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Locus
The Locus tool creates a set of objects defined by the movement of a point along a path. When you
select a point on a path (object), the locus is completely constructed and is considered a defined
object. As such, points can be attached. When you modify an object that defines a locus, the locus
is recalculated and continuously displayed to show the effects of the modifications.
With defaults set, a locus is constructed with 30 (Macintosh) or 50 (Windows, DOS) objects equally
spaced along the designated path. You can change this setting using Preferences in the Options menu.
Choices for connecting locus points and constructing the envelope of a line are also available under
Preferences . See "Options Menu" in the chapter "Using the Menus" for more information. As an
alternate method for changing the number of objects that define the locus, you can select the locus
and then press + or - to increase or decrease the number of objects that define the displayed locus.
Creating a locus
1.
Select Locus from the Construct toolbox.
2.
Select the object for the locus.
3.
Select a point that lies on a path.
Note: A path is any defined object on which a point
can be placed.
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© 1997, 1999 Texas Instruments Incorporated
Preconstructed objects.
Select the object.
Select a point on a path.
This point
As its center travels around the first circle, the locus of a
second circle through a point on a circle is constructed.
Chapter 7: Using the Construct Toolbox
This circle
7-11
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