items.py

from globals import *

import graphics as gfx

import scripting
import maputils
import drawing
import bad_numbers
import effects
import timers
import alife
import logic
import zones
import cache
import maps
import life

import logging
import random

try:
	import ujson as json
except:
	import json


def load_item(item):
	with open(os.path.join(ITEM_DIR, item),'r') as e:
		try:
			logging.debug('Caching item: %s' % item)
			return json.loads(''.join(e.readlines()))
		except ValueError,e:
			raise Exception('Failed to load item: %s' % e)

def initiate_all_items():
	logging.debug('Loading all items...')
	for (dirpath, dirname, filenames) in os.walk(ITEM_DIR):
		for f in [f for f in filenames if f.count('.json')]:
			initiate_item(f)

def initiate_item(name):
	"""Loads (and returns) new item type into memory."""
	if name in ITEM_TYPES:
		logging.warning('Item type \'%s\' is already loaded. Reloading...' % name)
	
	item = load_item(name)
	_marked_for_reint = {}
	
	if not 'prefix' in item:
		logging.warning('No prefix set for item type \'%s\'. Using default (%s).' % (name, DEFAULT_ITEM_PREFIX))
		item['prefix'] = DEFAULT_ITEM_PREFIX
	
	if not 'icon' in item:
		logging.warning('No icon set for item type \'%s\'. Using default (%s).' % (name, DEFAULT_ITEM_ICON))
		item['icon'] = DEFAULT_ITEM_ICON
	elif isinstance(item['icon'], int):
		item['icon'] = chr(item['icon'])
	
	if not 'color' in item:
		item['color'] = (tcod.white, None)
	else:
		_fore = None
		_back = None
		
		if item['color'][0]:
			_fore = tcod.Color(item['color'][0][0], item['color'][0][1], item['color'][0][2])
		
		if item['color'][1]:
			_back = tcod.Color(item['color'][1][0], item['color'][1][1], item['color'][1][2])
		
		item['color'] = (_fore, _back)
	
	if not 'flags' in item:
		logging.error('No flags set for item type \'%s\'. Errors may occur.' % name)
		item['flags'] = ''
	
	if 'attaches_to' in item:
		item['attaches_to'] = item['attaches_to'].split('|')
	
	if 'capacity' in item:
		item['max_capacity'] = [int(c) for c in item['capacity'].split('x')]
		item['max_capacity'] = item['max_capacity'][0]*item['max_capacity'][1]
		item['capacity'] = 0
		item['storing'] = []
	
	if 'speed' in item:
		item['max_speed'] = item['speed']
	else:
		item['max_speed'] = 2
	
	if 'thickness' in item:
		item['max_thickness'] = item['thickness']
	else:
		item['max_thickness'] = 1
		item['thickness'] = 1
		logging.warning('No thickness defined for item %s.' % item['name'])
	
	if not 'size' in item:
		logging.warning('No size set for item type \'%s\'. Using default (%s).' % (name, DEFAULT_ITEM_SIZE))
		item['size'] = DEFAULT_ITEM_SIZE
	
	if item['type'] == 'gun':
		item[item['feed']] = None
	
	#item['flags'] = []
	_flags = {}
	for flag in item['flags'].split('|'):
		if '=' in flag:
			_flag_split = flag.split('=')
			_flags[_flag_split[0]] = None
			
			if len(_flag_split)==2:
				_flags[_flag_split[0]] = _flag_split[1]
		elif '[' in flag:
			_ocount = flag.count('[')
			_ccount = flag.count(']')
			
			if _ocount > _ccount:
				logging.error('Brace mismatch in item \'%s\': Expected \']\'' % name)
				continue
			elif _ocount < _ccount:
				logging.error('Brace mismatch in item \'%s\': Expected \'[\'' % name)
				continue
			
