Box2D setMass

totebo

Hey,

I'm trying to set the mass on a dynamic body in Box2D. I do this by calculating density for each fixture when I create it. This works fine for some fixture combos, but not others. When it works the mass is the same, regardless of the size of the object (which is the purpose of this). When it doesn't work the mass differs wildly.

Is there a different way of setting mass? A body:setMass() method would be awesome of course, but such luxuries don't appear to exist.

Found this, but probably not applicable to Gideros:
http://box2d.org/forum/viewtopic.php?t=684

Cheers,

Niclas

HubertRonald

@tobedo
I remember wanting to do something like that change an object to dynamic to static or kinetic once created: Change Body Properties

So I think, it would be necessary to go into detail to that because the truth I don't write Lua since 2.5 years ago... And yeah! today @SinisterSoft made me remember that

local a.b = 4; Print (a) = nil (because I first have to define a = {})

I think that once I start to recover my practice in Lua I could go further with this

Cheers

totebo

Thanks! I've given up on this for the time being, and I'm trying to adjust all impulses to move the body accordingly instead.