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Thread: solution for my project
 05272008, 12:31 AM #1Member
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 05272008, 04:48 AM #2
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Hi shelqa,
Welcome to our community. :)
Before post again here please read FAQ page of our community. And at the same time, please keep in mind that no one here in our community wants just give a code. What we do is, giving helping hand to anyone who stuck with anything related to Java.
 05272008, 11:25 PM #3Member
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repost
This is code:
import java.awt.*;
import java.awt.geom.*;
import java.awt.event.*;
import java.util.*;
import javax.swing.*;
public class BSpline extends JApplet {
public static void main(String s[]) {
JFrame frame = new JFrame();
frame.setTitle("BSpline");
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOS E);
JApplet applet = new BSpline();
applet.init();
frame.getContentPane().add(applet);
frame.pack();
frame.setVisible(true);
}
public void init() {
JPanel panel = new BSplinePanel();
getContentPane().add(panel);
}
}
class BSplinePanel extends JPanel
implements MouseListener, MouseMotionListener {
Vector points = null;
boolean completed = true;
public BSplinePanel() {
setPreferredSize(new Dimension(640, 480));
setBackground(Color.white);
addMouseListener(this);
addMouseMotionListener(this);
points = new Vector();
}
public void paintComponent(Graphics g) {
super.paintComponent(g);
Graphics2D g2 = (Graphics2D)g;
Point p0 = null;
Point p1 = null;
Point p2 = null;
Point p3 = null;
float x1, y1, x2, y2, x3, y3, x4, y4;
Iterator it = points.iterator();
if (it.hasNext()) {
p1 = (Point)(it.next());
}
while (it.hasNext()) {
p2 = (Point)(it.next());
g2.drawLine(p1.x, p1.y, p2.x, p2.y);
p1 = p2;
}
GeneralPath spline = new GeneralPath();
int n = points.size();
if (n == 0) return;
p1 = (Point)points.get(0);
spline.moveTo(p1.x, p1.y);
g2.drawRect(p1.x3, p1.y3, 6, 6);
p1 = (Point)points.get(1);
p2 = (Point)points.get(2);
p3 = (Point)points.get(3);
x1 = p1.x;
y1 = p1.y;
x2 = (p1.x + p2.x)/2.0f;
y2 = (p1.y + p2.y)/2.0f;
x4 = (2.0f*p2.x+p3.x)/3.0f;
y4 = (2.0f*p2.y+p3.y)/3.0f;
x3 = (x2+x4)/2.0f;
y3 = (y2+y4)/2.0f;
spline.curveTo(x1, y1, x2, y2, x3, y3);
g2.drawRect((int)x13, (int)y13, 6, 6);
g2.drawRect((int)x23, (int)y23, 6, 6);
g2.drawRect((int)x33, (int)y33, 6, 6);
for (int i = 2; i < n  4; i++) {
p1 = p2;
p2 = p3;
p3 = (Point)points.get(i+2);
x1 = x4;
y1 = y4;
x2 = (p1.x+2.0f*p2.x)/3.0f;
y2 = (p1.y+2.0f*p2.y)/3.0f;
x4 = (2.0f*p2.x+p3.x)/3.0f;
y4 = (2.0f*p2.y+p3.y)/3.0f;
x3 = (x2+x4)/2.0f;
y3 = (y2+y4)/2.0f;
spline.curveTo(x1,y1,x2,y2,x3,y3);
g2.drawRect((int)x13, (int)y13, 6, 6);
g2.drawRect((int)x23, (int)y23, 6, 6);
g2.drawRect((int)x33, (int)y33, 6, 6);
}
p1 = p2;
p2 = p3;
p3 = (Point)points.get(n2);
x1 = x4;
y1 = y4;
x2 = (p1.x+2.0f*p2.x)/3.0f;
y2 = (p1.y+2.0f*p2.y)/3.0f;
x4 = (p2.x+p3.x)/2.0f;
y4 = (p2.y+p3.y)/2.0f;
x3 = (x2+x4)/2.0f;
y3 = (y2+y4)/2.0f;
spline.curveTo(x1,y1,x2,y2,x3,y3);
g2.drawRect((int)x13, (int)y13, 6, 6);
g2.drawRect((int)x23, (int)y23, 6, 6);
g2.drawRect((int)x33, (int)y33, 6, 6);
p2 = p3;
p3 = (Point)points.get(n1);
x1 = x4;
y1 = y4;
x2 = p2.x;
y2 = p2.y;
x3 = p3.x;
y3 = p3.y;
spline.curveTo(x1,y1,x2,y2,x3,y3);
g2.drawRect((int)x13, (int)y13, 6, 6);
g2.drawRect((int)x23, (int)y23, 6, 6);
g2.drawRect((int)x33, (int)y33, 6, 6);
g2.draw(spline);
}
public void mouseClicked(MouseEvent ev) {
}
public void mouseEntered(MouseEvent ev) {
}
public void mouseExited(MouseEvent ev) {
}
public void mousePressed(MouseEvent ev) {
Graphics g = getGraphics();
if (completed) {
points.clear();
completed = false;
}
if (ev.getClickCount() == 1) {
Point p =ev.getPoint();
points.add(p);
g.fillOval(p.x3, p.y3, 6, 6);
}
}
public void mouseReleased(MouseEvent ev) {
if (ev.getClickCount() > 1) {
completed = true;
repaint();
}
}
public void mouseMoved(MouseEvent ev) {
}
public void mouseDragged(MouseEvent ev) {
}
}
and I need to modify to write my project
By SHKELQA
 05282008, 03:53 AM #4
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You mean wants to add you name there?
 05282008, 10:31 PM #5Member
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From Shkelqim about Bezier
I upload four codes with java that you can help me in my project
My project is:
Write a 3D Bézier surface editor. Display the control points of the surface as square dots. Allow the user to select and move a control point with mouse operations and update the surface accordingly
and before need to modify codes in attach at completeLast edited by shkelqa; 05282008 at 10:44 PM.
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