			_flags[flag.split('[')[0]] = scripting.initiate(item, flag)
		else:
			_flags[flag] = None
	
	item['blocking'] = False
	
	if 'CAN_BURN' in _flags:
		item['burning'] = 0
		item['burnt'] = False
	
	if 'CAN_BLOCK' in _flags:
		item['blocking'] = True
		item['on'] = True
	
	item['flags'] = _flags
	item['size'] = [int(c) for c in item['size'].split('x')]
	item['size'] = item['size'][0]*item['size'][1]
	
	for key in item:
		if isinstance(item[key],list):
			_marked_for_reint[key] = item[key][:]
	
	item['marked_for_reint'] = _marked_for_reint.copy()
	
	#Unicode isn't handled all that well on Windows for some reason...
	for key in item:
		_value = item[key]
		del item[key]
		item[str(key)] = _value
		
		if isinstance(item[key],unicode):
			item[key] = str(item[key])
	
	ITEM_TYPES[item['name']] = item
	
	return item

def create_item(name, position=[0,0,2], item=None):
	"""Initiates and returns a copy of an item type."""
	if not item:
		item = ITEM_TYPES[name].copy()
	
	if 'marked_for_reint' in item:
		for key in item['marked_for_reint']:
			item[key] = item['marked_for_reint'][key][:]
		
		del item['marked_for_reint']

	item['uid'] = str(WORLD_INFO['itemid'])
	item['pos'] = list(position)
	item['realpos'] = list(position)
	item['velocity'] = [0.0, 0.0, 0.0]
	item['friction'] = 0
	item['gravity'] = WORLD_INFO['world_gravity']
	item['lock'] = None
	item['owner'] = None
	item['aim_at_limb'] = None
	
	if not 'blocking' in item:
		item['blocking'] = False
	
	if not 'examine_keys' in item:
		item['examine_keys'] = ['description']
	
	item['speed'] = 0
	
	add_to_chunk(item)
	maps.load_cluster_at_position_if_needed(position)
	ITEMS[item['uid']] = item
	ACTIVE_ITEMS.add(item['uid'])
	
	WORLD_INFO['itemid'] += 1
	return item['uid']

def delete_item(item):
	if item['uid'] in ITEMS and item['owner'] and item['uid'] in LIFE[item['owner']]['inventory']:
		life.remove_item_from_inventory(LIFE[item['owner']], item['uid'])
	
	logging.debug('Deleting references to item %s' % item['uid'])
	
	for _life in [LIFE[i] for i in LIFE]:
		if item['uid'] in _life['know_items']:
			alife.brain.offload_remembered_item(_life, item['uid'])
			alife.survival.remove_item_from_needs(_life, item['uid'])
			del _life['know_items'][item['uid']]
			_life['known_items_type_cache'][item['type']].remove(item['uid'])
			
			logging.debug('\tDeleted reference in life #%s' % _life['id'])
	
	timers.remove_by_owner(item)
	remove_from_chunk(item)
	
	if gfx.position_is_in_frame(item['pos']):
		gfx.refresh_view_position(item['pos'][0]-CAMERA_POS[0],
		                          item['pos'][1]-CAMERA_POS[1],
		                          'map')
	
	cache.offload_item(item)
	
	if item['uid'] in ACTIVE_ITEMS:
		ACTIVE_ITEMS.remove(item['uid'])
	
	del ITEMS[item['uid']]

def add_to_chunk(item):
	_chunk = alife.chunks.get_chunk(alife.chunks.get_chunk_key_at(item['pos']))
	
	if not item['uid'] in _chunk['items']:
		_chunk['items'].append(item['uid'])
		
		return True
	
	return False

def remove_from_chunk(item):
	_chunk = alife.chunks.get_chunk(alife.chunks.get_chunk_key_at(item['pos']))
	
	if item['uid'] in _chunk['items']:
		_chunk['items'].remove(item['uid'])
		
		return True
	
	return False

def clean_item_for_save(item):
	if isinstance(item['icon'], unicode) or isinstance(item['icon'], str):
			item['icon'] = ord(item['icon'][0])
		
