Advanced spirograph drawing tool for Windows
 SpiroCharts is a Windows application that displays and saves Spirograph drawings. It's very easy to use. Just construct a Spirograph object selecting the parameters using the sliders. The spirograph will be displayed automatically. You can save the spirograph as a windows bitmap and copy the image to the clipboard... You are able to zoom all the image or an only a selected area of the image. Explore the image using the direction keys in the keyboard. Take a virtual journey and explore the minimal details of your own spirographical creations.
What is a Spirograph?
A Spirograph is formed by rolling a circle inside or outside of another circle. The pen is placed at any point on the rolling circle. If the radius of fixed circle is R, the radius of moving circle is r, and the offset of the pen point in the moving circle is O, then the equation of the resulting curve is defined by:
x = (R+r)*cos(t) - (r+O)*cos(((R+r)/r)*t)
y = (R+r)*sin(t) - (r+O)*sin(((R+r)/r)*t)
Where R,r, and O are defined below. The app allows you to create all the SpiroGraphs your heart desires by varying the values of R, r and O, as well
a) Radius1 (R) Radius of circle (equator) centered at the origin.
b) Radius2 (r) Radius of circle (bicycle wheel) centered at (R+r,0)
c) Position (O) Distance of Point (reflector) from the center of Circle2, the circle of radius r.
SpiroCharts draws a line between points defined by t and t+1. Then between the points defined by t+1 and t+2 and so on.
Registration
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