@polygonjs/plugin-mapbox/src/core/mapbox/Constants.ts

Mapbox plugin for the 3D engine https://polygonjs.com

const WORLD_SIZE = 512;
const MERCATOR_A = 6378137.0;

export const CoreMapboxConstants = {
	WORLD_SIZE: WORLD_SIZE,
	PROJECTION_WORLD_SIZE: WORLD_SIZE / (MERCATOR_A * Math.PI) / 2,
	MERCATOR_A: MERCATOR_A, // 900913 projection property
	DEG2RAD: Math.PI / 180,
	RAD2DEG: 180 / Math.PI,
	EARTH_CIRCUMFERENCE: 40075000
}