Comments on: How to create concave polygons

By: Alex

Alex — Sat, 02 Aug 2008 20:11:22 +0000

ah ok, good to hear you figured it out .

By: Leonard

Leonard — Thu, 31 Jul 2008 00:48:43 +0000

Yet again, found the problem minutes after… I was getting the rotation of the Ragdoll (Its torso) at the beggining, not in a method which seemed to break it…

Field Rotation:Int = MathHelper.ToDegrees(RagdollTorso.GetRotation())

Then returning it in a method, the GetRotation() should have been called inside the method…

By: Leonard

Leonard — Thu, 31 Jul 2008 00:31:10 +0000

Hey, ive tried to make my own type (TRagdoll) that goes in the DemoShare and then included into the Engine, every time i try to put it into a simulation using:

Global Ragdoll:TRagdoll = TRagdoll.Create(Centre)
Ragdoll.Load

I get an Memory Exception Error, Any ideas what this could be caused by? If you need i could send you a copy of the Type’s file…

P.S Yes i have set up Methods for creating the type and for Loading it (Drawing it too, but i havent actually used that yet)

By: Leonard

Leonard — Sat, 26 Jul 2008 15:24:12 +0000

Ah, gotcha… Thanks anyway, I guess i could find someway to save the textures made to a JPG or something and edit in some more details myself.

By: Alex

Alex — Sat, 26 Jul 2008 05:39:04 +0000

Adding support for outlining arbitrary polygon’s wasn’t as trivial as the other helper functions, so for the sake of time/performance I left the polygon function as is. Again, those functions were created more for debug purposes to help development along.

As for your question, I don’t have the code in front of me at the moment but I believe it would be something like similar to this:

local points:Vector2[] = new Vector2[3]
points[0] = Vector2.create(0,-10)
points[1] = Vector2.create(5,10)
points[2] = Vector2.create(-5,10)

local triangleImage:TImage = TDrawingHelper.CreatePolygonTexture(points,TColor.White)

By: Leonard

Leonard — Mon, 21 Jul 2008 09:48:52 +0000

Why only one colour? And no line width?
So how would i use this to make a Triangle texture with the coordinates:
0, -10
5, 10
-5, 10

By: Alex

Alex — Mon, 21 Jul 2008 02:51:29 +0000

Hi Leonard,
TPhysicsSimulatorView and TDrawingHelper are not core parts of the farseer physics engine, they were used to help the development of the demo application. As such, they are not included in the actual module. To use them you’d have to include them manually in your own code.

Also the function signature for polygon textures is this:

Function CreatePolygonTexture:TImage(points:Vector2[], color:TColor)

By: Leonard

Leonard — Mon, 21 Jul 2008 00:14:18 +0000

Finally found out how to get modules working on BMax lol, I tried using the Module version but it doesnt sem to allow TPhysicsSimulatorView or TDrawingHelper? Also, I posted this in the tutorial comments but, How do i make Polygon textures???

Ive tried things like:
TDrawingHelper.CreatePolygonTexture(CarVerts, TColor.White, TColor.Black, 3)
But, No dice?

By: Alex

Alex — Sat, 19 Jul 2008 17:34:15 +0000

You’re welcome

By: Leonard

Leonard — Sat, 19 Jul 2008 12:15:39 +0000

Nvm… Got it just this second lol

Was Using this sort of thing:
Pos:Vector2 = Box.GetPosition()
SetOrigin(Pos.X – 400, 0)

When i needed:
SetOrigin(400 – Pos.X, 0)

Thanks for your help