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transform.test.js
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transform.test.js
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import {test} from '../../util/test.js';
import Point from '@mapbox/point-geometry';
import Transform from '../../../src/geo/transform.js';
import LngLat from '../../../src/geo/lng_lat.js';
import {OverscaledTileID, CanonicalTileID} from '../../../src/source/tile_id.js';
import {fixedNum, fixedLngLat, fixedCoord, fixedPoint, fixedVec3, fixedVec4} from '../../util/fixed.js';
import {FreeCameraOptions} from '../../../src/ui/free_camera.js';
import MercatorCoordinate, {mercatorZfromAltitude} from '../../../src/geo/mercator_coordinate.js';
import {vec3, quat} from 'gl-matrix';
import LngLatBounds from '../../../src/geo/lng_lat_bounds.js';
import {degToRad} from '../../../src/util/util.js';
test('transform', (t) => {
t.test('creates a transform', (t) => {
const transform = new Transform();
transform.resize(500, 500);
t.equal(transform.unmodified, true);
t.equal(transform.maxValidLatitude, 85.051129);
t.equal(transform.tileSize, 512, 'tileSize');
t.equal(transform.worldSize, 512, 'worldSize');
t.equal(transform.width, 500, 'width');
t.equal(transform.minZoom, 0, 'minZoom');
t.equal(transform.minPitch, 0, 'minPitch');
t.equal(transform.bearing, 0, 'bearing');
t.equal(transform.bearing = 1, 1, 'set bearing');
t.equal(transform.bearing, 1, 'bearing');
t.equal(transform.bearing = 0, 0, 'set bearing');
t.equal(transform.unmodified, false);
t.equal(transform.minZoom = 10, 10);
t.equal(transform.maxZoom = 10, 10);
t.equal(transform.minZoom, 10);
t.deepEqual(transform.center, {lng: 0, lat: 0});
t.equal(transform.maxZoom, 10);
t.equal(transform.minPitch = 10, 10);
t.equal(transform.maxPitch = 10, 10);
t.equal(transform.size.equals(new Point(500, 500)), true);
t.equal(transform.centerPoint.equals(new Point(250, 250)), true);
t.equal(transform.scaleZoom(0), -Infinity);
t.equal(transform.scaleZoom(10), 3.3219280948873626);
t.deepEqual(transform.point, new Point(262144, 262144));
t.equal(transform.height, 500);
t.deepEqual(fixedLngLat(transform.pointLocation(new Point(250, 250))), {lng: 0, lat: 0});
t.deepEqual(fixedCoord(transform.pointCoordinate(new Point(250, 250))), {x: 0.5, y: 0.5, z: 0});
t.deepEqual(fixedPoint(transform.locationPoint(new LngLat(0, 0))), {x: 250, y: 250});
t.deepEqual(transform.locationCoordinate(new LngLat(0, 0)), {x: 0.5, y: 0.5, z: 0});
t.deepEqual(fixedLngLat(transform.pointLocation3D(new Point(250, 250))), {lng: 0, lat: 0});
t.deepEqual(fixedCoord(transform.pointCoordinate3D(new Point(250, 250))), {x: 0.5, y: 0.5, z: 0});
t.deepEqual(fixedPoint(transform.locationPoint3D(new LngLat(0, 0))), {x: 250, y: 250});
t.end();
});
t.test('does not throw on bad center', (t) => {
const transform = new Transform();
transform.resize(500, 500);
transform.center = {lng: 50, lat: -90};
t.end();
});
t.test('setLocationAt', (t) => {
const transform = new Transform();
transform.resize(500, 500);
transform.zoom = 4;
t.deepEqual(transform.center, {lng: 0, lat: 0});
transform.setLocationAtPoint({lng: 13, lat: 10}, new Point(15, 45));
t.deepEqual(fixedLngLat(transform.pointLocation(new Point(15, 45))), {lng: 13, lat: 10});
t.end();
});
t.test('setLocationAt tilted', (t) => {
const transform = new Transform();
transform.resize(500, 500);
transform.zoom = 4;
transform.pitch = 50;
t.deepEqual(transform.center, {lng: 0, lat: 0});
transform.setLocationAtPoint({lng: 13, lat: 10}, new Point(15, 45));
t.deepEqual(fixedLngLat(transform.pointLocation(new Point(15, 45))), {lng: 13, lat: 10});
t.end();
});
t.test('has a default zoom', (t) => {
