In file include/igraph3d.h:

## struct G3DPolygonDPFX

> Structure containing all info needed by DrawPolygonFX (DPFX)

float flat_color_r
  Use this color for drawing (if txt_handle == NULL) instead of a texture.
G3DFogInfo fog_info[100]
  Extra optional fog information.
float inv_aspect
  Invert aspect ratio that was used to perspective project the vertices (1/fov)
int num
  Current number of vertices.
ITextureHandle* txt_handle
  The texture handle as returned by ITextureManager.
bool use_fog
  Use fog info?
G3DTexturedVertex vertices[100]
  Vertices that form the polygon.

## Documentation

> Structure containing all info needed by DrawPolygonFX (DPFX)

`int num`
  Current number of vertices.

`G3DTexturedVertex vertices[100]`
  Vertices that form the polygon.

`G3DFogInfo fog_info[100]`
  Extra optional fog information.

`bool use_fog`
  Use fog info?

`float inv_aspect`
  Invert aspect ratio that was used to perspective project the vertices (1/fov)

`ITextureHandle* txt_handle`
  The texture handle as returned by ITextureManager.

`float flat_color_r`
  Use this color for drawing (if txt_handle == NULL) instead of a texture.

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