	_fore = None
	_back = None
	
	if item['color'][0]:
		_fore = (item['color'][0][0], item['color'][0][1], item['color'][0][2])
	
	if item['color'][1]:
		_back = (item['color'][1][0], item['color'][1][1], item['color'][1][2])
	
	item['color'] = (_fore, _back)

def save_all_items():
	for item in ITEMS.values():
		clean_item_for_save(item)

def reload_all_items():
	for item in ITEMS.values():
		if isinstance(item['icon'], int):
			item['icon'] = chr(item['icon'])
		
		if item['color'][0]:
			_fore = tcod.Color(item['color'][0][0], item['color'][0][1], item['color'][0][2])
		else:
			_fore = tcod.white
		
		if item['color'][1]:
			_back = tcod.Color(item['color'][1][0], item['color'][1][1], item['color'][1][2])
		else:
			_back = None
		
		add_to_chunk(item)
		
		item['color'] = (_fore, _back)

def get_item_from_uid(uid):
	"""Helper function. Returns item of `uid`."""
	return ITEMS[uid]

def fetch_item(item_uid):
	if item_uid in ITEMS:
		return ITEMS[item_uid]
	
	#Fetch from history now (sometimes offloaded)
	return cache.retrieve_item(item_uid)

def get_pos(item_uid):
	item = ITEMS[item_uid]
	
	if 'parent_id' in item:
		return LIFE[item['parent_id']]['pos']
	
	return item['pos']

def get_items_at(position, check_bodies=False):
	"""Returns list of all items at a given position."""
	_items = []
	_chunk = alife.chunks.get_chunk(alife.chunks.get_chunk_key_at(position))
	
	for _item in _chunk['items']:
		if not _item in ITEMS:
			continue		
		
		item = ITEMS[_item]
		
		if item['name'] == 'gib':
			continue
		
		if is_item_owned(_item):
			continue
		
		if tuple(item['pos']) == tuple(position):
			_items.append(item)
	
	#TODO: This is awful
	if check_bodies:
		#for pos in [(-1, 0), (1, 0), (0, -1), (0, 1), (-1, -1), (1, -1), (-1, 1), (1, 1), (0, 0)]:
		#	__pos = (_pos[0]+pos[0], _pos[1]+pos[1], _pos[2])
		#	_items.extend(items.get_items_at(__pos))
			
		#Sue me again.
		for life_id in LIFE[SETTINGS['controlling']]['seen']:
			if bad_numbers.distance(LIFE[SETTINGS['controlling']]['pos'], LIFE[life_id]['pos'])>1:
				continue
			
			for item_uid in life.get_all_equipped_items(LIFE[life_id]):
				_items.append(ITEMS[item_uid])
	
	return _items

def get_name(item):
	"""Returns the full name of an item."""
	_prefixes = [item['prefix']]
	
	if 'burning' in item:
		if item['burning']:
			_prefixes.append('burning')
		elif item['burnt']:
			_prefixes.append('burnt')
	
	if 'capacity' in item:
		_score = item['capacity']/float(item['max_capacity'])
		
		if _score >= .75:
			_prefixes.append('nearly full')
		elif _score == 0:
			_prefixes.append('empty')
	
	if len(_prefixes)>=2:
		if _prefixes[0] == 'a' and _prefixes[1] in ['empty']:
			_prefixes[0] = 'an'
	
	return '%s %s' % (' '.join(_prefixes), item['name'])		

def move(item, direction, speed, friction=0.05, _velocity=0):
	"""Sets new velocity for an item. Returns nothing."""
	velocity = bad_numbers.velocity(direction, speed)
	velocity[2] = _velocity
	
	item['speed'] = speed
	item['friction'] = friction
	item['velocity'] = velocity
	item['realpos'] = item['pos'][:]
	
	logging.debug('%s flies off in an arc! (%s)' % (get_name(item), item['velocity']))

def is_item_owned(item_uid):
	_item = get_item_from_uid(item_uid)
	
	if _item.has_key('parent_id'):
		return True
	
	if _item.has_key('parent'):
		return True
	
	if _item.has_key('stored_in'):
		return True
	
	return False

def is_blocking(item_uid):
	return ITEMS[item_uid]['blocking']

def draw_items(view_size=MAP_WINDOW_SIZE):
	_view = gfx.get_view_by_name('map')
	
	for item_uid in LIFE[SETTINGS['following']]['seen_items']:
		if not item_uid in ITEMS:
			continue
		