const transform = new Transform();
transform.resize(500, 500);
t.equal(transform.tileZoom, 0);
t.equal(transform.tileZoom, transform.zoom);
t.end();
});
t.test('set fov', (t) => {
const transform = new Transform();
transform.fov = 10;
t.equal(transform.fov, 10);
transform.fov = 10;
t.equal(transform.fov, 10);
t.end();
});
t.test('lngRange & latRange constrain zoom and center', (t) => {
const transform = new Transform();
transform.center = new LngLat(0, 0);
transform.zoom = 10;
transform.resize(500, 500);
transform.lngRange = [-5, 5];
transform.latRange = [-5, 5];
transform.zoom = 0;
t.equal(transform.zoom, 5.135709286104402);
transform.center = new LngLat(-50, -30);
t.same(transform.center, new LngLat(0, -0.0063583052861417855));
transform.zoom = 10;
transform.center = new LngLat(-50, -30);
t.same(transform.center, new LngLat(-4.828338623046875, -4.828969771321582));
t.end();
});
t.test('maxBounds should not jump to the wrong side when crossing 180th meridian (#10447)', (t) => {
t.test(' to the East', (t) => {
const transform = new Transform();
transform.zoom = 6;
transform.resize(500, 500);
transform.lngRange = [160, 190];
transform.latRange = [-55, -23];
transform.center = new LngLat(-170, -40);
t.ok(transform.center.lng < 190);
t.ok(transform.center.lng > 175);
t.end();
});
t.test('to the West', (t) => {
const transform = new Transform();
transform.zoom = 6;
transform.resize(500, 500);
transform.lngRange = [-190, -160];
transform.latRange = [-55, -23];
transform.center = new LngLat(170, -40);
t.ok(transform.center.lng > -190);
t.ok(transform.center.lng < -175);
t.end();
});
t.test('longitude 0 - 360', (t) => {
const transform = new Transform();
transform.zoom = 6;
transform.resize(500, 500);
transform.lngRange = [0, 360];
transform.latRange = [-90, 90];
transform.center = new LngLat(-155, 0);
t.same(transform.center, new LngLat(205, 0));
t.end();
});
t.test('longitude -360 - 0', (t) => {
const transform = new Transform();
transform.zoom = 6;
transform.resize(500, 500);
transform.lngRange = [-360, 0];
transform.latRange = [-90, 90];
transform.center = new LngLat(160, 0);
t.same(transform.center.lng.toFixed(10), -200);
t.end();
});
t.end();
});
t.test('maxBounds snaps in the correct direction (no forcing to other edge when width < 360)', (t) => {
const transform = new Transform();
transform.zoom = 6;
transform.resize(500, 500);
transform.setMaxBounds(new LngLatBounds([-160, -20], [160, 20]));
transform.center = new LngLat(170, 0);
t.ok(transform.center.lng > 150);
t.ok(transform.center.lng < 160);
transform.center = new LngLat(-170, 0);
t.ok(transform.center.lng > -160);
t.ok(transform.center.lng < -150);
t.end();
});
t.test('maxBounds works with unwrapped values across the 180th meridian (#6985)', (t) => {
const transform = new Transform();
transform.zoom = 6;
transform.resize(500, 500);
transform.setMaxBounds(new LngLatBounds([160, -20], [-160, 20])); //East bound is "smaller"
const wrap = val => ((val + 360) % 360);
transform.center = new LngLat(170, 0);
t.same(wrap(transform.center.lng), 170);
transform.center = new LngLat(-170, 0);
t.same(wrap(transform.center.lng), wrap(-170));
transform.center = new LngLat(150, 0);
let lng = wrap(transform.center.lng);
t.ok(lng > 160);
t.ok(lng < 180);
transform.center = new LngLat(-150, 0);
lng = wrap(transform.center.lng);
t.ok(lng < 360 - 160);
t.ok(lng > 360 - 180);
t.end();
});
t.test('_minZoomForBounds respects latRange and lngRange', (t) => {
t.test('it returns 0 when latRange and lngRange are undefined', (t) => {
const transform = new Transform();
transform.center = new LngLat(0, 0);
transform.zoom = 10;
transform.resize(500, 500);
t.equal(transform._minZoomForBounds(), 0);
t.end();
});
