Generating random shapes

Java 2D
#1

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):

http://www.private.is/arni/randshape.gif

#2

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.

#3

Ahh…sounds like a good idea.

#4

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



                 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).

#5

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

#6

Thank you, that will come in handy :slight_smile: