Make enemies chase the hero
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@ -19,6 +19,7 @@
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from collections import deque
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from math import atan2, cos, sin, pi
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from random import shuffle
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import pygame
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from pygame.gfxdraw import filled_polygon, aapolygon
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@ -31,7 +32,7 @@ def randsign():
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return (pygame.time.get_ticks() & 1)*2 - 1
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def regpoly(n, R, x, y, r):
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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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@ -52,6 +53,11 @@ def pos(x, y, distance, middlex, middley):
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return middlex + (x - MIDDLE)*distance, middley + (y - MIDDLE)*distance
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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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class Hero:
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"""Object representing the hero."""
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def __init__(self, surface):
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@ -75,7 +81,7 @@ class Hero:
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def draw(self, color=None):
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"""Draw the hero."""
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trigon = regpoly(3, self.R, self.x, self.y, self.angle)
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trigon = regpoly(3, self.R, self.angle, self.x, self.y)
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fill_aapolygon(self.surface, trigon, color or self.color[self.wound])
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def update(self):
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@ -100,38 +106,58 @@ class Hero:
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class Enemy:
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"""Object representing an enemy."""
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def __init__(self, surface, n, x, y):
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self.surface = surface
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self.x, self.y = x, y
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def __init__(self, surface, maze, n, x, y):
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self.surface, self.maze = surface, maze
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self.angle, self.color = pi / 4, TANGO[TANGO_KEYS[n]]
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self.x, self.y = x, y
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self.awake, self.moving = False, False
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self.wound = 0
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self.awake = False
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self.offsetx = self.offsety = 0
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self.spin_queue = []
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self.speed = FPS // len(self.color)
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self.spin_queue, self.slashing = deque(), False
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self.wound = 0
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def draw(self, distance, middlex, middley, color=None):
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"""Draw the enemy, given distance between grids and the middle
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grid.
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"""
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"""Draw the enemy, given distance between grids and the middle grid."""
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x, y = pos(self.x, self.y, distance, middlex, middley)
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square = regpoly(4, int(distance / SQRT2), x, y, self.angle)
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step = distance // 5
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square = regpoly(4, int(distance / SQRT2), self.angle,
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x + self.offsetx*step, y + self.offsety*step)
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fill_aapolygon(self.surface, square, color or self.color[self.wound])
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def update(self, distance, middlex, middley):
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"""Update the enemy."""
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if (self.angle - pi/4) < EPSILON: self.angle = pi / 4
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self.draw(distance, middlex, middley, color=BG_COLOR)
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if self.awake and not self.spin_queue:
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self.spin_queue.extend([randsign()] * self.speed)
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if self.spin_queue and not self.moving:
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self.angle += self.spin_queue.popleft() * pi / 2 / self.speed
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self.draw(distance, middlex, middley)
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def place(self, x, y):
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def place(self, x=0, y=0):
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"""Move the enemy by (x, y)."""
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self.x += x
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self.y += y
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def move(self, x, y):
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"""Command the enemy to move by (x, y)."""
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def move(self):
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"""Handle the movement of the enemy.
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Return True if it moved, False otherwise.
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"""
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if self.offsetx:
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self.offsetx -= sign(self.offsetx)
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return True
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if self.offsety:
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self.offsety -= sign(self.offsety)
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return True
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directions = [(sign(MIDDLE - self.x), 0), (0, sign(MIDDLE - self.y))]
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shuffle(directions)
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for x, y in directions:
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if (x or y) and self.maze[self.x + x][self.y + y] == False:
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self.offsetx = x * -4
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self.offsety = y * -4
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self.place(x, y)
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return True
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return False
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def update(self, distance, middlex, middley):
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"""Update the enemy."""
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if self.awake:
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self.draw(distance, middlex, middley, color=BG_COLOR)
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if not self.spin_queue and not self.move():
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self.spin_queue.extend([randsign()] * self.speed)
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if self.spin_queue:
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self.angle += self.spin_queue.pop() * pi / 2 / self.speed
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self.draw(distance, middlex, middley)
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@ -20,7 +20,6 @@
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from pygame.locals import *
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from pygame.math import Vector2
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EPSILON = 8 ** -8
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SQRT2 = 2 ** 0.5
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FPS = 30
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@ -23,15 +23,10 @@ from random import getrandbits
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import pygame
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from .characters import pos, regpoly, fill_aapolygon, Hero, Enemy
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from .characters import pos, sign, regpoly, fill_aapolygon, Hero, Enemy
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from .constants import *
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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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@ -49,10 +44,6 @@ class Maze:
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self.rangex = range(MIDDLE - w, MIDDLE + w + 1)
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self.rangey = range(MIDDLE - h, MIDDLE + h + 1)
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self.hero = Hero(self.surface)
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self.enemies = [Enemy(self.surface, 4, 34, 34)]
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self.right = self.down = self.offsetx = self.offsety = 0
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def wall(bit, upper=True):
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if bit: return deque([True]*ROAD_WIDTH + [False]*ROAD_WIDTH)
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if upper: return deque([True] * (ROAD_WIDTH<<1))
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@ -67,6 +58,9 @@ class Maze:
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lower.extend(wall(b, False))
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for _ in range(ROAD_WIDTH): self.map.append(upper.__copy__())
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for _ in range(ROAD_WIDTH): self.map.append(lower.__copy__())
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self.hero = Hero(self.surface)
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self.enemies = [Enemy(self.surface, self.map, 4, 34, 34)]
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self.right = self.down = self.offsetx = self.offsety = 0
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self.draw()
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def draw(self):
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@ -76,7 +70,7 @@ class Maze:
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for j in self.rangey:
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if not self.map[i][j]: continue
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x, y = pos(i, j, self.distance, self.middlex, self.middley)
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square = regpoly(4, int(self.distance / SQRT2), x, y, pi / 4)
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square = regpoly(4, int(self.distance / SQRT2), pi / 4, x, y)
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fill_aapolygon(self.surface, square, FG_COLOR)
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def wake(self, enemy):
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@ -120,16 +114,18 @@ class Maze:
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modified = True
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if modified:
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self.map[MIDDLE][MIDDLE] = False
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if abs(self.offsetx) == 5:
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s = sign(self.offsetx)
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self.offsetx = 0
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self.map.rotate(s)
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for enemy in self.enemies: enemy.place(s, 0)
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for enemy in self.enemies: enemy.place(x=s)
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if abs(self.offsety) == 5:
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s = sign(self.offsety)
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self.offsety = 0
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for d in self.map: d.rotate(s)
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for enemy in self.enemies: enemy.place(0, s)
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for enemy in self.enemies: enemy.place(y=s)
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self.map[MIDDLE][MIDDLE] = None
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self.middlex = self.x + self.offsetx*self.step
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self.middley = self.y + self.offsety*self.step
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