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import os
import sys
import numpy as np
dir = os.path.split(os.path.realpath(__file__))[0]
sys.path.append(dir + '/..')
from geometry import *
from solids import build_12inch_pmt, build_12inch_pmt_with_lc
from optics import *
from transform import rotate, make_rotation_matrix
from itertools import product
from make import cylinder
def build_lbne(radius, height, nstrings, pmts_per_string, endcap_spacing):
pmt = build_12inch_pmt_with_lc()
lbne = Geometry()
# outer cylinder
cylinder_mesh = cylinder(radius, radius, height+height/(pmts_per_string-1))
cylinder_mesh.vertices = rotate(cylinder_mesh.vertices, np.pi/2, (-1,0,0))
lbne.add_solid(Solid(cylinder_mesh, water, vacuum, black_surface, 0xff))
lbne.pmtids = []
# construct the barrel
for i in range(pmts_per_string):
for j in range(nstrings):
rotation = make_rotation_matrix(j*2*np.pi/nstrings, (0,0,1))
displacement = rotate((0,-radius,-height/2+i*height/(pmts_per_string-1)), j*2*np.pi/nstrings, (0,0,1))
lbne.pmtids.append(lbne.add_solid(pmt, rotation, displacement))
# construct the top endcap
for x, y in np.array(tuple(product(\
np.arange(-radius+0.075, radius, endcap_spacing),
np.arange(-radius+0.075, radius, endcap_spacing)))):
if np.sqrt(x**2 + y**2) < radius - endcap_spacing/2:
rotation = make_rotation_matrix(+np.pi/2, (1,0,0))
displacement = (x,y,+height/2+height/(pmts_per_string-1)/2)
lbne.pmtids.append(lbne.add_solid(pmt, rotation, displacement))
# construct the bottom endcap
for x, y in np.array(tuple(product(\
np.arange(-radius+0.075, radius, endcap_spacing),
np.arange(-radius+0.075, radius, endcap_spacing)))):
if np.sqrt(x**2 + y**2) < radius - endcap_spacing/2:
rotation = make_rotation_matrix(-np.pi/2, (1,0,0))
displacement = (x,y,-height/2-height/(pmts_per_string-1)/2)
lbne.pmtids.append(lbne.add_solid(pmt, rotation, displacement))
return lbne
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