Spiral by Centres and RadiiSpiral by Centres and Radii

Availability: Computations module.
Menu Selection: From the Computations task, select the Create/Spiral command and the Method/Centres and Radii command.
Functionality: two new end points
Controls:
Actions:
  • The OK Button creates the spiral object and two new end points.
  • Next
Notes:
  • elevation control
  • The maximum radius will be the radius for the "Large" Centre Point the minimum radius will be the radius for the "Small" centre point.
  • Both radii must be positive for a clockwise curve, or negative for an anticlockwise curve.
  • The spiral always starts at the large radius end.
  • The spiral created will be given the currently defined line attributes..
  • The new end point created will be given the attributes of the currently defined point attribute.