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source: nagslang/protagonist.py@ 374:150332d6c1fb

Last change on this file since 374:150332d6c1fb was 374:150332d6c1fb, checked in by Stefano Rivera <stefano@…>, 9 years ago
Move the inventory to world, to slightly reduce overall hackyness
File size: 13.2 KB

Rev	Line
[356]	1	import math
	2
[65]	3	import pymunk
	4	import pymunk.pygame_util
	5
[207]	6	from nagslang import render
[281]	7	from nagslang.constants import (
	8	COLLISION_TYPE_PLAYER, ZORDER_MID, WEREWOLF_SOAK_FACTOR,
	9	PROTAGONIST_HEALTH_MIN_LEVEL, PROTAGONIST_HEALTH_MAX_LEVEL,
[361]	10	NON_GAME_OBJECT_COLLIDERS, BULLET_DAMAGE, BULLET_SPEED, CLAW_DAMAGE,
[371]	11	CMD_TOGGLE_FORM, CMD_ACTION)
[313]	12	from nagslang.events import FireEvent, ClawEvent
[215]	13	from nagslang.game_object import GameObject, Physicser, make_body
[76]	14	from nagslang.mutators import FLIP_H
[65]	15	from nagslang.resources import resources
[285]	16	from nagslang.events import ScreenChange
[334]	17	from nagslang.utils import vec_from_angle, vec_with_length
[28]	18
	19
[215]	20	class ProtagonistPhysicser(Physicser):
	21	def __init__(self, space, form_shapes):
	22	self._space = space
	23	self._form_shapes = form_shapes
[367]	24	for shape in form_shapes.values():
	25	shape.physicser = self
[215]	26
	27	def switch_form(self, old_form, new_form):
	28	self._space.remove(self._form_shapes[old_form])
	29	shape = self._form_shapes[new_form]
	30	self._space.add(shape)
	31	for attr, value in shape.protagonist_body_props.iteritems():
	32	setattr(shape.body, attr, value)
	33
	34	def get_shape(self):
	35	return self._form_shapes[self.game_object.form]
	36
	37
[218]	38	class ProtagonistFormSelectionRenderer(render.RendererSelectionRenderer):
	39	def select_renderer(self):
[229]	40	return self.game_object.form
[218]	41
	42
[338]	43	def _make_change_sequence(old, new):
	44	return (
	45	new, new, old, old, old, old,
	46	new, new, old, old, old,
	47	new, new, old, old,
	48	new, new, new, old, old,
	49	new, new, new, new, old, old,
	50	new)
	51
	52
[65]	53	class Protagonist(GameObject):
[28]	54	"""Representation of our fearless protagonist.
	55
	56	TODO: Factor out a bunch of this stuff when we need it for other objects.
	57	"""
	58
	59	HUMAN_FORM = 'human'
	60	WOLF_FORM = 'wolf'
	61
[336]	62	CHANGING_SEQUENCE = {
	63	# The key is the form we're changing from.