t.test('it results in equivalent minZoom as _constrain()', (t) => {
const transform = new Transform();
transform.center = new LngLat(0, 0);
transform.zoom = 10;
transform.resize(500, 500);
transform.lngRange = [-5, 5];
transform.latRange = [-5, 5];
const preComputedMinZoom = transform._minZoomForBounds();
transform.zoom = 0;
const constrainedMinZoom = transform.zoom;
t.equal(preComputedMinZoom, constrainedMinZoom);
t.end();
});
t.end();
});
test('mapbox-gl-js-internal#373', (t) => {
const options = {
minzoom: 3,
maxzoom: 22,
tileSize: 512
};
const transform = new Transform();
transform.resize(512, 512);
transform.center = {lng: -0.01, lat: 0.01};
transform.zoom = 3;
transform.pitch = 65;
transform.bearing = 45;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(3, 0, 3, 3, 3),
new OverscaledTileID(3, 0, 3, 3, 4),
new OverscaledTileID(3, 0, 3, 4, 3),
new OverscaledTileID(3, 0, 3, 4, 4),
new OverscaledTileID(3, 0, 3, 4, 2),
new OverscaledTileID(3, 0, 3, 5, 3),
new OverscaledTileID(3, 0, 3, 5, 2),
new OverscaledTileID(3, 0, 3, 4, 1),
new OverscaledTileID(3, 0, 3, 6, 3),
new OverscaledTileID(3, 0, 3, 5, 1),
new OverscaledTileID(3, 0, 3, 6, 2)]);
t.end();
});
test('pointCoordinate retains direction when point is offscreen', (t) => {
function assertDueNorth(t, m1, m2) {
const dx = m2.x - m1.x;
const dy = m2.y - m1.y;
const l = Math.sqrt(dx * dx + dy * dy);
const ndx = dx / l;
const ndy = dy / l;
t.ok(Math.abs(ndx) < 1e-10);
t.ok(Math.abs(ndy + 1) < 1e-10);
}
t.test('no pitch', (t) => {
const transform = new Transform();
transform.center = {lng: 0, lat: 0};
transform.zoom = 16;
transform.pitch = 0;
transform.bearing = 0;
transform.resize(512, 512);
const coord = transform.pointCoordinate(new Point(transform.width / 2, -10000));
assertDueNorth(t, {x: 0.5, y: 0.5, z : 0}, coord);
t.end();
});
t.test('high pitch', (t) => {
const transform = new Transform();
transform.center = {lng: 0, lat: 0};
transform.zoom = 16;
transform.pitch = 80;
transform.bearing = 0;
transform.resize(512, 512);
const coord = transform.pointCoordinate(new Point(transform.width / 2, -10000));
assertDueNorth(t, {x: 0.5, y: 0.5, z : 0}, coord);
t.end();
});
t.test('medium pitch', (t) => {
const transform = new Transform();
transform.center = {lng: 0, lat: 0};
transform.zoom = 16;
transform.pitch = 70;
transform.bearing = 0;
transform.resize(512, 512);
const coord = transform.pointCoordinate(new Point(transform.width / 2, -10000));
assertDueNorth(t, {x: 0.5, y: 0.5, z : 0}, coord);
t.end();
});
t.end();
});
test('coveringTiles', (t) => {
const options = {
minzoom: 1,
maxzoom: 10,
tileSize: 512
};
const transform = new Transform();
transform.resize(200, 200);
// make slightly off center so that sort order is not subject to precision issues
transform.center = {lng: -0.01, lat: 0.01};
transform.zoom = 0;
t.deepEqual(transform.coveringTiles(options), []);
transform.zoom = 1;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(1, 0, 1, 0, 0),
new OverscaledTileID(1, 0, 1, 1, 0),
new OverscaledTileID(1, 0, 1, 0, 1),
new OverscaledTileID(1, 0, 1, 1, 1)]);
transform.zoom = 2.4;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(2, 0, 2, 1, 1),
new OverscaledTileID(2, 0, 2, 2, 1),
new OverscaledTileID(2, 0, 2, 1, 2),
new OverscaledTileID(2, 0, 2, 2, 2)]);
transform.zoom = 10;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(10, 0, 10, 511, 511),
new OverscaledTileID(10, 0, 10, 512, 511),
new OverscaledTileID(10, 0, 10, 511, 512),
new OverscaledTileID(10, 0, 10, 512, 512)]);
transform.zoom = 11;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(10, 0, 10, 511, 511),
new OverscaledTileID(10, 0, 10, 512, 511),
new OverscaledTileID(10, 0, 10, 511, 512),
