convert LPD3DXMESH to SMeshBuffer

[dehseth]

hi,

i am looking for a way to convert my d3dxmesh to smeshbuffer. I created this dx mesh from 3dfont.. any way to do it easily?

[dehseth]

well I wrote it here's the code:

Code: Select all

DWORD fvf = mesh->GetFVF();
	if (fvf == (D3DFVF_XYZ | D3DFVF_NORMAL)) // 3dtext returns this FVF
	{
		D3DVERTEXELEMENT9 dec[MAX_FVF_DECL_SIZE];
		ZeroMemory(dec, sizeof(D3DVERTEXELEMENT9) * MAX_FVF_DECL_SIZE);
		if (FAILED(mesh->GetDeclaration(dec)))
		{
			MessageBoxA(NULL, "Cannot get declaration of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		D3DVERTEXELEMENT9 pos, normal;

		for (int i = 0; i < 2; i++) // only 2 type defined
		{
			if (dec[i].Usage == D3DDECLUSAGE_POSITION && dec[i].Type != D3DDECLTYPE_UNUSED)
			{
				pos = dec[i];
			}
			else if (dec[i].Usage == D3DDECLUSAGE_NORMAL && dec[i].Type != D3DDECLTYPE_UNUSED)
			{
				normal = dec[i];
			}
		}

		if (pos.Type != D3DDECLTYPE_FLOAT3)
		{
			MessageBoxA(NULL, "Vertex position is not float3 type!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		if (normal.Type != D3DDECLTYPE_FLOAT3)
		{
			MessageBoxA(NULL, "Vertex normal is not float3 type!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		SMeshBuffer* buffer = new SMeshBuffer();
		DWORD vertex_count = mesh->GetNumVertices();
		DWORD vertex_size = mesh->GetNumBytesPerVertex();
		LPDIRECT3DVERTEXBUFFER9 vb;
		
		if (FAILED(mesh->GetVertexBuffer(&vb)))
		{
			MessageBoxA(NULL, "Cannot get vertex buffer of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		char* pVertices;

		if (FAILED(vb->Lock(0, 0, (void**)&pVertices, D3DLOCK_READONLY)))
		{
			MessageBoxA(NULL, "Cannot lock vertex buffer of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}
		
		buffer->Vertices.reallocate(vertex_count);

		for (DWORD i = 0; i < vertex_count; i++)
		{
			S3DVertex v;

			memcpy(&v.Pos, &pVertices[pos.Offset], sizeof(float) * 3);
			memcpy(&v.Normal, &pVertices[normal.Offset], sizeof(float) * 3);			
			v.Color = SColor(255,255,255,255);
			buffer->Vertices.push_back(v);

			pVertices += vertex_size;
		}
		
		if (FAILED(vb->Unlock()))
		{
			MessageBoxA(NULL, "Cannot unlock vertex buffer of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}
		
		LPDIRECT3DINDEXBUFFER9 ib;
		if (FAILED(mesh->GetIndexBuffer(&ib)))
		{
			MessageBoxA(NULL, "Cannot get index buffer of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		D3DINDEXBUFFER_DESC index_desc;
		if (FAILED(ib->GetDesc(&index_desc)))
		{
			MessageBoxA(NULL, "Cannot get index buffer description of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}
		
		if (index_desc.Format != D3DFMT_INDEX16)
		{
			MessageBoxA(NULL, "Index buffer is not 16bit!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		char* pIndices;
		if (FAILED(ib->Lock(0, 0, (void**)&pIndices, D3DLOCK_READONLY)))
		{
			MessageBoxA(NULL, "Cannot lock index buffer of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		void* indices_buffer = malloc(index_desc.Size);

		if (!indices_buffer)
		{
			MessageBoxA(NULL, "Cannot allocate memory for new index buffer!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}

		memcpy(indices_buffer, pIndices, index_desc.Size);

		buffer->Indices.set_pointer((u16*)indices_buffer, index_desc.Size>>1);			

		if (FAILED(ib->Unlock()))
		{
			MessageBoxA(NULL, "Cannot unlock index buffer of mesh!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
			exit(0);
		}
		
		mesh->Release();

		return buffer;
	}
	else
	{
		MessageBoxA(NULL, "Cannot recognize FVF format!", "3D Text", MB_OK|MB_ICONERROR|MB_APPLMODAL);
		exit(0);
	}