Posted by adi on Feb 28, 2017; 10:20pm
URL: https://forum.jogamp.org/Problem-with-creating-more-VBO-Buffers-tp4037689.html

Hello

I have the following Problem.
I stop my 3D animated Renderer with that sequence of code:

/* FPSAnimator anim = new com.jogamp.opengl.util.FPSAnimator( glDrawable, 80 );*/
anim.pause();
Renderer3D renderer3D = Renderer3D.getInstance();
glDrawable.removeGLEventListener(renderer3D);
Renderer2D renderer2D = Renderer2D.getInstance();
glDrawable.addGLEventListener(renderer2D);
renderer2D.init(glDrawable);

I the got a Problem in the init method, if i create the buffers:

final GL4 gl = glDrawable.getGL().getGL4();
private int vbobuffer[] = new int[2];
private int vaobuffer[] = new int[1];
......
1) gl.glGenVertexArrays( 1, vaobuffer, 0);
2) gl.glBindVertexArray(vaobuffer[0]);
3) gl.glGenBuffers( vbobuffer.length, vbobuffer, 0 );
4) gl.glBindBuffer( GL4.GL_ARRAY_BUFFER, vbobuffer[0] );
5) gl.glBufferData( GL4.GL_ARRAY_BUFFER, vertexBuffer.capacity()<<2, vertexBuffer, GL4.GL_STATIC_DRAW );
6) gl.glVertexAttribPointer(ShaderConstants.VERTEX_BUF, 2, GL4.GL_FLOAT, false, 0, 0);
7) gl.glEnableVertexAttribArray(ShaderConstants.VERTEX_BUF);
8) if ( tex_coordBuffer!=null )
9) {
10) gl.glBindBuffer( GL4.GL_ARRAY_BUFFER, vbobuffer[1] );
11) gl.glBufferData( GL4.GL_ARRAY_BUFFER, tex_coordBuffer.capacity()<<2, tex_coordBuffer, GL4.GL_STATIC_DRAW );
12) gl.glVertexAttribPointer(ShaderConstants.TEXTURE_BUF0, 2, GL4.GL_FLOAT, false, 0, 0);
13) gl.glEnableVertexAttribArray(ShaderConstants.TEXTURE_BUF0);
14) }
.........

Now in line 5 it crashes with the following exception:

Exception in thread "main-Display-.windows_nil-1-EDT-1" com.jogamp.opengl.GLException: GL_INVALID_OPERATION: Buffer for target 0x8892 not bound
        at jogamp.opengl.GLBufferObjectTracker.createBufferStorage(GLBufferObjectTracker.java:164)
        at jogamp.opengl.gl4.GL4bcImpl.glBufferData(GL4bcImpl.java:40258)  

Are the names/id's in the vbo- or vao-buffers in the application not global?
Ich have seen that in line 3),

gl.glGenBuffers( vbobuffer.length, vbobuffer, 0 );

the names/id's are always 0. How can it be?
That describes the exception.  

Then is my next question,
musst all buffer-ids (with glDeleteBuffers)  are deleted, before i can use
new buffers with (glGenBuffers) ?
It seems there is a conflict.