[338]	64	HUMAN_FORM: _make_change_sequence(HUMAN_FORM, WOLF_FORM),
	65	WOLF_FORM: _make_change_sequence(WOLF_FORM, HUMAN_FORM),
[336]	66	}
	67
	68	zorder = ZORDER_MID
	69
[277]	70	def __init__(self, space, world, position):
[336]	71	self.form = self.HUMAN_FORM
	72	super(Protagonist, self).__init__(
	73	self._make_physics(space, position), self._make_renderer())
	74	self.world = world
[339]	75	self.health_level = PROTAGONIST_HEALTH_MAX_LEVEL
[336]	76
[218]	77	self.angle = 0
	78	self.is_moving = False
[336]	79	self.changing_sequence = []
[371]	80	self.add_timer('attack_cooldown', 0.2)
	81	self.add_timer('change_delay', 0.1)
[246]	82
[65]	83	self.go_human()
	84
[215]	85	def _make_physics(self, space, position):
	86	body = make_body(10, pymunk.inf, position, 0.8)
	87	body.velocity_limit = 1000
[65]	88
[215]	89	human = pymunk.Poly(body, [(-15, -30), (15, -30), (15, 30), (-15, 30)])
	90	human.elasticity = 1.0
	91	human.collision_type = COLLISION_TYPE_PLAYER
	92	human.protagonist_body_props = {
	93	'mass': 10,
	94	'damping': 0.8,
[93]	95	}
[215]	96
	97	wolf = pymunk.Circle(body, 30)
	98	wolf.elasticity = 1.0
	99	wolf.collision_type = COLLISION_TYPE_PLAYER
	100	wolf.protagonist_body_props = {
	101	'mass': 100,
	102	'damping': 0.9,
	103	}
	104
	105	return ProtagonistPhysicser(space, {
	106	self.HUMAN_FORM: human,
	107	self.WOLF_FORM: wolf,
	108	})
[65]	109
[66]	110	def _get_image(self, name, *transforms):
	111	return resources.get_image('creatures', name, transforms=transforms)
	112
[276]	113	def change_space(self, new_space):
	114	self.physicser.remove_from_space()
	115	self.physicser.set_space(new_space)
	116	self.physicser.add_to_space()
	117
[285]	118	def reset(self):
[339]	119	self.health_level = PROTAGONIST_HEALTH_MAX_LEVEL
[285]	120	self.is_moving = False
	121
	122	self.go_human()
	123
[218]	124	def _make_renderer(self):
	125	return ProtagonistFormSelectionRenderer({
[217]	126	self.HUMAN_FORM: render.FacingSelectionRenderer(
	127	{
[229]	128	'N': render.MovementAnimatedRenderer(
	129	[self._get_image('human_N_1.png'),
	130	self._get_image('human_N_2.png')], 3),
	131	'S': render.MovementAnimatedRenderer(
	132	[self._get_image('human_S_1.png'),
	133	self._get_image('human_S_2.png')], 3),
	134	'W': render.MovementAnimatedRenderer(
	135	[self._get_image('human_W_1.png'),
	136	self._get_image('human_W_2.png')], 3),
	137	'E': render.MovementAnimatedRenderer(
	138	[self._get_image('human_W_1.png', FLIP_H),
	139	self._get_image('human_W_2.png', FLIP_H)], 3),
	140	'NW': render.MovementAnimatedRenderer(
	141	[self._get_image('human_NW_1.png'),
	142	self._get_image('human_NW_2.png')], 3),
	143	'NE': render.MovementAnimatedRenderer(
	144	[self._get_image('human_NW_1.png', FLIP_H),
	145	self._get_image('human_NW_2.png', FLIP_H)], 3),
	146	'SW': render.MovementAnimatedRenderer(
	147	[self._get_image('human_SW_1.png'),
	148	self._get_image('human_SW_2.png')], 3),
	149	'SE': render.MovementAnimatedRenderer(
	150	[self._get_image('human_SW_1.png', FLIP_H),
	151	self._get_image('human_SW_2.png', FLIP_H)], 3),
[217]	152	}),
	153	self.WOLF_FORM: render.FacingSelectionRenderer(
	154	{
[229]	155	'N': render.MovementAnimatedRenderer(
	156	[self._get_image('werewolf_N_1.png'),
	157	self._get_image('werewolf_N_2.png')], 3),
	158	'S': render.MovementAnimatedRenderer(
	159	[self._get_image('werewolf_S_1.png'),
	160	self._get_image('werewolf_S_2.png')], 3),
	161	'W': render.MovementAnimatedRenderer(
	162	[self._get_image('werewolf_W_1.png'),
	163	self._get_image('werewolf_W_2.png')], 3),
	164	'E': render.MovementAnimatedRenderer(
	165	[self._get_image('werewolf_W_1.png', FLIP_H),
	166	self._get_image('werewolf_W_2.png', FLIP_H)], 3),
	167	'NW': render.MovementAnimatedRenderer(
	168	[self._get_image('werewolf_NW_1.png'),
	169	self._get_image('werewolf_NW_2.png')], 3),
	170	'NE': render.MovementAnimatedRenderer(
	171	[self._get_image('werewolf_NW_1.png', FLIP_H),
	172	self._get_image('werewolf_NW_2.png', FLIP_H)], 3),
	173	'SW': render.MovementAnimatedRenderer(
	174	[self._get_image('werewolf_SW_1.png'),
	175	self._get_image('werewolf_SW_2.png')], 3),
	176	'SE': render.MovementAnimatedRenderer(
	177	[self._get_image('werewolf_SW_1.png', FLIP_H),
	178	self._get_image('werewolf_SW_2.png', FLIP_H)], 3),
[217]	179	}),
[218]	180	})
[65]	181
[28]	182	@classmethod
	183	def from_saved_state(cls, saved_state):
	184	"""Create an instance from the provided serialised state.
