import colorsys
import math

def scale(val, src, dst):
    """
    Scale the given value from the scale of src to the scale of dst.
    """
    return ((val - src[0]) / (src[1]-src[0])) * (dst[1]-dst[0]) + dst[0]

def hsv2rgb(h, s, v):
    hsv = colorsys.hsv_to_rgb(h,s,v)
    return tuple(round(i * 255) for i in hsv)
def pos_to_color(x, y):
    r = 160/2
    x = round((x - r) / r * 100) / 100
    y = round((r - y) / r * 100) / 100
    
    r = math.sqrt(x*x + y*y)
    sat = 0
    if (r > 1):
        sat = 0
    else:
        sat = r
    hsv = (math.degrees(math.atan2(y, x))%360/360, sat, 1)
    rgb = hsv2rgb(hsv[0],hsv[1],hsv[2])
    return rgb

def rgb_brightness(rgb_color, brightness):
    red = rgb_color[0]/255*brightness
    green = rgb_color[1]/255*brightness
    blue = rgb_color[2]/255*brightness
    return [red, green, blue]

def rgb_dec565(rgb_color):
    red = rgb_color[0]
    green = rgb_color[1]
    blue = rgb_color[2]
    # take in the red, green and blue values (0-255) as 8 bit values and then combine
    # and shift them to make them a 16 bit dec value in 565 format. 
    return ((int(red / 255 * 31) << 11) | (int(green / 255 * 63) << 5) | (int(blue / 255 * 31)))