215 lines
8.0 KiB
Python
215 lines
8.0 KiB
Python
# ----------------------------------------------------------------------------
|
|
# pyglet
|
|
# Copyright (c) 2006-2008 Alex Holkner
|
|
# Copyright (c) 2008-2020 pyglet contributors
|
|
# All rights reserved.
|
|
#
|
|
# Redistribution and use in source and binary forms, with or without
|
|
# modification, are permitted provided that the following conditions
|
|
# are met:
|
|
#
|
|
# * Redistributions of source code must retain the above copyright
|
|
# notice, this list of conditions and the following disclaimer.
|
|
# * Redistributions in binary form must reproduce the above copyright
|
|
# notice, this list of conditions and the following disclaimer in
|
|
# the documentation and/or other materials provided with the
|
|
# distribution.
|
|
# * Neither the name of pyglet nor the names of its
|
|
# contributors may be used to endorse or promote products
|
|
# derived from this software without specific prior written
|
|
# permission.
|
|
#
|
|
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
|
|
# FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
|
|
# COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
# INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
|
|
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
|
|
# LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
|
|
# CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
|
|
# ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
# POSSIBILITY OF SUCH DAMAGE.
|
|
# ----------------------------------------------------------------------------
|
|
|
|
"""2D Animations
|
|
|
|
Animations can be used by the :py:class:`~pyglet.sprite.Sprite` class in place
|
|
of static images. They are essentially containers for individual image frames,
|
|
with a duration per frame. They can be infinitely looping, or stop at the last
|
|
frame. You can load Animations from disk, such as from GIF files::
|
|
|
|
ani = pyglet.resource.animation('walking.gif')
|
|
sprite = pyglet.sprite.Sprite(img=ani)
|
|
|
|
Alternatively, you can create your own Animations from a sequence of images
|
|
by using the :py:meth:`~Animation.from_image_sequence` method::
|
|
|
|
images = [pyglet.resource.image('walk_a.png')
|
|
pyglet.resource.image('walk_b.png')
|
|
pyglet.resource.image('walk_c.png')]
|
|
|
|
ani = pyglet.image.Animation.from_image_sequence(images, duration=0.1, loop=True)
|
|
|
|
You can also use an :py:class:`pyglet.image.ImageGrid`, which is iterable::
|
|
|
|
sprite_sheet = pyglet.resource.image('my_sprite_sheet.png')
|
|
image_grid = pyglet.image.ImageGrid(sprite_sheet, rows=1, columns=5)
|
|
|
|
ani = pyglet.image.Animation.from_image_sequence(image_grid, duration=0.1)
|
|
|
|
In the above examples, all of the Animation Frames have the same duration.
|
|
If you wish to adjust this, you can manually create the Animation from a list of
|
|
:py:class:`~AnimationFrame`::
|
|
|
|
image_a = pyglet.resource.image('walk_a.png')
|
|
image_b = pyglet.resource.image('walk_b.png')
|
|
image_c = pyglet.resource.image('walk_c.png')
|
|
|
|
frame_a = pyglet.image.AnimationFrame(image_a, duration=0.1)
|
|
frame_b = pyglet.image.AnimationFrame(image_b, duration=0.2)
|
|
frame_c = pyglet.image.AnimationFrame(image_c, duration=0.1)
|
|
|
|
ani = pyglet.image.Animation(frames=[frame_a, frame_b, frame_c])
|
|
|
|
"""
|
|
|
|
|
|
class Animation:
|
|
"""Sequence of images with timing information.
|
|
|
|
If no frames of the animation have a duration of ``None``, the animation
|
|
loops continuously; otherwise the animation stops at the first frame with
|
|
duration of ``None``.
|
|
|
|
:Ivariables:
|
|
`frames` : list of `~pyglet.image.AnimationFrame`
|
|
The frames that make up the animation.
|
|
|
|
"""
|
|
|
|
def __init__(self, frames):
|
|
"""Create an animation directly from a list of frames.
|
|
|
|
:Parameters:
|
|
`frames` : list of `~pyglet.image.AnimationFrame`
|
|
The frames that make up the animation.
