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import {
polygonContains as d3PolygonContains
} from 'd3-polygon';
export default function () {
//begin: internals
var clippingPolygon,
extent,
minX, maxX,
minY, maxY,
dx, dy;
//end: internals
///////////////////////
///////// API /////////
///////////////////////
function _random(d, i, arr, voronoiMapSimulation) {
var shouldUpdateInternals = false;
var x, y;
if (clippingPolygon !== voronoiMapSimulation.clip()) {
clippingPolygon = voronoiMapSimulation.clip();
extent = voronoiMapSimulation.extent();
shouldUpdateInternals = true;
}
if (shouldUpdateInternals) {
updateInternals();
}
x = minX + dx * voronoiMapSimulation.prng()();
y = minY + dy * voronoiMapSimulation.prng()();
while (!d3PolygonContains(clippingPolygon, [x, y])) {
x = minX + dx * voronoiMapSimulation.prng()();
y = minY + dy * voronoiMapSimulation.prng()();
}
return [x, y];
};
///////////////////////
/////// Private ///////
///////////////////////
function updateInternals() {
minX = extent[0][0];
maxX = extent[1][0];
minY = extent[0][1];
maxY = extent[1][1];
dx = maxX - minX;
dy = maxY - minY;
};
return _random;
};