Comments on: Drawing circles on the fly in Box2D

By: David

David — Fri, 15 May 2009 03:34:34 +0000

I’ve managed to implement a way of drawing triangles on the fly if you’d like to see it :). It’s fairly convoluted and I’m far from the best coder at Flash, but it still draws triangles.

David

By: Basic Filler engine with Box2D - part 1 : Emanuele Feronato

Basic Filler engine with Box2D - part 1 : Emanuele Feronato — Mon, 23 Feb 2009 17:16:11 +0000

[...] code is mainly taken from Drawing circles on the fly in Box2D – fleshMaker version, but uses movieclips for the balls (so I removed the debug draw) and has a [...]

By: anlik

anlik — Fri, 09 Jan 2009 08:18:40 +0000

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By: Nathan

Nathan — Thu, 08 Jan 2009 23:04:50 +0000

cool, but the second one has false advertising. The ghost is larger than the circle it produces :)

By: Michael Beech

Michael Beech — Thu, 08 Jan 2009 22:47:02 +0000

Yeah I created my circles lazily (too quick ‘casue I was supposed to be working) and didn’t account for the m_phys_scale. If you put Fuori dal Cerchio’s radius calculation in it work as expected.

var radius:Number = Math.sqrt((e.localX – initX)*(e.localX – initX) + (e.localY – initY)*(e.localY – initY));
AddCircle(initX, initY, radius);

Good learning experience :)

By: vitaLee

vitaLee — Thu, 08 Jan 2009 20:51:03 +0000

i’m traying it by placing 3 points on the stage through mouse clicks.
then i take the first as starting point and calculate the distance between it and the other two (x,y).
with all that data I set the polygon vertices.

By: Monkios

Monkios — Thu, 08 Jan 2009 20:25:29 +0000

Are you trying to create equilateral or fixed angle triangles or are you trying to make them with an array of different angles ?

As I see it, it would be much easier the first ones on the fly.

By: Francis Bourre

Francis Bourre — Thu, 08 Jan 2009 16:50:43 +0000

Hello !
Nice to see your works. I did some in the same way, you can check it on my blog:

http://blog.tweenpix.net/2009/01/08/3d-and-physics-with-papervision-3d-and-box2d/

keep up the good work !

By: vitaLee

vitaLee — Thu, 08 Jan 2009 15:43:51 +0000

yes i did.
maybe it has something to do with the fact that one of my vertices is set as (0,0).
when i try to make a triangle in certain position it doesn’t work. when i try to duplicate the same triangle starting from the same angle i did in the previous but then changing the order for setting the other 2 points it works.
i’ve been trying to find out whats the reason but in vain.
i can do some research but thought that it would be more fun to dicuss it here.
what about such discussion ?
;)

By: Emanuele Feronato

Emanuele Feronato — Thu, 08 Jan 2009 14:42:16 +0000

did you set density?