# NNS_G3D_SBC_NODE

## Command Format

Offset (bytes) | Description
--- | ---
0 | `NNS_G3D_SBC_NODEMIX`
1 | Node ID.
2 | If the lower order bit is 1, the node will be displayed. If the bit is 0 the node will not be displayed.

## Description

The `NNS_G3D_SBC_NODE` command declares the node to which the material and shape information sent after this command belong. By default, this command calls the `sbc.c` function `NNSi_G3dFuncSbc_NODE`. This function internally performs the following processes:

1. Sets the `NNSG3dVisAnmResult` structure's pointer to the `pVisAnmResult` member in the `NNS_G3dRS` structure.
2. Checks the timing `A` callback. Callbacks in this position are convenient when substituting the visibility calculation to the callback function. You can skip processing until the next callback by setting the `NNS_G3D_RSFLAG_SKIP` flag in the `NNS_G3dRS` structure in the callback function.
3. Sets `*pVisAnmResult` in response to whether the visibility information is static image or animation.
4. Checks the timing `B` callback. Callbacks in this position are convenient when processing the results of the visibility calculation in the callback function.
5. Sets the `NNS_G3dRS` flag in response to the results of `*pVisAnmResult`. Depending on whether subsequent commands use this flag, the polygons in the node are displayed or not displayed (visibility animation).
6. Checks the timing `C` callback. Callbacks in this position are used when performing some sort of operation after this command finishes.

Timing for Calling a Callback Function | Usage
--- | ---
`NNS_G3D_SBC_CALLBACK_TIMING_A` | When you want to use a user callback to override the visibility calculations.
`NNS_G3D_SBC_CALLBACK_TIMING_B` | When you want to extract or manipulate the visibility calculation results.
`NNS_G3D_SBC_CALLBACK_TIMING_C` | When you want to insert some process after this command ends.

## See Also

## Revision History

2004/10/14 Added description.
2004/08/02 Initial version.

CONFIDENTIAL