		_item = ITEMS[item_uid]
	
		_d_x = _item['pos'][0]-CAMERA_POS[0]
		_d_y = _item['pos'][1]-CAMERA_POS[1]
	
		if _d_x < 0 or _d_x >= MAP_WINDOW_SIZE[0] or _d_y < 0 or _d_y >= MAP_WINDOW_SIZE[1]:
			continue
	
		if not alife.sight.is_in_fov(LIFE[SETTINGS['following']], _item['pos']):
			continue
		
		gfx.blit_char_to_view(_d_x,
	        _d_y,
	        _item['icon'],
	        (_item['color'][0],
	         _item['color'][1]),
	        'map')

def draw_all_items():
	_view = gfx.get_view_by_name('map')
	
	for _item in ITEMS:
		item = ITEMS[_item]
		
		if is_item_owned(item['uid']):
			continue
		
		if item['pos'][0] >= CAMERA_POS[0] and item['pos'][0] < CAMERA_POS[0]+_view['draw_size'][0] and\
			        item['pos'][1] >= CAMERA_POS[1] and item['pos'][1] < CAMERA_POS[1]+_view['draw_size'][1]:
			
			_x = item['pos'][0]-CAMERA_POS[0]
			_y = item['pos'][1]-CAMERA_POS[1]
			
			gfx.blit_char_to_view(_x,
				        _y,
				        item['icon'],
				        (item['color'][0],
			              item['color'][1]),
				        'map')

def update_container_capacity(container_uid):
	"""Updates the current capacity of container. Returns nothing."""
	_container = get_item_from_uid(container_uid)
	_capacity = 0
	
	for item in _container['storing']:
		_capacity += get_item_from_uid(item)['size']
	
	_container['capacity'] = _capacity

def can_store_item_in(item_uid, container_uid):
	_item = get_item_from_uid(item_uid)
	_container = get_item_from_uid(container_uid)
	
	if 'max_capacity' in _container and _container['capacity']+_item['size'] <= _container['max_capacity']:
		return container_uid
		
	return False

def store_item_in(item_uid, container_uid):
	if not can_store_item_in(item_uid, container_uid):
		print 'cannot store in'
		raise Exception('Cant store item %s in container %s: %s is full.' % (item_uid, container_uid, ITEMS[container_uid]['name']))
	
	_item = get_item_from_uid(item_uid)
	
	_container = get_item_from_uid(container_uid)
	_container['storing'].append(item_uid)
	_container['capacity'] += _item['size']
	_item['stored_in'] = container_uid
	
	update_container_capacity(container_uid)
	add_to_chunk(_item)
	return True

def remove_item_from_any_storage(item_uid):
	_item = get_item_from_uid(item_uid)
	
	_container = get_item_from_uid(_item['stored_in'])
	_container['storing'].remove(item_uid)
	update_container_capacity(_item['stored_in'])
	
	del _item['stored_in']

def process_event(item, event):
	if event == 'equip' and 'ON_EQUIP' in item['flags']:
		scripting.execute(item['flags']['ON_EQUIP'], item_uid=item['uid'])
	
	elif event == 'activate' and 'ON_ACTIVATE' in item['flags']:
		scripting.execute(item['flags']['ON_ACTIVATE'], item_uid=item['uid'])
	
	elif event == 'deactivate' and 'ON_DEACTIVATE' in item['flags']:
		scripting.execute(item['flags']['ON_DEACTIVATE'], item_uid=item['uid'])
	
	elif event == 'stop' and 'ON_STOP' in item['flags']:
		scripting.execute(item['flags']['ON_STOP'], item_uid=item['uid'])
	
	elif event == 'collide' and 'ON_COLLIDE_WITH' in item['flags']:
		scripting.execute(item['flags']['ON_COLLIDE_WITH'], item_uid=item['uid'])

