如何使用Java Graphics2D绘制一组QuadCurves

本文介绍了如何使用Java Graphics2D绘制一组QuadCurves的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述 29岁程序员，3月因学历无情被辞！ 我在绘图中有很多QuadCurve2D方法，但是当我填充它们时，它们实际上并不填充整个图像。 填充和曲线代码： g2.setStroke（new BasicStroke（5））; QuadCurve2D earLeft1 =新的QuadCurve2D.Double（145,155,137.5,49,150,49）; g2.draw（earLeft1）; QuadCurve2D earLeft2 =新的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 =新的QuadCurve2D.Double（262.5,87.5,287.5,25,300,25）; g2.draw（earRight1）; QuadCurve2D earRight2 =新的QuadCurve2D.Double（300，25，312.5，25，337.5，137.5）; g2.draw（earRight2）; CubicCurve2D headPhoneLeft =新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 =新的QuadCurve2D.Double（109，177，150，75，225，50）; g2.draw（headbandTop1）; QuadCurve2D headbandTop2 =新QuadCurve2D.Double（225，50，300，50，372，150）; g2.draw（headbandTop2）; QuadCurve2D headbandBottom1 =新的QuadCurve2D.Double（135,155,150,112.5,212.5,78）; g2.draw（headbandBottom1）; QuadCurve2D headbandBottom2 =新的QuadCurve2D.Double（212.5，78，306.25，78，351，137.5）; g2.draw（headbandBottom2）; QuadCurve2D faceBottomLeft =新的QuadCurve2D.Double（150,250,162.5,275,200,300）; g2.draw（faceBottomLeft）; QuadCurve2D faceBottomRight =新的QuadCurve2D.Double（362.5,225,363.5,237.5,350,262.5）; g2.draw（faceBottomRight）; CubicCurve2D leftArm =新的CubicCurve2D.Double（200,300,87.5,300,87.5,375,188.5,362.5）; g2.draw（leftArm）; CubicCurve2D rightArm =新的CubicCurve2D.Double（350,262.5,425,237.5,450,300,375,325）; g2.draw（rightArm）; QuadCurve2D leftLegOuter =新的QuadCurve2D.Double（188.5，362.5，154，425，200，512.5）; g2.draw（leftLegOuter）; QuadCurve2D rightLegOuter =新的QuadCurve2D.Double（375,325,388.5,356.25,387.5,412.5）; g2.draw（rightLegOuter）; QuadCurve2D leftFootTop =新的QuadCurve2D.Double（200,512.5,125,500,130,562.5）; g2.draw（leftFootTop）; QuadCurve2D leftFootBottom =新的QuadCurve2D.Double（130，562.5，175，575，262.5，562.5）; g2.draw（leftFootBottom）; QuadCurve2D leftLegInner =新的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 =新QuadCurve2D.Double（337.5，475，400，480，455，470）; g2.draw（rightFootBottom）; QuadCurve2D rightFootTop =新的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 =新的QuadCurve2D.Double（268.75，363，275，387.5，200，400）; //g2.draw(tailInner1）; // QuadCurve2D tailInner2 =新的QuadCurve2D.Double（200,400,125,387.5,62.5,400）; //g2.draw(tailInner2）; QuadCurve2D tailOuter1 =新的QuadCurve2D.Double（62.5,400,25,425,200,437.5）; g2.draw（tailOuter1）; QuadCurve2D tailOuter2 =新的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};其中， int [] y = {225,210,237,200,187,212,187,187,262,262,230,268,275,250,277,281};其中， 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？解决方案A解决方案可能是将形状绘制到 BufferedImage 更好的解决方案可能是将图形封装到 Shape 并使用 Shape＃createTransformedShape 来代替。 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）; //在耳朵之间 moveTo（200，100）; curveTo（200，100，237.5，88，262.5，87.5）; //右耳 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）; //头电话左 moveTo（300，25）; append（新的CubicCurve2D.Double（145，155，75，175，100，250，150，250），false）; moveTo（337.5，137.5）; append（新的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（新的CubicCurve2D.Double（200,300,87.5,300,87.5,375,188.5,362.5），false）; moveTo（350，262.5）; append（新的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（新的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};其中， int [] y = {225,210,237,200,187,212,187,187,262,262,230,268,275,250,277,281};其中， 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... 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（）; $ b $ public Test（）{ EventQueue.invokeLater（new Runnable（）{ @Override public void run（）{尝试{ 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）; } 保护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 Shape 这样的内容，不会让您以不同的颜色对每个部分着色。 I have a lot of QuadCurve2D methods in a drawing, but when I fill them they don't actually fill the whole image.Code for fill and curves: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); */This has been my only solution but it's not doing it. Suggestions? 解决方案 "A" solution might be to paint the "shape" to a BufferedImage and simply scale the image, but this will scale the stroke/line size as well.A better solution might be to encapsulate the drawing into a Shape and use Shape#createTransformedShape instead.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); }}And then scale the shape based on the available space of the container...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(); } }}Which you use will come down to needs, for example, using a Shape like this, won't allow you to color individual sections differently 这篇关于如何使用Java Graphics2D绘制一组QuadCurves的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！ 上岸，阿里云！