Grafika Komputer : Mewarnai Objek - Java

Kali ini akan ada tutorial grafika komputer untuk color boundary atau memberikan warna pada objek yang dibuat.

Berikut adalah code-nya :

import java.awt.Color;
import java.awt.Point;
import java.awt.image.BufferedImage;
import java.util.Stack;
import javax.swing.ImageIcon;
import javax.swing.SwingUtilities;

public class DrawingPanel extends javax.swing.JFrame {

    BufferedImage img;

    public DrawingPanel() {
        initComponents();
        img = new BufferedImage(jLabel1.getWidth(), jLabel1.getHeight(), BufferedImage.TYPE_INT_RGB);
        jLabel1.setIcon(new ImageIcon(img));

    }

    public void colorRecursive(int x, int y, Color o, Color n) {
        
        if (img.getRGB(x, y) != n.getRGB() && img.getRGB(x, y) == o.getRGB()) {
            img.setRGB(x, y, n.getRGB());
            colorRecursive(x, y + 1, o, n);
            colorRecursive(x, y - 1, o, n);
            colorRecursive(x - 1, y, o, n);
            colorRecursive(x + 1, y, o, n);
        }
    }

    public void colorStack(int x, int y, Color o, Color n) {
        Stack stack = new Stack();
        stack.push(new Point(x, y));
        while (!stack.empty()) {
            Point point = stack.pop();
            int currentX = point.x;
            int currentY = point.y;

            int currentColor = img.getRGB(currentX, currentY);
            if (currentColor != n.getRGB() && currentColor == o.getRGB()) {
                img.setRGB(currentX, currentY, n.getRGB());

                stack.push(new Point(currentX + 1, currentY));
                stack.push(new Point(currentX - 1, currentY));
                stack.push(new Point(currentX, currentY + 1));
                stack.push(new Point(currentX, currentY - 1));
            }
        }
    }

    public void CirclePolar(int xc, int yc, int r) {
        double x, y;
        for (double i = 1.0 / r; i <= 2 * Math.PI; i += 1.0 / r) {
            y = yc + r * Math.sin(i);
            x = xc + r * Math.cos(i);
            img.setRGB((int) x, (int) y, Color.white.getRGB());
        }
    }

    /**
     * This method is called from within the constructor to initialize the form.
     * WARNING: Do NOT modify this code. The content of this method is always
     * regenerated by the Form Editor.
     */
    @SuppressWarnings("unchecked")
    //                           
    private void initComponents() {

        jLabel1 = new javax.swing.JLabel();

        setDefaultCloseOperation(javax.swing.WindowConstants.EXIT_ON_CLOSE);

        jLabel1.setBackground(new java.awt.Color(0, 0, 0));
        jLabel1.setForeground(new java.awt.Color(255, 255, 255));
        jLabel1.addMouseListener(new java.awt.event.MouseAdapter() {
            public void mouseClicked(java.awt.event.MouseEvent evt) {
                jLabel1MouseClicked(evt);
            }
        });

        javax.swing.GroupLayout layout = new javax.swing.GroupLayout(getContentPane());
        getContentPane().setLayout(layout);
        layout.setHorizontalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 400, Short.MAX_VALUE)
        );
        layout.setVerticalGroup(
            layout.createParallelGroup(javax.swing.GroupLayout.Alignment.LEADING)
            .addComponent(jLabel1, javax.swing.GroupLayout.DEFAULT_SIZE, 300, Short.MAX_VALUE)
        );

        pack();
    }//                         

    private void jLabel1MouseClicked(java.awt.event.MouseEvent evt) {                                     
        // TODO add your handling code here:
   
        if(SwingUtilities.isLeftMouseButton(evt)){
            CirclePolar(evt.getX(), evt.getY(), 50);
        }
         if(SwingUtilities.isRightMouseButton(evt)){
           colorRecursive(evt.getX(), evt.getY(),Color.black, Color.yellow);
        }
        jLabel1.setIcon(new ImageIcon(img));
    }                                    

    /**
     * @param args the command line arguments
     */
    public static void main(String args[]) {
        /* Set the Nimbus look and feel */
        //
        /* If Nimbus (introduced in Java SE 6) is not available, stay with the default look and feel.
         * For details see http://download.oracle.com/javase/tutorial/uiswing/lookandfeel/plaf.html 
         */
        try {
            for (javax.swing.UIManager.LookAndFeelInfo info : javax.swing.UIManager.getInstalledLookAndFeels()) {
                if ("Nimbus".equals(info.getName())) {
                    javax.swing.UIManager.setLookAndFeel(info.getClassName());
                    break;
                }
            }
        } catch (ClassNotFoundException ex) {
            java.util.logging.Logger.getLogger(DrawingPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (InstantiationException ex) {
            java.util.logging.Logger.getLogger(DrawingPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (IllegalAccessException ex) {
            java.util.logging.Logger.getLogger(DrawingPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        } catch (javax.swing.UnsupportedLookAndFeelException ex) {
            java.util.logging.Logger.getLogger(DrawingPanel.class.getName()).log(java.util.logging.Level.SEVERE, null, ex);
        }
        //

        /* Create and display the form */
        java.awt.EventQueue.invokeLater(new Runnable() {
            public void run() {
                new DrawingPanel().setVisible(true);
            }
        });
    }

    // Variables declaration - do not modify                     
    private javax.swing.JLabel jLabel1;
    // End of variables declaration                   
}

Catatan : Klik kiri untuk membuat objek lingkaran dan klik kanan untuk mewarnai objek.

Itulah cara Grafika Komputer : Mewarnai Objek - Java.

Terima kasih.

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