usedPolygon = usePolygonInterpolation
? interpolatePolygon(polygon, gridSize)
: polygon
gridPointsInPolygon = grid.filter((point) => {
if (robustPointInPolygon.default(polygon, point) == -1) {
return true;
}
})
usedPolygonAndGrid = useGrid
? [...usedPolygon, ...gridPointsInPolygon]
: usedPolygon
delaunatorTriangles = {
const delaunator = Delaunator.from(usedPolygonAndGrid)
const coordinates = [];
for (let i = 0; i < delaunator.triangles.length; i += 3) {
coordinates.push([
usedPolygonAndGrid[delaunator.triangles[i]],
usedPolygonAndGrid[delaunator.triangles[i + 1]],
usedPolygonAndGrid[delaunator.triangles[i + 2]]
]);
}
return coordinates;
}
edgeIndices = {
const indices = [];
for (let i = 0; i < usedPolygon.length - 1; i++) {
indices.push([i, i + 1]);
}
indices.push([usedPolygon.length - 1, 0]);
return indices;
}
constrainautorTriangles = {
if (polygon.length < 3) {
return [];
}
const del = Delaunator.from(usedPolygonAndGrid);
const con = new Constrainautor(del, edgeIndices);
const coordinates = [];
for (let i = 0; i < con.del.triangles.length; i += 3) {
coordinates.push([
usedPolygonAndGrid[con.del.triangles[i]],
usedPolygonAndGrid[con.del.triangles[i + 1]],
usedPolygonAndGrid[con.del.triangles[i + 2]]
]);
}
return coordinates;
}
insideTriangles = {
const coordinates = [];
for (let i = 0; i < constrainautorTriangles.length; i++) {
const triangleMidPoint = [
(1 / 3) * constrainautorTriangles[i][0][0] +
(1 / 3) * constrainautorTriangles[i][1][0] +
(1 / 3) * constrainautorTriangles[i][2][0],
(1 / 3) * constrainautorTriangles[i][0][1] +
(1 / 3) * constrainautorTriangles[i][1][1] +
(1 / 3) * constrainautorTriangles[i][2][1]
];
if (robustPointInPolygon.default(polygon, triangleMidPoint) == -1) {
coordinates.push(constrainautorTriangles[i]);
}
}
return coordinates;
}
Purpose-built for displays of data
Observable is your go-to platform for exploring data and creating expressive data visualizations. Use reactive JavaScript notebooks for prototyping and a collaborative canvas for visual data exploration and dashboard creation.
