Just another update

2015-02-20 00:35:01 -05:00 · 2015-02-20 00:35:01 -05:00 · 00a190b0a6
commit 00a190b0a6
parent a25938f123
6591 changed files with 94363 additions and 23227 deletions
--- a/Task/Bitmap-Bresenhams-line-algorithm/Java/bitmap-bresenhams-line-algorithm.java
+++ b/Task/Bitmap-Bresenhams-line-algorithm/Java/bitmap-bresenhams-line-algorithm.java
@ -0,0 +1,93 @@
+import java.awt.*;
+import javax.swing.*;
+
+public class Bresenham extends JFrame {
+
+    public static void main(String[] args) {
+        SwingUtilities.invokeLater(new Runnable() {
+            @Override
+            public void run() {
+                JFrame f = new Bresenham();
+                f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
+                f.setVisible(true);
+                f.add(new BresenhamPanel(), BorderLayout.CENTER);
+                f.setTitle("Bresenham");
+                f.setResizable(false);
+                f.pack();
+                f.setLocationRelativeTo(null);
+            }
+        });
+    }
+}
+
+class BresenhamPanel extends JPanel {
+    final int centerX, centerY;
+
+    public BresenhamPanel() {
+        int w = 600;
+        int h = 500;
+        centerX = w / 2;
+        centerY = h / 2;
+        setPreferredSize(new Dimension(w, h));
+        setBackground(Color.white);
+    }
+
+    @Override
+    public void paintComponent(Graphics g) {
+        super.paintComponent(g);
+
+        drawLine(g, 0, 0, 8, 19); // NNE
+        drawLine(g, 0, 0, 19, 8); // ENE
+        drawLine(g, 0, 0, 19, -8); // ESE
+        drawLine(g, 0, 0, 8, -19); // SSE
+        drawLine(g, 0, 0, -8, -19); // SSW
+        drawLine(g, 0, 0, -19, -8); // WSW
+        drawLine(g, 0, 0, -19, 8); // WNW
+        drawLine(g, 0, 0, -8, 19); // NNW
+    }
+
+    private void plot(Graphics g, int x, int y) {
+        g.setColor(Color.black);
+        g.drawOval(centerX + (x * 10), centerY + (-y * 10), 10, 10);
+    }
+
+    private void drawLine(Graphics g, int x1, int y1, int x2, int y2) {
+        // delta of exact value and rounded value of the dependant variable
+        int d = 0;
+
+        int dy = Math.abs(y2 - y1);
+        int dx = Math.abs(x2 - x1);
+
+        int dy2 = (dy << 1); // slope scaling factors to avoid floating
+        int dx2 = (dx << 1); // point
+
+        int ix = x1 < x2 ? 1 : -1; // increment direction
+        int iy = y1 < y2 ? 1 : -1;
+
+        if (dy <= dx) {
+            for (;;) {
+                plot(g, x1, y1);
+                if (x1 == x2)
+                    break;
+                x1 += ix;
+                d += dy2;
+                if (d > dx) {
+                    y1 += iy;
+                    d -= dx2;
+                }
+            }
+        } else {
+            for (;;) {
+                plot(g, x1, y1);
+                if (y1 == y2)
+                    break;
+                y1 += iy;
+                d += dx2;
+                if (d > dy) {
+                    x1 += ix;
+                    d -= dy2;
+                }
+            }
+        }
+    }
+}