def activate(item):
	if item['on']:
		process_event(item, 'deactivate')
		item['on'] = False
	else:
		process_event(item, 'activate')
		item['on'] = True

def burn(item, amount):
	if not 'CAN_BURN' in item['flags']:
		return False
	
	item['burning'] += amount*.1

	if item['owner']:
		logging.debug('%s\'s %s catches fire!' % (' '.join(LIFE[item['owner']]['name']), item['name']))
		
		if 'player' in LIFE[item['owner']]:
			gfx.message('Your %s catches fire!' % item['name'])

def explode(item):
	if not item['type'] == 'explosive':
		return False
	
	logging.debug('The %s (item %s) explodes!' % (item['name'], item['uid']))
	
	#TODO: Don't breathe this!
	item['pos'] = get_pos(item['uid'])
	
	if item['damage']['force']:
		effects.create_explosion(item['pos'], item['damage']['force'])
	
	if SETTINGS['controlling'] and alife.sight.can_see_position(LIFE[SETTINGS['controlling']], item['pos']):
		gfx.message('%s explodes!' % get_name(item))
		logic.show_event('%s explodes!' % get_name(item), item=item, delay=0)
		
	#elif bad_numbers.distance(
	
	#TODO: Dirty hack
	for life_id in LIFE:
		_limbs = LIFE[life_id]['body'].keys()
		
		if not _limbs:
			continue
		
		_force = bad_numbers.clip((item['damage']['force']*2)-bad_numbers.distance(LIFE[life_id]['pos'], item['pos']), 0, 100)
		
		if not _force:
			continue
		
		_known_item = alife.brain.remembers_item(LIFE[life_id], item)
		_direction = bad_numbers.direction_to(item['pos'], LIFE[life_id]['pos'])
		
		#TODO: Intelligent(?) limb groups?
		_distance = bad_numbers.distance(LIFE[life_id]['pos'], item['pos'])/2
		
		for i in range(_force-_distance):
			_limb = random.choice(_limbs)
			
			for _attached_limb in life.get_all_attached_limbs(LIFE[life_id], _limb):
				if _attached_limb in _limbs:
					_limbs.remove(_attached_limb)
			
			#_limb = random.choice(LIFE[life_id]['body'].keys())
			
			if _known_item and _known_item['last_seen_time'] < 100 and _known_item['last_owned_by']:
				life.memory(LIFE[life_id], 'blown_up_by', target=_known_item['last_owned_by'])
			
			#for _limb in _limbs:
			life.add_wound(LIFE[life_id], _limb, force_velocity=bad_numbers.velocity(_direction, _force*2))
			
			if not _limbs:
				break
		
		life.push(LIFE[life_id], _direction, _force)
		
		if 'player' in LIFE[life_id]:
			life.say(LIFE[life_id], '@n are thrown by the explosion!', action=True)
		else:
			life.say(LIFE[life_id], '@n is thrown by the explosion!', action=True)
	
	if 'fire' in item['damage']:
		_circle = drawing.draw_circle(item['pos'], item['radius'])
		_zone = zones.get_zone_at_coords(item['pos'])
		
		if _zone:	
			for pos in zones.dijkstra_map(item['pos'], [item['pos']], [_zone], return_score_in_range=[0, item['damage']['fire']]):
				if not pos in _circle:
					continue
				
				if not maps.position_is_in_map(pos):
					continue
				
				for life_id in LIFE_MAP[pos[0]][pos[1]]:
					for _visible_item in [get_item_from_uid(i) for i in life.get_all_visible_items(LIFE[life_id])]:
						if not 'CAN_BURN' in _visible_item['flags']:
							continue
						
						burn(_visible_item, item['damage']['fire'])
				
				if not random.randint(0, 4):
					effects.create_fire((pos[0], pos[1], item['pos'][2]),
					                    intensity=item['damage']['fire']/2)
			
