@polygonjs/plugin-mapbox
Version:
Mapbox plugin for the 3D engine https://polygonjs.com
43 lines (42 loc) • 1.91 kB
JavaScript
import { Vector3 } from "three";
import { Triangle } from "three";
import { CoreMath } from "@polygonjs/polygonjs/dist/src/core/math/_Module";
import { CoreGeometryBuilderMesh } from "@polygonjs/polygonjs/dist/src/core/geometry/builders/Mesh";
export class MapboxPlaneFrustumController {
constructor(node) {
this.node = node;
this._triangle_a = new Triangle();
this._triangle_b = new Triangle();
this._point_pos = new Vector3();
}
deleteOutOfView(geometry, core_geo, camera_node, transformer, plane_dimensions, segments_counts) {
const near_lng_lat_pts = camera_node.verticalNearLngLatPoints();
const far_lng_lat_pts = camera_node.verticalFarLngLatPoints();
if (!near_lng_lat_pts || !far_lng_lat_pts) {
return;
}
let delete_out_of_view_bound_pts = near_lng_lat_pts.concat(far_lng_lat_pts);
const delete_out_of_view_margin = Math.max(plane_dimensions.x / segments_counts.x, plane_dimensions.y / segments_counts.y);
return this._deleteOutOfView(core_geo, delete_out_of_view_bound_pts, delete_out_of_view_margin * 2);
}
_deleteOutOfView(core_geo, bound_pts, margin) {
const points = core_geo.points();
const positions = bound_pts.map((bound_pt) => new Vector3(bound_pt.lng, 0, bound_pt.lat));
this._triangle_a.a.copy(positions[0]);
this._triangle_a.b.copy(positions[1]);
this._triangle_a.c.copy(positions[2]);
this._triangle_b.a.copy(positions[2]);
this._triangle_b.b.copy(positions[3]);
this._triangle_b.c.copy(positions[1]);
CoreMath.expand_triangle(this._triangle_a, margin);
CoreMath.expand_triangle(this._triangle_b, margin);
const kept_points = [];
for (let point of points) {
point.getPosition(this._point_pos);
if (this._triangle_b.containsPoint(this._point_pos)) {
kept_points.push(point);
}
}
return new CoreGeometryBuilderMesh().from_points(kept_points);
}
}