new OverscaledTileID(10, 0, 10, 512, 512)]);
transform.zoom = 5.1;
transform.pitch = 60.0;
transform.bearing = 32.0;
transform.center = new LngLat(56.90, 48.20);
transform.resize(1024, 768);
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(5, 0, 5, 21, 11),
new OverscaledTileID(5, 0, 5, 20, 11),
new OverscaledTileID(5, 0, 5, 21, 10),
new OverscaledTileID(5, 0, 5, 20, 10),
new OverscaledTileID(5, 0, 5, 21, 12),
new OverscaledTileID(5, 0, 5, 22, 11),
new OverscaledTileID(5, 0, 5, 20, 12),
new OverscaledTileID(5, 0, 5, 22, 10),
new OverscaledTileID(5, 0, 5, 21, 9),
new OverscaledTileID(5, 0, 5, 20, 9),
new OverscaledTileID(5, 0, 5, 22, 9),
new OverscaledTileID(5, 0, 5, 23, 10),
new OverscaledTileID(5, 0, 5, 21, 8),
new OverscaledTileID(5, 0, 5, 20, 8),
new OverscaledTileID(5, 0, 5, 23, 9),
new OverscaledTileID(5, 0, 5, 22, 8),
new OverscaledTileID(5, 0, 5, 23, 8),
new OverscaledTileID(5, 0, 5, 21, 7),
new OverscaledTileID(5, 0, 5, 20, 7),
new OverscaledTileID(5, 0, 5, 24, 9),
new OverscaledTileID(5, 0, 5, 22, 7)
]);
transform.zoom = 8;
transform.pitch = 60;
transform.bearing = 45.0;
transform.center = new LngLat(25.02, 60.15);
transform.resize(300, 50);
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(8, 0, 8, 145, 74),
new OverscaledTileID(8, 0, 8, 145, 73),
new OverscaledTileID(8, 0, 8, 146, 74)
]);
transform.resize(50, 300);
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(8, 0, 8, 145, 74),
new OverscaledTileID(8, 0, 8, 145, 73),
new OverscaledTileID(8, 0, 8, 146, 74),
new OverscaledTileID(8, 0, 8, 146, 73)
]);
transform.zoom = 2;
transform.pitch = 0;
transform.bearing = 0;
transform.resize(300, 300);
t.test('calculates tile coverage at w > 0', (t) => {
transform.center = {lng: 630.02, lat: 0.01};
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(2, 2, 2, 1, 1),
new OverscaledTileID(2, 2, 2, 1, 2),
new OverscaledTileID(2, 2, 2, 0, 1),
new OverscaledTileID(2, 2, 2, 0, 2)
]);
t.end();
});
t.test('calculates tile coverage at w = -1', (t) => {
transform.center = {lng: -360.01, lat: 0.02};
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(2, -1, 2, 1, 1),
new OverscaledTileID(2, -1, 2, 2, 1),
new OverscaledTileID(2, -1, 2, 1, 2),
new OverscaledTileID(2, -1, 2, 2, 2)
]);
t.end();
});
t.test('calculates tile coverage across meridian', (t) => {
transform.zoom = 1;
transform.center = {lng: -180.01, lat: 0.02};
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(1, -1, 1, 1, 0),
new OverscaledTileID(1, 0, 1, 0, 0),
new OverscaledTileID(1, -1, 1, 1, 1),
new OverscaledTileID(1, 0, 1, 0, 1)
]);
t.end();
});
t.test('only includes tiles for a single world, if renderWorldCopies is set to false', (t) => {
transform.zoom = 1;
transform.center = {lng: -180.01, lat: 0.01};
transform.renderWorldCopies = false;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(1, 0, 1, 0, 0),
new OverscaledTileID(1, 0, 1, 0, 1)
]);
t.end();
});
t.test('mapbox-gl-js-internal#86', (t) => {
transform.renderWorldCopies = true;
transform.maxPitch = 85;
transform.zoom = 1.28;
transform.bearing = -81.6;
transform.pitch = 81;
transform.center = {lng: -153.3, lat: 0.0};
transform.resize(2759, 1242);
t.deepEqual(transform.coveringTiles({tileSize: 512}), [
new OverscaledTileID(1, 0, 1, 0, 1),
new OverscaledTileID(1, 0, 1, 0, 0),
new OverscaledTileID(0, -1, 0, 0, 0),
new OverscaledTileID(1, 0, 1, 1, 1),
new OverscaledTileID(1, 0, 1, 1, 0),
new OverscaledTileID(1, 1, 1, 0, 1),
new OverscaledTileID(1, 1, 1, 0, 0),
new OverscaledTileID(0, -2, 0, 0, 0),
new OverscaledTileID(0, -3, 0, 0, 0)
]);
t.end();
});
t.end();
});
test('coveringTiles with fog culling enabled', (t) => {
const options = {
minzoom: 1,
maxzoom: 10,
tileSize: 512
};
const transform = new Transform();
