## Resting this blog for now...

Touch and Go is now available on Amazon, Jonathan and Irini have done a brilliant job - it looks beautiful, my paper has a  lot of colour images, which makes reading it a lot less tedious.
http://www.amazon.co.uk/Leonardo-Electronic-Almanac-Vol-No/dp/1906897182/ref=sr_1_1?ie=UTF8&qid=1352891656&sr=8-1
You can get fee pdfs of all the papers here:
http://www.leoalmanac.org/vol18-no3-touch-and-go/

## Monday, 1 October 2012

### nDinsky an instrument

nDinsky an instrument, screen shots, no sounds yet!

## Saturday, 29 September 2012

### Interactive Hypotrochoid

I've just written an Interactive Hypotrochoid program to play with here:

http://www.dareinteractive.com/hypo/index.html

Looks like this:

Code:

/**
Dare 2012 Interactive Hypotrochoids,
move mouse around to experiment with the
parameters of this equation, press mouse to re-set.
very much derived from Archim v2.1
code here:
http://www.archimy.com/examples/2d-ellipse.html
**/

//z must be zero
float z = 0.0;

//t-parameter
float tmin = 0.0;
float tmax = 3.0*PI;//6.0*PI;
float tgrid =120.0;//400.0;

//Constant
float a;// = 5.0;
float b;// = 3.0;
float d;// = 5.0;
float k, m;

void setup() {
size(600, 600);
background(0);
}

void draw() {

translate(width/2, height/2);
tmin++;
tmax++;

a = mouseX%width/3;
d = mouseX%height/3;
b = d/6;
k = a - b;
m = (a - b) / b;

//Calculations
float x = k * cos(tmin) + d * cos(m * tmin);
float y = k * sin(tmax) - d * sin(m * tmax);
noStroke();
fill(120+mouseY%255, mouseY%255, 120+mouseX%255, 220);
ellipse(x, y, 5, 5);
}

void mousePressed() {
setup();
}

### Hypotrochoids again

Hypotrochoid is a curve traced by a point attached to a circle of radius r rolling around the inside of a fixed circle of radius R, where the point is a distance d from the center of the interior circle...

Processing code:

/**

## Archim v2.1

code here:
http://www.archimy.com/examples/2d-ellipse.html

change a, b, d for dramatic changes in scale, try
float a = 5.0; //5.0 original values
float b = 3.0;//3.0
float d = 5.0;//5.0

try:
float a = 15.0*2; //5.0
float b = 1.0*2;//3.0
float d = 15.0*2;//5.0

*/
//z must be zero
float z = 0.0;

//t-parameter
float tmin = 0.0;
float tmax = 6.0*PI;//6.0*PI; /*try differant values here */
float tgrid = 400.0;//400.0;

/*Constants, affect scale and form hugely */
float a = 70.0; //5.0
float b =  -6.0;//3.0
float d = 70.0;//5.0
float k, m;

void setup() {
size(500, 500);
background(0);
}

void draw() {

translate(width/2, height/2);
tmin++;
tmax++;
k = a - b;
m = (a - b) / b;

//Calculations
float x = k * cos(tmin) + d * cos(m * tmin);
float y = k * sin(tmax) - d * sin(m * tmax);
noStroke();
fill(123, 0, 255, 120);
ellipse(x, y, 12, 12);
}

This site here provided some code in Archim v2.1 which I adapted for Processing and experimented with the parameters of the equation:
http://www.archimy.com/examples/2d-hypotrochoid.html

## Sunday, 16 September 2012

### Prism installation V&A

Amongst these visualisations projected onto Keiichi Matsuda's prism structure is one of mine for air quality in London. The installation is inside the tallest cupola of the V&A. there was a nice photo of it on the BBC News website yesterday.

## Monday, 3 September 2012

### Last variation

Last variation on the forthcoming Prism designs I hope, Sulphur Dioxide, Ozone and Nitrogen Dioxide levels in central London

## Monday, 27 August 2012

Introduction to Skype Code and Shouting, Shabina Aslam and Eleanor Dare