The logarithmic spiral, also known as the growth spiral, was first studied by Descartes in 1638 and Jakob Bernoulli. This spiral often appears in nature. Probably the most important aspect of the logarithmic spiral is that if we increase the angle ø by equal amounts, the distance r from the poles increases in equal ratios.
To draw a Logarithmic spiral, select the object from the Chart Objects Pane and drop it on to an open chart.
There are appearance aspects of this object that can be changed in the Properties Pane.
Color Changes the color of the object.
Smoothing Mode Sets the drawing type of this object. Default draws a normal line. Anti-alias draws a smoother line at the expense of drawing performance.
Width This sets the size of the pen used to draw the outline of this object. A larger number indicates a thicker line.
Transparency The level of transparency given to this object. Valid numbers are 0-255, where 0 is invisible or completely transparent and 255 indicates no transparency.
Sweep Angle Sets the angle of the end point of this spiral.
See Also