Java-Gaming.org
Play Revenge of the Titans! The situation is critical. We need fancy commanders to defend Earth, the moon, Mars!
Featured games (78)
games approved by the League of Dukes
Games in Showcase (406)
games submitted by our members
Games in WIP (293)
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  
  VBOs not working  (Read 486 times)
0 Members and 1 Guest are viewing this topic.
Offline Waterwolf

Junior Member


Medals: 3



« Posted 2011-12-03 14:18:00 »

So I tried to get VBOs to work but it doesn't render anything and I couldn't find anything being the noob I am  Shocked

Here's the code for rendering a box
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  
95  
public class TestModel implements Model {
   
   int vertexBufferID;
   
   // cube ///////////////////////////////////////////////////////////////////////
  //  v6----- v5
  // /|      /|
  //v1------v0|
  //| |     | |
  //| |v7---|-|v4
  //|/      |/
  //v2------v3
 
   //vertex coords array
  FloatBuffer vertices = BufferUtils.createFloatBuffer(3 * 24).put(new float[] {1,1,1,  -1,1,1,  -1,-1,1,  1,-1,1,        // v0-v1-v2-v3
                      1,1,1,  1,-1,1,  1,-1,-1,  1,1,-1,        // v0-v3-v4-v5
                      1,1,1,  1,1,-1,  -1,1,-1,  -1,1,1,        // v0-v5-v6-v1
                      -1,1,1,  -1,1,-1,  -1,-1,-1,  -1,-1,1,    // v1-v6-v7-v2
                      -1,-1,-1,  1,-1,-1,  1,-1,1,  -1,-1,1,    // v7-v4-v3-v2
                      1,-1,-1,  -1,-1,-1,  -1,1,-1,  1,1,-1});   // v4-v7-v6-v5
 
   //normal array
  FloatBuffer normals = BufferUtils.createFloatBuffer(3 * 24).put(new float[] {0,0,1,  0,0,1,  0,0,1,  0,0,1,             // v0-v1-v2-v3
                     1,0,0,  1,0,0,  1,0,0, 1,0,0,              // v0-v3-v4-v5
                     0,1,0,  0,1,0,  0,1,0, 0,1,0,              // v0-v5-v6-v1
                     -1,0,0,  -1,0,0, -1,0,0,  -1,0,0,          // v1-v6-v7-v2
                     0,-1,0,  0,-1,0,  0,-1,0,  0,-1,0,         // v7-v4-v3-v2
                     0,0,-1,  0,0,-1,  0,0,-1,  0,0,-1});        // v4-v7-v6-v5
 
   //color array
  FloatBuffer colors = BufferUtils.createFloatBuffer(3 * 24).put(new float[] {1,1,1,  1,1,0,  1,0,0,  1,0,1,              // v0-v1-v2-v3
                    1,1,1,  1,0,1,  0,0,1,  0,1,1,              // v0-v3-v4-v5
                    1,1,1,  0,1,1,  0,1,0,  1,1,0,              // v0-v5-v6-v1
                    1,1,0,  0,1,0,  0,0,0,  1,0,0,              // v1-v6-v7-v2
                    0,0,0,  0,0,1,  1,0,1,  1,0,0,              // v7-v4-v3-v2
                    0,0,1,  0,0,0,  0,1,0,  0,1,1});             // v4-v7-v6-v5
 
   public TestModel() {
      vertexBufferID = createVBOID();
      System.out.println("VBO id: " + vertexBufferID);
      renderToVbo();
   }
   
   public static int createVBOID() {
      if (GLContext.getCapabilities().GL_ARB_vertex_buffer_object) {
         IntBuffer buffer = BufferUtils.createIntBuffer(1);
         ARBVertexBufferObject.glGenBuffersARB(buffer);
         return buffer.get(0);
      }
      return 0;
   }

        // Helper method
  public int sizeof(FloatBuffer fb) {
      return fb.capacity();
   }
   
   public void renderToVbo() {
     
     
      ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, vertexBufferID);
     