				_dist = bad_numbers.distance(item['pos'], pos)/2
				if not random.randint(0, _dist) or not _dist:
					effects.create_ash(pos)
		
				if gfx.position_is_in_frame(pos):
					_render_pos = gfx.get_render_position(pos)
					gfx.refresh_view_position(_render_pos[0], _render_pos[1], 'map')
	
	#if item['uid'] in ITEMS and ITEMS[item['uid']]['owner'] and item['uid'] in LIFE[ITEMS[item['uid']]['owner']]['inventory']:
	delete_item(item)

def collision_with_solid(item, pos):
	_x_diff = bad_numbers.clip(item['pos'][0]-pos[0], -1, 1)
	_y_diff = bad_numbers.clip(item['pos'][1]-pos[1], -1, 1)
	
	if maps.is_solid(pos) and item['velocity'][2]<0:
		#TODO: Bounce
		item['velocity'] = [0, 0, 0]
		#item['pos'] = pos
		
		item['pos'][0] = pos[0]+_x_diff
		item['pos'][1] = pos[1]+_y_diff
		item['realpos'][0] = float(pos[0])+_x_diff
		item['realpos'][1] = float(pos[1])+_y_diff
		
		print '*** STOP ***'
		
		process_event(item, 'stop')
			
		return True
	
	if item['velocity'][2]>=0:
		_z = 1
	else:
		_z = -1
	
	_is_solid = (pos[0], pos[1], pos[2]+_z)
	
	#if not pos[0]-1 < 0 and item['velocity'][0]<0 and WORLD_INFO['map'][pos[0]-1][pos[1]][pos[2]+_z]:
	#	item['velocity'][0] = -item['velocity'][0]*.8
	#
	if _x_diff<0 and _is_solid:
		item['pos'][0] = pos[0]+_x_diff
		item['realpos'][0] = float(pos[0])+_x_diff
		
		if not item['velocity'][0]<0:
			item['velocity'][0] = -item['velocity'][0]*.8
		
		#print '*** bounce ***', _x_diff, item['pos'], pos
		
		#if 'max_speed' in item:
		#	effects.create_smoke_cloud(pos, 4)
	elif _x_diff>0 and _is_solid:
		item['pos'][0] = pos[0]+_x_diff
		item['realpos'][0] = float(pos[0])+_x_diff
		
		if not item['velocity'][0]>0:
			item['velocity'][0] = -item['velocity'][0]*.8
		
		#print '*** bounce ***', _x_diff, item['pos'], pos
		
		#if 'max_speed' in item:
		#	effects.create_smoke_cloud(pos, 4)
	
	if _y_diff<0 and _is_solid:
		item['pos'][1] = pos[1]+_y_diff
		item['realpos'][1] = float(pos[1])+_y_diff
		
		if not item['velocity'][1]<0:
			item['velocity'][1] = -item['velocity'][1]*.8
		
		#print '*** bounce ***', _x_diff, item['pos'], pos
		
		#if 'max_speed' in item:
		#	effects.create_smoke_cloud(pos, 4)
	elif _y_diff>0 and _is_solid:
		item['pos'][1] = pos[1]+_x_diff
		item['realpos'][1] = float(pos[1])+_x_diff
		
		if not item['velocity'][1]>0:
			item['velocity'][1] = -item['velocity'][1]*.8
		
		#print '*** bounce ***', _x_diff, item['pos'], pos
		
		#if 'max_speed' in item:
		#	effects.create_smoke_cloud(pos, 4)
	
	return maps.is_solid(pos)

def create_effects(item, pos, real_z_pos, z_min):
	for _z in range(0, 2):
		_z_level = bad_numbers.clip(z_min-_z, 0, maputils.get_map_size(WORLD_INFO['map'])[2]-1)
		
		if WORLD_INFO['map'][pos[0]][pos[1]][_z_level]:
			if int(round(real_z_pos))-_z_level<=2:
				if 'BLOODY' in item['flags']:
					if random.randint(0,50)<=35:
						effects.create_splatter('blood', [pos[0]+random.randint(-2, 2), pos[1]+random.randint(-2, 2), _z_level])
				
