43 lines
927 B
JavaScript
43 lines
927 B
JavaScript
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"use strict";
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Object.defineProperty(exports, "__esModule", {
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value: true
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});
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exports.checkCollinear = checkCollinear;
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exports.getDistance = getDistance;
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exports.moveTo = moveTo;
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function int(value) {
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return parseInt(value, 10);
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}
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/**
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* https://en.wikipedia.org/wiki/Collinearity
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* x=(x1+x2)/2
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* y=(y1+y2)/2
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*/
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function checkCollinear(p0, p1, p2) {
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return int(p0.x + p2.x) === int(2 * p1.x) && int(p0.y + p2.y) === int(2 * p1.y);
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}
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function getDistance(p1, p2) {
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return Math.sqrt(Math.pow(p2.x - p1.x, 2) + Math.pow(p2.y - p1.y, 2));
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}
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function moveTo(to, from, radius) {
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var vector = {
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x: to.x - from.x,
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y: to.y - from.y
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};
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var length = Math.sqrt(vector.x * vector.x + vector.y * vector.y);
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var unitVector = {
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x: vector.x / length,
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y: vector.y / length
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};
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return {
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x: from.x + unitVector.x * radius,
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y: from.y + unitVector.y * radius
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};
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}
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//# sourceMappingURL=math.js.map
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