/*
* Creative Coding
* Week 2, 04 – The Clocks!
* by Indae Hwang and Jon McCormack
* Copyright (c) 2014 Monash University
*
* This program draws a grid of circular “clocks”, whose hands move according to the elasped time.
* The higher the clock number the faster it moves, the first clock takes 1 min to go all the way around.
* The function “movingCircle” is used to draw each clock. It is passed the position, size and hand angle
* as arguments.
*
* Updated version: this updated version correctly sets margin and gutter distances
*
*/

//Amended by Brenda O’Neill 17th August, 2015

void setup() {
size(600, 600);
background(180);
rectMode(CENTER);
ellipseMode(CENTER);
noStroke();
}
void draw() {
background(180);
noStroke();

int num = 5; // the number of rows and columns
int margin = 40; // margin between the edges of the screen and the circles

float gutter = 10; //distance between each cell
float cellsize = ( width – (2 * margin) – gutter * (num – 1) ) / num; // size of each circle

int circleNumber = 0; // counter

for (int i=0; i<num; i++) { // column in y
for (int j=0; j<num; j++) { // row in x
++circleNumber;

float tx = margin + cellsize/2 + (cellsize + gutter) * j;
float ty = margin + cellsize/2 + (cellsize + gutter) * i;

//used the modulus operator here to see if there was any remainder when divided by 2.
//if circleNumber is odd then… else…
if(circleNumber%2 !=0)
{
movingCircle(tx, ty, cellsize, circleNumber * TWO_PI * millis() / 60000.0); //function call to movingCircle()
}
else
{
movingCircle2(tx, ty, cellsize, circleNumber * TWO_PI * millis()/ 60000.0); //function call to movingCircle2()
}
}}
}//end of draw

void movingCircle(float x, float y, float size, float angle) {

// calculate endpoint of the line
float tempX = x + (size / 2) * cos(angle);
float tempY = y + (size / 2) * sin(angle);

stroke(0);
strokeWeight(1);
fill(140, 180);
ellipse(x, y, size, size); // circle
stroke(255, 0, 0);
line(x, y,tempX, tempY); //red line
}
void movingCircle2(float x, float y, float size, float angle) {
//changes made here for square and line going in opposite direction
// calculate endpoint of the line
//float tempX = x + (size / 2) * cos(angle); //original code

float tempY = y + (size / 2) * cos(angle);//played around with these and changed from sin to cos

//float tempY = y + (size / 2) * sin(angle); //original code
float tempX = x + (size / 2) * sin(angle);

stroke(0);
strokeWeight(1);
fill(140, 180);
//ellipse(x, y, size, size); // circle commented out
rect(x, y, size, size);//rectangle drawn instead
stroke(255, 0, 0);
line(x, y,tempX, tempY); //red line
}

Clock Exercise