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 Generating random shapes  (Read 3878 times) 0 Members and 1 Guest are viewing this topic.
appel

JGO Wizard

Medals: 80
Projects: 4

I always win!

 « Posted 2005-12-19 02:52:48 »

Hello,

I'm trying to make a game for the 4k competition, and what I want to do is to generate a random shape object that I can then fill with whatever.

I do have some java classes that can generate a random shape, but they are all huge. Is there any way of generating a random shaped object with a very few lines of code?

The shape needs to be pretty smooth, and edges curved.

Example (what I did in photoshop):
swpalmer

JGO Coder

Exp: 12 years

Where's the Kaboom?

 « Reply #1 - Posted 2005-12-19 03:04:36 »

The first thing that comes to mind is to use polar coordinates to sweep around a circle in 3--10 steps but vary the radius by a random amount.  Use a GeneralPath and "curveTo" to get it smoothed out.

appel

JGO Wizard

Medals: 80
Projects: 4

I always win!

 « Reply #2 - Posted 2005-12-19 03:12:36 »

Ahh....sounds like a good idea.
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Ask_Hjorth_Larsen

Junior Devvie

Java games rock!

 « Reply #3 - Posted 2005-12-20 01:13:04 »

You can generate quite nice results automatically by simply plotting a fourier series over its entire period, i.e.

 1  2  3  4  5  6  7 `                 N               -----                \    /r1(n) cos(n t)   r2(n) sin(n t)\                 )   |-------------- + --------------|                /    |          2                2   |               ----- \   (n + 1)          (n + 1)    /               n = 0`

plotted from t = 0..2 pi in polar coordinates.

The (n+1)^2 in the denominators have been selected to increase the smoothness of the graph (so violently oscillating terms have small impact).
Ask_Hjorth_Larsen

Junior Devvie

Java games rock!

 « Reply #4 - Posted 2005-12-20 01:18:02 »

Oh, the r1(n) and r2(n) are meant to be random numbers between 0 and 1.
appel

JGO Wizard

Medals: 80
Projects: 4

I always win!

 « Reply #5 - Posted 2005-12-20 08:41:37 »

Thank you, that will come in handy
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