Mercurial > nagslang

annotate nagslang/enemies.py @ 598:e65d59081bdd

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Quieter sound.
author Simon Cross <hodgestar@gmail.com>
date Sat, 07 Sep 2013 23:43:20 +0200
parents 400f52d4279d
children 28af98fe38d7
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 import math
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2 import random
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3
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4 import pymunk
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5 import pymunk.pygame_util
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6
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42e8993c31fd Break out Renderers
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7 from nagslang import render
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8 from nagslang.constants import (
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9 COLLISION_TYPE_ENEMY, COLLISION_TYPE_FURNITURE, COLLISION_TYPE_SHEEP,
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10 ACID_SPEED, ACID_DAMAGE, ZORDER_MID)
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11 from nagslang.game_object import (GameObject, SingleShapePhysicser, Result,
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12 Bullet, make_body)
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13 from nagslang.mutators import FLIP_H
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14 from nagslang.resources import resources
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15 from nagslang.utils import vec_with_length
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16
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17
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18 def get_editable_enemies():
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19 classes = []
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20 for cls_name, cls in globals().iteritems():
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21 if isinstance(cls, type) and issubclass(cls, Enemy):
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22 if hasattr(cls, 'requires'):
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23 classes.append((cls_name, cls))
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24 return classes
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25
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26
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27 def get_alien_image(enemy_type, suffix, *transforms):
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28 image_name = 'alien_%s_%s.png' % (enemy_type, suffix)
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29 return resources.get_image('creatures', image_name, transforms=transforms)
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30
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31
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32 class Enemy(GameObject):
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33 """A base class for mobile enemies"""
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34 zorder = ZORDER_MID
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35 enemy_type = None # Which set of images to use
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36 enemy_damage = None
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37 health = None
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38 impulse_factor = None
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39 random_move_time = 0.3
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40
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56e42c00da25 Protagonist and enemies should see the world
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41 def __init__(self, space, world, position):
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42 super(Enemy, self).__init__(
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43 self.make_physics(space, position), self.make_renderer())
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44 self.world = world
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45 self.angle = 0
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46 self.add_timer('random_move', self.random_move_time)
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47 self._last_random_direction = (0, 0)
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48
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49 def make_physics(self, space, position):
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50 raise NotImplementedError
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51
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52 def make_renderer(self):
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53 return render.FacingSelectionRenderer({
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54 'left': render.TimedAnimatedRenderer(
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55 [get_alien_image(self.enemy_type, '1'),
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56 get_alien_image(self.enemy_type, '2')], 3),
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57 'right': render.TimedAnimatedRenderer(
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58 [get_alien_image(self.enemy_type, '1', FLIP_H),
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59 get_alien_image(self.enemy_type, '2', FLIP_H)], 3),
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60 })
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61
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62 def get_render_angle(self):
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63 # No image rotation when rendering, please.
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64 return 0
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65
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66 def get_facing_direction(self):
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67 # Enemies can face left or right.
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68 if - math.pi / 2 < self.angle <= math.pi / 2:
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69 return 'right'
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70 else:
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71 return 'left'
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72
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73 def hit(self, weapon):
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74 self.lose_health(weapon.damage)
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75
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76 def lose_health(self, amount):
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77 self.health -= amount
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78 if self.health <= 0:
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79 self.world.kills += 1
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80 self.physicser.remove_from_space()
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81
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82 def set_direction(self, dx, dy, force_factor=1):
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83 vec = vec_with_length((dx, dy), self.impulse_factor * force_factor)
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84 self.angle = vec.angle
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85 self.physicser.apply_impulse(vec)
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86
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87 def collide_with_protagonist(self, protagonist):
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88 if self.enemy_damage is not None:
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89 protagonist.lose_health(self.enemy_damage)
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90
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91 def collide_with_claw_attack(self, claw_attack):
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92 self.lose_health(claw_attack.damage)
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93
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94 def range_to_visible_protagonist(self):
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95 """Get a vector to the protagonist if there are no barriers in between.
