带坐标轴的几何画板

 

 

---
> id: demo

Here is a geopad with axes and coordinate system

    figure
      x-geopad(width=600 height=400 x-axis="-6,6,1" y-axis="-4,4,1" axes grid padding=5): svg
        circle.move.green(name="p" cx=2 cy=2)
        path.green(x="segment(point(0,0),p)")
        circle.red(x="complexRoot(p,3,0)" name="r0")
        circle.red(x="complexRoot(p,3,1)" name="r1")
        circle.red(x="complexRoot(p,3,2)" name="r2")
        path.red(x="polygon(r0,r1,r2)")

import {Complex, Point} from '@mathigon/fermat';
import {Step} from '../shared/types';


export function demo($step: Step) {
  $step.model.complexRoot = (p: Point, n: number, i: number) => {
    const c = new Complex(p.x, p.y);
    const root = c.root(n, i);
    return new Point(root.re, root.im);
  };
}

 

 

选自：https://github.com/mathigon/textbooks/tree/master/content/complex