Video Games

from pygame import Color, Surface, draw, PixelArray

from xenographic_wall.pgfw.GameChild import GameChild

class Ring(GameChild, Surface):

    transparent_color = Color("magenta")

    def __init__(self, parent, index):
        GameChild.__init__(self, parent)
        self.index = index
        self.init_surface()
        self.draw_circle()

    def init_surface(self):
        config = self.get_configuration("scope")
        ring_count = config["ring-count"]
        width = config["diameter"] / ring_count * (ring_count - self.index)
        Surface.__init__(self, (width, width))
        color = self.transparent_color
        self.fill(color)
        self.set_colorkey(color)
        rect = self.get_rect()
        rect.center = self.parent.center
        self.rect = rect

    def draw_circle(self):
        radius = self.get_width() / 2
        draw.circle(self, self.get_neutral_color(), (radius, radius), radius)

    def get_neutral_color(self):
        return Color(self.get_configuration("scope", "neutral-color"))

    def set_color(self, color):
        pixels = PixelArray(self)
        center = self.get_rect().center
        current = pixels[center[0]][center[1]]
        pixels.replace(current, color)
        del pixels

    def get_alpha(self):
        return self.alpha

    def set_alpha(self, alpha):
        self.alpha = alpha
        Surface.set_alpha(self, int(alpha))

    def update(self):
        self.draw()

    def draw(self):
        self.parent.parent.parent.blit(self, self.rect)

from xenographic_wall.pgfw.GameChild import GameChild
from xenographic_wall.creatures.Creature import Creature

class Creatures(GameChild, list):

    def __init__(self, parent):
        GameChild.__init__(self, parent)

    def reset(self):
        list.__init__(self, [])
        self.populate()
        for creature in self:
            creature.reset()

    def populate(self):
        self.append(Creature(self, 3, 1))
        self.append(Creature(self, 3, 2))
        self.append(Creature(self, 3, 3))
        self.append(Creature(self, 3, 4))
        self.append(Creature(self, 3, 5))
        self.append(Creature(self, 3, 6))

    def update(self):
        for creature in self:
            creature.update()

from re import search
from os import listdir
from os.path import join, basename
from glob import glob
from time import time
from random import randrange
from math import atan, sin, cos, sqrt, copysign

from pygame import Surface, image, Color

from xenographic_wall.pgfw.GameChild import GameChild

class Creature(GameChild, Surface):

    transparent_color = Color("magenta")
    
    def __init__(self, parent, genus_id, species_id):
        GameChild.__init__(self, parent)
        self.genus_id = genus_id
        self.species_id = species_id
        self.current_frame_index = 0
        self.last_advance = 0
        self.load_frames()
        self.read_stats()
        self.init_surface()
        self.reset()

    def load_frames(self):
        frames = []
        root = self.build_species_dir()
        for path in sorted(glob(join(root, "*.png"))):
            frames.append(Frame(self, path))
        self.frames = frames
        self.rect = frames[0].get_rect()

    def build_species_dir(self):
        root = self.get_resource("creature", "root")
        genus_dir = glob(join(root, "{0}*".format(self.genus_id)))[0]
        return glob(join(genus_dir, "{0}*".format(self.species_id)))[0]

    def read_stats(self):
        path = join(self.build_species_dir(),
                    self.get_configuration("creature", "stat-file"))
        duration, food, speed = file(path).read().split()
        self.eat_duration = int(duration)
        self.food = int(food)
        self.speed = float(speed)

    def init_surface(self):
        Surface.__init__(self, self.frames[0].get_size())
        self.set_colorkey(self.transparent_color)

    def reset(self):
        self.place()
        self.finish_eating()
        self.update_nearest_mushroom()

    def finish_eating(self):
        self.eat_start_time = None

    def update_nearest_mushroom(self):
        mushrooms = self.get_mushrooms()
        food = self.food
        available = mushrooms[food]
        nearest = None
        for mushroom in available:
            if not mushroom.eaten:
                distance = self.get_distance_to_mushroom(mushroom)
                if not nearest or distance < nearest_distance:
                    nearest = mushroom
                    nearest_distance = distance
        if not nearest:
            nearest = mushrooms.add_mushroom(food)
        self.nearest_mushroom = nearest
        self.set_path()

    def get_mushrooms(self):
        return self.parent.parent.mushrooms

    def get_distance_to_mushroom(self, mushroom):
        start = self.rect.center
        end = mushroom.rect.center
        return sqrt((end[0] - start[0]) ** 2 + (end[1] - start[1]) ** 2)

    def set_path(self):
        speed = self.speed
        start = self.rect.center
        end = self.nearest_mushroom.rect.center
        x_distance = end[0] - start[0]
        y_distance = end[1] - start[1]
        if not x_distance and not y_distance:
            dx, dy = 0, 0
        elif not x_distance:
            dx, dy = 0, speed
        elif not y_distance:
            dx, dy = speed, 0
        else:
            angle = atan(float(x_distance) / y_distance)
            dx = sin(angle) * speed
            dy = cos(angle) * speed
        self.dx = abs(dx) * copysign(1, x_distance)
        self.dy = abs(dy) * copysign(1, y_distance)
        self.x_travelled = 0
        self.y_travelled = 0
        self.path_start = start

