveTo(268.75, 363, 318.75, 362.5, 337.5, 475); moveTo(337.5, 475); curveTo(337.5, 475, 400, 480, 455, 470); moveTo(455, 470); curveTo(455, 470, 450, 400, 387.5, 412.5); moveTo(268.75, 363); append(new CubicCurve2D.Double(268.75, 363, 287.5, 450, 125, 387.5, 62.5, 400), false); moveTo(62.5, 400); curveTo(62.5, 400, 25, 425, 200, 437.5); moveTo(200, 437.5); curveTo(200, 437.5, 287.5, 425, 300, 375); int[] x = {175, 200, 225, 225, 287, 300, 309, 337, 325, 309, 302, 292, 240, 227, 226, 215}; int[] y = {225, 210, 237, 200, 187, 212, 187, 187, 262, 262, 230, 268, 275, 250, 277, 281}; GeneralPath mouthAndTeeth = new GeneralPath(); mouthAndTeeth.moveTo(x[0], y[0]); for (int index = 1; index < x.length; index++) { mouthAndTeeth.lineTo(x[index], y[index]); } mouthAndTeeth.closePath(); append(mouthAndTeeth, false); } } 

然后根据容器的可用空间缩放形状...

 import java.awt.BasicStroke; import java.awt.Dimension; import java.awt.EventQueue; import java.awt.Graphics; import java.awt.Graphics2D; import java.awt.Shape; import java.awt.geom.AffineTransform; import java.awt.geom.CubicCurve2D; import java.awt.geom.GeneralPath; import java.awt.geom.Path2D; import javax.swing.JFrame; import javax.swing.JPanel; import javax.swing.UIManager; import javax.swing.UnsupportedLookAndFeelException; public class Test { public static void main(String[] args) { new Test(); } public Test() { EventQueue.invokeLater(new Runnable() { @Override public void run() { try { UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) { ex.printStackTrace(); } JFrame frame = new JFrame("Testing"); frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); frame.add(new TestPane()); frame.pack(); frame.setLocationRelativeTo(null); frame.setVisible(true); } }); } public class TestPane extends JPanel { private Cat cat; public TestPane() { cat = new Cat(); } @Override public Dimension getPreferredSize() { return new Dimension(200, 200); } protected void paintComponent(Graphics g) { super.paintComponent(g); Graphics2D g2d = (Graphics2D) g.create(); g2d.setStroke(new BasicStroke(5)); int catWidth = cat.getBounds().x + cat.getBounds().width; int catHeight = cat.getBounds().y + cat.getBounds().height; int width = getWidth() - 1; int height = getHeight() - 1; double scaleWidth = width / (double)catWidth; double scaleHeight = height / (double)catHeight; double scale = Math.min(scaleHeight, scaleWidth); AffineTransform at = AffineTransform.getScaleInstance(scale, scale); Shape shape = cat.createTransformedShape(at); g2d.draw(shape); g2d.dispose(); } } } 

您使用的将满足需求，例如，使用这样的Shape ，将不允许您以不同的方式为各个部分着色