Java-Gaming.org Hi !
Featured games (83)
games approved by the League of Dukes
Games in Showcase (538)
Games in Android Showcase (132)
games submitted by our members
Games in WIP (601)
games currently in development
News: Read the Java Gaming Resources, or peek at the official Java tutorials
 
    Home     Help   Search   Login   Register   
Pages: [1]
  ignore  |  Print  
  [SOLVED] [LWJGL] Trouble with Display Lists  (Read 977 times)
0 Members and 1 Guest are viewing this topic.
Offline penguin

Senior Newbie





« Posted 2011-03-15 13:30:08 »

Hi there,

Today i've started with writing a little "engine" for drawing simple figures (triangles, quads, etc.).
I use DisplayLists cause of the lower cpu usage, but now here is my problem:
I generate the Objects in an own class, but if i draw them they don't appear.

Here are the Sources:

IFigure.java
1  
2  
3  
4  
5  
6  
7  
8  
9  
package com.engine.objects;

/**
 *
 * @author penguin
 */

public interface IFigure {
    public int getObjectList();
}


Triangle.java
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  
package com.engine.objects;

/**
 *
 * @author penguin
 */

import org.lwjgl.opengl.GL11;

public class Triangle implements IFigure {
    private Vertex[] Vertices;
    private int DisplayList;
    public Triangle(Vertex p1, Vertex p2, Vertex p3) {
        Vertices = new Vertex[3];
        Vertices[0] = p1;
        Vertices[1] = p2;
        Vertices[2] = p3;
        DisplayList = GL11.glGenLists(1);
        this.genObject();
    }

    private void genObject()
    {
        /*GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
        GL11.glLoadIdentity();*/

        GL11.glNewList(DisplayList, GL11.GL_COMPILE);

        GL11.glBegin(GL11.GL_TRIANGLES);
            for (int i = 0; i < Vertices.length; i++) {
                if(Vertices[i].isTextureAvailable())
                    Vertices[i].bindTexture();

                GL11.glVertex3f(Vertices[i].getX(), Vertices[i].getY(), Vertices[i].getZ());

                if(Vertices[i].isColorAvailable())
                    GL11.glColor3f(Vertices[i].getRed(), Vertices[i].getGreen(), Vertices[i].getBlue());

                if(Vertices[i].isMappingAvailable() && Vertices[i].isTextureAvailable())
                    GL11.glTexCoord2f(Vertices[i].getU(), Vertices[i].getV());
          GL11.glEnd();
          GL11.glEndList();
        }
    }
    public int getObjectList()
    {
        return DisplayList;
    }
}

Vertex.java
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  
package com.engine.objects;

/**
 *
 * @author penguin
 */

import org.lwjgl.util.vector.Vector3f;
import org.lwjgl.util.vector.Vector2f;
import org.newdawn.slick.opengl.Texture;

public class Vertex {
    private Vector3f Coordinates;
    private Vector3f Color;
    private Vector2f MappingCoordinates;
    private Texture theTexture;

    public Vertex(Vector3f coordinates, Vector3f color, Vector2f mappingcoordinates, Texture thetexture)
    {
        Coordinates = coordinates;
        Color = color;
        MappingCoordinates = mappingcoordinates;
        theTexture = thetexture;
    }

    public boolean isColorAvailable() {
        if(Color != null)
            return true;
        else
            return false;
    }
    public boolean isMappingAvailable()
    {
        if(MappingCoordinates != null)
            return true;
        else
            return false;
    }
    public boolean isTextureAvailable()
    {
        if(theTexture != null)
            return true;
        else
            return false;
    }

    public void bindTexture()
    {
        theTexture.bind();
    }

    public float getX()
    {
        return Coordinates.x;
    }
    public float getY()
    {
        return Coordinates.y;
    }
    public float getZ()
    {
        return Coordinates.z;
    }
    public float getU()
    {
        return MappingCoordinates.x;
    }
    public float getV()
    {
        return MappingCoordinates.y;
    }
    public float getRed()
    {
        return Color.x;
    }
    public float getGreen()
    {
        return Color.y;
    }
    public float getBlue()
    {
        return Color.z;
    }
}


EngineTest.java (MainClass)
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  
package com;

