Spirograph Applet Details
-
- Radius1 (a)
- Radius of Circle 1, centered at
the origin.
-
- Radius2 (b)
- Radius of Circle 2, centered at
(R+r,0)
-
- Position (c)
- Distance of drawing point from
the center of Circle 2, the circle of radius r.
-
- Velocity
- Speed at which the SpiroGraph
is drawn, with 0 being the slowest and 10 being the fastest. Can be adjusted
while drawing is taking place. Sometimes half the fun is seeing your SpiroGraph
being drawn! Sometimes not!
-
- Resolution
- Controls how precisely the SpiroGraph
is drawn. For instance, with a Resolution of 360, the points
(x(t),y(t))
are plotted for t=0,1,2,3,4,5,...,359,360
degrees. With a Resolution
of 180, only the values of t=0,2,4,6,8,10,...,358,360
are used.
Be careful -- the larger the Resolution, the longer it will take to draw the
SpiroGraph. Normally, a value between 270 and 360 will be good enough. With
a small value of Radius2 (say Radius2=1), a small change in Resolution can
result in remarkably different SpiroGraphs.
-
- Hide/Show
- Changing the value of this button
will determine whether or not to display the circles/axes while drawing is
taking place. Note: SpiroGraphs are drawn much faster if you "Hide"
the circles/axes.
-
- Clear
- This button will clear the screen
of all SpiroGraphs.
-
- Reset
- This button stops the current
SpiroGraph and returns Circle 2 and the drawing point to their original positions.
-
- Draw/Pause/Resume
- These buttons should be self explanatory.
-
- Red/Green/Blue
- You can adjust the values of these
sliders to draw your SpiroGraph in virtually any color you like!
© 1997 David P. Little