Quote:Original post by skanatic
Does your code work without VBO:s?

Quote:Original post by codechallenged
Sorry if this thing had been asked before. I have tried searching the forums but I get an error message. I am still quite a newb and I am trying to get my head in implementing Vertex Buffer Objects.

This is my struct

typedef struct _my_vertex
{
float tu, tv;
float r, g, b, a;
float nx, ny, nz;
float x, y, z;
} my_vertex;


I fill g_vertices with information about my model.

Next, I then create my buffer

unsigned int g_VBOvertices;

glGenBuffersARB( 1, &g_VBOvertices );
glBindBufferARB( GL_ARRAY_BUFFER_ARB, g_VBOvertices );
glBufferDataARB( GL_ARRAY_BUFFER_ARB, sizeof(g_vertices), g_vertices, GL_STATIC_DRAW_ARB );

Then my rendering loop

{
glBindBufferARB( GL_ARRAY_BUFFER_ARB, g_VBOvertices );
glTexCoordPointer(2, GL_FLOAT, 12 * sizeof(float), 0);
glColorPointer(4, GL_FLOAT, 12 * sizeof(float), (void*)(2 * sizeof(float)) );
glNormalPointer(GL_FLOAT, 12 * sizeof(float), (void*)(6 * sizeof(float)) );
glVertexPointer(3, GL_FLOAT, 12 * sizeof(float), (void*)(9 * sizeof(float)) );

glEnableClientState(GL_VERTEX_ARRAY);
glEnableClientState(GL_TEXTURE_COORD_ARRAY);
glEnableClientState(GL_NORMAL_ARRAY);
glEnableClientState(GL_COLOR_ARRAY);

glDrawArrays(GL_TRIANGLES, 0, numvertices);

glDisableClientState(GL_VERTEX_ARRAY);
glDisableClientState(GL_TEXTURE_COORD_ARRAY);
glDisableClientState(GL_NORMAL_ARRAY);
glDisableClientState(GL_COLOR_ARRAY);
}

My program crashes and I cannot figure out why. Am I setting the offsets of my gl*Pointer functions correctly? Any help will be very much appreciated.

glBufferDataARB( GL_ARRAY_BUFFER_ARB, sizeof(g_vertices), g_vertices, GL_STATIC_DRAW_ARB );