Spotlight textures

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gthomas++at++icaen.uiowa.edu
Tue, 26 Aug 1997 08:23:35 -0500 (CDT)

I'm trying to project a single image as a spotlight texture onto a surface,
but can't seem to get the image from repeating or cropping. I've tried a
variety of tricks, particularly focusing on:

  pfTexRepeat(myTexture, TX_WRAP, PFTEX_SELECT);

followed by:

  pfLSourceAttr(myLightSource, PFLS_PROJ_TEX, myTexture);

but can't get the projection to end at the boundary of the photo. Either it
wraps or clamps, depending on what else I've been fooling with.

Could it be my hardware? hinv gives:

Video: MVP unit 0 version 1.2
AV: AV1 Card version 1, O2Cam type 1 version 0 connected.
FLASH PROM version 4.0
On-board serial ports: 2
On-board EPP/ECP parallel port
1 180 MHZ IP32 Processor
FPU: MIPS R5000 Floating Point Coprocessor Revision: 1.0
CPU: MIPS R5000 Processor Chip Revision: 2.1
Data cache size: 32 Kbytes
Instruction cache size: 32 Kbytes
Secondary unified instruction/data cache size: 512 Kbytes on Processor 0
Main memory size: 64 Mbytes
Iris Audio Processor: version A3 revision 0
Integral Ethernet: ec0, version 1
  Tape drive: unit 7 on SCSI controller 1: DAT
    Disk drive / removable media: unit 3 on SCSI controller 1
  CDROM: unit 4 on SCSI controller 0
  Disk drive: unit 1 on SCSI controller 0
CRM graphics installed
Integral SCSI controller 1: Version ADAPTEC 7880
Integral SCSI controller 0: Version ADAPTEC 7880
Vice: DX

Thanks for the help.

- Geb

-- 
Dr. Geb Thomas                   The GROK Lab
Industrial Engineering           (o)  (319) 335-5936
The University of Iowa           (f)  (319) 335-5424
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