transform.resize(200, 200);
transform.center = {lng: -0.01, lat: 0.01};
transform.zoom = 0;
transform.fogCullDistSq = 1.5;
transform.pitch = 85.0;
t.deepEqual(transform.coveringTiles(options), []);
transform.zoom = 1;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(1, 0, 1, 0, 1),
new OverscaledTileID(1, 0, 1, 1, 1)]);
transform.zoom = 2.4;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(2, 0, 2, 1, 2),
new OverscaledTileID(2, 0, 2, 2, 2)]);
transform.zoom = 10;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(10, 0, 10, 511, 512),
new OverscaledTileID(10, 0, 10, 512, 512)]);
transform.zoom = 11;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(10, 0, 10, 511, 511),
new OverscaledTileID(10, 0, 10, 512, 511),
new OverscaledTileID(10, 0, 10, 511, 512),
new OverscaledTileID(10, 0, 10, 512, 512)]);
transform.zoom = 5.1;
transform.bearing = 32.0;
transform.center = new LngLat(56.90, 48.20);
transform.resize(1024, 768);
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(5, 0, 5, 21, 11),
new OverscaledTileID(5, 0, 5, 20, 11),
new OverscaledTileID(5, 0, 5, 20, 10),
new OverscaledTileID(5, 0, 5, 21, 12),
new OverscaledTileID(5, 0, 5, 20, 12)
]);
transform.zoom = 8;
transform.pitch = 60;
transform.bearing = 45.0;
transform.center = new LngLat(25.02, 60.15);
transform.resize(300, 50);
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(8, 0, 8, 145, 74)
]);
transform.resize(50, 300);
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(8, 0, 8, 145, 74),
new OverscaledTileID(8, 0, 8, 145, 73)
]);
t.end();
});
const createCollisionElevation = (elevation) => {
return {
getAtPointOrZero(p) {
if (p.x === 0.5 && p.y === 0.5)
return 0;
return elevation;
},
getForTilePoints(tileID, points) {
for (const p of points) {
p[2] = elevation;
}
return true;
},
getMinElevationBelowMSL: () => 0
};
};
const createConstantElevation = (elevation) => {
return {
getAtPointOrZero(_) {
return elevation;
},
getForTilePoints(tileID, points) {
for (const p of points) {
p[2] = elevation;
}
return true;
},
getMinElevationBelowMSL: () => 0
};
};
const createRampElevation = (scale) => {
return {
getAtPointOrZero(p) {
return scale * (p.x + p.y - 1.0);
},
getForTilePoints(tileID, points) {
for (const p of points) {
p[2] = scale * (p.x + p.y - 1.0);
}
return true;
},
getMinElevationBelowMSL: () => 0
};
};
test('Constrained camera height over terrain', (t) => {
const transform = new Transform();
transform.resize(200, 200);
transform.maxPitch = 85;
transform.elevation = createCollisionElevation(10);
transform.constantCameraHeight = false;
transform.bearing = -45;
transform.pitch = 85;
// Set camera altitude to 5 meters
const altitudeZ = mercatorZfromAltitude(5, transform.center.lat) / Math.cos(degToRad(85));
const zoom = transform._zoomFromMercatorZ(altitudeZ);
transform.zoom = zoom;
// Pitch should have been adjusted so that the camera isn't under the terrain
const pixelsPerMeter = mercatorZfromAltitude(1, transform.center.lat) * transform.worldSize;
const updatedAltitude = transform.cameraToCenterDistance / pixelsPerMeter * Math.cos(degToRad(transform.pitch));
t.true(updatedAltitude > 10);
t.equal(fixedNum(transform.zoom), fixedNum(zoom));
t.equal(fixedNum(transform.bearing), -45);
t.end();
});
test('Compute zoom from camera height', (t) => {
const transform = new Transform();
transform.resize(200, 200);
transform.center = {lng: 0, lat: 0};
transform.zoom = 16;
transform.elevation = createRampElevation(500);
t.equal(transform.elevation.getAtPointOrZero(new MercatorCoordinate(1.0, 0.5)), 250);
t.equal(transform.zoom, 16);
t.equal(transform._cameraZoom, 16);
// zoom should remain unchanged
transform.cameraElevationReference = "ground";
