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full regeneration

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Pomax
2020-09-19 18:34:03 -07:00
parent ad872f83c5
commit 4c0e71cd4a
234 changed files with 1468 additions and 1376 deletions
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33
docs/chapters/pointvectors/pointvectors.js
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@@ -6,6 +6,7 @@ setup() {
curve = Bezier.defaultQuadratic(this);
} else {
curve = Bezier.defaultCubic(this);
// to show this off for Cubic curves we need to change some of the points
curve.points[0].x = 30;
curve.points[0].y = 230;
curve.points[1].x = 75;
@@ -25,24 +26,30 @@ draw() {
let t = i/10.0;
let p = curve.get(t);
let d = this.type === `quadratic` ? this.getQuadraticDerivative(t, pts) : this.getCubicDerivative(t, pts);
let m = sqrt(d.x*d.x + d.y*d.y);
d = { x: d.x/m, y: d.y/m };
let n = this.getNormal(t, d);
setStroke(`blue`);
line(p.x, p.y, p.x + d.x*f, p.y + d.y*f);
setStroke(`red`);
line(p.x, p.y, p.x + n.x*f, p.y + n.y*f);
setStroke(`black`);
circle(p.x, p.y, 3);
this.drawVectors(f, t, p, d);
}
curve.drawPoints();
}
drawVectors(f, t, p, d) {
let m = sqrt(d.x*d.x + d.y*d.y);
d = { x: d.x/m, y: d.y/m };
let n = this.getNormal(t, d);
// draw the tangent vector
setStroke(`blue`);
line(p.x, p.y, p.x + d.x*f, p.y + d.y*f);
// draw the normal vector
setStroke(`red`);
line(p.x, p.y, p.x + n.x*f, p.y + n.y*f);
// and the point these are for
setStroke(`black`);
circle(p.x, p.y, 3);
}
getQuadraticDerivative(t, points) {
let mt = (1 - t), d = [
{