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96
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97 Returns a vector to the protagonist if she is within line of sight,
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98 otherwise `None`
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99 """
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100
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101 pos = self.physicser.position
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102 target = self.world.protagonist.get_shape().body.position
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103
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104 for collision in self.get_space().segment_query(pos, target):
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105 shape = collision.shape
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106 if (shape in (self.get_shape(), self.world.protagonist.get_shape())
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107 or shape.sensor):
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108 continue
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109 return None
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110 return target - pos
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111
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112 def ranged_attack(self, range_, speed, damage, type_, reload_time, result):
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113 vec = self.range_to_visible_protagonist()
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114 if vec is None:
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115 return
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116
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117 if not self.check_timer('reload_time'):
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118 self.start_timer('reload_time', reload_time)
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119 if vec.length < range_:
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120 vec.length = speed
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121 result.add += (Bullet(
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122 self.get_space(), self.physicser.position, vec, damage,
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123 type_, COLLISION_TYPE_ENEMY),)
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124
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125 def greedy_move(self, target):
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126 """Simple greedy path finder"""
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127 def _calc_step(tp, pp):
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128 step = 0
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129 if (tp < pp):
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130 step = max(-1, tp - pp)
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131 elif (tp > pp):
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132 step = min(1, tp - pp)
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133 if abs(step) < 0.5:
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134 step = 0
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135 return step
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136 x_step = _calc_step(target[0], self.physicser.position[0])
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137 y_step = _calc_step(target[1], self.physicser.position[1])
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138 return (x_step, y_step)
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139
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140 def random_move(self):
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141 """Random move"""
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142 if not self.check_timer('random_move'):
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143 self.start_timer('random_move')
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144 self._last_random_direction = (
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145 random.choice([-1, 0, 1]), random.choice([-1, 0, 1]))
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diff changeset
146 return self._last_random_direction
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147
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148 def attack(self, result):
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149 pass
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150
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151 def move(self, result):
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152 pass
368
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153
385
51deb78cae52 Use a result object to get new drawables back to the area
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diff changeset
154 def update(self, dt):
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diff changeset
155 super(Enemy, self).update(dt)
393
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156 result = Result()
385
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diff changeset
157 if self.health <= 0:
393
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diff changeset
158 result.remove += (self,)
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159 result.add += (DeadEnemy(self.get_space(), self.world,
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diff changeset
160 self.physicser.position,
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diff changeset
161 self.enemy_type),)
410
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diff changeset
162 self.move(result)
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diff changeset
163 self.attack(result)
393
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164 return result
385
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diff changeset
165
410
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diff changeset
166 @classmethod
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167 def requires(cls):
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168 return [("name", "string"), ("position", "coordinates")]
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169
308
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170
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171 class DeadEnemy(GameObject):
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172 def __init__(self, space, world, position, enemy_type='A'):
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173 body = make_body(10, 10000, position, damping=0.5)
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174 self.shape = pymunk.Poly(
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175 body, [(-20, -20), (20, -20), (20, 20), (-20, 20)])
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176 self.shape.friction = 0.5
318
26d1978fa1da BOX is no longer accurate
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177 self.shape.collision_type = COLLISION_TYPE_FURNITURE
308
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178 super(DeadEnemy, self).__init__(
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179 SingleShapePhysicser(space, self.shape),
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180 render.ImageRenderer(resources.get_image(
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181 'creatures', 'alien_%s_dead.png' % enemy_type)),
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182 )
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183
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184 @classmethod
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185 def requires(cls):
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186 return [("name", "string"), ("position", "coordinates")]
305
ce11e1cae0ed Enemies now die
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187
168
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188
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189 class PatrollingAlien(Enemy):
218
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parents: 217
diff changeset
190 is_moving = True # Always walking.
