ID3DXPatchMesh::LockVertexBuffer

Lock the vertex buffer.

HRESULT LockVertexBuffer(
  DWORD flags,
  LPVOID * ppData
);

Parameters

flags

[in] Combination of zero or more locking flags that describe the type of lock to perform. For this method, the valid flags are:

• D3DLOCK_DISCARD
• D3DLOCK_NO_DIRTY_UPDATE
• D3DLOCK_NOSYSLOCK
• D3DLOCK_READONLY
• D3DLOCK_NOOVERWRITE

For a description of the flags, see D3DLOCK.

ppData

[out, retval] VOID* pointer to a memory buffer containing the returned vertex data.

Return Values

If the method succeeds, the return value is D3D_OK. If the method fails, the return value can be one of the following: D3DERR_INVALIDCALL, E_OUTOFMEMORY.

Remarks

The vertex buffer is usually locked, written to, and then unlocked for reading.

Patch meshes use 16-bit index buffers.

Requirements

Header: Declared in D3dx9mesh.h.