# ----------------------------------------------------------------------------
# pymunk
# Copyright (c) 2007-2016 Victor Blomqvist
#
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# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
# ----------------------------------------------------------------------------
"""This submodule contains helper functions to help with quick prototyping
using pymunk together with pygame.
Intended to help with debugging and prototyping, not for actual production use
in a full application. The methods contained in this module is opinionated
about your coordinate system and not in any way optimized.
"""
__docformat__ = "reStructuredText"
__all__ = [
"DrawOptions", "get_mouse_pos", "to_pygame", "from_pygame",
"positive_y_is_up"
]
import pygame
import pymunk
from pymunk.vec2d import Vec2d
positive_y_is_up = True
"""Make increasing values of y point upwards.
When True::
y
^
| . (2, 2)
|
----+------ > x
|
| . (3, -2)
|
When False::
y
^
| . (2, -2)
|
----+------ > x
|
| . (3, 2)
|
"""
[docs]class DrawOptions(pymunk.SpaceDebugDrawOptions):
[docs] def __init__(self, surface):
"""Draw a pymunk.Space on a pygame.Surface object.
Typical usage::
>>> import pymunk
>>> import pymunk.pygame_util
>>> surface = pygame.Surface((10,10))
>>> s = pymunk.Space()
>>> options = pymunk.pygame_util.DrawOptions(surface)
>>> s.debug_draw(options)
Since pygame uses a coordinate system where y points down (compared to
most other cases where a positive y points upwards), we might want to
make adjustments for that with the :py:data:`positive_y_is_up` variable.
By default drawing is done with positive y pointing up, but that will
make conversion from pygame coordinate to pymunk coordinate nessecary.
If you do a lot of those (for example, lots of mouse input) it might be
more convenient to set it to False::
>>> positive_y_is_up = False
>>> # Draw verything the pygame way, (0,0) in the top left corner
>>> positive_y_is_up = True
>>> # Draw everything the pymunk way, (0,0) in the bottom left corner
You can control the color of a shape by setting shape.color to the color
you want it drawn in.
>>> c = pymunk.Circle(None, 10)
>>> c.color = pygame.color.THECOLORS["pink"]
See pygame_util.demo.py for a full example
:Parameters:
surface : pygame.Surface
Surface that the objects will be drawn on
"""
self.surface = surface
super(DrawOptions, self).__init__()
[docs] def draw_circle(self, pos, angle, radius, outline_color, fill_color):
p = to_pygame(pos, self.surface)
pygame.draw.circle(self.surface, fill_color, p, int(radius), 0)
circle_edge = pos + Vec2d(radius, 0).rotated(angle)
p2 = to_pygame(circle_edge, self.surface)
line_r = 2 if radius > 20 else 1
pygame.draw.lines(self.surface, outline_color, False, [p,p2], line_r)
[docs] def draw_segment(self, a, b, color):
p1 = to_pygame(a, self.surface)
p2 = to_pygame(b, self.surface)
pygame.draw.aalines(self.surface, color, False, [p1,p2])
[docs] def draw_fat_segment(self, a, b, radius, outline_color, fill_color):
p1 = to_pygame(a, self.surface)
p2 = to_pygame(b, self.surface)
r = int(max(1, radius*2))
pygame.draw.lines(self.surface, fill_color, False, [p1,p2], r)
[docs] def draw_polygon(self, verts, radius, outline_color, fill_color):
ps = [to_pygame(v, self.surface) for v in verts]
ps += [ps[0]]
pygame.draw.polygon(self.surface, fill_color, ps)
if radius < 1 and False:
pygame.draw.lines(self.surface, outline_color, False, ps)
else:
pygame.draw.lines(self.surface, outline_color, False, ps, int(radius*2))
[docs] def draw_dot(self, size, pos, color):
p = to_pygame(pos, self.surface)
pygame.draw.circle(self.surface, color, p, int(size), 0)
[docs]def get_mouse_pos(surface):
"""Get position of the mouse pointer in pymunk coordinates."""
p = pygame.mouse.get_pos()
return from_pygame(p, surface)
[docs]def to_pygame(p, surface):
"""Convenience method to convert pymunk coordinates to pygame surface
local coordinates.
Note that in case positive_y_is_up is False, this function wont actually do
anything except converting the point to integers.
"""
if positive_y_is_up:
return int(p[0]), surface.get_height()-int(p[1])
else:
return int(p[0]), int(p[1])
[docs]def from_pygame(p, surface):
"""Convenience method to convert pygame surface local coordinates to
pymunk coordinates
"""
return to_pygame(p,surface)