def wallBounce(sprite, partner, game, friction=0):
""" Bounce off orthogonally to the wall. """
if not oncePerStep(sprite, game, 'lastbounce'):
return
sprite.speed *= (1. - friction)
stepBack(sprite, partner, game)
if abs(sprite.rect.centerx - partner.rect.centerx) > abs(sprite.rect.centery - partner.rect.centery):
sprite.orientation = (-sprite.orientation[0], sprite.orientation[1])
else:
sprite.orientation = (sprite.orientation[0], -sprite.orientation[1])
def wallBounce(sprite, partner, game, friction=0):
""" Bounce off orthogonally to the wall. """
if not oncePerStep(sprite, game, 'lastbounce'):
return
sprite.speed *= (1. - friction)
stepBack(sprite, partner, game)
if abs(sprite.rect.centerx - partner.rect.centerx) > abs(sprite.rect.centery - partner.rect.centery):
sprite.orientation = (-sprite.orientation[0], sprite.orientation[1])
else:
sprite.orientation = (sprite.orientation[0], -sprite.orientation[1])
def pullWithIt(sprite, partner, game):
""" The partner sprite adds its movement to the sprite's. """
if not oncePerStep(sprite, game, 'lastpull'):
return
tmp = sprite.lastrect
v = unitVector(partner.lastdirection)
sprite._updatePos(v, partner.speed * sprite.physics.gridsize[0])
if isinstance(sprite.physics, ContinuousPhysics):
sprite.speed = partner.speed
sprite.orientation = partner.lastdirection
sprite.lastrect = tmp
def pullWithIt(sprite, partner, game):
""" The partner sprite adds its movement to the sprite's. """
if not oncePerStep(sprite, game, 'lastpull'):
return
tmp = sprite.lastrect
v = unitVector(partner.lastdirection)
sprite._updatePos(v, partner.speed * sprite.physics.gridsize[0])
if isinstance(sprite.physics, ContinuousPhysics):
sprite.speed = partner.speed
sprite.orientation = partner.lastdirection
sprite.lastrect = tmp
def wallStop(sprite, partner, game, friction=0):
""" Stop just in front of the wall, removing that velocity component,
but possibly sliding along it. """
if not oncePerStep(sprite, game, 'laststop'):
return
stepBack(sprite, partner, game)
if abs(sprite.rect.centerx - partner.rect.centerx) > abs(sprite.rect.centery - partner.rect.centery):
sprite.orientation = (0, sprite.orientation[1] * (1. - friction))
else:
sprite.orientation = (sprite.orientation[0] * (1. - friction), 0)
sprite.speed = vectNorm(sprite.orientation) * sprite.speed
sprite.orientation = unitVector(sprite.orientation)
def wallStop(sprite, partner, game, friction=0):
""" Stop just in front of the wall, removing that velocity component,
but possibly sliding along it. """
if not oncePerStep(sprite, game, 'laststop'):
return
stepBack(sprite, partner, game)
if abs(sprite.rect.centerx -
partner.rect.centerx) > abs(sprite.rect.centery -
partner.rect.centery):
sprite.orientation = (0, sprite.orientation[1] * (1. - friction))
else:
sprite.orientation = (sprite.orientation[0] * (1. - friction), 0)
sprite.speed = vectNorm(sprite.orientation) * sprite.speed
sprite.orientation = unitVector(sprite.orientation)
def wallStop(sprite, partner, game, friction=0):
"""
It is important both horizontal and vertical collisions are resolved.
Vertical collisions keep gravity from building up.
"""
# if not oncePerStep(sprite, game, 'laststop'):
# return
# We will revise the velocity used for the last movement
old_delta = Vector2(sprite.rect.topleft) - Vector2(sprite.lastrect.topleft)
collision_vec = Vector2(partner.rect.center) - Vector2(sprite.rect.center)
lastcollision_vec = Vector2(partner.rect.center) - Vector2(sprite.lastrect.center)
# Probably a duplicate, because delta is never 0 with a collision
if old_delta == Vector2(0,0):
return
same_vertical = partner.rect.left < sprite.rect.right < partner.rect.right or \
partner.rect.left < sprite.rect.left < partner.rect.right
# Horizontal collision
# Assume you need horizontal velocity to effect a horizontal collision
if abs(lastcollision_vec.x) > abs(lastcollision_vec.y):
if not oncePerStep(sprite, game, 'last_horizontal_stop'):
return
# velocity = (0, sprite.velocity[1] * (1. - friction))
if sprite.velocity[0] > 0:
x_clip = partner.rect.left - sprite.rect.right
else:
x_clip = partner.rect.right - sprite.rect.left
if old_delta.x == 0:
import ipdb; ipdb.set_trace()
# TODO clean up unused factors
rescale = (old_delta.x + x_clip) / old_delta.x
# new_delta = old_delta * rescale
new_delta = old_delta + (x_clip, 0)
sprite.passive_force = (0, sprite.passive_force[1])
velocity = (0, sprite.velocity[1])
y_clip = None
else:
if not oncePerStep(sprite, game, 'last_vertical_stop'):
return
# Downward motion, so downward collision
if sprite.velocity[1] > 0:
y_clip = partner.rect.top - sprite.rect.bottom
else:
y_clip = partner.rect.bottom - sprite.rect.top
if old_delta.y == 0:
import ipdb; ipdb.set_trace()
rescale = (old_delta.y + y_clip) / old_delta.y
# new_delta = old_delta.elementwise() * (1, rescale)
# new_delta = old_delta * rescale
new_delta = old_delta + (0, y_clip)
# Counter-act passive movement that has been applied earlier
sprite.passive_force = (sprite.passive_force[0], 0)
velocity = (sprite.velocity[0], 0)
# TODO
x_clip = None
sprite.rect = sprite.lastrect.move(new_delta)
sprite.update_velocity(velocity)
