draw-ec-addition
Draw examples of elliptic curve addition using Asymptote
Note that this is more of what I used to draw a few things than a general tool.
Usage
asy -f pdf ec.asy
will produce a PDF file with a curve and whatever points or additions you've specified
To specify which points or additions to actually draw, modify the source between
/**** Start Configuration here ****/
...
/**** End Configuration here ****/
because I'm too lazy to read the Asymptote docs to see how to specify things on the command line.
Dependencies
You will need Asymptote and a working LaTeX installation. If you remove the use of LaTeX from the labels, you may be able to get away without LaTeX.
History (and excuses)
What you see here is hardly a model of good coding.
I just wanted to draw a couple of figures for a blog post. I did not set out to develop a general tool for drawing elliptic curve examples. And I haven't. The result isn't a tool that can nicely be used for other curves and other points. It is really just an illustration of how I did this. There is a lot of coding by "copy/paste", leading to horrible duplication.
Additionally, the "what to draw" mechanism is terribly inefficient. I actually draw everything, but what gets configured is whether things are drawn with an invisible pen.
It should be clear that this was also a "learn Asymptote as you go" task.