code seems to crash when i call my make_buffer function or my render function.


void Graphics::make_buffer(GLenum object, GLenum type)
{
int offset = object * numperobj;
glGenBuffers(1, buf.buffer);
glBindBuffer(GL_ARRAY_BUFFER, buf.buffer[Vertices+ offset]);
glBufferData(GL_ARRAY_BUFFER, sizeof(floorverts), floorverts, GL_STATIC_DRAW);
glVertexPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0));
glEnableClientState(GL_VERTEX_ARRAY);

glGenBuffers(1, buf.buffer);
glBindBuffer(GL_ARRAY_BUFFER, buf.buffer[Colors + offset]);
glBufferData(GL_ARRAY_BUFFER, sizeof(floorcol), floorcol, GL_STATIC_DRAW);
glVertexPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0));
glEnableClientState(GL_COLOR_ARRAY);

glGenBuffers(1, buf.buffer);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buf.buffer[Elements + offset]);
glBufferData(GL_ELEMENT_ARRAY_BUFFER, sizeof(floorinds), floorinds, GL_STATIC_DRAW);

glBindBuffer(GL_ARRAY_BUFFER, 0);
glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, 0);

buf.PrimType[object] = type;
buf.NumElems[object] = sizeof(floorinds);
}


void Graphics::render(GLuint object)
{
int offset = object * numperobj;
glBindBuffer(GL_ARRAY_BUFFER, buf.buffer[Vertices + offset]);
glVertexPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0));
glEnableClientState(GL_VERTEX_ARRAY);

glBindBuffer(GL_ARRAY_BUFFER, buf.buffer[Colors + offset]);

glVertexPointer(3, GL_FLOAT, 0, BUFFER_OFFSET(0));
glEnableClientState(GL_COLOR_ARRAY);

glBindBuffer(GL_ELEMENT_ARRAY_BUFFER, buf.buffer[Elements + offset]);

glDrawElements(buf.PrimType[object], buf.NumElems[object], GL_UNSIGNED_INT, BUFFER_OFFSET(0));

}

When i try to debug the program i get Access violation reading location 0x00000000.

im using the libary's glew and glfw.

yes i called glewinit() after i created my window and made the window context. I dont know if it supports buffer objects but my graphics card is 330m nvidia.

Sorry if this offends you, but it's crashing because there is hardly one line of code there that isn't an error.

I'll add a full reply once I get back to my computer if nobody answers by then.

Here is a big problem and most likely the source of your problems:

..snip..
glGenBuffers(1, buf.buffer); // You allocate a single buffer here.
glBindBuffer(GL_ARRAY_BUFFER, buf.buffer[Vertices+ offset]); // And then access it like an array here.
..snip..
}

If "buf.buffers" is an array, then you need to tell glGenBuffers how many buffers to generate. You are currently telling it to create one buffer, and then you access it like an array of buffers.

Also, you need a separate buffer for each array. One for "GL_VERTEX_ARRAY", one for "GL_COLOR_ARRAY" and one for "GL_ELEMENT_ARRAY". You are calling glGenBuffers three times in a row on the same buffer, thereby overwriting the buffer. At the end of your "make_buffer" function, only the element buffer exists.