KCK - Zadanie 2 na 3.0

#!/usr/bin/env python
# -*- coding: utf-8 -*-
from __future__ import division             # Division in Python 2.7
import matplotlib
matplotlib.use('Agg')                       # So that we can render files without GUI
import matplotlib.pyplot as plt
from matplotlib import rc
import numpy as np
from matplotlib import colors
import math as math

def plot_color_gradients(gradients, names):
    # For pretty latex fonts (commented out, because it does not work on some machines)
    #rc('text', usetex=True)
    #rc('font', family='serif', serif=['Times'], size=10)
    rc('legend', fontsize=10)

    column_width_pt = 400         # Show in latex using \the\linewidth
    pt_per_inch = 72

    size = column_width_pt / pt_per_inch

    fig, axes = plt.subplots(nrows=len(gradients), sharex=True, figsize=(size, 0.75 * size))
    fig.subplots_adjust(top=1.00, bottom=0.05, left=0.25, right=0.95)


    for ax, gradient, name in zip(axes, gradients, names):
        # Create image with two lines and draw gradient on it
        img = np.zeros((2, 1024, 3))

        for i, v in enumerate(np.linspace(0, 1, 1024)):
            img[:, i] = gradient(v)


        im = ax.imshow(img, aspect='auto')
        im.set_extent([0, 1, 0, 1])
        ax.yaxis.set_visible(False)

        pos = list(ax.get_position().bounds)
        x_text = pos[0] - 0.25
        y_text = pos[1] + pos[3]/2.
        fig.text(x_text, y_text, name, va='center', ha='left', fontsize=10)

        fig.savefig('my-gradients.pdf')

def Interpolate2Colors(A, B, pos, max_pos):
    A_R = A >> 16
    A_G = (A >> 8) & 0xff
    A_B = A & 0xff

    B_R = B >> 16
    B_G = (B >> 8) & 0xff
    B_B = B & 0xff

    C_R = (((B_R - A_R) * pos) / max_pos + A_R) / 255
    C_G = (((B_G - A_G) * pos) / max_pos + A_G) / 255
    C_B = (((B_B - A_B) * pos) / max_pos + A_B) / 255

    return (C_R, C_G, C_B)



def InterpolateNColors(c_list, value, max_value):
    for i in range(1, len(c_list)):
        if (value < i * max_value / (len(c_list)-1)):
            color = Interpolate2Colors(c_list[i-1], c_list[i], value - (((i-1)*max_value) / (len(c_list)-1)), max_value / (len(c_list)-1))
            return color



def hsv2rgb(h, s, v):
    RGBcolor = [0,0,0]
    r = 0
    g = 0
    b = 0

    if (s==0):
        r = g = b = v;
    else:
        if(h==1):
            h = 0
        z = math.floor(h*6);
        i = int(z);
        f = (h*6 - z);
        p = v*(1-s);
        q = v*(1-s*f);
        t = v*(1-s*(1-f));
        if (i == 0):
            r=v
            g=t
            b=p
        elif (i == 1):
            r=q
            g=v
            b=p
        elif (i == 2):
            r=p
            g=v
            b=t
        elif (i == 3):
            r=p
            g=q
            b=v
        elif (i == 4):
            r=t
            g=p
            b=v
        elif (i == 5):
            r=v
            g=p
            b=q

    c = int((256*r))
    if(c>255):
        c = 255
    RGBcolor[0] = c

    c = int((256*g))
    if(c>255):
        c = 255
    RGBcolor[1] = c

    c = int((256*b))
    if(c>255):
        c = 255
    RGBcolor[2] = c

    return (RGBcolor[0], RGBcolor[1], RGBcolor[2])

def gradient_rgb_bw(v):
    return (v, v, v)


def gradient_rgb_gbr(v):
    return InterpolateNColors([0x00FF00, 0x0000FF, 0xFF0000], v, 1)


def gradient_rgb_gbr_full(v):
    return InterpolateNColors([0x00FF00, 0x00FFFF, 0x0000FF, 0xFF00FF, 0xFF0000], v, 1)


def gradient_rgb_wb_custom(v):
    return InterpolateNColors([0xFFFFFF, 0xFF00FF, 0x0000FF, 0x00FFFF, 0x00FF00, 0xFFFF00, 0xFF0000, 0x000000], v, 1)


def gradient_hsv_bw(v):
    return (v, v, v)


def gradient_hsv_gbr(v):
    return InterpolateNColors([0x00FF00, 0x00FFFF, 0x0000FF, 0xFF00FF, 0xFF0000], v, 1)

def gradient_hsv_unknown(v):
    return InterpolateNColors([0x80FF7F, 0xE5FF7F, 0xFF807F], v, 1)


def gradient_hsv_custom(v):
    return InterpolateNColors([0xFD02DC, 0x80DC2A, 0x0321FF, 0xF91A0D, 0xD72A2C, 0xFF0290, 0x0022AA, 0x30FD20], v, 1)


if __name__ == '__main__':
    def toname(g):
        return g.__name__.replace('gradient_', '').replace('_', '-').upper()

    gradients = (gradient_rgb_bw, gradient_rgb_gbr, gradient_rgb_gbr_full, gradient_rgb_wb_custom,
        gradient_hsv_bw, gradient_hsv_gbr, gradient_hsv_unknown, gradient_hsv_custom)

    plot_color_gradients(gradients, [toname(g) for g in gradients])
    print(hsv2rgb(120, 100, 100))