    def place(self):
        area = self.parent.parent.get_rect()
        self.rect.topleft = randrange(area.w), randrange(area.h)

    def update(self):
        self.clear()
        self.advance_frame()
        self.confirm_nearest_mushroom()
        self.eat_mushroom()
        self.continue_eating()
        self.move()
        self.draw()

    def clear(self):
        self.fill(self.transparent_color)

    def advance_frame(self):
        current_time = time()
        duration = (current_time - self.last_advance) * 100
        if duration > self.get_current_frame().duration:
            index = self.current_frame_index + 1
            if index >= len(self.frames):
                index = 0
            self.last_advance = current_time
            self.current_frame_index = index

    def get_current_frame(self):
        return self.frames[self.current_frame_index]

    def confirm_nearest_mushroom(self):
        if not self.is_eating() and self.nearest_mushroom.eaten:
            self.update_nearest_mushroom()

    def eat_mushroom(self):
        location = self.nearest_mushroom.rect
        if not self.is_eating() and self.rect.colliderect(location):
            self.eat_start_time = time()
            self.nearest_mushroom.eat()

    def is_eating(self):
        return self.eat_start_time is not None

    def continue_eating(self):
        if self.is_eating():
            duration = (time() - self.eat_start_time) * 1000
            nearest = self.nearest_mushroom
            limit = self.eat_duration
            if duration > limit:
                self.get_mushrooms().replace_mushroom(nearest)
                self.update_nearest_mushroom()
                self.finish_eating()
            elif duration >= limit / 2 and not nearest.bitten:
                nearest.bite()

    def move(self):
        if not self.is_eating():
            rect = self.rect
            destination = self.nearest_mushroom
            remaining = self.get_distance_to_mushroom(destination)
            if remaining < self.speed:
                rect.center = destination.center
            else:
                self.x_travelled += self.dx
                self.y_travelled += self.dy
                start = self.path_start
                rect.centerx = start[0] + self.x_travelled
                rect.centery = start[1] + self.y_travelled
            self.contain()

    def contain(self):
        rect = self.rect
        area = self.parent.parent.get_rect()
        if rect.bottom > area.bottom:
            rect.bottom = area.bottom
        elif rect.top < area.top:
            rect.top = area.top
        if rect.right > area.right:
            rect.right = area.right
        elif rect.left < area.left:
            rect.left = area.left

    def draw(self):
        self.blit(self.get_current_frame().image, (0, 0))
        self.parent.parent.blit(self, self.rect)


class Frame(GameChild):

    def __init__(self, parent, path):
        GameChild.__init__(self, parent)
        self.path = path
        self.set_image()
        self.set_duration()

    def set_image(self):
        self.image = image.load(self.path).convert_alpha()

    def set_duration(self):
        separator = self.get_configuration("creature", "field-separator")
        self.duration = int(search(separator + "(.*)\.",
                                   basename(self.path)).group(1))

    def get_rect(self):
        return self.image.get_rect()

    def get_size(self):
        return self.image.get_size()

216.73.216.24

June 29, 2013♦

A few weeks ago, for Fishing Jam, I made a fishing simulation from what was originally designed to be a time attack arcade game. In the program, Dark Stew, the player controls Aphids, an anthropod who fishes for aquatic creatures living in nine pools of black water.

Fishing means waiting by the pool with the line in. The longer you wait before pulling the line out, the more likely a creature will appear. Aside from walking, it's the only interaction in the game. The creatures are drawings of things you maybe could find underwater in a dream.

The background music is a mix of clips from licensed to share songs on the Free Music Archive. Particularly, Seed64 is an album I used a lot of songs from. The full list of music credits is in the game's README file.

I'm still planning to use the original design in a future version. There would be a reaction-based mini game for catching fish, and the goal would be to catch as many fish as possible within the time limit. I also want to add details and obstacles to the background, which is now a little boring, being a plain, tiled, white floor.

If you want to look at all the drawings or hear the music in the context of the program, there are Windows and source versions available. The source should work on any system with Python and Pygame. If it doesn't, bug reports are much appreciated. Comments are also welcome :)

Dark Stew: Windows, Pygame Source

I wrote in my last post that I would be working on an old prototype about searching a cloud for organisms for Fishing Jam. I decided to wait a while before developing that game, tentatively titled Xenographic Barrier. Its main interactive element is a first-person scope/flashlight, so I'd like to make a Wii version of it.

I'm about to start working on a complete version of Ball & Cup. If I make anything interesting for it, I'll post something. There are a lot of other things I want to write about, like game analyses, my new GP2X and arcades in Korea, and there's still music to release. Lots of fun stuff coming!

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