mirror of
https://github.com/Pomax/BezierInfo-2.git
synced 2025-10-03 11:31:52 +02:00
90 lines
2.2 KiB
JavaScript
90 lines
2.2 KiB
JavaScript
var React = require("react");
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var Locale = require("../../../lib/locale");
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var locale = new Locale();
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var page = "tightbounds";
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var TightBounds = React.createClass({
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getDefaultProps: function() {
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return {
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title: locale.getTitle(page)
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};
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},
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setupQuadratic: function(api) {
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var curve = api.getDefaultQuadratic();
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api.setCurve(curve);
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},
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setupCubic: function(api) {
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var curve = api.getDefaultCubic();
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api.setCurve(curve);
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},
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align: function(points, line) {
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var tx = line.p1.x,
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ty = line.p1.y,
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a = -Math.atan2(line.p2.y-ty, line.p2.x-tx),
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cos = Math.cos,
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sin = Math.sin,
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d = function(v) {
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return {
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x: (v.x-tx)*cos(a) - (v.y-ty)*sin(a),
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y: (v.x-tx)*sin(a) + (v.y-ty)*cos(a),
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a: a
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};
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};
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return points.map(d);
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},
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// FIXME: I'm not satisfied with needing to turn a bbox[] into a point[],
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// this needs a bezier.js solution, really, with a call curve.tightbbox()
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transpose: function(points, angle, offset) {
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var tx = offset.x,
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ty = offset.y,
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cos = Math.cos,
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sin = Math.sin,
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v = [points.x.min, points.y.min, points.x.max, points.y.max];
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return [
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{x: v[0], y: v[1] },
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{x: v[2], y: v[1] },
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{x: v[2], y: v[3] },
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{x: v[0], y: v[3] }
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].map(p => {
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var x=p.x, y=p.y;
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return {
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x: x*cos(angle) - y*sin(angle) + tx,
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y: x*sin(angle) + y*cos(angle) + ty
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};
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});
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},
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draw: function(api, curve) {
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api.reset();
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var pts = curve.points;
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var line = {p1: pts[0], p2: pts[pts.length-1]};
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var apts = this.align(pts, line);
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var angle = -apts[0].a;
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var aligned = new api.Bezier(apts);
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var bbox = aligned.bbox();
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var tpts = this.transpose(bbox, angle, pts[0]);
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api.setColor("#00FF00");
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api.drawLine(tpts[0], tpts[1]);
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api.drawLine(tpts[1], tpts[2]);
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api.drawLine(tpts[2], tpts[3]);
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api.drawLine(tpts[3], tpts[0]);
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api.setColor("black");
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api.drawSkeleton(curve);
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api.drawCurve(curve);
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},
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render: function() {
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return <section>{ locale.getContent(page, this) }</section>;
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}
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});
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module.exports = TightBounds;
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