MID GRAFIKA KOMPUTER
SOAL :
1. Rotasi titik A,B,C terhadap titik X(200,200) dengan sudut pusat 45 derajat.
2. Translasi terhadap T(50 dan 100) dari kedua nomor tersebut:
a. Buatlah lisning programnya !
b. Tentukan titik-titik hasil rotasi A translasinya !!!
JAWAB :
1. Berikut ini lisning untuk membuat rotasi seperti soal diatas
package membuat_rotasi;
import java.awt.*;
import java.awt.event.*;
public class Membuat_rotasi extends Frame implements ActionListener{
int x = 200;
int y = 200;
public static void main(String[] args) {
Frame frame = new Membuat_rotasi();
frame.setSize(640, 480);
frame.setVisible(true);
}
public Membuat_rotasi() {
setTitle("Membuat rotasi");
// create menu
MenuBar mb = new MenuBar();
setMenuBar(mb);
Menu menu = new Menu("File");
mb.add(menu);
MenuItem mi = new MenuItem("Exit");
mi.addActionListener(this);
menu.add(mi);
// end program when window is closed
WindowListener l = new WindowAdapter() {
@Override
public void windowClosing(WindowEvent ev) {
System.exit(0);
}
};
this.addWindowListener(l);
// mouse event handler
MouseListener mouseListener = new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent ev) {
x = ev.getX();
y = ev.getY();
repaint();
}
};
addMouseListener(mouseListener);
}
@Override
public void paint(Graphics g) {
int xasalA = 150; int yasalA = 100;
int xasalB = 100; int yasalB = 250;
int xasalC = 200; int yasalC = 250;
int sudut = 45;
g.setColor(Color.blue);
g.drawLine(xasalA,yasalA, xasalB,yasalB);
g.drawLine(xasalB,yasalB,xasalC,yasalC);
long xA = Math.round(x+(xasalA-x)*Math.cos(sudut)-(yasalA-y)*Math.sin(sudut));
long yA = Math.round(x+(xasalA-x)*Math.sin(sudut)-(yasalA-y)*Math.cos(sudut));
long xB = Math.round(x+(xasalB-x)*Math.cos(sudut)-(yasalB-y)*Math.sin(sudut));
long yB = Math.round(x+(xasalB-x)*Math.sin(sudut)-(yasalB-y)*Math.cos(sudut));
long xC = Math.round(x+(xasalC-x)*Math.cos(sudut)-(yasalC-y)*Math.sin(sudut));
long yC = Math.round(x+(xasalC-x)*Math.sin(sudut)-(yasalC-y)*Math.cos(sudut));
int xA1 = (int)xA; int yA1 = (int)yA;
int xB1 = (int)xB; int yB1 = (int)yB;
int xC1 = (int)xC; int yC1 = (int)yC;
g.drawLine(xA1,yA1, xB1,yB1);
g.drawLine(xB1,yB1, xC1,yC1);
}
@Override
public void actionPerformed(ActionEvent ev) {
String command = ev.getActionCommand();
if ("Exit".equals(command)) {
System.exit(0);
}
}
}
Dan berikut adalah hasilnya setelah diruning
2.
a. Lisning program untuk membuat translasi seperti soal diatas
package membuat_translasi;
import java.awt.*;
import java.awt.event.*;
public class Membuat_translasi extends Frame implements ActionListener{
int x = 50;
int y = 100;
public static void main(String[] args) {
Frame frame = new Membuat_translasi();
frame.setSize(640, 480);
frame.setVisible(true);
}
public Membuat_translasi() {
setTitle("AWT Demo");
// create menu
MenuBar mb = new MenuBar();
setMenuBar(mb);
Menu menu = new Menu("File");
mb.add(menu);
MenuItem mi = new MenuItem("Exit");
mi.addActionListener(this);
menu.add(mi);
// end program when window is closed
WindowListener l = new WindowAdapter() {
public void windowClosing(WindowEvent ev) {
System.exit(0);
}
};
this.addWindowListener(l);
// mouse event handler
MouseListener mouseListener = new MouseAdapter() {
public void mouseClicked(MouseEvent ev) {
int x = 50;
int y = 100;
repaint();
}
};
addMouseListener(mouseListener);
}
public void paint(Graphics g) {
g.drawLine(20, 20, 150, 200);
g.drawLine(20+x, 20+y, 150+x, 200+y);
}
public void actionPerformed(ActionEvent ev) {
String command = ev.getActionCommand();
if ("Exit".equals(command)) {
System.exit(0);
}
}
}
b. Hasilnya seperti berikut
