blup/generators/thimblerig.py

#!/usr/bin/env python3

import sys
import random
import math
import argparse
import collections
import blup.frame
import blup.output
import blup.animation
import blup.writebml
import colorsys
import functools


WIDTH = 22
HEIGHT = 16
DEPTH = 256


class Point(collections.namedtuple('Point', ['x', 'y'])):
    def __add__(self, other):
        return Point(self.x + other.x, self.y + other.y)
    def __sub__(self, other):
        return Point(self.x - other.x, self.y - other.y)
    def __mul__(self, other):
        if isinstance(other, Point):
            raise Exception('not implemented')
        else:
            return Point(self.x * other, self.y * other)
    def __truediv__(self, other):
        if isinstance(other, Point):
            raise ValueError()
        else:
            return self * (1/other)
    @property
    def len(self):
        return math.sqrt(self.x**2 + self.y**2)
    @property
    def n(self):
        n = Point(self.y, -self.x)
        return n / n.len
    @property
    def intp(self):
        return Point(int(round(self.x)), int(round(self.y)))


def convert_color(c):
    return list(map(lambda x: int(round(x*(DEPTH-1))), c))


def get_random_color():
    return colorsys.hsv_to_rgb(random.random(), 0.5 + random.random() / 2, 1)


class CurveFunction():
    def __init__(self, p1, p2):
        self.p1, self.p2 = p1, p2
        d = p2 - p1
        self.pp = p1 + d/2 + d.n * (d.len * 0.8)

    def __call__(self, t):
        ret = (self.p1 - self.pp*2 + self.p2) * t**2
        ret += (self.p1 * -2 + self.pp * 2) * t
        ret += self.p1
        return ret
 


class Box():
    def __init__(self, pos, size, hue, swaptime, content=None,
                 contentcolor=None):
        self.pos, self.size, self.hue, self.content, self.contentcolor = \
            pos, size, hue, content, contentcolor
        self.swaptime = swaptime
        self.covered = False
        self.swapstart = None
        self.newpos = None
        self.cf = None
        self.colorcycletime = 1

    def swap(self, other):
        self.newpos = other.pos
        other.newpos = self.pos

    def update(self, t, dt):
        self.hue += 0.05 # dt / self.colorcycletime
        if self.hue > 1:
            self.hue -= 1
        if self.newpos is not None:
            if self.cf is None:
                self.cf = CurveFunction(self.pos, self.newpos)
                self.swapstart = t
            elif t - self.swapstart >= self.swaptime:
                self.pos = self.newpos
                self.newpos = None
                self.cf = None
                self.swapstart = None
            else:
                self.pos = (self.cf((t - self.swapstart) / self.swaptime)).intp

    def draw(self, frame):
        if self.covered:
            for x in range(self.size):
                for y in range(self.size):
                    if x == 0 or x == self.size - 1 \
                       or y == 0 or y == self.size -1:
                        color = (0.2, 0.2, 0.2)
                    else:
                        color = colorsys.hsv_to_rgb(self.hue, 1, 1)
                    try:
                        frame.setPixel(self.pos.x + x, self.pos.y + y,
                                       convert_color(color))
                    except ValueError:
                        pass
        else:
            if self.content is not None:
                for p in self.content:
                    try:
                        frame.setPixel(self.pos.x + p.x + 1,
                                       self.pos.y + p.y + 1,
                                       convert_color(self.contentcolor))
                    except ValueError:
                        pass


class Game():
    def __init__(self, size, boxsize, gap, content, contentcolor, swaptime):
        self.swaptime = swaptime
        self.boxes = []
        boxbase = Point((size.x - (2*boxsize + gap)) / 2,
                        (size.y - (2*boxsize + gap)) / 2)
        self.n_boxes = 4
        for i in range(self.n_boxes):
            boxpos = boxbase + Point(
                (i % (self.n_boxes/2)) * (boxsize + gap),
                (i // (self.n_boxes/2)) * (boxsize + gap)
            )
            self.boxes.append(Box(
                boxpos.intp,
                boxsize,
                i * (1/self.n_boxes),
                swaptime
            ))
        winner = random.randint(0, self.n_boxes - 1)
        self.boxes[winner].content = content
        self.boxes[winner].contentcolor = contentcolor
        self.statetimes = [2, 1, 5, 2, 1, 2]
        self.statestarts = [0]
        for t in self.statetimes[:-1]:
            self.statestarts.append(self.statestarts[-1] + t)
        self.done = False

    def update(self, t, dt):
        state = 0
        for i, st in enumerate(self.statestarts):
            if st < t:
                state = i
            else:
                break
        state_t = t - self.statestarts[state]

        if state == 1 or state == 4:
            for i, b in enumerate(self.boxes):
                if state_t >= i * (self.statetimes[state] / self.n_boxes):
                    b.covered = (state == 1)
        elif state == 2:
            if True not in map(lambda b: b.newpos is not None, self.boxes) \
               and random.random() > 0.2:
                b1 = random.randint(0, self.n_boxes - 1)
                b2 = random.randint(0, self.n_boxes - 1)
                while b1 == b2:
                    b2 = random.randint(0, self.n_boxes - 1)
                self.boxes[b1].swap(self.boxes[b2])

        if state > 0 and state < 5:
            for b in self.boxes:
                b.update(t, dt)

        if state == len(self.statetimes) - 1:
            self.done = True

    def draw(self, frame):
        for b in self.boxes:
            if b.newpos is None:
                b.draw(frame)
        for b in self.boxes:
            if b.newpos is not None:
                b.draw(frame)


BOXCONTENT = {
    Point(0, 0),
    Point(3, 0),
    Point(0, 2),
    Point(3, 2),
    Point(1, 3),
    Point(2, 3),
}


if __name__ == '__main__':
    parser = argparse.ArgumentParser(description='Generate animations')
    parser.add_argument('-d', '--delay', type=int, default=50)
    parser.add_argument('-t', '--time', type=int, default=15)
    parser.add_argument('output_file')
    args = parser.parse_args()

    dim = blup.frame.FrameDimension(WIDTH, HEIGHT, DEPTH, 3)
    anim = blup.animation.Animation(dim)
    anim.tags['description'] = ' '.join(sys.argv)


    t = 0
    dt = args.delay / 1000
    gamestart = 0
    game = None
    while t < args.time or not game.done:
        t += dt
        frame = blup.animation.AnimationFrame(dim, args.delay)

        if (game is None or game.done) and t < args.time:
            game = Game(Point(WIDTH, HEIGHT), 6, 2, BOXCONTENT,
                        get_random_color(), 0.5)
            gamestart = t
        game.update(t - gamestart, dt)
        game.draw(frame)

        anim.addFrame(frame)


    blup.writebml.writeBml(anim, args.output_file)