/**
 *
 * @author penguin
 */

import org.lwjgl.opengl.Display;
import org.lwjgl.opengl.DisplayMode;
import org.lwjgl.opengl.GL11;
import java.nio.FloatBuffer;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import org.lwjgl.util.glu.GLU;
import com.engine.objects.*;
import org.lwjgl.util.vector.Vector3f;

public class EngineTest {
      public static void main(String[] args) {

          try {
              Display.setDisplayMode(new DisplayMode(800,600));
              Display.create();
          } catch (Exception e) {

          }
          // Render Simple Triangle
          initGL();

          //WorldObject myObject = new WorldObject();
          Triangle myTriangle = new Triangle(new Vertex(new Vector3f(1.0f,2.0f,1.0f),null,null,null),new Vertex(new Vector3f(1.0f,-1.0f,1.0f),null,null,null),new Vertex(new Vector3f(-1.0f,-1.0f,1.0f),null,null,null));
          //myObject.addFigure(myTriangle);
          while(!Display.isCloseRequested())
          {
              GL11.glClear(GL11.GL_COLOR_BUFFER_BIT | GL11.GL_DEPTH_BUFFER_BIT);
              GL11.glLoadIdentity();
              GL11.glTranslatef(0.0f,0.0f,-10.0f);

              GL11.glCallList(myTriangle.getObjectList());

              Display.update();
          }

          Display.destroy();

      }


      private static void initGL() {
        GL11.glMatrixMode(GL11.GL_PROJECTION);
        GL11.glLoadIdentity();
        GLU.gluPerspective(45.0f,((float)800)/((float)600),0.1f,100.0f);
        GL11.glMatrixMode(GL11.GL_MODELVIEW);
        GL11.glLoadIdentity();

        GL11.glEnable(GL11.GL_TEXTURE_2D);
        GL11.glShadeModel(GL11.GL_SMOOTH);
        GL11.glClearColor(0.0f, 0.0f, 0.0f, 0.0f);
        GL11.glClearDepth(1.0f);
        GL11.glEnable(GL11.GL_DEPTH_TEST);
        GL11.glDepthFunc(GL11.GL_LEQUAL);
        GL11.glHint(GL11.GL_PERSPECTIVE_CORRECTION_HINT, GL11.GL_NICEST);
  }
}


I'm new to OpenGL and hope someone can help me cause i don't know where the mistake can be.
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

 

Add your game by posting it in the WIP section,
or publish it in Showcase.

The first screenshot will be displayed as a thumbnail.

rwatson462 (29 views)
2014-12-15 09:26:44

Mr.CodeIt (20 views)
2014-12-14 19:50:38

BurntPizza (42 views)
2014-12-09 22:41:13

BurntPizza (76 views)
2014-12-08 04:46:31

JscottyBieshaar (37 views)
2014-12-05 12:39:02

SHC (50 views)
2014-12-03 16:27:13

CopyableCougar4 (47 views)
2014-11-29 21:32:03

toopeicgaming1999 (114 views)
2014-11-26 15:22:04

toopeicgaming1999 (102 views)
2014-11-26 15:20:36

toopeicgaming1999 (30 views)
2014-11-26 15:20:08
Resources for WIP games
by kpars
2014-12-18 10:26:14

Understanding relations between setOrigin, setScale and setPosition in libGdx
by mbabuskov
2014-10-09 22:35:00

Definite guide to supporting multiple device resolutions on Android (2014)
by mbabuskov
2014-10-02 22:36:02

List of Learning Resources
by Longor1996
2014-08-16 10:40:00

List of Learning Resources
by SilverTiger
2014-08-05 19:33:27

Resources for WIP games
by CogWheelz
2014-08-01 16:20:17

Resources for WIP games
by CogWheelz
2014-08-01 16:19:50

List of Learning Resources
by SilverTiger
2014-07-31 16:29:50
java-gaming.org is not responsible for the content posted by its members, including references to external websites, and other references that may or may not have a relation with our primarily gaming and game production oriented community. inquiries and complaints can be sent via email to the info‑account of the company managing the website of java‑gaming.org
Powered by MySQL Powered by PHP Powered by SMF 1.1.18 | SMF © 2013, Simple Machines | Managed by Enhanced Four Valid XHTML 1.0! Valid CSS!