Java-Gaming.org Hi !
Featured games (90)
games approved by the League of Dukes
Games in Showcase (687)
Games in Android Showcase (198)
games submitted by our members
Games in WIP (758)
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 1425 times)
0 Members and 1 Guest are viewing this topic.
Offline Waterwolf

Junior Devvie


Medals: 3



« Posted 2011-12-03 13:18:00 »

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: 438
Projects: 3
Exp: 5 years


I'm the King!


« Reply #1 - Posted 2011-12-03 13:33:49 »

You didn't flip your buffers Wink

Offline Waterwolf

Junior Devvie


Medals: 3



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

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.

 
roseslayer (582 views)
2016-08-06 11:43:29

roseslayer (537 views)
2016-08-06 09:43:11

xTheGamerCodes (609 views)
2016-08-04 15:40:59

xTheGamerCodes (604 views)
2016-08-04 15:40:24

orrenravid (950 views)
2016-07-16 03:57:23

theagentd (1028 views)
2016-07-11 14:28:54

Hydroque (1133 views)
2016-07-06 05:56:57

Hydroque (1076 views)
2016-07-03 08:52:54

GrandCastle (893 views)
2016-07-01 09:13:47

GrandCastle (647 views)
2016-07-01 09:09:45
Rendering resources
by Roquen
2016-08-08 05:55:21

Rendering resources
by Roquen
2016-08-08 05:52:42

Rendering resources
by Roquen
2016-08-08 05:50:38

Rendering resources
by Roquen
2016-08-08 05:49:53

Rendering resources
by Roquen
2016-08-08 05:32:39

Making a Dynamic Plugin System
by Hydroque
2016-06-25 00:13:25

Java Data structures
by BinaryMonkL
2016-06-13 21:22:09

Java Data structures
by BinaryMonkL
2016-06-13 21:20:42
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!