      ARBVertexBufferObject.glBufferDataARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, sizeof(vertices)+sizeof(normals)+sizeof(colors), ARBVertexBufferObject.GL_STATIC_DRAW_ARB);
      ARBVertexBufferObject.glBufferSubDataARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, 0, vertices);                             // copy vertices starting from 0 offest
     ARBVertexBufferObject.glBufferSubDataARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, sizeof(vertices), normals);                // copy normals after vertices
     ARBVertexBufferObject.glBufferSubDataARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, sizeof(vertices)+sizeof(normals), colors);  // copy colours after normals
     
   }

   
   @Override
   public void render() {

     
      ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, vertexBufferID);

      GL11.glEnableClientState(GL11.GL_NORMAL_ARRAY);
      GL11.glEnableClientState(GL11.GL_COLOR_ARRAY);
      GL11.glEnableClientState(GL11.GL_VERTEX_ARRAY);

      GL11.glNormalPointer(GL11.GL_FLOAT, 0, sizeof(vertices));
      GL11.glColorPointer(3, GL11.GL_FLOAT, 0, (sizeof(vertices)+sizeof(normals)));
      GL11.glVertexPointer(3, GL11.GL_FLOAT, 0, 0);

      GL11.glDrawArrays(GL11.GL_QUADS, 0, 24);
     
      GL11.glDisableClientState(GL11.GL_VERTEX_ARRAY);  // disable vertex arrays
     GL11.glDisableClientState(GL11.GL_COLOR_ARRAY);
      GL11.glDisableClientState(GL11.GL_NORMAL_ARRAY);

                ARBVertexBufferObject.glBindBufferARB(ARBVertexBufferObject.GL_ARRAY_BUFFER_ARB, 0);

   }

}


To render it I simply use testModel.render()
Offline ra4king

JGO Kernel


Medals: 264
Projects: 2


I'm the King!


« Reply #1 - Posted 2011-12-03 14:33:49 »

You didn't flip your buffers Wink

Offline Waterwolf

Junior Member


Medals: 3



« Reply #2 - Posted 2011-12-03 14:53:13 »

Okay solved this in IRC with assistance from ra4king and MatthiasM! In case someone in distant future reads this you need to flip the buffer as ra4king said and the VBO size must be in bytes.
Pages: [1]
  ignore  |  Print  
 
 
You cannot reply to this message, because it is very, very old.

Play Revenge of the Titans! The situation is critical. We need fancy commanders to defend Earth, the moon, Mars!
 
Try the Free Demo of Revenge of the Titans

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

The first screenshot will be displayed as a thumbnail.

The invasion has landed! On Mars! And you're there to beat 'em!
cubemaster21 (76 views)
2013-05-17 21:29:12

alaslipknot (87 views)
2013-05-16 21:24:48

gouessej (117 views)
2013-05-16 00:53:38

gouessej (112 views)
2013-05-16 00:17:58

theagentd (124 views)
2013-05-15 15:01:13

theagentd (112 views)
2013-05-15 15:00:54

StreetDoggy (156 views)
2013-05-14 15:56:26

kutucuk (178 views)
2013-05-12 17:10:36

kutucuk (177 views)
2013-05-12 15:36:09

UnluckyDevil (185 views)
2013-05-12 05:09:57
Complex number cookbook
by Roquen
2013-04-24 12:47:31

2D Dynamic Lighting
by Oskuro
2013-04-17 16:46:12

2D Dynamic Lighting
by Oskuro
2013-04-17 16:45:57

2D Dynamic Lighting
by Oskuro
2013-04-17 16:23:20

Noise (bandpassed white)
by Roquen
2013-04-05 17:36:01

Noise (bandpassed white)
by Roquen
2013-04-03 16:17:38

Java Data structures
by Roquen
2013-03-29 13:21:12

Topic Request
by kutucuk
2013-03-22 21:42:01
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!
Page created in 0.324 seconds with 21 queries.