transform.center = new LngLat(180, 0);
t.equal(transform.zoom, 16);
transform.center = new LngLat(0, 0);
t.equal(transform.zoom, 16);
// zoom should change so that the altitude remains constant
transform.cameraElevationReference = "sea";
transform.center = new LngLat(180, 0);
t.equal(transform._cameraZoom, 16);
const altitudeZ = transform.cameraToCenterDistance / (Math.pow(2.0, transform._cameraZoom) * transform.tileSize);
const heightZ = transform.cameraToCenterDistance / (Math.pow(2.0, transform.zoom) * transform.tileSize);
const elevationZ = mercatorZfromAltitude(250, 0);
t.equal(fixedNum(elevationZ + heightZ), fixedNum(altitudeZ));
t.end();
});
test('Constant camera height over terrain', (t) => {
const transform = new Transform();
transform.resize(200, 200);
transform.center = {lng: 0, lat: 0};
transform.zoom = 16;
transform.elevation = createConstantElevation(0);
t.equal(transform.zoom, transform._cameraZoom);
// Camera zoom should change so that the standard zoom value describes distance between the camera and the terrain
transform.elevation = createConstantElevation(10000);
t.equal(fixedNum(transform._cameraZoom), 11.1449615644);
// Camera height over terrain should remain constant
const altitudeZ = transform.cameraToCenterDistance / (Math.pow(2.0, transform._cameraZoom) * transform.tileSize);
const heightZ = transform.cameraToCenterDistance / (Math.pow(2.0, transform.zoom) * transform.tileSize);
const elevationZ = mercatorZfromAltitude(10000, 0);
t.equal(elevationZ + heightZ, altitudeZ);
transform.pitch = 32;
t.equal(fixedNum(transform._cameraZoom), 11.1449615644);
t.equal(transform.zoom, 16);
t.end();
});
test('coveringTiles for terrain', (t) => {
const options = {
minzoom: 1,
maxzoom: 10,
tileSize: 512
};
const transform = new Transform();
let centerElevation = 0;
let tilesDefaultElevation = 0;
const tileElevation = {};
const elevation = {
getAtPointOrZero(_) {
return this.exaggeration() * centerElevation;
},
getMinMaxForTile(tileID) {
const ele = tileElevation[tileID.key] !== undefined ? tileElevation[tileID.key] : tilesDefaultElevation;
if (ele === null) return null;
return {min: this.exaggeration() * ele, max: this.exaggeration() * ele};
},
exaggeration() {
return 10; // Low tile zoom used, exaggerate elevation to make impact.
},
getMinElevationBelowMSL: () => 0
};
transform.elevation = elevation;
transform.resize(200, 200);
// make slightly off center so that sort order is not subject to precision issues
transform.center = {lng: -0.01, lat: 0.01};
transform.zoom = 0;
t.deepEqual(transform.coveringTiles(options), []);
transform.zoom = 1;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(1, 0, 1, 0, 0),
new OverscaledTileID(1, 0, 1, 1, 0),
new OverscaledTileID(1, 0, 1, 0, 1),
new OverscaledTileID(1, 0, 1, 1, 1)]);
transform.zoom = 2.4;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(2, 0, 2, 1, 1),
new OverscaledTileID(2, 0, 2, 2, 1),
new OverscaledTileID(2, 0, 2, 1, 2),
new OverscaledTileID(2, 0, 2, 2, 2)]);
transform.zoom = 10;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(10, 0, 10, 511, 511),
new OverscaledTileID(10, 0, 10, 512, 511),
new OverscaledTileID(10, 0, 10, 511, 512),
new OverscaledTileID(10, 0, 10, 512, 512)]);
transform.zoom = 11;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(10, 0, 10, 511, 511),
new OverscaledTileID(10, 0, 10, 512, 511),
new OverscaledTileID(10, 0, 10, 511, 512),
new OverscaledTileID(10, 0, 10, 512, 512)]);
transform.zoom = 9.1;
transform.pitch = 60.0;
transform.bearing = 32.0;
transform.center = new LngLat(56.90, 48.20);
transform.resize(1024, 768);
transform.elevation = null;
const cover2D = transform.coveringTiles(options);
// No LOD as there is no elevation data.
