Jump to content

View more

Image of the Day

Working on an auto spawn system. #gamedev #indiedev #screenshotsaturday https://t.co/Mm2kfekz7b
IOTD | Top Screenshots

The latest, straight to your Inbox.

Subscribe to GameDev.net Direct to receive the latest updates and exclusive content.


Sign up now

How do you use bvecs (GLSL) ?

4: Adsense

Old topic!

Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. If you wish to continue this conversation start a new topic.


  • You cannot reply to this topic
2 replies to this topic

#1 TysonJ   Members   

145
Like
0Likes
Like

Posted 02 November 2012 - 10:10 AM

I'm confused about bvecs. What can you do with them? Is their only use in the expressions if (any(bvec)) and if (all(bvec))?

I would like to efficiently generate a vector B from another vector A, where B.n is 1. if n is the largest component of A, and 0. otherwise.
so {0.1, 0.2, 0.8., 0.} -> {0., 0., 1., 0.}

I would like to do something like (greaterThan(A, A.yzwx) & greaterThan(A, A.zwxy) & greaterThan(A, A.wxyz)).ToFVec()... but of course it doesn't work that way...

Edited by TysonJ, 02 November 2012 - 10:11 AM.


#2 swiftcoder   Senior Moderators   

18210
Like
0Likes
Like

Posted 02 November 2012 - 11:11 AM

Given a vector, V,

bvec3 Result = greaterThan(V.xyz, greaterThan(V.yzx, V.zxy));


Or am I missing something?

Tristam MacDonald - Software Engineer @ Amazon - [swiftcoding] [GitHub]


#3 TysonJ   Members   

145
Like
0Likes
Like

Posted 02 November 2012 - 11:53 AM

That doesn't work because the first greaterThan is mixing a vec and a bvec, and in any case I want a vec out of it, not a bvec.




Old topic!

Guest, the last post of this topic is over 60 days old and at this point you may not reply in this topic. If you wish to continue this conversation start a new topic.