Source code for pymunk.pyglet_util

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"""This submodule contains helper functions to help with quick prototyping 
using pymunk together with pyglet.

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 very optimized (they use batched 
drawing, but there is probably room for optimizations still). 
"""

__docformat__ = "reStructuredText"

__all__ = ["DrawOptions"]


import math

import pyglet

import pymunk
from pymunk.vec2d import Vec2d

[docs]class DrawOptions(pymunk.SpaceDebugDrawOptions):
[docs] def __init__(self, **kwargs): """Draw a pymunk.Space. Typical usage:: >>> import pymunk >>> import pymunk.pygame_util >>> s = pymunk.Space() >>> options = pymunk.pyglet_util.DrawOptions() >>> s.debug_draw(options) 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 = (255, 0, 0, 255) # will draw my_shape in red You can optionally pass in a batch to use for drawing. Just remember that you need to call draw yourself. >>> my_batch = pyglet.graphics.Batch() >>> s = pymunk.Space() >>> options = pymunk.pyglet_util.DrawOptions(batch=my_batch) >>> s.debug_draw(options) >>> my_batch.draw() See pyglet_util.demo.py for a full example :Param: kwargs : You can optionally pass in a pyglet.graphics.Batch If a batch is given all drawing will use this batch to draw on. If no batch is given a a new batch will be used for the drawing. Remember that if you pass in your own batch you need to call draw on it yourself. """ self.new_batch = False if "batch" not in kwargs: self.new_batch = True else: self.batch = kwargs["batch"] super(DrawOptions, self).__init__()
def __enter__(self): if self.new_batch: self.batch = pyglet.graphics.Batch() def __exit__(self, type, value, traceback): if self.new_batch: self.batch.draw()
[docs] def draw_circle(self, pos, angle, radius, outline_color, fill_color): circle_center = pos #http://slabode.exofire.net/circle_draw.shtml num_segments = int(4 * math.sqrt(radius)) theta = 2 * math.pi / num_segments c = math.cos(theta) s = math.sin(theta) x = radius # we start at angle 0 y = 0 ps = [] for i in range(num_segments): ps += [Vec2d(circle_center.x + x, circle_center.y + y)] t = x x = c * x - s * y y = s * t + c * y mode = pyglet.gl.GL_TRIANGLE_STRIP ps2 = [ps[0]] for i in range(1, int(len(ps)+1/2)): ps2.append(ps[i]) ps2.append(ps[-i]) ps = ps2 vs = [] for p in [ps[0]] + ps + [ps[-1]]: vs += [p.x, p.y] c = circle_center + Vec2d(radius, 0).rotated(angle) cvs = [circle_center.x, circle_center.y, c.x, c.y] bg = pyglet.graphics.OrderedGroup(0) fg = pyglet.graphics.OrderedGroup(1) l = len(vs)//2 self.batch.add(len(vs)//2, mode, bg, ('v2f', vs), ('c4B', fill_color.as_int()*l)) self.batch.add(2, pyglet.gl.GL_LINES, fg, ('v2f', cvs), ('c4B', outline_color.as_int()*2))
[docs] def draw_segment(self, a, b, color): pv1 = a pv2 = b line = (int(pv1.x), int(pv1.y), int(pv2.x), int(pv2.y)) self.batch.add(2, pyglet.gl.GL_LINES, None, ('v2i', line), ('c4B', color.as_int() * 2))
[docs] def draw_fat_segment(self, a, b, radius, outline_color, fill_color): pv1 = a pv2 = b d = pv2 - pv1 atan = -math.atan2(d.x, d.y) radius = max(radius, 1) dx = radius * math.cos(atan) dy = radius * math.sin(atan) p1 = pv1 + Vec2d(dx,dy) p2 = pv1 - Vec2d(dx,dy) p3 = pv2 + Vec2d(dx,dy) p4 = pv2 - Vec2d(dx,dy) vs = [i for xy in [p1,p2,p3]+[p2,p3,p4] for i in xy] l = len(vs)//2 self.batch.add(l,pyglet.gl.GL_TRIANGLES, None, ('v2f', vs), ('c4B', fill_color.as_int() * l)) self.draw_circle(a, 0, radius, fill_color, fill_color) self.draw_circle(b, 0, radius, fill_color, fill_color)
[docs] def draw_polygon(self, verts, radius, outline_color, fill_color): mode = pyglet.gl.GL_TRIANGLE_STRIP l = len(verts) mid = len(verts) // 2 if radius >= 3: #print("POLY", verts) pass vs = [] for i in range(mid): vs += [verts[i].x, verts[i].y] vs += [verts[l-1-i].x, verts[l-1-i].y] if l%2: vs += [verts[mid].x, verts[mid].y] vs = [vs[0], vs[1]] + vs + [vs[-2], vs[-1]] l = len(vs)//2 self.batch.add(l, mode, None, ('v2f', vs), ('c4B', fill_color.as_int()*l)) if radius > 0: for i in range(len(verts)): a = verts[i] b = verts[(i+1) % len(verts)] #print(a, b) self.draw_fat_segment(a, b, radius, outline_color, outline_color)
[docs] def draw_dot(self, size, pos, color): # todo: optimize this functions self.batch.add(1, pyglet.gl.GL_POINTS, grPointSize(size), ('v2f', pos), ('c4B', color.as_int()*1))
class grPointSize(pyglet.graphics.Group): """ This pyglet rendering group sets a specific point size. """ def __init__(self, size=1.0): super(grPointSize, self).__init__() self.size = size def set_state(self): pyglet.gl.glPointSize(self.size) def unset_state(self): pyglet.gl.glPointSize(1.0)