|
|
|
|
"""
|
|
assert len(frames)
|
|
self.frames = frames
|
|
|
|
def add_to_texture_bin(self, texture_bin, border=0):
|
|
"""Add the images of the animation to a :py:class:`~pyglet.image.atlas.TextureBin`.
|
|
|
|
The animation frames are modified in-place to refer to the texture bin
|
|
regions.
|
|
|
|
:Parameters:
|
|
`texture_bin` : `~pyglet.image.atlas.TextureBin`
|
|
Texture bin to upload animation frames into.
|
|
`border` : int
|
|
Leaves specified pixels of blank space around
|
|
each image frame when adding to the TextureBin.
|
|
|
|
"""
|
|
for frame in self.frames:
|
|
frame.image = texture_bin.add(frame.image, border)
|
|
|
|
def get_transform(self, flip_x=False, flip_y=False, rotate=0):
|
|
"""Create a copy of this animation applying a simple transformation.
|
|
|
|
The transformation is applied around the image's anchor point of
|
|
each frame. The texture data is shared between the original animation
|
|
and the transformed animation.
|
|
|
|
:Parameters:
|
|
`flip_x` : bool
|
|
If True, the returned animation will be flipped horizontally.
|
|
`flip_y` : bool
|
|
If True, the returned animation will be flipped vertically.
|
|
`rotate` : int
|
|
Degrees of clockwise rotation of the returned animation. Only
|
|
90-degree increments are supported.
|
|
|
|
:rtype: :py:class:`~pyglet.image.Animation`
|
|
"""
|
|
frames = [AnimationFrame(frame.image.get_texture().get_transform(flip_x, flip_y, rotate),
|
|
frame.duration) for frame in self.frames]
|
|
return Animation(frames)
|
|
|
|
def get_duration(self):
|
|
"""Get the total duration of the animation in seconds.
|
|
|
|
:rtype: float
|
|
"""
|
|
return sum([frame.duration for frame in self.frames if frame.duration is not None])
|
|
|
|
def get_max_width(self):
|
|
"""Get the maximum image frame width.
|
|
|
|
This method is useful for determining texture space requirements: due
|
|
to the use of ``anchor_x`` the actual required playback area may be
|
|
larger.
|
|
|
|
:rtype: int
|
|
"""
|
|
return max([frame.image.width for frame in self.frames])
|
|
|
|
def get_max_height(self):
|
|
"""Get the maximum image frame height.
|
|
|
|
This method is useful for determining texture space requirements: due
|
|
to the use of ``anchor_y`` the actual required playback area may be
|
|
larger.
|
|
|
|
:rtype: int
|
|
"""
|
|
return max([frame.image.height for frame in self.frames])
|
|
|
|
@classmethod
|
|
def from_image_sequence(cls, sequence, duration, loop=True):
|
|
"""Create an animation from a list of images and a constant framerate.
|
|
|
|
:Parameters:
|
|
`sequence` : list of `~pyglet.image.AbstractImage`
|
|
Images that make up the animation, in sequence.
|
|
`duration` : float
|
|
Number of seconds to display each image.
|
|
`loop` : bool
|
|
If True, the animation will loop continuously.
|
|
|
|
:rtype: :py:class:`~pyglet.image.Animation`
|
|
"""
|
|
frames = [AnimationFrame(image, duration) for image in sequence]
|
|
if not loop:
|
|
frames[-1].duration = None
|
|
return cls(frames)
|
|
|
|
def __repr__(self):
|
|
return "Animation(frames={0})".format(len(self.frames))
|
|
|
|
|
|
class AnimationFrame:
|
|
"""A single frame of an animation."""
|
|
|
|
__slots__ = 'image', 'duration'
|
|
|
|
def __init__(self, image, duration):
|
|
"""Create an animation frame from an image.
|
|
|
|
:Parameters:
|
|
`image` : `~pyglet.image.AbstractImage`
|
|
The image of this frame.
|
|
`duration` : float
|
|
Number of seconds to display the frame, or ``None`` if it is
|
|
the last frame in the animation.
|
|
|
|
"""
|
|
self.image = image
|
|
self.duration = duration
|
|
|
|
def __repr__(self):
|
|
return "AnimationFrame({0}, duration={1})".format(self.image, self.duration)
|