308
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191 enemy_type = 'A'
334
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192 health = 42
341
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193 enemy_damage = 15
334
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194 impulse_factor = 50
168
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195
277
56e42c00da25 Protagonist and enemies should see the world
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diff changeset
196 def __init__(self, space, world, position, end_position):
168
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197 # An enemy that patrols between the two points
277
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198 super(PatrollingAlien, self).__init__(space, world, position)
168
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199 self._start_pos = position
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200 self._end_pos = end_position
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201 self._direction = 'away'
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202
334
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diff changeset
203 def make_physics(self, space, position):
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204 body = make_body(10, pymunk.inf, position, 0.8)
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205 shape = pymunk.Circle(body, 30)
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206 shape.elasticity = 1.0
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207 shape.friction = 0.05
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208 shape.collision_type = COLLISION_TYPE_ENEMY
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diff changeset
209 return SingleShapePhysicser(space, shape)
168
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210
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211 def _switch_direction(self):
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diff changeset
212 if self._direction == 'away':
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213 self._direction = 'towards'
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214 else:
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215 self._direction = 'away'
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216
410
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diff changeset
217 def move(self, result):
168
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218 if self._direction == 'away':
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219 target = self._end_pos
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220 else:
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221 target = self._start_pos
368
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diff changeset
222 x_step, y_step = self.greedy_move(target)
168
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223 if abs(x_step) < 1 and abs(y_step) < 1:
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224 self._switch_direction()
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225 self.set_direction(x_step, y_step)
410
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diff changeset
226
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diff changeset
227 def attack(self, result):
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diff changeset
228 self.ranged_attack(300, ACID_SPEED, ACID_DAMAGE, 'acid', 0.2, result)
258
083053422a84 Added collision damage with enemies.
David Sharpe
parents: 235
diff changeset
229
235
831e4f6b3d18 Add hints for the level editor
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parents: 229
diff changeset
230 @classmethod
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parents: 229
diff changeset
231 def requires(cls):
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parents: 229
diff changeset
232 return [("name", "string"), ("position", "coordinates"),
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parents: 229
diff changeset
233 ("end_position", "coordinates")]
278
e72025e9aa07 simple slow charging alien
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parents: 277
diff changeset
234
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parents: 277
diff changeset
235
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diff changeset
236 class ChargingAlien(Enemy):
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diff changeset
237 # Simplistic charging of the protagonist
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diff changeset
238 is_moving = False
308
3dee86b6c216 Enemies leave corpses
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diff changeset
239 enemy_type = 'B'
334
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diff changeset
240 health = 42
341
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parents: 334
diff changeset
241 enemy_damage = 20
334
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diff changeset
242 impulse_factor = 300
278
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parents: 277
diff changeset
243
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parents: 277
diff changeset
244 def __init__(self, space, world, position, attack_range=100):
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diff changeset
245 super(ChargingAlien, self).__init__(space, world, position)
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parents: 277
diff changeset
246 self._range = attack_range
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diff changeset
247
334
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diff changeset
248 def make_physics(self, space, position):
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diff changeset
249 body = make_body(100, pymunk.inf, position, 0.8)
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diff changeset
250 shape = pymunk.Circle(body, 30)
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diff changeset
251 shape.elasticity = 1.0
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diff changeset
252 shape.friction = 0.05
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diff changeset
253 shape.collision_type = COLLISION_TYPE_ENEMY
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diff changeset
254 return SingleShapePhysicser(space, shape)
278
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parents: 277
diff changeset
255
410
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parents: 409
diff changeset
256 def move(self, result):
334
a3f1b2f0e3fb Physics-related cleanup.
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parents: 333
diff changeset
257 pos = self.physicser.position
278
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parents: 277
diff changeset
258 target = self.world.protagonist.get_shape().body.position
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parents: 277
diff changeset
259 if pos.get_distance(target) > self._range:
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parents: 277
diff changeset
260 # stop
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parents: 277
diff changeset
261 self.is_moving = False
368
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parents: 366
diff changeset
262 return 0, 0
278
e72025e9aa07 simple slow charging alien
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parents: 277
diff changeset
263 self.is_moving = True
368
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parents: 366
diff changeset
264 dx, dy = self.greedy_move(target)
410
d7bd9adb105a Sheep! (And refactoring!)
