antialiasing using FSAA or multisampling

[polskyman]

Hi,

I would like to do a simple 4X antialiasing with the easy example of the applet. but I can get it to work antialiased.
Can you provide me the good sample of code to make it work antialiased ?

package org.lwjgl.test.applet;
 
import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Canvas;
 
import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.AWTGLCanvas;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
import org.lwjgl.util.applet.LWJGLInstaller;
 
public class AppletTestComplete extends Applet {
  
  public void init() {
    
    /* Install applet binaries */
    try {
      LWJGLInstaller.tempInstall();
    } catch (Exception le) {
      le.printStackTrace();
    }
    
    setLayout(new BorderLayout());
    try {
      Canvas canvas = new AppletCanvas();
      canvas.setSize(getWidth(), getHeight());
      add(canvas);
    } catch (Exception e) {
      e.printStackTrace();
    }
  }
  
  /*
   * @see org.lwjgl.opengl.AWTGLCanvas
   */
  public class AppletCanvas extends AWTGLCanvas {
    
    float angle = 0;
    
    /*
     * @see org.lwjgl.opengl.AWTGLCanvas#AWTGLCanvas()
     */
    public AppletCanvas() throws LWJGLException {
      // Launch a thread to repaint the canvas 60 fps
      Thread t = new Thread() {
        public void run() {
          while (true) {
            if (isVisible()) {
              repaint();
            }
            Display.sync(60);
          }
        }
      };
      t.setDaemon(true);
      t.start();      
    }
    
    /*
     * @see org.lwjgl.opengl.AWTGLCanvas#paintGL()
     */
    public void paintGL() {
      GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
      GL11.glMatrixMode(GL11.GL_PROJECTION_MATRIX);
      GL11.glLoadIdentity();
      GL11.glOrtho(0, 640, 0, 480, 1, -1);
      GL11.glMatrixMode(GL11.GL_MODELVIEW_MATRIX);
 
      GL11.glPushMatrix();
      GL11.glTranslatef(320, 240, 0.0f);
      GL11.glRotatef(angle, 0, 0, 1.0f);
      GL11.glBegin(GL11.GL_QUADS);
      GL11.glVertex2i(-50, -50);
      GL11.glVertex2i(50, -50);
      GL11.glVertex2i(50, 50);
      GL11.glVertex2i(-50, 50);
      GL11.glEnd();
      GL11.glPopMatrix();
 
      angle += 1;
 
      try {
        swapBuffers();
      } catch (Exception e) {
      }
    }   
  }
}

thank you for your help

[Matzon]

You should instantiate the applet with the constructor that allows a PixelFormat arg. Then set samples to 4 in the PixelFormat constructor

[polskyman]

thank you but could you give me the sample of code to achieve that because I do not see how to do it.
take for example the code over and tell me what to change

[Evil-Devil]

You can use the AWTGLCanvas Constructor that accepts a pixelformat.

AWTGLCanvas

public AWTGLCanvas(PixelFormat pixel_format)
           throws LWJGLException

   Create an AWTGLCanvas with the requested PixelFormat on the default GraphicsDevice.

   Parameters:
       pixelFormat - The desired pixel format. May not be null
       device - the device to create the canvas on.
   Throws:
       LWJGLException

Canvas canvas = new AppletCanvas(new PixelFormat(8,0,0,4));

Its like the default PixelFormat Constructor, except that samples is set to 4.

You have to add the Constructor to your applatcanvas class and call its parent.

[polskyman]

Sorry evil-devil but this sample code does not work.
I have no antialiased but standard jagged square.
if you have a working sample code please post it here or send it to me.
thanks

[Matzon]

check your drivers - works as expected with nvidia
specifically, check your forced AA and AF settings in the control panel

[polskyman]

AA works fine when forced.
if you know how to do matzon please post a full code sample doing AA this will help me a lot.
thanks

[Matzon]

using your code, I just added a call to the constructor accepting a pixelformat:

package org.lwjgl.test.applet;

import org.lwjgl.LWJGLException;
import org.lwjgl.opengl.AWTGLCanvas;
import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.GL11;
import org.lwjgl.opengl.PixelFormat;

/*
 * @see org.lwjgl.opengl.AWTGLCanvas
 */
public class AppletCanvas extends AWTGLCanvas {

	float	angle	= 0;

	/*
	 * @see org.lwjgl.opengl.AWTGLCanvas#AWTGLCanvas()
	 */
	public AppletCanvas() throws LWJGLException {
		super(new PixelFormat(8, 0, 0, 4));
		// Launch a thread to repaint the canvas 60 fps
		Thread t = new Thread() {

			public void run() {
				while (true) {
					if (isVisible()) {
						repaint();
					}
					Display.sync(60);
				}
			}
		};
		t.setDaemon(true);
		t.start();
	}

	/*
	 * @see org.lwjgl.opengl.AWTGLCanvas#paintGL()
	 */
	public void paintGL() {
		GL11.glClear(GL11.GL_COLOR_BUFFER_BIT);
		GL11.glMatrixMode(GL11.GL_PROJECTION_MATRIX);
		GL11.glLoadIdentity();
		GL11.glOrtho(0, 640, 0, 480, 1, -1);
		GL11.glMatrixMode(GL11.GL_MODELVIEW_MATRIX);

		GL11.glPushMatrix();
		GL11.glTranslatef(320, 240, 0.0f);
		GL11.glRotatef(angle, 0, 0, 1.0f);
		GL11.glBegin(GL11.GL_QUADS);
		GL11.glVertex2i(-50, -50);
		GL11.glVertex2i(50, -50);
		GL11.glVertex2i(50, 50);
		GL11.glVertex2i(-50, 50);
		GL11.glEnd();
		GL11.glPopMatrix();

		angle += 1;

		try {
			swapBuffers();
		} catch (Exception e) {
		}
	}
}

[polskyman]

Just compiled you sample but it does not work....

console report:

java.lang.ClassCastException

   at sun.applet.AppletPanel.createApplet(Unknown Source)

   at sun.plugin.AppletViewer.createApplet(Unknown Source)

   at sun.applet.AppletPanel.runLoader(Unknown Source)

   at sun.applet.AppletPanel.run(Unknown Source)

   at java.lang.Thread.run(Unknown Source)



please help me this is very important

[polskyman]

thank you evill devil it works