2d rainbow patterns?

Patterns and Code
20

It’s there… Check capitalization and spelling, then check to be sure that all the pairs of braces in the functions match up. If you can’t get yours to work, compare it to:

// Radial rainbow for 2D displays
// initial circle/rainbow code by @zranger1
// modified for sound by @scruffynerf

export var speed = 0.5
export var direction = 1
export var size = 100
export var spin = 1
export var spincycle = 0
export var spincyclearray = 0

export var frequencyData
export var angle

// UI sliders

// higher is faster
export function sliderSpeed(v) {
  speed = 1-v;  
}

// left = inward, right = outward
export function sliderDirection(v) {
  direction = (v < 0.5) ? 1 : -1;  
}

// sizing
export function sliderSize(v) {
  size = 200*v
}

// spin
export function sliderSpin(v) {
  spin = v
}

// pythagorean distance from center of display.  Pixelblaze
// provides normalized x,y coords, so center is always going
// to be (0.5,0.5) regardless of real world display dimensions
function getRadius(x, y) {
  x -= 0.5; y -= 0.5;
  return sqrt(x*x + y*y)*2;
}

// pythagorean angle from center of display.  Pixelblaze
// provides normalized x,y coords, so center is always going
// to be (0.5,0.5) regardless of real world display dimensions
function getAngle(x, y) {
  x -= 0.5; y -= 0.5;    
  angle = floor(((atan2(y,x)+PI)/4)*32)%32
  angle = (angle+spincyclearray)%32;
  return angle;
}

// generate a timer - a sawtooth wave that we can
// use to animate color -- the direction flag makes
// it positive or negative, depending on the UI slider setting
// spin slider controls the spin, currently only one direction
export function beforeRender(delta) {
  t1 = direction * time(0.08 * speed);
  spincycle = (spincycle + spin)%32
  spincyclearray = floor(spincycle);
}

// use radius+angle and timer to color every pixel, if it's loud enough
export function render2D(index, x, y) {
  radius = getRadius(x, y);
  bri = (radius <= frequencyData[getAngle(x,y)]*size) ? 1 : 0.3
  hsv(t1+radius, 1, bri);
}
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