Strange problem with Imagine 4 FP

03 March 2003, 21:48

Hi!

Please excuse me, but I have a strange problem with Imagine 4 FPU version...

For any object, if I put a SPECULAR above 0, the program didn't render a light spot but a great monochrome circle.

Is this a FPU bug?

Toni Wilen · 04 March 2003, 10:43

More information, thanks..

Does switching JIT on/off have any effect, CPU type etc...
WinUAE version.

04 March 2003, 12:17

I'm using the latest WinUAE in 68040 Mode. I tryed removing JIT effects, but the problem remains

Thank you.

16 March 2003, 11:04

I also have that problem! I've encountered it in every version of WinUAE I've used. I kept meaning to post about it before but always forgot.

Misc info:
* does not occur on my real Amiga 2000 (+ 030/882)
* occured in pre-JIT versions of WinUAE
* occurs in both Imagine 3 and 4
* occurs only in the FPU versions of Imagine
* occurs under all CPU and chipset settings
* occurs under both kickstart/Workbench 2.0 and 3.1

I've attached a couple rendered pics that illustrate the problem...

16 March 2003, 11:07

YES! It's it!!!!

So, it's really a FPU emulation bug!

Toni Wilen · 16 March 2003, 11:54

Can someone write simple step-by-step instructions to reproduce this bug?

16 March 2003, 12:01

Nothing special: just create a simple object, and in his ATTRIBUTES put a SPECULAR value different from zero.

Then make a render...and the risult is above...

03 March 2003, 21:48	#1
Hell Posts: n/a	Strange problem with Imagine 4 FP Hi! Please excuse me, but I have a strange problem with Imagine 4 FPU version... For any object, if I put a SPECULAR above 0, the program didn't render a light spot but a great monochrome circle. Is this a FPU bug?

16 March 2003, 11:04	#4
Argh! Posts: n/a	I also have that problem! I've encountered it in every version of WinUAE I've used. I kept meaning to post about it before but always forgot. Misc info: * does not occur on my real Amiga 2000 (+ 030/882) * occured in pre-JIT versions of WinUAE * occurs in both Imagine 3 and 4 * occurs only in the FPU versions of Imagine * occurs under all CPU and chipset settings * occurs under both kickstart/Workbench 2.0 and 3.1 I've attached a couple rendered pics that illustrate the problem... Attached Thumbnails

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04 March 2003, 10:43	#2
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,519	More information, thanks.. Does switching JIT on/off have any effect, CPU type etc... WinUAE version.

04 March 2003, 12:17	#3
Hell Posts: n/a	I'm using the latest WinUAE in 68040 Mode. I tryed removing JIT effects, but the problem remains Thank you.

16 March 2003, 11:07	#5
Hell Posts: n/a	YES! It's it!!!! So, it's really a FPU emulation bug!

16 March 2003, 11:54	#6
Toni Wilen WinUAE developer Join Date: Aug 2001 Location: Hämeenlinna/Finland Age: 49 Posts: 26,519	Can someone write simple step-by-step instructions to reproduce this bug?

16 March 2003, 12:01	#7
Hell Posts: n/a	Nothing special: just create a simple object, and in his ATTRIBUTES put a SPECULAR value different from zero. Then make a render...and the risult is above...

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