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Re: Higher performance when using unions instead of parts?

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electricpretzel0 is not online. electricpretzel0
Joined: 30 Sep 2008
Total Posts: 1278
08 Jul 2015 04:16 PM
Could this be true? Anyone have thoughts on this?
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HiddenReporter is not online. HiddenReporter
Joined: 09 Aug 2011
Total Posts: 894
08 Jul 2015 04:23 PM
This is why unions were made in the first place?


LocalScript, LocalScript, Script!
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Lineout is not online. Lineout
Joined: 06 Nov 2012
Total Posts: 684
08 Jul 2015 06:40 PM
@Hiddren Yeah, no.

They were made to allow easier access to make more complex shapes.
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Ocks67 is not online. Ocks67
Joined: 07 Mar 2009
Total Posts: 7218
08 Jul 2015 08:02 PM
A union uses as much ressources as around 40-50 parts for all I know.
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championbuilder is not online. championbuilder
Joined: 20 Jan 2009
Total Posts: 13544
08 Jul 2015 08:03 PM
Unions weren't intended to reduce lag, they're intended to make more complex shapes. Unions require both your computer and your internet to work properly.
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sparker22 is not online. sparker22
Joined: 11 Mar 2010
Total Posts: 846
08 Jul 2015 08:24 PM
Unions decrease rendering workload as the faces you don't see are no longer rendered. This increases performance to a certain degree. Although, I would imagine it is more draining on the physics engine since these complex physics shapes take more computation time than box colliders.
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championbuilder is not online. championbuilder
Joined: 20 Jan 2009
Total Posts: 13544
08 Jul 2015 08:31 PM
what do you mean "faces you don't see are no longer rendered".
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Lineout is not online. Lineout
Joined: 06 Nov 2012
Total Posts: 684
08 Jul 2015 08:33 PM
If you have 2 bricks, It will render the the sides you "don't see". With a union, combining these two bricks will allow efficient render times as it does not need to produce as many faces. Like sparker said though, it will strain the physics engine more than box colliders.
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championbuilder is not online. championbuilder
Joined: 20 Jan 2009
Total Posts: 13544
08 Jul 2015 08:35 PM
Oh I thought he meant something else.
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sparker22 is not online. sparker22
Joined: 11 Mar 2010
Total Posts: 846
08 Jul 2015 09:01 PM
Personally I believe roblox needs to follow in Unity's footsteps. Colliders are a component in Unity. So I suppose roblox could implement a property since it doesn't have a component system. The property could give us different options like cone, mesh, box, sphere colliders etc. This way developers can balance physic accuracy and performance.
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