103 lines
3.1 KiB
Python
103 lines
3.1 KiB
Python
# -*- coding: utf-8 -*-
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# characters.py - module for shared functions and macros
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# This file is part of brutalmaze
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#
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# brutalmaze is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# brutalmaze is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with brutalmaze. If not, see <http://www.gnu.org/licenses/>.
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#
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# Copyright (C) 2017 Nguyễn Gia Phong
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__doc__ = 'brutalmaze module for hero and enemy classes'
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from functools import reduce
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from math import cos, sin, pi
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from operator import or_
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from random import uniform
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import pygame
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from pygame.gfxdraw import filled_polygon, aapolygon
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from .constants import MIDDLE
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def some(a, keys):
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"""Return True if there is a key k in keys that bool(a[k]) is True."""
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return bool(reduce(or_, (a[k] for k in keys)))
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def round2(number):
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"""Round a number to an int."""
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return int(round(number))
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def randsign():
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"""Return either -1 or 1 (kind of) randomly."""
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return (pygame.time.get_ticks() & 1)*2 - 1
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def regpoly(n, R, r, x, y):
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"""Return the pointlist of the regular polygon with n sides,
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circumradius of R, the center point I(x, y) and one point A make the
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vector IA with angle r (in radians).
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"""
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r %= pi * 2
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angles = [r + pi*2*side/n for side in range(n)]
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return [(x + R*cos(angle), y + R*sin(angle)) for angle in angles]
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def fill_aapolygon(surface, points, color):
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"""Draw a filled polygon with anti aliased edges onto a surface."""
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aapolygon(surface, points, color)
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filled_polygon(surface, points, color)
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def sign(n):
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"""Return the sign of number n."""
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return -1 if n < 0 else 1 if n else 0
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def cosin(x):
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"""Return the sum of cosine and sine of x (measured in radians)."""
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return cos(x) + sin(x)
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def choices(d):
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"""Choose a random key from a dict which has values being relative
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weights of the coresponding keys.
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"""
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population, weights = tuple(d.keys()), tuple(d.values())
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cum_weights = [weights[0]]
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for weight in weights[1:]: cum_weights.append(cum_weights[-1] + weight)
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num = uniform(0, cum_weights[-1])
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for i, w in enumerate(cum_weights):
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if num <= w: return population[i]
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def play(sound, volume=1.0, angle=None):
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"""Play a pygame.mixer.Sound at the given volume."""
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if pygame.mixer.find_channel() is None:
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pygame.mixer.set_num_channels(pygame.mixer.get_num_channels() + 1)
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channel = sound.play()
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if angle is None:
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channel.set_volume(volume)
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else:
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delta = cos(angle)
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volumes = [volume * (1-delta), volume * (1+delta)]
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for i, v in enumerate(volumes):
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if v > 1:
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volumes[i - 1] += v - 1
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volumes[i] = 1.0
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sound.set_volume(1.0)
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channel.set_volume(*volumes)
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