Vp_t Struct Reference

#include <gbi.h>

Data Fields
short	vtrans [4]

Detailed Description

The viewport structure elements have 2 bits of fraction, necessary to accomodate the sub-pixel positioning scaling for the hardware. This can also be exploited to handle odd-sized viewports.

Accounting for these fractional bits, using the default projection and viewing matrices, the viewport structure is initialized thusly:

 (SCREEN_WD/2)*4, -(SCREEN_HT/2)*4, G_NEW_MAXZ/2, 0,
 (SCREEN_WD/2)*4,  (SCREEN_HT/2)*4, G_NEW_MAXZ/2, 0,

Field Documentation

vtrans

short vtrans[4]

scale, 2 bits fraction (X and Y only)

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The documentation for this struct was generated from the following file:

• gbi.h