[alogo] Simple locus

A simple Geometric locus example
Point A moves on the fixed circle o1 .
C is the projection of A on the fixed line o2.
B is the projection of C on the diameter defined by the points O and A.

b is the curve representing the geometric locus of B.

[0_0] [0_1]

- Switch to the pick-move tool (CTRL+2).
- Pick point A and move it along o1. You see point B tracing exactly the path b.
- Switch to the selection tool (CTRL+1).
- Catch and modify the circle o1 or the line o2. You see b changing dynamically.

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