A dazed image rendering

[Grinvon]

I have create a simple start exemple, folling some code of source tutorial, Start well, but create a confez image, distorced like below...



What can I do to fix it?

Thanks all!

[anarchotron]

Please post source code.

It looks like you might not be clearing your color and depth buffers.

JW

[Grinvon]

Thanks anarcotron, The code follows below...

1   2   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19   20   21   22   23   24   25   26   27   28   29   30   31   32   33   34   35   36   37   38   39   40   41   42   43   44   45   46   47   48   49   50   51   52   53   54   55   56   57   58   59   60   61   62   63   64   65   66   67   68   69   70   71   72   73   74   75   76   77   78   79   80   81   82   83   84   85   86   87   88   89   90   91   92   93   94

package org.gldemos; import org.lwjgl.LWJGLException; import org.lwjgl.Sys; import org.lwjgl.opengl.Display; import org.lwjgl.opengl.DisplayMode; import org.lwjgl.opengl.GL11; /**  * @author inocencio  *  * TODO To change the template for this generated type comment go to  * Window - Preferences - Java - Code Style - Code Templates  */ public class init {        private DisplayMode chosenModel = null;    private boolean running = true;        int width = 800;    int height = 600;        init() {             try {                    DisplayMode[] modes = Display.getAvailableDisplayModes();                    for (int i=0; i < modes.length; i++) {                         if ((modes[i].getWidth() == width) && (modes[i].getHeight() == height)) {                chosenModel = modes[i];                break;             }          }                 }   catch(LWJGLException ex) {          Sys.alert("Error", "Unable to determine display mode");          System.exit(0);                 }             if (chosenModel == null) {          Sys.alert("Error","Unable to find display mode");          System.exit(0);       }             try {          Display.setDisplayMode(chosenModel);          Display.setTitle("Example 01");          Display.create();       }   catch(LWJGLException ex) {          Sys.alert("Error","Unable to create display");          System.exit(0);       }             //seta um background      GL11.glClearColor(0,0,0,0);             runningGame();              }        public void runningGame() {             float pos = 0.0f;             //renderiza usando OpenGL             while(running) {                    pos += 0.01f;          GL11.glBegin(GL11.GL_QUADS);              GL11.glVertex3f(0,0,pos);              GL11.glVertex3f(1,0,pos);              GL11.glVertex3f(1,1,pos);              GL11.glVertex3f(0,1,pos);            GL11.glEnd();            Display.update();                        if (Display.isCloseRequested())               running = false;       }             Display.destroy();       System.exit(0);    }    public static void main(String[] args) {             new init();    } }

Games published by our own members! Check 'em out!

[anarchotron]

Yes you need to call GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT) prior to your rendering.

[Grinvon]

I have put the line that you show me into main loop

1   2   3   4   5   6   7   8   9   10   11   12   13   14   15   16   17   18   19

while(running) {          GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);          pos += 0.01f;          GL11.glBegin(GL11.GL_QUADS);              GL11.glVertex3f(0,0,pos);              GL11.glVertex3f(1,0,pos);              GL11.glVertex3f(1,1,pos);              GL11.glVertex3f(0,1,pos);            GL11.glEnd();            Display.update();                        if (Display.isCloseRequested())               running = false;                        if (Keyboard.isKeyDown(Keyboard.KEY_ESCAPE))               running = false;       }

The screen start and continues in full black. Vertex3f can render a Square or Triangle?

[anarchotron]

Also in your code you never setup the projection matrix.  This very same problem was discussed here:

http://192.18.37.44/forums/index.php?topic=10965.0

[Riven]

Last but not least you never define the color..

You need the RedBook, shouldn't be hard to find with Google.

[Grinvon]

Thanks all. I will checkout the "RedBook", its the real title?

[anarchotron]

Red Book:

http://www.opengl.org/documentation/red_book_1.0/

[Grinvon]

Red Book:

http://www.opengl.org/documentation/red_book_1.0/

thaks for support me anarchotron! =D