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al - Audio Library Functions gDP - DP GBI Macros gdSP - General GBI Macros gSP - SP GBI Macros gt - Turbo Microcode RDP gu - Graphics Utilities Math - Math Functions nuSys - NuSystem os - N64 Operating System sp - Sprite Library Functions uh - Host to Target IO 64DD - N64 Disk DriveNintendo® Confidential |
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gDPSetPrimDepth
Format#include "gbi.h" gDPSetPrimDepth(Gfx *gdl, int z, int dz) gsDPSetPrimDepth(int z, int dz)Arguments
- gdl is the pointer to the graphics display list
- z is the z value
- dz is the delta z value
It sets the depth (and delta z) to be used for the entire primitive in the RDP. The Z format used in the blender is a 0,15.3 fixed-point number. The primitive Z is a 16-bit register. If the depth source is set to G_ZS_PRIM, the top bit is ignored and the remaining 15 bits of the primitive Z register provide the 15 integer bits for the Z value. With primitive Z the fractional bits are zero. The delta Z format used in the blender is a 16-bit number. The primitive delta Z can provide all 16 bits.
Note that the Z value is converted to a 14-bit quantity and the delta Z value is converted to a 4-bit quantity for storage into the Z buffer. For details on how the Z values are used and stored, please see the N64 Programming Manual.
See Also
gDPSetPrimColor
gDPSetDepthSource
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Nintendo® Confidential Warning: all information in this document is confidential and covered by a non-disclosure agreement. You are responsible for keeping this information confidential and protected. Nintendo will vigorously enforce this responsibility. Copyright © 1998 Nintendo of America Inc. All rights reserved Nintendo and N64 are registered trademarks of Nintendo Last updated January 1998 |