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diff --git a/script/2018.12.8-hex-speaker-spiral.py b/script/2018.12.8-hex-speaker-spiral.py
new file mode 100644
index 0000000000000000000000000000000000000000..c877f7f106e9dd6e6ac0d4c941826f60b64956f6
--- /dev/null
+++ b/script/2018.12.8-hex-speaker-spiral.py
@@ -0,0 +1,162 @@
+#!/usr/bin/env python
+from __future__ import division,absolute_import
+import rhinoscriptsyntax as rs
+from math import *
+import sys
+
+#simple class for vec2
+class V2(object):
+ def __init__(self,*args):
+ if len(args)>1:
+ self.x = args[0]
+ self.y = args[1]
+ else:
+ self.x = args[0][0]
+ self.y = args[0][1]
+ self.p3l = [self.x,self.y,0]
+ def __add__(self,other):
+ return V2(self.x+other.x,self.y+other.y)
+ def __sub__(self,other):
+ return V2(self.x-other.x,self.y-other.y)
+ def __mul__(self,other):
+ try:
+ return V2(self.x*other.x,self.y*other.y)
+ except(AttributeError):
+ return V2(self.x*other,self.y*other)
+ def __rmul__(self,other):
+ try:
+ return V2(self.x*other.x, self.y*other.y)
+ except(AttributeError):
+ return V2(self.x*other,self.y*other)
+ def __getitem__(self,index):
+ return [self.x,self.y][index]
+ def __repr__(self):
+ return "V2(%.6f,%.6f)"%(self.x,self.y)
+ def rotate(self,th):
+ return V2(self.x*cos(th)-self.y*sin(th), self.x*sin(th)+self.y*cos(th))
+ def rotate90(self):
+ return V2(-self.y,self.x)
+ def rotate_p(self,b,th):
+ return b + (self-b).rotate(th)
+ def magnitude(self):
+ return sqrt(self.x*self.x + self.y*self.y)
+ def normalized(self):
+ return self*(1./self.magnitude())
+ def dot(self,other):
+ return self.x*other.x + self.y*other.y
+ def cross(self,other):
+ return self.x*other.y - self.y*other.x
+ def angle_between(self,other):
+ #unsigned angle between two vectors
+ c = self.cross(other)
+ return atan2(c,self.dot(other))
+ def projected_onto(self,other):
+ return ((self.dot(other))/(other.dot(other)))*other
+ def projected_orthogonal_to(self,other):
+ return self - self.projected_onto(other)
+
+ def close(self,other,tol=1e-6):
+ return (abs(self.x-other.x)<tol) and (abs(self.y-other.y)<tol)
+ def p3lz(self,z):
+ return [self.x,self.y,z]
+
+# a few helper functions
+def line(p1,p2,layer,bridge_w=0,cut_w=0):
+ d = p2-p1; dl = d.magnitude()
+ if dl==0:
+ return None
+ dn = d.normalized()
+ if bridge_w==0 or cut_w==0:
+ rs.CurrentLayer(layer)
+ return rs.AddLine(p1.p3l, p2.p3l)
+ else:
+ rs.CurrentLayer(layer)
+ output = []; dist = bridge_w
+ ds = []
+ while dist < dl-2*bridge_w:#-cut_w:
+ ds.append((dist, dist+cut_w))
+ #print bridge_w, (p1+dist*dn).p3l , (p1+(dist+bridge_w)*dn).p3l
+ dist += cut_w+bridge_w
+ #leftover = dl-bridge_w-cut_w - dist + cut_w+bridge_w
+ leftover = dl-bridge_w - dist + cut_w+bridge_w