				if 'SMOKING' in item['flags']:
					if random.randint(0, 50)<=25:
						effects.create_smoke_streamer([pos[0]+random.randint(-item['size'], item['size']), pos[1]+random.randint(-item['size'], item['size']), _z_level],
						                              item['size']/2,
						                              random.randint(item['size']*2, (item['size']*2)+5))
				if 'BURNING' in item['flags']:
					if random.randint(0, 50)<=25:
						effects.create_smoke_cloud([pos[0]+random.randint(-item['size'], item['size']), pos[1]+random.randint(-item['size'], item['size']), _z_level],
						                              random.randint(item['size'], (item['size'])+3),
						                              color=tcod.light_crimson)
				if 'max_speed' in item and is_moving(item):
					effects.create_vapor(item['pos'], 5, bad_numbers.clip(item['speed']/20, 0, 1))

def get_min_max_velocity(item):
	if item['velocity'][0]>0:
		_min_x_vel = 0
		_max_x_vel = 255
	else:
		_min_x_vel = -255
		_max_x_vel = 0
	
	if item['velocity'][1]>0:
		_min_y_vel = 0
		_max_y_vel = 255
	else:
		_min_y_vel = -255
		_max_y_vel = 0
	
	return _min_x_vel, _min_y_vel, _max_x_vel, _max_y_vel

#TODO: Move this
def is_moving(item):
	return sum([abs(v) for v in item['velocity']])>0

def tick_effects(item):
	if 'CAN_BURN' in item['flags'] and item['burning'] and item['owner']:
		life.burn(LIFE[item['owner']], item['burning'])
	
	if 'stored_in' in item or is_item_owned(item['uid']):
		return False
	
	create_effects(item, item['pos'], item['pos'][2], 2)

def tick_item(item):
	_z_max = bad_numbers.clip(item['pos'][2], 0, MAP_SIZE[2]-1)
	
	if item['type'] == 'bullet':
		_gravity = 0
	else:
		_gravity = item['gravity']
	
	if not is_moving(item):
		return False
	
	_x = item['pos'][0]
	_y = item['pos'][1]
	_break = False
	
	item['realpos'][0] += item['velocity'][0]
	item['realpos'][1] += item['velocity'][1]	
	
	_line = drawing.diag_line(item['pos'], (int(round(item['realpos'][0])),int(round(item['realpos'][1]))))

	#Refresh even if we're not moving far enough to switch tiles
	if gfx.position_is_in_frame((_x, _y)):
		gfx.refresh_view_position(_x-CAMERA_POS[0], _y-CAMERA_POS[1], 'map')
	
	if not _line:
		item['velocity'][2] -= _gravity
		item['realpos'][2] = item['realpos'][2]+item['velocity'][2]
		item['pos'][2] = int(round(item['realpos'][2]))
		
		if maps.is_oob(item['pos']):
			delete_item(item)
			
			return False
		
		_z_min = bad_numbers.clip(int(round(item['realpos'][2])), 0, MAP_SIZE[2]-1)
		
		collision_with_solid(item, [int(round(item['realpos'][0])), int(round(item['realpos'][1])), _z_min])
	
	for pos in _line:
		item['realpos'][2] += item['velocity'][2]
		
		if _gravity:
			item['velocity'][2] -= item['velocity'][2]*_gravity
		
		if 'drag' in item:
			_drag = item['drag']
		else:
			_drag = item['gravity']
			logging.warning('Improper use of gravity.')
			
		_min_x_vel, _min_y_vel, _max_x_vel, _max_y_vel = get_min_max_velocity(item)
		
		if abs(item['velocity'][0])<=1:
			item['velocity'][0] = 0.0
			
		if abs(item['velocity'][1])<=1:
			item['velocity'][1] = 0.0
		
		if not is_moving(item):
			if item['type'] == 'bullet':
				delete_item(item)
				return False
		
		item['velocity'][0] -= bad_numbers.clip(item['velocity'][0]*_drag, _min_x_vel, _max_x_vel)
		item['velocity'][1] -= bad_numbers.clip(item['velocity'][1]*_drag, _min_y_vel, _max_y_vel)
		item['speed'] -= bad_numbers.clip(item['speed']*_drag, 0, 100)
		
		if maps.is_oob((pos[0], pos[1], int(round(item['realpos'][2])))) or maps.is_oob(item['realpos']):
			delete_item(item)
			
			return False
		
		#TODO: Don't just stop the object
		collision_with_solid(item, (pos[0], pos[1], int(round(item['realpos'][2]))))
		
		tick_effects(item)
				
