[alogo] Deltoid's basic figure

This is the basic figure of the Deltoid generated by a circle rolling inside another fixed circle with radius three times the radius of the rolling one. The various aspects and connexions of the deltoid with Wallace-Simson lines and orthopoles are discussed in Deltoid.html .

[0_0] [0_1] [0_2] [0_3]
[1_0] [1_1] [1_2] [1_3]
[2_0] [2_1] [2_2] [2_3]

The 17 controls can be set in two stages each: hidding/non-hidding. They result 215 = 32768 possible figures. Some of them are discussed in the file Deltoid.html . See there for references. Moving point (t) makes the circle with center Q roll into the circle passing through {A2,B2,C2} and generate the deltoid.

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