EvanBacon

import Expo from 'expo';
import * as ExpoPixi from 'expo-pixi';
import React, { Component } from 'react';
import { Image, StyleSheet, View } from 'react-native';

export default class App extends Component {
  state = {
    strokeColor: Math.random() * 0xffffff,
    strokeWidth: Math.random() * 30 + 10,
  };

EvanBacon

const scaleLongestSideToSize = (mesh, size) => {
  const { x: width, y: height, z: depth } = new THREE.Box3().setFromObject(mesh).getSize();
  const longest = Math.max(width, Math.max(height, depth));
  const scale = size / longest;
  mesh.scale.set(scale, scale, scale);
}
export default scaleLongestSideToSize;

EvanBacon

const alignMesh = (mesh, axis = { x: 0.5, y: 0.5, z: 0.5 }) => {
  axis = axis || {};
  const box = new THREE.Box3().setFromObject(mesh);

  const size = box.getSize();
  const { max } = box;
  const min = { x: -box.min.x, y: -box.min.y, z: -box.min.z };

  Object.keys(axis).map(key => {
    const scale = axis[key];