		#TODO: Don't do this here... maybe a callback or something
		if item['type'] == 'bullet':
			for _life in [LIFE[i] for i in LIFE]:
				if not _life['online']:
					continue
				
				if _life['id'] == item['shot_by'] or _life['dead']:
					continue					
				
				if _life['pos'][0] == pos[0] and _life['pos'][1] == pos[1] and _life['pos'][2] == int(round(item['realpos'][2])):
					remove_from_chunk(item)
					item['pos'] = [pos[0],pos[1],_life['pos'][2]]
					add_to_chunk(item)
					life.damage_from_item(_life, item)
					
					if item['uid'] in ITEMS:
						delete_item(item)
					
					return False
		#if _break:
		#	break
	
		#_z_min = bad_numbers.clip(int(round(item['realpos'][2])), 0, MAP_SIZE[2]-1)
		#if collision_with_solid(item, [pos[0], pos[1], _z_min]):
		#	#_break = True
		#	break
		
		#create_effects(item, pos, item['realpos'][2], _z_min)
	
	remove_from_chunk(item)
	
	if _break:
		item['pos'][0] = int(pos[0])
		item['pos'][1] = int(pos[1])
		item['pos'][2] = int(round(item['realpos'][2]))
	else:
		item['pos'][0] = int(round(item['realpos'][0]))
		item['pos'][1] = int(round(item['realpos'][1]))
		item['pos'][2] = int(round(item['realpos'][2]))
	
	add_to_chunk(item)
	
	_x = item['pos'][0]
	_y = item['pos'][1]
	
	if gfx.position_is_in_frame((_x, _y)):
		gfx.refresh_view_position(_x-CAMERA_POS[0], _y-CAMERA_POS[1], 'map')

	if maps.is_oob(item['pos']):
		delete_item(item)
		
		return False

	_min_x_vel, _min_y_vel, _max_x_vel, _max_y_vel = get_min_max_velocity(item)
	
	if abs(item['velocity'][0])<.35:
		item['velocity'][0] = 0.0
			
	if abs(item['velocity'][1])<.35:
		item['velocity'][1] = 0.0
	
	#TODO: This isn't gravity...
	if 'drag' in item:
		_drag = item['drag']
	else:
		_drag = item['gravity']
		logging.warning('Improper use of gravity.')
	
	item['velocity'][0] -= bad_numbers.clip(item['velocity'][0]*_drag, _min_x_vel, _max_x_vel)
	item['velocity'][1] -= bad_numbers.clip(item['velocity'][1]*_drag, _min_y_vel, _max_y_vel)
	item['speed'] -= bad_numbers.clip(item['speed']*_drag, 0, 100)

def tick_all_items():
	if not WORLD_INFO['ticks'] % 16 or not ACTIVE_ITEMS:
		if SETTINGS['controlling']:
			for item in ITEMS.values():
				if bad_numbers.distance(item['pos'], LIFE[SETTINGS['controlling']]['pos'])>=OFFLINE_ALIFE_DISTANCE:
					if item['uid'] in ACTIVE_ITEMS:
						ACTIVE_ITEMS.remove(item['uid'])
				elif not item['uid'] in ACTIVE_ITEMS:
					ACTIVE_ITEMS.add(item['uid'])
		elif not ACTIVE_ITEMS:
			ACTIVE_ITEMS.update(ITEMS.keys())
		
	for item in ACTIVE_ITEMS.copy():
		if is_moving(ITEMS[item]):
			tick_effects(ITEMS[item])
		
		tick_item(ITEMS[item])