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DarkBASIC Professional Discussion / Maths for object grid snap

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BlackChaos
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Posted: 3rd Oct 2011 14:57
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I have coded a level editor and I need to snap to objects to a grid on the floor so they can be placed with more accuracy.

So something like 3dsMax where you can see a grid and drag the objects over to snap them into position.


Thankx

bchaos101
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IanM
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Posted: 3rd Oct 2011 15:26
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Just carry out an integer division by your grid-size, then multiply back up again.


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BlackChaos
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Posted: 4th Oct 2011 19:21
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Thanks .. alos what about showing gridlines without using objects?? or do i have to use a textured plane?

bchaos101
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WLGfx
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Posted: 4th Oct 2011 21:28
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There's a few available options: Un-textured matrix is in wireframe. Lots of planes in wireframe. Or a plain with a high res grid texture. The option I would possibly go for is the lots of planes (this can be put into a single object as limbs if needed). Depending on how big the grid required is you can also instance the object multiple times.

Mental arithmetic? Me? (That's for computers) I can't subtract a fart from a plate of beans!
Warning! May contain Nuts!
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Diggsey
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Posted: 4th Oct 2011 22:00
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Actually, this might work better:


IanM's code won't always snap to the nearest one.

[b]
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IanM
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Posted: 4th Oct 2011 22:09
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True - I neglected negatives too.

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BlackChaos
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Posted: 20th Oct 2011 12:50
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@Diggsey

sorry for the late reply.
Quote: "
x# = floor(x# / GridSize + 0.5) * GridSize


"

Works great thanks

Check out my website -> Ameadus Project <- Over 2,000 free textures
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