t.true(cover2D[0].overscaledZ === cover2D[cover2D.length - 1].overscaledZ);
transform.pitch = 65.0;
transform.elevation = elevation;
const cover = transform.coveringTiles(options);
// First part of the cover should be the same as for 60 degrees no elevation case.
t.deepEqual(cover.slice(0, 6), cover2D.slice(0, 6));
// Even though it is larger pitch, less tiles are expected as LOD kicks in.
t.true(cover.length < cover2D.length);
t.true(cover[0].overscaledZ > cover[cover.length - 1].overscaledZ);
// Elevated LOD with elevated center returns the same
tilesDefaultElevation = centerElevation = 10000;
transform.elevation = null;
transform.elevation = elevation;
const cover10k = transform.coveringTiles(options);
t.deepEqual(cover, cover10k);
// Lower tiles on side get clipped.
const lowTiles = [
new OverscaledTileID(9, 0, 9, 335, 178).key,
new OverscaledTileID(9, 0, 9, 337, 178).key
];
t.true(cover.filter(t => lowTiles.includes(t.key)).length === lowTiles.length);
for (const t of lowTiles) {
tileElevation[t] = 0;
}
const coverLowSide = transform.coveringTiles(options);
t.true(coverLowSide.filter(t => lowTiles.includes(t.key)).length === 0);
tileElevation[lowTiles[0]] = null; // missing elevation information gets to cover.
t.ok(transform.coveringTiles(options).find(t => t.key === lowTiles[0]));
transform.zoom = 2;
transform.pitch = 0;
transform.bearing = 0;
transform.resize(300, 300);
t.test('calculates tile coverage at w > 0', (t) => {
transform.center = {lng: 630.02, lat: 0.01};
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(2, 2, 2, 1, 1),
new OverscaledTileID(2, 2, 2, 1, 2),
new OverscaledTileID(2, 2, 2, 0, 1),
new OverscaledTileID(2, 2, 2, 0, 2)
]);
t.end();
});
t.test('calculates tile coverage at w = -1', (t) => {
transform.center = {lng: -360.01, lat: 0.02};
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(2, -1, 2, 1, 1),
new OverscaledTileID(2, -1, 2, 2, 1),
new OverscaledTileID(2, -1, 2, 1, 2),
new OverscaledTileID(2, -1, 2, 2, 2)
]);
t.end();
});
t.test('calculates tile coverage across meridian', (t) => {
transform.zoom = 1;
transform.center = {lng: -180.01, lat: 0.02};
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(1, -1, 1, 1, 0),
new OverscaledTileID(1, 0, 1, 0, 0),
new OverscaledTileID(1, -1, 1, 1, 1),
new OverscaledTileID(1, 0, 1, 0, 1)
]);
t.end();
});
t.test('only includes tiles for a single world, if renderWorldCopies is set to false', (t) => {
transform.zoom = 1;
transform.center = {lng: -180.01, lat: 0.01};
transform.renderWorldCopies = false;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(1, 0, 1, 0, 0),
new OverscaledTileID(1, 0, 1, 0, 1)
]);
t.end();
});
t.test('proper distance to center with wrap. Zoom drop at the end.', (t) => {
transform.resize(2000, 2000);
transform.zoom = 3.29;
transform.pitch = 57;
transform.bearing = 91.8;
transform.center = {lng: -134.66, lat: 20.52};
const cover = transform.coveringTiles(options);
t.assert(cover[0].overscaledZ === 3);
t.assert(cover[cover.length - 1].overscaledZ <= 2);
t.end();
});
t.test('zoom 22 somewhere in Mile High City should load only visible tiles', (t) => {
tilesDefaultElevation = null;
centerElevation = 1600;
tileElevation[new OverscaledTileID(14, 0, 14, 3413, 6218).key] = 1600;
transform.resize(768, 768);
transform.zoom = options.maxzoom = 22;
transform.center = {lng: -104.99813327, lat: 39.72784465999999};
