Creative Programming 2010

Hello

I start playing with the program. Basically, you state several rules, calling basic shapes (primitives), that could be recursive, and can be called with a given probability. For instance:

[code]
//tell the program how to begin
startshape Branch
//
rule Branch{
SQUARE{ h 30 sat 0.61 b 0.95} //render an square with hue, saturation, brightness
Branch{s 0.95 h 2 y 0.9 r 5 x -0.05}
/*
call Branch recursively, scaling each time 0.95, shifting hue by 2,
translating y by 0.9 units, rotate 5º, and translate x -0.05
*/
}
[/code]

The recursion stops when the shape scale reaches 0 units, this time. To change direction, we can add another rule, with the same name and different probabilities. The entire file will be:

[code]
startshape Branch
rule Branch 0.7{ //<--- probability
SQUARE{ h 30 sat 0.61 b 0.95}
Branch{s 0.95 h 2 y 0.9 r 5 x -0.05}
}
rule Branch 0.76{
SQUARE{ h 30 sat 0.61 b 0.95}
Branch{s 0.95 h 2 y 0.9 r -5 x 0.05}
}
[/code]

And to finish, the typical fractal (or something alike :P)

[code]
startshape Tree

rule Tree 0.9{
Branch{}
Tree[ r 25 x 3 y 6 s 0.9]
Tree[ r -25 x -1.8 y 4 s 0.9]
}
//ensures recursion finish
rule Tree 0.5{}
}
[/code]

A few things to note: square braces [] tells the program to respect
that order of operations. The second rule controls the amount of objects
rendered (because I have an old computer :P). And, each time we render, we'll
get a new drawing, as the rules have probabilities. But contextFree stores each
run with 3 letters, so we can recover it later.

Shall we put images here?