litan

case class LSystem(axiom: String, angle: Double, len: Int = 100, sf: Double = 0.6)(rules: PartialFunction[Char, String]) {
    var currVal = axiom
    var currGen = 0
    def evolve() {
        currGen += 1
        currVal = currVal.map { c =>
            if (rules.isDefinedAt(c)) rules(c) else c
        }.mkString.replaceAll("""\|""" , currGen.toString)
    }
    

litan

/*
 * Copyright (C) 2012 Lalit Pant <pant.lalit@gmail.com>
 *
 * The contents of this file are subject to the GNU General Public License
 * Version 3 (the "License"); you may not use this file
 * except in compliance with the License. You may obtain a copy of
 * the License at http://www.gnu.org/copyleft/gpl.html
 *
 * Software distributed under the License is distributed on an "AS
 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or

litan

clear()
setSpeed(fast)
setPenColor(darkGray)
repeat(18) {
    forward(100)
    right(100)
}

litan

Shape.clear()
def r(w: Int, h: Int) = Shape.rectangle(w, h) .outlined(black)
def sq(l: Int) = r(l, l)
def vgap(l: Int) = Shape.gap(0, l)
def hgap(l: Int) = Shape.gap(l, 0)

val eyes = sq(50) beside hgap(100) beside sq(50) filled(lightGray)
val nose = r(30, 100) .filled(orange)
val mouth = r(100, 20) .filled(red)

litan

Shape.clear()
setBackgroundH(black, blue)
val (height, breadth) = (100, 20)
def stem = Shape.rectangle(breadth, height).outlined(lightGray).filled(lightGray)
def tree(n: Double): Shape = {
    if (n == 0)
        stem
    else
        // on2 places shapes on each other without centering
        tree(n-1) .rotated(30) .scaled(0.7) .translated(0, height * 0.95) on2

litan

// a simple game - you need to keep the rectangle within the canvas
// the rectangle moves and grows in size; its speed goes up as its size increases
// you can rotate it by pressing the 'P' key; you can make it smaller by clicking on it
cleari()
drawStage(black)
val rect = fillColor(lightGray) * penColor(lightGray) -> PicShape.rect(40, 60)
draw(rect)
animate { 
    rect.translate(1, 0)
    rect.scale(1.001)

litan

// #include ~/kojo-includes/ka-bridge.kojo

def setup() {
    pinMode(2, INPUT)
    pinMode(3, OUTPUT)
    pinMode(4, OUTPUT)
    pinMode(5, OUTPUT)
}

def loop() {

litan

Various versions of the "hunted" game

• Imperative
• Structured
• Functional (mostly)
• Object Oriented (OO)
• OO-functional
• Functional (pure)