Quote:Original post by Evil SteveQuote:Original post by ClaudioYes.
While if I want to use the vertex buffer "D3DVB" ?
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Is correct ?
Quote:Original post by Evil SteveQuote:Original post by ClaudioYes.
While if I want to use the vertex buffer "D3DVB" ?
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Is correct ?Quote:Original post by ClaudioBecause you're not checking return values. What do the Debug Runtimes say?
Appear error about "access violation to..."
Quote:Original post by Evil SteveQuote:Original post by ClaudioYes.
While if I want to use the vertex buffer "D3DVB" ?
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Is correct ?Quote:Original post by ClaudioBecause you're not checking return values. What do the Debug Runtimes say?
Appear error about "access violation to..."
Quote:Original post by ClaudioAt the line that dereferences a null pointer. I can't tell you where that is, but if you check your return values, and use the debug runtimes and your Debugger, you'll be able to find it.
The error is:
Unhandled exception at 0x0040119a: 0xC0000005: Access violation reading location 0x00000000
Where is the problem ?
Quote:Original post by ClaudioThen that code isn't being executed.
If I insert a messaggeBox in any case (D3D_Ok or else), don't appear any messagebox.
Quote:Original post by Evil SteveQuote:Original post by ClaudioAt the line that dereferences a null pointer. I can't tell you where that is, but if you check your return values, and use the debug runtimes and your Debugger, you'll be able to find it.
The error is:
Unhandled exception at 0x0040119a: 0xC0000005: Access violation reading location 0x00000000
Where is the problem ?
EDIT:Quote:Original post by ClaudioThen that code isn't being executed.
If I insert a messaggeBox in any case (D3D_Ok or else), don't appear any messagebox.
Quote:Original post by ClaudioThat valus is 0xcccccccc, which means an uninitialized variable. You're looking at the value before it's been set.
The returned value is negative: -858993460
Quote:Original post by Evil SteveQuote:Original post by ClaudioThat valus is 0xcccccccc, which means an uninitialized variable. You're looking at the value before it's been set.
The returned value is negative: -858993460
Again, the debug runtimes will tell you WHY it's failing.
hRes = D3DDev->SetStreamSource(0, D3DVB, 0, sizeof(VERTEX3D));Quote:Original post by ClaudioYou only need to call SetStreamSource() after creating the vertex buffer, and then you can call DrawPrimitive or DrawIndexedPrimitive, yes.
So, I've to associate the vertex buffer to the device with:
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during the rendering phase.
Only this ?
Quote:Original post by ClaudioIf you're using meshes, why not use DrawSubset() instead of circumventing everything that ID3DXMesh is trying to do? But yes, that's all you should need to do if you want to get the VB from a mesh and set it as active on a device.
So, for create, get and associate the vertex buffer from D3DMesh, I've to use only the above function ?
Quote:Original post by ClaudioWhat is the error?
Where am I in error ?
VERTEX3D Vertices; hRes = D3DDev->CreateVertexBuffer(sizeof(Vertices), D3DUSAGE_WRITEONLY, 0, D3DPOOL_DEFAULT, &D3DVB, NULL); if (FAILED(hRes)) return hRes; hRes = D3DDev->SetStreamSource(0, D3DVB, 0, sizeof(VERTEX3D)); /////////// if (FAILED(hRes)) return hRes; VERTEX3D * vertex = NULL; VOID* pVertices; D3DVB->Lock(0, 0, &pVertices, D3DLOCK_READONLY); memcpy(pVertices, (VOID*)&vertex, sizeof(vertex)); // get the total number of vertices: DWORD numVerts = GetD3DMesh()->GetNumVertices(); for (unsigned int ni = 0; ni < numVerts; ni++) { // access to the vertex data } D3DVB->Unlock();Quote:Original post by ClaudioIn that code, you have two completely unrelated classes - the vertex buffer, D3DVB and the mesh, D3DMesh. The mesh contains a vertex buffer, which is loaded when the mesh is loaded.
-where the initial vertex data are loaded from the D3DMesh ? with "CreateVertexBuffer" ?
Quote:Original post by ClaudioI don't understand this question, sorry. You're not checking if Lock() succeeds though, so if it's failing, pVertices will be a null or invalid pointer and accessing it will crash your application with an access violation.
-are the vertex data contained in "pVertices" at the fine ?!
Quote:Original post by ClaudioLocking a vertex buffer gives you access to the vertices in that buffer. If you lock a buffer with no flags, then it assumes you want read/write access to it. If you lock a buffer with the D3DLOCK_READONLY flag, you can only read from the buffer and writing to it will in the best case crash, and in the worst case lead to undefined behaviour.
-how can I access to the filed of the final data ? because I can't access to "pVertices" at the same manner of "vertex"
-if I wan't print the data contained in "vertex", I've to use simple "vertex" ? because the pronted data are not correct.