options.roundZoom = true;
t.deepEqual(transform.coveringTiles(options), [
new OverscaledTileID(22, 0, 22, 873835, 1592007),
new OverscaledTileID(22, 0, 22, 873834, 1592007),
new OverscaledTileID(22, 0, 22, 873835, 1592006),
new OverscaledTileID(22, 0, 22, 873834, 1592006)
]);
t.end();
});
t.end();
});
test('loads only visible on terrain', (t) => {
// See https://github.com/mapbox/mapbox-gl-js/pull/10462
const demTiles = {};
demTiles[new CanonicalTileID(14, 8546, 5850).key] = 2760;
demTiles[new CanonicalTileID(14, 8546, 5849).key] = 2760;
demTiles[new CanonicalTileID(14, 8546, 5851).key] = 2760;
demTiles[new CanonicalTileID(13, 4272, 2925).key] = 2760;
demTiles[new CanonicalTileID(13, 4272, 2924).key] = 0;
demTiles[new CanonicalTileID(14, 8546, 5848).key] = 0;
demTiles[new CanonicalTileID(12, 2136, 1463).key] = 0;
demTiles[new CanonicalTileID(11, 1067, 731).key] = 0;
demTiles[new CanonicalTileID(11, 1066, 731).key] = 0;
demTiles[new CanonicalTileID(11, 1068, 730).key] = 0;
demTiles[new CanonicalTileID(11, 1067, 730).key] = 0;
demTiles[new CanonicalTileID(11, 1066, 730).key] = 0;
demTiles[new CanonicalTileID(9, 266, 183).key] = 0;
const options = {
minzoom: 1,
maxzoom: 22,
tileSize: 512
};
const transform = new Transform();
transform.elevation = {
getAtPointOrZero(_) {
return 2760;
},
getMinMaxForTile(tileID) {
for (let z = tileID.canonical.z - 1; z >= 9; z--) {
const id = tileID.calculateScaledKey(z);
if (demTiles.hasOwnProperty(id)) {
return {min: 0, max: demTiles[id]};
}
}
return null;
},
exaggeration() {
return 1;
},
getMinElevationBelowMSL: () => 0
};
transform.bearing = -95.8;
transform.resize(1335, 934);
transform.renderWorldCopies = true;
transform.zoom = 16.07;
transform.center = new LngLat(7.785269, 45.671);
transform.zoom = 16.07;
transform.pitch = 62;
const cover = transform.coveringTiles(options);
t.assert(cover.length === 43);
t.assert(cover.find(tileID => tileID.canonical.z === 13 && tileID.canonical.x === 4270 && tileID.canonical.y === 2927));
t.assert(cover.find(tileID => tileID.canonical.z === 12 && tileID.canonical.x === 2134 && tileID.canonical.y === 1461));
t.end();
});
test('coveringZoomLevel', (t) => {
const options = {
minzoom: 1,
maxzoom: 10,
tileSize: 512
};
const transform = new Transform();
transform.zoom = 0;
t.deepEqual(transform.coveringZoomLevel(options), 0);
transform.zoom = 0.1;
t.deepEqual(transform.coveringZoomLevel(options), 0);
transform.zoom = 1;
t.deepEqual(transform.coveringZoomLevel(options), 1);
transform.zoom = 2.4;
t.deepEqual(transform.coveringZoomLevel(options), 2);
transform.zoom = 10;
t.deepEqual(transform.coveringZoomLevel(options), 10);
transform.zoom = 11;
t.deepEqual(transform.coveringZoomLevel(options), 11);
transform.zoom = 11.5;
t.deepEqual(transform.coveringZoomLevel(options), 11);
options.tileSize = 256;
transform.zoom = 0;
t.deepEqual(transform.coveringZoomLevel(options), 1);
transform.zoom = 0.1;
t.deepEqual(transform.coveringZoomLevel(options), 1);
transform.zoom = 1;
t.deepEqual(transform.coveringZoomLevel(options), 2);
transform.zoom = 2.4;
t.deepEqual(transform.coveringZoomLevel(options), 3);
transform.zoom = 10;
t.deepEqual(transform.coveringZoomLevel(options), 11);
transform.zoom = 11;
t.deepEqual(transform.coveringZoomLevel(options), 12);
transform.zoom = 11.5;
t.deepEqual(transform.coveringZoomLevel(options), 12);
options.roundZoom = true;