src/constants/index.js

export const PI = 3.142;

/**
 * The max particle number in pool.
 *
 * @const {integer}
 */
export const POOL_MAX = 500;
export const TIME_STEP = 60;
export const DR = PI / 180;

/**
 * 1:100
 *
 * @const {integer}
 */
export const MEASURE = 100;
export const EULER = 'euler';
export const RK2 = 'runge-kutta2';
export const RK4 = 'runge-kutta4';
export const VERLET = 'verlet';
export const BIND_EMITTER_EVENT = false;

export const __DEV__ = () => {
  if (!process) {
    return false;
  }

  if (!process.env) {
    return false;
  }

  if (!process.env.NODE_ENV) {
    return false;
  }

  if (process.env.NODE_ENV !== 'development') {
    return false;
  }

  return true;
};