	185	"""
	186	obj = cls()
	187	# TODO: Update from saved state.
	188	return obj
	189
[371]	190	def handle_attack_key_down(self):
	191	if self.changing_sequence or self.check_timer('attack_cooldown'):
	192	return
	193	self.start_timer('attack_cooldown')
	194	self.world.attacks += 1
	195	self.attack()
	196
[336]	197	def handle_keypress(self, key_command):
	198	if self.changing_sequence:
	199	return
	200	if key_command == CMD_TOGGLE_FORM:
	201	self.world.transformations += 1
	202	self.toggle_form()
	203	if key_command == CMD_ACTION:
	204	self.perform_action()
	205
[93]	206	def get_render_angle(self):
[229]	207	# No image rotation when rendering, please.
	208	return 0
	209
	210	def get_facing_direction(self):
[334]	211	# Our angle is quantised to 45 degree intervals, so possible values for
	212	# x and y in a unit vector are +/-(0, sqrt(2)/2, 1) with some floating
	213	# point imprecision. Rounding will normalise these to (-1.0, 0.0, 1.0)
	214	# which we can safely turn into integers and use as dict keys.
	215	vec = vec_from_angle(self.angle)
[229]	216	x = int(round(vec.x))
	217	y = int(round(vec.y))
	218
	219	return {
	220	(0, 1): 'N',
	221	(0, -1): 'S',
	222	(-1, 0): 'W',
	223	(1, 0): 'E',
	224	(1, 1): 'NE',
	225	(1, -1): 'SE',
	226	(-1, 1): 'NW',
	227	(-1, -1): 'SW',
	228	}[(x, y)]
[93]	229
[65]	230	def go_werewolf(self):
[215]	231	self.physicser.switch_form(self.form, self.WOLF_FORM)
[65]	232	self.form = self.WOLF_FORM
	233	self.impulse_factor = 4000
[215]	234
[65]	235	def go_human(self):
[215]	236	self.physicser.switch_form(self.form, self.HUMAN_FORM)
[65]	237	self.form = self.HUMAN_FORM
	238	self.impulse_factor = 500
[215]	239
[65]	240	def set_direction(self, dx, dy):
[336]	241	if (dx, dy) == (0, 0) or self.changing_sequence:
[218]	242	self.is_moving = False
[65]	243	return
[218]	244	self.is_moving = True
[334]	245	vec = vec_with_length((dx, dy), self.impulse_factor)
	246	self.angle = vec.angle
	247	self.physicser.apply_impulse(vec)
[65]	248
[179]	249	def set_position(self, position):
[215]	250	self.physicser.position = position
[179]	251
	252	def copy_state(self, old_protagonist):
[215]	253	self.physicser.position = old_protagonist.physicser.position
	254	self.physicser.switch_form(self.form, old_protagonist.form)
[217]	255	self.impulse_factor = old_protagonist.impulse_factor
[179]	256	self.form = old_protagonist.form
	257	self.angle = old_protagonist.angle
	258
[65]	259	def toggle_form(self):
[371]	260	if self.check_timer('change_delay'):
[357]	261	return
[338]	262	self.changing_sequence.extend(self.CHANGING_SEQUENCE[self.form])
[336]	263
	264	def _go_to_next_form(self):
	265	if self.changing_sequence.pop(0) == self.WOLF_FORM:
	266	self.go_werewolf()
	267	else:
[65]	268	self.go_human()
	269
[281]	270	def get_current_interactible(self):
	271	for shape in self.get_space().shape_query(self.get_shape()):
	272	if shape.collision_type in NON_GAME_OBJECT_COLLIDERS:
	273	# No game object here.
