d3d9.dllLockVertexBuffer
Microsoft DirectX 9.0 SDK Update (October 2004)

ID3DXPatchMesh::LockVertexBuffer Method


Lock the vertex buffer.

Syntax

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 Value

If the method succeeds, the return value is D3D_OK.

If the method fails, the return value can be one of the following values.

D3DERR_INVALIDCALLThe method call is invalid. For example, a method's parameter may have an invalid value.
E_OUTOFMEMORYMicrosoft Direct3D could not allocate sufficient memory to complete the call.


Remarks

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

Patch meshes use 16-bit index buffers.



© 2004 Microsoft Corporation. All rights reserved.
Feedback? Please provide us with your comments on this topic.
For more help, visit the DirectX Developer Center.