def testGeometryCircle_arc_points(self):
"""arc_points() utility function"""
def T(a,b):
self.assert_(common.vert_equal(a,b))
def F(a,b):
self.assert_(not common.vert_equal(a,b))
# test arc_points() finally
T(arc_points(0,pi,1,1),
(V(1,0),V(-1,0)))
T(arc_points(pi,0,1,1),
(V(-1,0),V(1,0)))
# three points, note rotation is always anti-clockwise
T(arc_points(0,pi,1,2),
(V(1,0),V(0,1),V(-1,0)))
T(arc_points(pi,0,1,2),
(V(-1,0),V(0,-1),V(1,0)))
# full circle
T(arc_points(0,2*pi,1,4),
(V(1,0),V(0,1),V(-1,0),V(0,-1),V(1,0)))
T(arc_points(2*pi,0,1,4), # note same result as above
(V(1,0),V(0,1),V(-1,0),V(0,-1),V(1,0)))
T(arc_points(pi / 2,pi*1.5,0.5,4),
(V(0,0.5),
V(-cos(radians(45))/2,sin(radians(45))/2),
V(-0.5,0),
V(-cos(radians(45))/2,-sin(radians(45))/2),
V(0,-0.5)))
def testGeometryCircle_arc_points(self):
"""arc_points() utility function"""
def T(a, b):
self.assert_(common.vert_equal(a, b))
def F(a, b):
self.assert_(not common.vert_equal(a, b))
# test arc_points() finally
T(arc_points(0, pi, 1, 1), (V(1, 0), V(-1, 0)))
T(arc_points(pi, 0, 1, 1), (V(-1, 0), V(1, 0)))
# three points, note rotation is always anti-clockwise
T(arc_points(0, pi, 1, 2), (V(1, 0), V(0, 1), V(-1, 0)))
T(arc_points(pi, 0, 1, 2), (V(-1, 0), V(0, -1), V(1, 0)))
# full circle
T(arc_points(0, 2 * pi, 1, 4),
(V(1, 0), V(0, 1), V(-1, 0), V(0, -1), V(1, 0)))
T(
arc_points(2 * pi, 0, 1, 4), # note same result as above
(V(1, 0), V(0, 1), V(-1, 0), V(0, -1), V(1, 0)))
T(arc_points(pi / 2, pi * 1.5, 0.5, 4),
(V(0, 0.5), V(-cos(radians(45)) / 2,
sin(radians(45)) / 2), V(-0.5, 0),
V(-cos(radians(45)) / 2, -sin(radians(45)) / 2), V(0, -0.5)))
def make_line_vertexes(a,b,thickness,segments):
# first find the angle of the given line
d = b - a
alpha = atan2(d[0,1],d[0,0])
# create half-circles for either end
arc_a = arc_points(alpha + pi/2,alpha - pi/2,float(thickness)/2,segments)
arc_b = arc_points(alpha - pi/2,alpha + pi/2,float(thickness)/2,segments)
# half circles aren't complete yet, need to shift them relative to the end
# positions
def t(vs,a):
return [v + a for v in vs]
arc_a = t(arc_a,a)
arc_b = t(arc_b,b)
return arc_a + arc_b
def make_line_vertexes(a, b, thickness, segments):
# first find the angle of the given line
d = b - a
alpha = atan2(d[0, 1], d[0, 0])
# create half-circles for either end
arc_a = arc_points(alpha + pi / 2, alpha - pi / 2,
float(thickness) / 2, segments)
arc_b = arc_points(alpha - pi / 2, alpha + pi / 2,
float(thickness) / 2, segments)
# half circles aren't complete yet, need to shift them relative to the end
# positions
def t(vs, a):
return [v + a for v in vs]
arc_a = t(arc_a, a)
arc_b = t(arc_b, b)
return arc_a + arc_b