+ for pair in ds:
+ output.append(rs.AddLine( (p1+(pair[0] + leftover/2)*dn).p3l , (p1+(pair[1]+ leftover/2)*dn).p3l) )
+
+ return output
+def circle(c,d,layer):
+ rs.CurrentLayer(layer)
+ return rs.AddCircle(c.p3l, .5*d)
+def arc(c,d,th1,th2,layer):
+ rs.CurrentLayer(layer)
+ p1 = c + d/2*V2(cos(pi/180.*th1),sin(pi/180.*th1))
+ p2 = c + d/2*V2(cos(pi/180.*th2),sin(pi/180.*th2))
+ pm = c + d/2*V2(cos(pi/180.*(th1+th2)/2),sin(pi/180.*(th1+th2)/2))
+ return rs.AddArc3Pt(p1.p3l,p2.p3l,pm.p3l)
+def filleted_hex(c,R,r,layer):
+ crvs = []
+ x = r/sqrt(3)
+ for i in range(6):
+ v0 = R*V2(cos(i*2*pi/6),sin(i*2*pi/6))
+ v1 = R*V2(cos((i+1)*2*pi/6),sin((i+1)*2*pi/6))
+ d = (v1 - v0).normalized()
+ crvs.append( line( c+v0 + x*d, c+v1 - x*d, layer) )
+ crvs.append( arc( c+v0-2*x*v0.normalized(),2*r,-30+i*60,30+i*60, layer) )
+ return crvs
+
+
+
+
+
+
+#main
+def main():
+ rs.AddLayer('magnets_a',(255,0,0))
+ rs.AddLayer('magnets_b',(0,255,255))
+ rs.AddLayer('holes',(0,255,0))
+ rs.AddLayer('coils',(0,0,255))
+ rs.AddLayer('frame',(255,0,255))
+
+ mag_d = 3.12 #mm, diameter of magnets, as cut by laser
+ hole_d = 6 #mm, diameter of air hole
+ s = 6 #mm, hex lattice side length (2xmag_d?)
+ s32 = s*sqrt(3)/2.
+ frame_inner = 60 #mm, radius / side length of inner hex of frame
+ frame_inner_fillet = 10 #mm, fillet radius
+ frame_outer = 80 #mm, radius / side length of outer hex of frame
+ frame_outer_fillet = 20 #mm, fillet radius
+ frame_bolt_d = 4.1 #mm, diameter of bolt holes
+
+ wire_pitch = 2*.088 #mm, pitch, .088 = measured diameter (.080) + .008 mm slop (10% applied)
+ N = 11 #number of turns
+ Nr = 4 #number of radial layers in the hex lattice
+
+ #make frame
+ frame = []
+ frame += filleted_hex(V2(0,0), frame_inner, frame_inner_fillet, 'frame')
+ frame += filleted_hex(V2(0,0), frame_outer, frame_outer_fillet, 'frame')
+ for i in range(6):
+ v0 = .5*(frame_inner+frame_outer)*V2(cos(i*2*pi/6),sin(i*2*pi/6))
+ v1 = .5*(frame_inner+frame_outer)*V2(cos((i+1)*2*pi/6),sin((i+1)*2*pi/6))
+ frame += [
+ circle(v0, frame_bolt_d, 'frame'),
+ circle(.5*(v0+v1), frame_bolt_d, 'frame'),
+ ]
+
+ #make magnet grid and air hole grid
+ magnets = [];
+ magnets += [circle(V2(0,0),mag_d,'magnets_a')]
+ for i in range(3): #3-fold angular symmetry
+ vr = V2(cos(i*2*pi/3),sin(i*2*pi/3))
+ vth = V2(cos(i*2*pi/3+pi/2),sin(i*2*pi/3+pi/2))
+ vk = V2(cos((i+1)*2*pi/3),sin((i+1)*2*pi/3))
+ for j in range(Nr):
+ for k in range(Nr+1):
+ magnets += [circle(2*s32*vr*(j+1) + 2*s32*vk*k, mag_d, 'magnets_a')]
+ if k<Nr:
+ magnets += [
+ circle(2*s32*vr*(j+.5) + 2*s32*vk*k + .5*s*vth, mag_d, 'magnets_b'),
+ circle(2*s32*vr*j + 2*s32*vk*k + s*vth, hole_d, 'holes'),
+ ]
+
+if __name__ == '__main__':
+ main()
\ No newline at end of file