/*
NEJE DK-8-KZ is a low cost laser carver that uses 500x500 images instead of gcode.
Making a physical grid, we can calcuate how to engrave several objects at a time.
This sketch maks a grid on a 500x500 pixel image, so you can engave it on a 
cardboard to use as pattern.
 
This sketch builds on a prior work, "Untitled Sketch", created by [unnamed author]
http://sketchpad.cc/sp/pad/view/ro.LRZM2F1IbFm/rev.318
*/
 
// Pressing Control-R will render this sketch.
PFont MyFont;
 
    int width=500;
    int height=500;
    int steps=10;
    int stepw=width/steps;
    int steph=height/steps;
 
void setup() {  // this is run once.   
    size(width,height);  
    colorMode(RGB);
    background(255,255,255);
    stroke(0,0,0);
    MyFont=createFont("Courier",10)
    textFont(MyFont);
//    textSize(20);
    fill(0,0,0);
    /* I tried with 1, but grid is oo thin or you to see it */
    strokeWeight(3);
      
    textAlign(CENTER);
    for (int f=stepw;f<=(width-stepw);f+=stepw){
        line (f,steph,f,height-steph);
        text(str(f),f,steph);
    }
    textAlign(RIGHT);
    for (int g=steph;g<=(height-steph);g+=steph){
        line (stepw,g,width-stepw,g);
        if (stepw!=g) {
                text(str(g),stepw,g);
        }
    }
saveFrame("grid.gif");    
}