11.1 Properties of locus lines and surfaces
By right-clicking on a locus and then selecting ’Settings’ you can bring up the settings-dialogue.
Basically, three properties can be controlled:
- how many supporting points you have
- the starting point for the parameters
- the distance of the supporting points
Often you will have to experiment a bit to get good values. With a modern computer (1.5 GHz
cpu and 64 MB of video-ram) you can choose a value of 100 supporting points. Note
that in this case Archimedes computes 100x100 = 10 000 points for the surface. If you
use a value of 200, Archimedes has to compute 40 000 points, so be careful with that
In detail there are some more settings that can be made:
The function is incontinuous
- If you check this, a simple test for jumps is made.
Automatically adjust x/y to circles/segments/sliders:
- If one of the points driving the
locus is on a circle or segment or if the traced object is a circle or segment, you might
want to use the whole object. If so, check this option. For lines or objects on lines, this
option is initially disabled. If a locus is driven by a slider, this option will cause the
locus to adjust to the domain of the slider.