Example of texture setup that doesn't work on iOS

gistfile1.js

let regl = new Regl({
  canvas: canvas,
  extensions: ['OES_texture_float', 'OES_texture_half_float'],
  optionalExtensions: ['oes_texture_float_linear', 'OES_texture_half_float']
});

const RADIUS = dimensions.width > 800 ? 256 : 64;
const TEXTURE_DATA = (Array(RADIUS * RADIUS * 4)).fill(1).map((p, i) => {
  angle = i / (RADIUS / 2);

  if (i % 4 == 0) {
    return Math.sin(angle);
  } else if (i % 4 == 1) {
    return Math.cos(angle);
  } else if (i % 4 == 2) {
    return angle / 10;
  } else {
    return 0;
  }
});

const state = new Array(2).fill(0).map(() => regl.framebuffer({
  depthStencil: false,
  colorFormat: 'rgba',
  color: regl.texture({
    data: TEXTURE_DATA,
    radius: RADIUS,
    type: dimensions.width > 800 ? 'float' : 'half float'
  })
}))