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parents: 409
diff changeset
265 self.set_direction(dx, dy)
368
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parents: 366
diff changeset
266
410
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parents: 409
diff changeset
267 def attack(self, result):
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parents: 409
diff changeset
268 self.ranged_attack(300, ACID_SPEED, ACID_DAMAGE, 'acid', 0.2, result)
278
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parents: 277
diff changeset
269
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parents: 277
diff changeset
270 @classmethod
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parents: 277
diff changeset
271 def requires(cls):
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parents: 277
diff changeset
272 return [("name", "string"), ("position", "coordinates"),
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parents: 277
diff changeset
273 ("attack_range", "distance")]
368
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parents: 366
diff changeset
274
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diff changeset
275
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diff changeset
276 class RunAndGunAlien(ChargingAlien):
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parents: 366
diff changeset
277 # Simplistic shooter
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diff changeset
278 # Move until we're in range, and then randomly
500
6ca8fc93a40d split out first alien chamber
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parents: 453
diff changeset
279 enemy_type = "C"
368
57895217bd74 Start refactoring alien movement
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parents: 366
diff changeset
280 impulse_factor = 90
500
6ca8fc93a40d split out first alien chamber
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parents: 453
diff changeset
281 health = 42
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diff changeset
282 enemy_damage = 25
368
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diff changeset
283 is_moving = True
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diff changeset
284
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diff changeset
285 def make_physics(self, space, position):
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diff changeset
286 body = make_body(10, pymunk.inf, position, 0.8)
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diff changeset
287 shape = pymunk.Circle(body, 30)
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diff changeset
288 shape.elasticity = 1.0
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diff changeset
289 shape.friction = 0.05
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diff changeset
290 shape.collision_type = COLLISION_TYPE_ENEMY
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diff changeset
291 return SingleShapePhysicser(space, shape)
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diff changeset
292
410
d7bd9adb105a Sheep! (And refactoring!)
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parents: 409
diff changeset
293 def move(self, result):
368
57895217bd74 Start refactoring alien movement
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diff changeset
294 pos = self.physicser.position
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295 target = self.world.protagonist.get_shape().body.position
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296 if pos.get_distance(target) < self._range:
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297 step = self.random_move()
368
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298 else:
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299 step = self.greedy_move(target)
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300 self.set_direction(*step)
368
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301
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302 @classmethod
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303 def requires(cls):
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304 return [("name", "string"), ("position", "coordinates"),
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305 ("attack_range", "distance")]
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306
553
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307
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308 class Queen(RunAndGunAlien):
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309 enemy_type = "queen"
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310 impulse_factor = 180
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311 health = 500
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312 enemy_damage = 50
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313 is_moving = True
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314 spawn_time = 10
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315 spawn_size = 5
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316 spawn_class = ChargingAlien
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317 spawn_class_args = (200,)
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318
553
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319 def __init__(self, space, world, position, attack_range=100):
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320 super(Queen, self).__init__(space, world, position, attack_range)
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321 self.add_timer('spawn', self.spawn_time)
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322
553
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323 def spawn(self, result):
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324 if not self.check_timer('spawn'):
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325 self.start_timer('spawn', self.spawn_time)
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326 for i in range(self.spawn_size):
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327 result.add += (self.spawn_class(self.get_space(),
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328 self.world, self.physicser.position,
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329 *self.spawn_class_args),)
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330
553
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331 def attack(self, result):
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332 self.ranged_attack(300, ACID_SPEED, ACID_DAMAGE, 'acid', 1, result)
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333
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334 def update(self, dt):
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335 result = super(Queen, self).update(dt)
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336 self.spawn(result)
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337 return result
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338
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339 @classmethod
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340 def requires(cls):
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341 return [("name", "string"), ("position", "coordinates"),
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342 ("attack_range", "distance")]
410
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343
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344
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345 class Sheep(Enemy): # Only because we don't have a DeliciousCreature class.
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346 is_moving = True # Always walking.
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347 enemy_type = 'sheep'
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348 health = 10
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349 impulse_factor = 50
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350
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351 human_vision_range = 100
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352 wolf_vision_range = 200
410
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353
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354 def make_physics(self, space, position):
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355 body = make_body(10, pymunk.inf, position, 0.8)
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356 shape = pymunk.Circle(body, 30)
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357 shape.elasticity = 1.0
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358 shape.friction = 0.05
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359 shape.collision_type = COLLISION_TYPE_SHEEP
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360 return SingleShapePhysicser(space, shape)
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361
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362 def move(self, result):
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363 vec = self.range_to_visible_protagonist()
415
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364 prot = self.world.protagonist
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365 if vec is not None:
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366 if prot.in_human_form() and vec.length < self.human_vision_range:
446
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367 self.set_direction(vec.x, vec.y, 1.5)
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368 return
415
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369 if prot.in_wolf_form() and vec.length < self.wolf_vision_range:
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370 vec = -vec
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371 self.set_direction(vec.x, vec.y, 3)
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372 return
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373 self.set_direction(*self.random_move())
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374
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375 @classmethod
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376 def requires(cls):
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377 return [("name", "string"), ("position", "coordinates")]