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| import java.awt.Frame;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import net.java.games.jogl.Animator;
import net.java.games.jogl.GL;
import net.java.games.jogl.GLCanvas;
import net.java.games.jogl.GLCapabilities;
import net.java.games.jogl.GLDrawable;
import net.java.games.jogl.GLDrawableFactory;
import net.java.games.jogl.GLEventListener;
import net.java.games.jogl.GLU;
public class PickSquare {
public static void main(String[] args) {
Frame frame = new Frame("PickSquare Demo");
GLCanvas canvas = GLDrawableFactory.getFactory().createGLCanvas(new GLCapabilities());
canvas.addGLEventListener(new PickSquareSample());
frame.add(canvas);
frame.setSize(300, 300);
final Animator animator = new Animator(canvas);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
animator.stop();
System.exit(0);
}
});
frame.show();
animator.start();
}
static class PickSquareSample implements GLEventListener, MouseListener {
GL myGL;
GLU myGLU;
private int board[][] = new int[3][3];
private void init () {
int i, j;
for (i = 0; i < 3; i++) {
for (j = 0; j < 3; j++) {
board [i][j] = 0;
}
}
myGL.glClearColor (0.0f, 0.0f, 0.0f, 0.0f);
}
private void drawSquares (int mode) {
int i, j;
for (i = 0; i < 3; i++) {
if (mode == GL.GL_SELECT) {
myGL.glLoadName (i);
}
for (j = 0; j < 3; j ++) {
if (mode == GL.GL_SELECT) {
myGL.glPushName (j);
}
myGL.glColor3f ((float)(i/3.0),(float)(j/3.0),(float)(board[i][j]/3.0));
myGL.glRecti (i, j, i+1, j+1);
if (mode == GL.GL_SELECT) {
myGL.glPopName ();
}
}
}
}
private void processHits (int hits, int buffer []) {
int i, j;
int ii = 0, jj = 0, names, ptr;
System.out.println ("hits = " + hits);
ptr = 0;
for (i = 0; i < hits; i++) {
names = buffer [ptr];
System.out.println (" number of names for hit = " + names); ptr++;
System.out.print (" z1 is " + buffer [ptr] + ";"); ptr++;
System.out.println (" z2 is " + buffer [ptr]); ptr++;
System.out.print (" the name is ");
for (j = 0; j < names; j++) {
System.out.print (buffer [ptr] + " ");
if (j == 0) {
ii = buffer [ptr];
} else {
jj = buffer [ptr];
}
ptr++;
}
System.out.println ();
board [ii][jj] = (board [ii][jj] + 1) % 3;
}
}
private static final int BUFSIZE = 512;
private void pickSquares (MouseEvent e) {
int selectBuf [] = new int [BUFSIZE];
int hits;
int viewport [] = new int [4];
int x, y;
x = e.getX ();
y = e.getY ();
myGL.glGetIntegerv (GL.GL_VIEWPORT, viewport);
myGL.glSelectBuffer (BUFSIZE, selectBuf);
myGL.glRenderMode (GL.GL_SELECT);
myGL.glInitNames ();
myGL.glPushName (-1);
myGL.glMatrixMode (GL.GL_PROJECTION);
myGL.glPushMatrix ();
myGL.glLoadIdentity ();
myGLU.gluPickMatrix((double)x,(double)(viewport[3]-y),5.0,5.0,viewport);
myGLU.gluOrtho2D (0.0, 3.0, 0.0, 3.0);
drawSquares (GL.GL_SELECT);
myGL.glPopMatrix ();
myGL.glFlush ();
hits = myGL.glRenderMode (GL.GL_RENDER);
processHits (hits, selectBuf);
}
public void mousePressed(MouseEvent e) {
if ((e.getModifiers() & MouseEvent.BUTTON1_MASK) == MouseEvent.BUTTON1_MASK) {
pickSquares (e);
e.consume ();
}
}
public void display (GLDrawable d) {
myGL.glClear (GL.GL_COLOR_BUFFER_BIT);
drawSquares (GL.GL_RENDER);
myGL.glFlush ();
}
public void reshape(GLDrawable drawable, int x, int y, int w, int h) {
myGL.glViewport (0, 0, w, h);
myGL.glMatrixMode (GL.GL_PROJECTION);
myGL.glLoadIdentity ();
myGLU.gluOrtho2D (0.0, 3.0, 0.0, 3.0);
myGL.glMatrixMode (GL.GL_MODELVIEW);
myGL.glLoadIdentity ();
}
public void init (GLDrawable drawable) {
myGL=drawable.getGL();
myGLU=drawable.getGLU();
drawable.addMouseListener(this);
init ();
}
public void displayChanged(GLDrawable arg0, boolean arg1, boolean arg2) {}
public void mouseClicked(MouseEvent e) {}
public void mouseEntered(MouseEvent arg0) {}
public void mouseExited(MouseEvent arg0) {}
public void mouseReleased(MouseEvent arg0) {}
}
} |
