Abdullah Al- Mamun
Applet
Posted in : Java Beginners
import javax.swing.*;
import java.awt.event.*;
import java.awt.*;

public class Triangle extends JApplet
implements MouseListener {

// The rest of the applet will be in the next
// example.
Point[] pt = new Point[3];
int ptCount = 0;

public void paint(Graphics g) {

int i;

// Draw the points that have been selected

for (i = 0; i < ptCount; i++) {
g.fillOval(pt[i].x - 10, pt[i].y - 10,
20, 20);
}

if (ptCount == 3) {

// Connect the endpoints to handle
// tall thin triangles.

g.drawLine(pt[0].x, pt[0].y,
pt[1].x, pt[1].y);
g.drawLine(pt[1].x, pt[1].y,
pt[2].x, pt[2].y);
g.drawLine(pt[0].x, pt[0].y,
pt[2].x, pt[2].y);

// Calculate x and y diffs between points.

int x0to1 = pt[1].x - pt[0].x;
int x0to2 = pt[2].x - pt[0].x;
int x1to2 = pt[2].x - pt[1].x;
int y0to1 = pt[1].y - pt[0].y;
int y0to2 = pt[2].y - pt[0].y;
int y1to2 = pt[2].y - pt[1].y;

// Left part of the triangle.

if (x0to1 > 0) {
for (i = pt[0].x; i <= pt[1].x; i++) {
g.drawLine(
i,
pt[0].y +
((y0to1 * (i - pt[0].x)) / x0to1),
i,
pt[0].y + ((y0to2 * (i - pt[0].x)) / x0to2)
);
}
}

// Right part of the triangle.

for (i = pt[1].x+1; i <= pt[2].x; i++) {
g.drawLine(
i,
pt[1].y +
((y1to2 * (i - pt[1].x)) / x1to2),
i,
pt[1].y +
((y0to2 * (i - pt[0].x)) / x0to2)
);
}
}
}
}

May 5, 2010 at 1:18 PM

Hi Friend,

Thanks

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