copyHDRBuffer(float *buffer) malfunction(?) in sdk 11

Discussion for users of the Indigo Renderer SDK.
Post Reply
8 posts • Page 1 of 1
User avatar
fused
Developer
Posts: 3648
Joined: Fri Sep 22, 2006 7:19 am
Location: Berlin, Germany
3D Software: Cinema 4D

copyHDRBuffer(float *buffer) malfunction(?) in sdk 11

Post by fused » Sun Dec 14, 2008 12:20 am

it seems that copyHDRBuffer(float *buffer) will only work if copyBuffer(indUChar8 *buffer) was called before. otherwise it will result in an access violation.

can someone confirm, or is it even intended?

edit: also, this function is not documented :)

User avatar
fused
Developer
Posts: 3648
Joined: Fri Sep 22, 2006 7:19 am
Location: Berlin, Germany
3D Software: Cinema 4D

Post by fused » Sun Dec 14, 2008 6:53 am

is there a special reason why the values are clamped to 1.0?

User avatar
OnoSendai
Developer
Posts: 6243
Joined: Sat May 20, 2006 6:16 pm
Location: Wellington, NZ
Contact:

Post by OnoSendai » Sun Dec 14, 2008 8:46 pm

Crashing is never intended :)

User avatar
fused
Developer
Posts: 3648
Joined: Fri Sep 22, 2006 7:19 am
Location: Berlin, Germany
3D Software: Cinema 4D

Post by fused » Sun Dec 14, 2008 11:17 pm

:P

what i actually meant is if its not intended to be used without copyBuffer().
feel free to answer my other question, too, ono :)

User avatar
OnoSendai
Developer
Posts: 6243
Joined: Sat May 20, 2006 6:16 pm
Location: Wellington, NZ
Contact:

Post by OnoSendai » Mon Dec 15, 2008 10:52 am

It should be able to be used independently of copyBuffer.

It shouldn't be clamped to 1.0.

User avatar
suvakas
3rd Place Winner
Posts: 2613
Joined: Mon Sep 04, 2006 11:08 pm
Location: Estonia
Contact:

Post by suvakas » Sat Dec 20, 2008 2:49 am

I have a question about the image buffer too. Don't want to make a new thread about it so i ask it here (i hope you don't mind).
What are the max and min values of the pixel color channel when I use:

copyBuffer(buffer);
r = (float)((const char*)buffer)[(y*w + x)*3];

I mean what's the possible lowest and what's the highest value of r?
I'm experimenting with some image filters here and I'm offten geting very funky colors. So i'm thinking i have to clamp my color values, but i'm not sure what are the legal max and min for r,g,b inside the buffer. Cause it seems, that they are not 0-255. Or are they?

User avatar
OnoSendai
Developer
Posts: 6243
Joined: Sat May 20, 2006 6:16 pm
Location: Wellington, NZ
Contact:

Post by OnoSendai » Sat Dec 20, 2008 11:10 am

Yes, they're 0-255.
char can be signed, use unsigned char instead.

User avatar
suvakas
3rd Place Winner
Posts: 2613
Joined: Mon Sep 04, 2006 11:08 pm
Location: Estonia
Contact:

Post by suvakas » Sat Dec 20, 2008 12:09 pm

Thanks a million !
Unsigned char did the trick.

Post Reply
8 posts • Page 1 of 1

Who is online

Users browsing this forum: No registered users and 2 guests