mercatorUtils¶

Interfaces¶

LngLatPoint¶

Defined in: ui/map/rendering/mercatorUtils.ts:11

Shared web-mercator math for the THREE.js custom layers. The 3D aircraft and 3D route layers each position their meshes in a local meters-from- scene-origin frame; both used to carry private copies of these conversions.

Properties¶

lng¶

lng: number;

Defined in: ui/map/rendering/mercatorUtils.ts:12

lat¶

lat: number;

Defined in: ui/map/rendering/mercatorUtils.ts:13

Functions¶

relativePositionMeters()¶

function relativePositionMeters(origin, target): object;

Defined in: ui/map/rendering/mercatorUtils.ts:21

East/north offset in meters from origin to target, using the mercator meter scale at the origin (consistent with a scene whose camera transform is scaled by meterInMercatorCoordinateUnits at the origin).

Parameters¶

origin¶

LngLatPoint

target¶

LngLatPoint

Returns¶

object

east¶

east: number;

north¶

north: number;

altitudeScaledForOrigin()¶

function altitudeScaledForOrigin(
   altMeters, 
   point, 
   origin): number;

Defined in: ui/map/rendering/mercatorUtils.ts:43

Pre-scale an altitude so that, after the camera projection multiplies scene Y by meterInMercatorCoordinateUnits at the SCENE ORIGIN's lat, the resulting world Z equals altitude x per-point mercator scale. This makes altitude rendering independent of which scene origin a layer happens to use, so layers with different origins agree on visual height.

Parameters¶

altMeters¶

number

point¶

LngLatPoint

origin¶

LngLatPoint

Returns¶

number

mercatorCameraMatrix()¶

function mercatorCameraMatrix(mainMatrix, origin): Matrix4;

Defined in: ui/map/rendering/mercatorUtils.ts:61

Camera projection matrix for a scene positioned in meters relative to origin: mainMatrix x translate(origin in mercator) x uniform meter scale.

Expects the scene group to map its local (east, up, north) frame into mercator axes with a plain rotateX(PI/2) and no mirror — keeping every scale positive avoids flipping texture content (e.g. fuselage text).

Parameters¶

mainMatrix¶

ArrayLike\<number>

origin¶

LngLatPoint

Returns¶

Matrix4