CreateVertexBuffer和CreateIndexBuffer

CreateVertexBuffer的形参说明

HRESULT CreateVertexBuffer(
  UINT Length,
  DWORD Usage,
  DWORD FVF,
  D3DPOOL Pool,
  IDirect3DVertexBuffer9** ppVertexBuffer,
  HANDLE* pSharedHandle
);
­
length：
指定缓冲区的大小，以字节为单位。

Usage:
指定顶点缓冲区的属性，可以设置成0：
FVF：
这个就用到了我们上面创建的灵活顶点格式

Pool：
指定顶点缓冲区的内存类型。我们采用的是D3DPOOL_DEFAULT，意思是顶点缓冲区尽可能存在显存中。其他参数详细请参见SDK文档。
ppVertexBuffer:

自己定义的IDirect3DVertexBuffer9的指针
pSharedHandle:
它是一个保留的参数可以设置为NULL。

IDirect3DDevice9::CreateIndexBuffer

Creates an index buffer.

HRESULT CreateIndexBuffer( UINT Length，定点缓存长度 DWORD Usage，指定关于如何使用顶点缓存的一些附加属性 D3DFORMAT Format,指定索引大小 D3DPOOL Pool,内存池 IDirect3DIndexBuffer9** ppIndexBuffer,接收索引缓存的指针 HANDLE* pSharedHandle ); 

Parameters

Length

[in] Size of the index buffer, in bytes.

Usage

[in] Usage can be 0, which indicates no usage value. However, if usage is desired, use a combination of one or more D3DUSAGE constants. It is good practice to match the usage parameter in CreateIndexBuffer with the behavior flags in CreateDevice. For more information, see Remarks.

Format

[in] Member of the D3DFORMATenumerated type, describing the format of the index buffer. For more information, see Remarks. The valid settings are the following:

D3DFMT_INDEX16

Indices are 16 bits each.

D3DFMT_INDEX32

Indices are 32 bits each.

Pool

[in] Member of the D3DPOOLenumerated type, describing a valid memory class into which to place the resource.

ppIndexBuffer

[out, retval] Address of a pointer to an IDirect3DIndexBuffer9interface, representing the created index buffer resource.

pSharedHandle

[in] Reserved. Set this parameter to NULL.