3 ms·
When moving circle is inside, its called Hypotrochoid https://en.wikipedia.org/wiki/Hypotrochoid https://en.wikipedia.org/wiki/Hypotrochoid When moving circle
by sytelus 8y ago
When moving circle is inside, its called Hypotrochoid https://en.wikipedia.org/wiki/Hypotrochoid https://en.wikipedia.org/wiki/Hypotrochoid
When moving circle is outside, its called Epitrochoid https://en.wikipedia.org/wiki/Epitrochoid https://en.wikipedia.org/wiki/Epitrochoid
The difference between two is sign for radius for moving circle.
Overall this is just ploting parametric equations in 2D in Python using complex number trick.
- ValleyOfTheMtns 8y agoStill seems like a kind of magic to non-magic folk like me i.e. a muggle.
- vram22 8y ago>When moving circle is outside, its called Epitrochoid >https://en.wikipedia.org/wiki/Epitrochoid https://en.wikipedia.org/wiki/Epitrochoid The combustion chamber of the Wankel engine is an epitrochoid. (From the above Wikipedia link.) I had read up about Wankel (and also the more conventional internal combustion) engines as a kid. Thought the Wankel engine idea was cool. It has both pros and cons. https://en.wikipedia.org/wiki/Wankel_engine https://en.wikipedia.org/wiki/Wankel_engine