PSSetShaderResources function ：

void PSSetShaderResources(
  [in]           UINT                     StartSlot,
  [in]           UINT                     NumViews,
  [in, optional] ID3D11ShaderResourceView * const *ppShaderResourceViews
);

Parameters ：

[in] StartSlot

type ： UINT

Set start index （ Range ：0-127）.

[in] NumViews

type ： UINT

Number of shader resources to set . most 128 Slots are available for shader resources （ Range ：0-127）.

[in, optional] ppShaderResourceViews

type ：ID3D11ShaderResourceView *

The array of rendering resources to set .

DrawIndexed function ：

void DrawIndexed(
  [in] UINT IndexCount,
  [in] UINT StartIndexLocation,
  [in] INT  BaseVertexLocation
);

Parameters ：

[in] IndexCount

type ： UINT

The number of indices to plot .

[in] StartIndexLocation

type ： UINT

Start index .（ from 0 Start ）

[in] BaseVertexLocation

type ：INT

The value added to each index before reading vertices from the vertex buffer .

IASetVertexBuffers function ：

void IASetVertexBuffers(
  [in]           UINT         StartSlot,
  [in]           UINT         NumBuffers,
  [in, optional] ID3D11Buffer * const *ppVertexBuffers,
  [in, optional] const UINT   *pStrides,
  [in, optional] const UINT   *pOffsets
);

Parameters ：

[in] StartSlot

type ：UINT

The first input slot for binding . The first vertex buffer is explicitly bound to the starting slot ; This will cause each additional vertex buffer in the array to be implicitly bound to each subsequent input slot . At most 16 or 32 Input slots （ Range from 0 To D3D11_IA_VERTEX_INPUT_RESOURCE_SLOT_COUNT - 1）; The maximum number of input slots depends on the feature level .（ Vertex buffer start index ）

[in] NumBuffers

type ： UINT

The number of vertex buffers in the array . Number of buffers （ Add starting slot ） No more than IA Total number of stage input slots （ Range from 0 To D3D11_IA_VERTEX_INPUT_RESOURCE_SLOT_COUNT - StartSlot）.（ Number of vertex buffers ）

[in, optional] ppVertexBuffers

type ： ID3D11Buffer *

Pointer to vertex buffer array （ Please see the  ID3D11Buffer）. Vertex buffer must be used  D3D11_BIND_VERTEX_BUFFER  Flag creation .（ My understanding is to set the vertex buffer ）

[in, optional] pStrides

type ： CONST UNIT*

Pointer to the stride value array ; A step value for each buffer in the vertex buffer array . Each step is the size of the element to be used from the vertex buffer （ In bytes ）.（ My understanding is vertex byte size , That is, set the size of the vertex buffer ）

[in, optional] pOffsets

type ：CONST UNIT*

Pointer to the array of offset values ; An offset value for each buffer in the vertex buffer array . Each offset is the number of bytes between the first element of the vertex buffer and the first element to be used .（ My understanding is the vertex buffer offset value ）

IASetIndexBuffer function ：

void IASetIndexBuffer(
  [in, optional] ID3D11Buffer *pIndexBuffer,
  [in]           DXGI_FORMAT  Format,
  [in]           UINT         Offset
);

Parameters ：

[in, optional] pIndexBuffer

type ：ID3D11Buffer *

Point to  ID3D11Buffer object The pointer to , This object contains the index . Index buffer must be used  D3D11_BIND_INDEX_BUFFER  Flag creation .

[in] Format

type ： DXGI_FORMAT

One individual DXGI_FORMAT, It specifies the format of the data in the index buffer . The only format allowed for index buffer data is 16 position （DXGI_FORMAT_R16_UINT） and 32 position （DXGI_FORMAT_R32_UINT） Integers .

[in] Offset

type ：UINT

The offset from the beginning of the index buffer to the first index to be used （ In bytes ）.

memcpy_s function ：

_CRT_MEMCPY_S_INLINE errno_t __CRTDECL memcpy_s(
        _Out_writes_bytes_to_opt_(_DestinationSize, _SourceSize) void*       const _Destination,
        _In_                                                     rsize_t     const _DestinationSize,
        _In_reads_bytes_opt_(_SourceSize)                        void const* const _Source,
        _In_                                                     rsize_t     const _SourceSize
        )

Parameters ：

Buffer to create ; The size of the created buffer ; Buffer to be copied ; Size of copied data