Calling (re)paint method
This is code of my program
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
import java.util.*;
import java.io.*;
publicclass MyPanelextends JPanel{
int V , E;
Vector P =new Vector();
MyVector x =new MyVector();
MyVector y =new MyVector();
MyVector z =new MyVector();
public MyPanel(){
x.setX(1);
x.setY(0);
y.setX(0);
y.setY(1);
z.setX(1.41 / 2);
z.setY(-1.41 / 2);
// ucitava podatke iz filea
try{
DataInputStream in =new DataInputStream(
new BufferedInputStream(
new FileInputStream("cude4d.dat")));
V = Integer.parseInt(in.readLine());
double x , y , z;
for (int i = 0 ; i < V ; i++){
StringTokenizer st =new StringTokenizer(in.readLine() ," ");
x = Double.parseDouble(st.nextToken());
y = Double.parseDouble(st.nextToken());
z = Double.parseDouble(st.nextToken());
MyPoint v =new MyPoint();
v.setX(x);
v.setY(y);
v.setZ(z);
P.addElement(v);
}
E = Integer.parseInt(in.readLine());
int a , b;
for (int i = 0 ; i < E ; i++){
StringTokenizer st =new StringTokenizer(in.readLine() ," ");
a = Integer.parseInt(st.nextToken());
b = Integer.parseInt(st.nextToken());
a--;
b--;
((MyPoint)(P.elementAt(a))).addNeighbour(b);
((MyPoint)(P.elementAt(b))).addNeighbour(a);
}
in.close();
}
catch(Exception ex){
ex.printStackTrace();
}
}
publicvoid paint(Graphics g){
super.paint(g);
for (int i = 0 ; i < P.size() ; i++){
MyPoint b = (MyPoint)(P.elementAt(i));
g.drawOval((int)(b.getX() * x.getX() + b.getY() * y.getX() + b.getZ() * z.getX() + 100),
(int)(b.getX() * x.getY() + b.getY() * y.getY() + b.getZ() * z.getY() + 100), 2 , 2);
}
for (int i = 0 ; i < P.size() ; i++){
MyPoint p = (MyPoint)P.elementAt(i);
for (int j = 0 ; j < p.getSize() ; j++){
int idx = p.getNeighbour(j);
MyPoint a = (MyPoint)(P.elementAt(idx));
MyPoint b = (MyPoint)(P.elementAt(i));
g.drawLine((int)(b.getX() * x.getX() + b.getY() * y.getX() + b.getZ() * z.getX() + 100),
(int)(b.getX() * x.getY() + b.getY() * y.getY() + b.getZ() * z.getY() + 100) ,
(int)(a.getX() * x.getX() + a.getY() * y.getX() + a.getZ() * z.getX() + 100),
(int)(a.getX() * x.getY() + a.getY() * y.getY() + a.getZ() * z.getY() + 100));
}
}
try{
Thread.currentThread().sleep(50);
System.out.println("repaint");
}catch(Exception ex){
ex.printStackTrace();
}
}
publicvoid update(Graphics g){
paint(g);
}
publicvoid rotation(int type,double sAngle){
double rot[][] =newdouble[3][3];
double angle = 3.14 / 180;
for (int a = 0 ; a < sAngle ; a += 2){
if (type == 1){
rot[0][0] = 1; rot[0][1] = 0; rot[0][2] = 0;
rot[1][0] = 0; rot[1][1] = Math.cos(angle); rot[1][2] = -Math.sin(angle);
rot[2][0] = 0; rot[2][1] = Math.sin(angle); rot[2][2] = Math.cos(angle);
}
elseif(type == 2){
rot[0][0] = Math.cos(angle); rot[0][1] = 0; rot[0][2] = -Math.sin(angle);
rot[1][0] = 0; rot[1][1] = 1; rot[1][2] = 0;
rot[2][0] = Math.sin(angle); rot[2][1] = 0; rot[2][2] = Math.cos(angle);
}
else{
rot[0][0] = Math.cos(angle); rot[0][1] = -Math.sin(angle); rot[0][2] = 0;
rot[1][0] = Math.sin(angle); rot[1][1] = Math.cos(angle); rot[1][2] = 0;
rot[2][0] = 0; rot[2][1] = 0; rot[2][2] = 1;
}
for (int i = 0 ; i < P.size() ; i++){
MyPoint p = (MyPoint)P.elementAt(i);
double x = p.getX() , y = p.getY() , z = p.getZ();
p.setX(rot[0][0] * x + rot[0][1] * y + rot[0][2] * z);
p.setY(rot[1][0] * x + rot[1][1] * y + rot[1][2] * z);
p.setZ(rot[2][0] * x + rot[2][1] * y + rot[2][2] * z);
}
System.out.println("pre-repaint");
repaint();
}
}
}
On the screen there writes more "pre-repaint" then "repaint". What I should do that method paint() be called each time I call repaint?
Thank you.
P.S. If someone wants, I can send code of all classes. It is code for rotating cube.
