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🚧 Bin packing integration

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This commit is contained in:
Joost De Cock 2018-08-01 18:18:29 +02:00
parent 6f52ccfd2e
commit 9a60dc5756
6 changed files with 130 additions and 2 deletions
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38
src/path.js
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@ -1,9 +1,12 @@
import attributes from "./attributes";
import point from "./point";
import Bezier from "bezier-js";
import { pathOffset, pathLength } from "./utils";
function path() {
this.render = true;
this.topLeft = false;
this.bottomRight = false;
this.attributes = new attributes();
this.ops = [];
}
@ -114,4 +117,39 @@ path.prototype.end = function() {
if (op.type === "close") return this.start();
else return op.to;
};
/** Finds the bounding box of a path */
path.prototype.boundary = function() {
if (this.topLeft) return this; // Cached
let current;
let topLeft = new point(Infinity, Infinity);
let bottomRight = new point(-Infinity, -Infinity);
for (let i in this.ops) {
let op = this.ops[i];
if (op.type === "move" || op.type === "line") {
if (op.to.x < topLeft.x) topLeft.x = op.to.x;
if (op.to.y < topLeft.y) topLeft.y = op.to.y;
if (op.to.x > bottomRight.x) bottomRight.x = op.to.x;
if (op.to.y > bottomRight.y) bottomRight.y = op.to.y;
} else if (op.type === "curve") {
let bb = new Bezier(
{ x: current.x, y: current.y },
{ x: op.cp1.x, y: op.cp1.y },
{ x: op.cp2.x, y: op.cp2.y },
{ x: op.to.x, y: op.to.y }
).bbox();
if (bb.x.min < topLeft.x) topLeft.x = bb.x.min;
if (bb.y.min < topLeft.y) topLeft.y = bb.y.min;
if (bb.x.max > bottomRight.x) bottomRight.x = bb.x.max;
if (bb.y.max > bottomRight.y) bottomRight.y = bb.y.max;
}
if (op.to) current = op.to;
}
this.topLeft = topLeft;
this.bottomRight = bottomRight;
return this;
};
export default path;