def ngon_outline(x, y, r, sides, start_angle = 0.0):
"""
Draw the outline of a polygon of n sides of equal length.
@param x, y: center position
@param r: radius
@param sides: number of sides in the polygon
@param start_angle: rotation of the entire polygon
"""
if r < 1.0: return
#This is necessary if you think about it.
line_spacing = graphics.line_size/2/math.cos(math.pi/sides)
points_inner = list(_iter_ngon(x, y, r-line_spacing, sides, start_angle))
points_outer = list(_iter_ngon(x, y, r+line_spacing, sides, start_angle))
points_stroke = _concat(_concat(zip(points_inner, points_outer)))
points_stroke.extend(points_stroke[:4]) # draw the first *two* points again
points_inner = _concat(points_inner)
points_outer = _concat(points_outer)
if graphics.line_size > 1:
pyglet.gl.glLineWidth(1)
pyglet.graphics.draw(len(points_stroke)/2,
pyglet.gl.GL_TRIANGLE_STRIP, ('v2f', points_stroke))
# pyglet.graphics.draw(len(points_inner)/2,
# pyglet.gl.GL_LINE_LOOP, ('v2f', points_inner))
else:
graphics.disable_line_smoothing()
pyglet.graphics.draw(len(points_outer)/2,
pyglet.gl.GL_LINE_LOOP, ('v2f', points_outer))
graphics.enable_line_smoothing()
def line(x1, y1, x2, y2):
if graphics.line_size <= 1.0:
graphics.disable_line_smoothing()
pyglet.graphics.draw(2, pyglet.gl.GL_LINES, ('v2f', (x1, y1, x2, y2)))
graphics.enable_line_smoothing()
return
angle = math.atan2(y2-y1, x2-x1)
x_add = math.cos(angle+math.pi/2)*graphics.line_size/2
y_add = math.sin(angle+math.pi/2)*graphics.line_size/2
rx1, ry1 = x1 + x_add, y1 + y_add
rx2, ry2 = x2 + x_add, y2 + y_add
rx3, ry3 = x2 - x_add, y2 - y_add
rx4, ry4 = x1 - x_add, y1 - y_add
pyglet.graphics.draw(4, pyglet.gl.GL_QUADS, ('v2f', (rx1,ry1,rx2,ry2,rx3,ry3,rx4,ry4)))
def ellipse_outline(x1, y1, x2, y2, dashed=False):
"""
@param x1, y1, x2, y2: bounding box corners
@param dashed: draws only every other segment if enabled
"""
if abs(x2-x1) < 1.0 or abs(y2-y1) < 1.0: return
w2 = graphics.line_size / 2.0
x_dir = 1 if x2 > x1 else -1
y_dir = 1 if y2 > y1 else -1
x1_out = x1 - x_dir * w2
x1_in = x1 + x_dir * w2
x2_out = x2 + x_dir * w2
x2_in = x2 - x_dir * w2
y1_out = y1 - y_dir * w2
y1_in = y1 + y_dir * w2
y2_out = y2 + y_dir * w2
y2_in = y2 - y_dir * w2
points_inner = list(_iter_ellipse(x1_in, y1_in, x2_in, y2_in, da=0.1, dashed=dashed))
points_outer = list(_iter_ellipse(x1_out, y1_out, x2_out, y2_out, da=0.1, dashed=dashed))
points_stroke = _concat(_concat(zip(points_inner, points_outer)))
points_stroke.extend(points_stroke[:4]) # draw the first *two* points again
points_inner = _concat(points_inner)
points_outer = _concat(points_outer)
if graphics.line_size > 1:
pyglet.gl.glLineWidth(1)
if abs(x2_out-x1_out) < graphics.line_size*2 or abs(y2_out-y1_out) < graphics.line_size*2:
pyglet.graphics.draw(len(points_outer)/2,
pyglet.gl.GL_TRIANGLE_FAN, ('v2f', points_outer))
else:
pyglet.graphics.draw(len(points_stroke)/2,
pyglet.gl.GL_TRIANGLE_STRIP, ('v2f', points_stroke))
# pyglet.graphics.draw(len(points_inner)/2,
# pyglet.gl.GL_LINE_LOOP, ('v2f', points_inner))
else:
graphics.disable_line_smoothing()
pyglet.graphics.draw(len(points_outer)/2,
pyglet.gl.GL_LINE_LOOP, ('v2f', points_outer))
graphics.enable_line_smoothing()
