DrawIndexedPrinitive

Show us that method´s code.
You will probably trying to acces to some data outside the vertex buffer(it is like an array). Check your
UINT MinIndex,
UINT NumVertices,
UINT StartIndex,
UINT PrimitiveCount
params.



.-Question:Is there an typpo,bug or how you want to call it in the C++ DX8.0 SDK, in the DrawPrimitive page, at the very bottom: it does:

d3dDevice->DrawPrimitive( D3DPT_TRIANGLESTRIP, 0, 5 );
to draw a 4 triangles mesh. They must have looked at the upper mesh...




What the hells!

>DrawIndexedPrimitive(D3DPT_TRIANGLELIST, 0,
>sizeof(indices) / sizeof(indices[0]), 0, ...

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^!!!

The number of vertices in VB may not always equal to
the number of indices. Suppose you have just one vertex
and, say, 28 indices referring to it. You should pass
the actual number of vertices, NOT INDICES!

Also, you correctly set your stream source (the vertices) but you forgot to set your index source. You need to call:

pD3dDevice->SetIndices( [IDirect3DIndexBuffer8* here], 0 );

...before you call DrawIndexedPrimitive(). This will also cause an access violation because DX will try to access a non-existant index buffer.

Sorry to draw attention from your problem, but I wonder why you are using DrawIndexedPrimitive and not just a regular call to DrawPrimitive?

Thanks,



Zeblar Nagrim, Lord of Chaos

I fixed the problem..it turned out to be a c++ problem.

I am a java programmer, so I''m learning DX and c++ at the same time.

In my class def, I declared direct references to my sprites and it caused the sprite objects to go out of scope too early. I changed the declarations to be pointers and it fixed it. Why is this?