[quote]Java Cool Dude: He, you were asking how to do triangle strips so that’s what I explained. Maybe you should have phrased your question better? 
Anyway, I tried using display lists for my terrain it it slowed down horribly! It did okay for lots’s of smaller objects but the terrain itself just didn’t want to work :-/ It looked like it was consuming too much memory (even though there were only like 20K triangles) because after 2 seonds the application would become unresponsive and shutting it down made the hard drive trash for about 5 minutes!
PS: You say you get 510fps now, are you using any other threads in your app? If so how do you prevent starvation? Of I let my render thread go at full speed other thread hardly get any time anymore. But putting in a sleep(1) immediately drops my fps to around 80 (instead of 130-160).
[/quote]
Hey man I’m not looking into starting a pointless argument here, but when I was saying I want it to work with tirangle strips, I was referring to the following code:
gl.glDrawElements(gl.GL_TRIANGLE_STRIP, terrain.vertexIndices.length,gl.GL_UNSIGNED_INT, terrain.vertexIndices);
Turned out that if I wanted it that way, I would have to create a vertex array for every signle row or column; I feared that a lot, and Pepi confirmed it :’(
Using display lists boosts the frame rate tremendously as shown on the following screenshot:
http://www.realityflux.com/abba/displacement2.jpg
I’m gonna try to return to the glVertex call and see how it fairs, but I doubt it’ll be faster thatn DLs.
import net.java.games.jogl.*;
import net.java.games.jogl.util.GLUT;
import java.awt.event.*;
import javax.swing.*;
import java.awt.*;
public class displacementMap implements KeyListener
{
initRenderer renderer;
Animator loop;
GLCanvas canvas;
Terrain terrain;
JFrame frame;
boolean keys[] = new boolean[255];
int screenWidth,
screenHeight,
canvasHeight,
canvasWidth,
xLocation,
yLocation,
list;
public static void main(String []args) {
displacementMap demo = new displacementMap();
}
displacementMap(){
int fullScreen = JOptionPane.showConfirmDialog( null, "Would you like to run in fullscreen mode?",
"Fullscreen", JOptionPane.YES_NO_OPTION);
if(fullScreen!=0)
JFrame.setDefaultLookAndFeelDecorated(true);
frame = new JFrame("Displacement map");
screenWidth = Toolkit.getDefaultToolkit().getScreenSize().width;
screenHeight = Toolkit.getDefaultToolkit().getScreenSize().height;
switch(fullScreen){
case 0:
frame.setUndecorated(true);
break;
default:
canvasWidth = 640;
canvasHeight = 480;
xLocation = (screenWidth - canvasWidth )>>1;
yLocation = (screenHeight - canvasHeight)>>1;
frame.setLocation(xLocation,yLocation);
frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
}
canvas = GLDrawableFactory.getFactory().createGLCanvas(new GLCapabilities());
canvas.setSize(new Dimension(canvasWidth,canvasHeight));
canvas.addGLEventListener((renderer = new initRenderer()));
canvas.addKeyListener(this);
canvas.requestFocus();
frame.getContentPane().add(canvas,BorderLayout.CENTER);
frame.addWindowListener(new shutDownWindow());
frame.addKeyListener(this);
if(fullScreen==0){
GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().setFullScreenWindow(frame);
GraphicsEnvironment.getLocalGraphicsEnvironment().
getDefaultScreenDevice().setDisplayMode((new DisplayMode(640, 480, 32,
DisplayMode.REFRESH_RATE_UNKNOWN)));
}
else
frame.pack();
frame.setVisible(true);
}
public class initRenderer
implements GLEventListener
{
public void init(GLDrawable drawable){
GL gl = drawable.getGL();
terrain = new Terrain(frame, "Data/height.jpg", "Data/texture.jpg");
gl.glEnableClientState(gl.GL_VERTEX_ARRAY);
gl.glEnableClientState(gl.GL_COLOR_ARRAY);
gl.glNewList((list = gl.glGenLists(1)),gl.GL_COMPILE);
gl.glVertexPointer(3, gl.GL_FLOAT, 0, terrain.vertexData);
gl.glColorPointer( 3, gl.GL_FLOAT, 0, terrain.colorData );
gl.glDrawElements(gl.GL_TRIANGLES, terrain.vertexIndices.length,gl.GL_UNSIGNED_INT, terrain.vertexIndices);
gl.glEndList();
loop = new Animator(drawable);
loop.start();
}
public void display(GLDrawable drawable){
GL gl = drawable.getGL();
GLU glu = drawable.getGLU();
gl.glClear(GL.GL_COLOR_BUFFER_BIT | GL.GL_DEPTH_BUFFER_BIT );
gl.glLoadIdentity();
glu.gluLookAt(96,196,250, 96,0,96,0,1,0);
gl.glCallList(list);
}
public void reshape(GLDrawable drawable,
int xstart,int ystart,
int width, int height){
GL gl = drawable.getGL();
GLU glu = drawable.getGLU();
height = (height == 0) ? 1 : height;
gl.glViewport(0,0,width,height);
gl.glMatrixMode(gl.GL_PROJECTION);
gl.glLoadIdentity();
glu.gluPerspective(50.0f,(float)width/height,10.f,1700.0f);
gl.glMatrixMode(gl.GL_MODELVIEW);
gl.glLoadIdentity();
}
public void displayChanged(GLDrawable drawable,
boolean modeChanged,
boolean deviceChanged){}
}
public void processKeyboard(){}
public void keyReleased(KeyEvent evt){
keys[evt.getKeyCode()] = false;
}
public void keyPressed (KeyEvent evt){
keys[evt.getKeyCode()] = true;
if(keys[KeyEvent.VK_ESCAPE]){
loop.stop();
System.exit(0);
}
}
public void keyTyped (KeyEvent evt){}
public class shutDownWindow extends WindowAdapter {
public void windowClosing(WindowEvent e) {
loop.stop();
}
}
}