	274	continue
	275	interactible = shape.physicser.game_object.interactible
	276	if interactible is not None:
	277	return interactible
	278	return None
	279
	280	def perform_action(self):
[28]	281	"""Perform an action on the target.
	282	"""
[281]	283	interactible = self.get_current_interactible()
	284	if interactible is None:
	285	# Nothing to interact with.
	286	return
	287	action = interactible.select_action(self)
	288	if action is None:
	289	# Nothing to do with it.
	290	return
	291	return action.perform(self)
[28]	292
	293	def attack(self):
	294	"""Attempt to hurt something.
	295	"""
[265]	296	if self.in_wolf_form():
[312]	297	self.claw()
[265]	298	else:
[286]	299	self.shoot()
	300
	301	def shoot(self):
	302	if not self.has_item('gun'):
	303	return
[361]	304	vec = vec_from_angle(self.angle, BULLET_SPEED)
[333]	305	FireEvent.post(
[363]	306	self.physicser.position, vec, BULLET_DAMAGE, 'bullet',
	307	COLLISION_TYPE_PLAYER)
[28]	308
[312]	309	def claw(self):
[356]	310	claw_range = (math.sqrt(math.pow(self.physicser.get_velocity()[0], 2) +
	311	math.pow(self.physicser.get_velocity()[1], 2))
	312	/ 20) + 30
	313	vec = vec_from_angle(self.angle, claw_range)
[333]	314	ClawEvent.post(self.physicser.position, vec, CLAW_DAMAGE)
[312]	315
[28]	316	def in_wolf_form(self):
	317	return self.form == self.WOLF_FORM
	318
	319	def in_human_form(self):
	320	return self.form == self.HUMAN_FORM
	321
	322	def has_item(self, item):
[374]	323	return item in self.world.inventory
	324
	325	def add_item(self, item):
	326	self.world.inventory.add(item)
[73]	327
	328	def environmental_movement(self, dx, dy):
	329	if (dx, dy) == (0, 0):
	330	return
[215]	331	self.physicser.apply_impulse((dx, dy))
[246]	332
	333	def get_health_level(self):
[249]	334	"""Return current health level
	335	"""
[246]	336	return self.health_level
	337
[367]	338	def hit(self, weapon):
	339	'''Recieve an attack'''
	340	self.lose_health(weapon.damage)
	341
[285]	342	def die(self):
	343	# Handle player death - may be called due to other reasons
	344	# than zero health
	345	ScreenChange.post('dead')
	346
[246]	347	def lose_health(self, amount):
	348	if self.in_human_form():
	349	self.health_level -= amount
	350	else:
	351	self.health_level -= amount / WEREWOLF_SOAK_FACTOR
[285]	352	if self.health_level <= PROTAGONIST_HEALTH_MIN_LEVEL:
	353	self.die()
[246]	354
	355	def gain_health(self, amount):
	356	self.health_level += amount
	357	if self.health_level > PROTAGONIST_HEALTH_MAX_LEVEL:
[248]	358	self.health_level = PROTAGONIST_HEALTH_MAX_LEVEL
[309]	359
[371]	360	def _decrement_timer(self, timer, dt):
	361	if self._timers[timer] > 0:
	362	self._timers[timer] -= dt
	363	if self._timers[timer] < 0:
	364	self._timers[timer] = 0
	365
[309]	366	def update(self, dt):
[336]	367	if self.changing_sequence:
	368	self._go_to_next_form()
[333]	369	if int(self.lifetime + dt) > int(self.lifetime):
[341]	370	if self.in_wolf_form():
[333]	371	self.gain_health(1)
[309]	372	super(Protagonist, self).update(dt)
[357]	373
	374	def force_wolf_form(self):
	375	if self.in_human_form() and not self.changing_sequence:
	376	self.toggle_form()
[371]	377	self.start_timer('change_delay')

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