Discover the compartment modelΒΆ
The models presented in this chapter are fundamentally different from all the other models in this book. This class of model does not aim at computing positions and velocities, but rather at describing the evolution of total amounts of people in specified compartments. The compartments shall be identified to nodes of a network, those nodes are connected by edges, which corresponds to paths between nodes.
Reference : [MF2018] Chapter 6.
A compartment model example can be found in the directory
cromosim/examples/compartments/
and can be run with:
python3 compartments.py --json input.json
Results:
Compartment model : evacuation
Code:
cromosim/examples/compartments/compartments.py
# Authors:
# Sylvain Faure <sylvain.faure@universite-paris-saclay.fr>
# Bertrand Maury <bertrand.maury@universite-paris-saclay.fr>
#
# cromosim/examples/compartments/compartments.py
# python compartments.py --json input.json
#
# License: GPL
import sys, os
from cromosim import *
from cromosim.comp import *
from optparse import OptionParser
import json
"""
python compartments.py --json input.json
"""
parser = OptionParser(usage="usage: %prog [options] filename",version="%prog 1.0")
parser.add_option('--json',dest="jsonfilename",default="input.json",type="string",
action="store",help="Input json filename")
opt, remainder = parser.parse_args()
print("===> JSON filename = ",opt.jsonfilename)
with open(opt.jsonfilename) as json_file:
try:
input = json.load(json_file)
except json.JSONDecodeError as msg:
print(msg)
print("Failed to load json file ",opt.jsonfilename)
print("Check its content (https://fr.wikipedia.org/wiki/JavaScript_Object_Notation)")
sys.exit()
"""
Get parameters from json file :
For the domain :
| name: string
| Domain name
| background: string
| Image file used as background
| px: float
| Pixel size in meters (also called space step)
| width: integer
| Domain width (equal to the width of the background image)
| height: integer
| Domain height (equal to the height of the background image)
| wall_colors: list
| rgb colors for walls
| [ [r,g,b],[r,g,b],... ]
| shape_lines: list
| Used to define the Matplotlib Polyline shapes,
| [
| {
| "xx": [x0,x1,x2,...],
| "yy": [y0,y1,y2,...],
| "linewidth": float,
| "outline_color": [r,g,b],
| "fill_color": [r,g,b]
| },...
| ]
| shape_circles: list
| Used to define the Matplotlib Circle shapes,
| [
| {
| "center_x": float,
| "center_y": float,
| "radius": float,
| "outline_color": [r,g,b],
| "fill_color": [r,g,b]
| },...
| ]
| shape_ellipses: list
| Used to define the Matplotlib Ellipse shapes,
| [
| {
| "center_x": float,
| "center_y": float,
| "width": float,
| "height": float,
| "angle_in_degrees_anti-clockwise": float (degre),
| "outline_color": [r,g,b],
| "fill_color": [r,g,b]
| },...
| ]
| shape_rectangles: list
| Used to define the Matplotlib Rectangle shapes,
| [
| {
| "bottom_left_x": float,
| "bottom_left_y": float,
| "width": float,
| "height": float,
| "angle_in_degrees_anti-clockwise": float (degre),
| "outline_color": [r,g,b],
| "fill_color": [r,g,b]
| },...
| ]
| shape_polygons: list
| Used to define the Matplotlib Polygon shapes,
| [
| {
| "xy": float,
| "outline_color": [r,g,b],
| "fill_color": [r,g,b]
| },...
| ]
| destinations: list
| Used to define the Destination objects,
| [
| {
| "name": string,
| "colors": [[r,g,b],...],
| "excluded_colors": [[r,g,b],...],
| "desired_velocity_from_color": [] or
| [
| {
| "color": [r,g,b],
| "desired_velocity": [ex,ey]
| },...
| ],
| "velocity_scale": float,
| "next_destination": null or string,
| "next_domain": null or string,
| "next_transit_box": null or [[x0,y0],...,[x3,y3]]
| },...
| ]
|--------------------
prefix: string
Folder name to store the results
seed: integer
Random seed which can be used to reproduce a random selection if >0
Np_rooms: integer
Number of persons per rooms
area : float
Nrooms
RoomNames
RoomInlets
DoorCenters
RoomCenters
DoorRoomCapacity
Nsecondes
"""
jdom = input["domain"]
print("===> JSON data used to build the domain : ",jdom)
prefix = input["prefix"]
if not os.path.exists(prefix):
os.makedirs(prefix)
seed = input["seed"]
Np_rooms = input["Np_rooms"]
area = input["area"]
RoomNames = input["RoomNames"]
Np_rooms = np.array(input["Np_rooms"])
RoomInlets = input["RoomInlets"]
TravelTimeWeights = input["TravelTimeWeights"]
DoorCenters = np.array(input["DoorCenters"])
RoomCenters = np.array(input["RoomCenters"])
CircAngles = np.array(input["CircAngles"])
DoorRoomCapacity = input["DoorRoomCapacity"]
Nsecondes = input["Nsecondes"]
print("===> Number of persons per rooms : ",Np_rooms)
Np = 0
for n in Np_rooms:
Np += n
print("===> Number of persons : ",Np)
Nrooms = len(RoomNames)
print("===> Number of rooms : ",Nrooms)
print("===> Capacity of each exit door : ",DoorRoomCapacity)
"""
Build the Domain objects
"""
jname = jdom["name"]
print("===> Build domain ",jname)
jbg = jdom["background"]
jpx = jdom["px"]
jwidth = jdom["width"]
jheight = jdom["height"]
jwall_colors = jdom["wall_colors"]
if (jbg==""):
dom = Domain(name=jname, pixel_size=jpx, width=jwidth, height=jheight,
wall_colors=jwall_colors)
else:
dom = Domain(name=jname, background=jbg, pixel_size=jpx,
wall_colors=jwall_colors)
## To add lines : Line2D(xdata, ydata, linewidth)
for sl in jdom["shape_lines"]:
line = Line2D(sl["xx"],sl["yy"],linewidth=sl["linewidth"])
dom.add_shape(line,outline_color=sl["outline_color"],
fill_color=sl["fill_color"])
## To add circles : Circle( (center_x,center_y), radius )
for sc in jdom["shape_circles"]:
circle = Circle( (sc["center_x"], sc["center_y"]), sc["radius"] )
dom.add_shape(circle,outline_color=sc["outline_color"],
fill_color=sc["fill_color"])
## To add ellipses : Ellipse( (center_x,center_y), width, height,
## angle_in_degrees_anti-clockwise )
for se in jdom["shape_ellipses"]:
ellipse = Ellipse( (se["center_x"], se["center_y"]),
se["width"], se["height"],
se["angle_in_degrees_anti-clockwise"])
dom.add_shape(ellipse,outline_color=se["outline_color"],
fill_color=se["fill_color"])
## To add rectangles : Rectangle( (bottom_left_x,bottom_left_y), width, height,
## angle_in_degrees_anti-clockwise )
for sr in jdom["shape_rectangles"]:
rectangle = Rectangle( (sr["bottom_left_x"],sr["bottom_left_y"]),
sr["width"], sr["height"],
sr["angle_in_degrees_anti-clockwise"])
dom.add_shape(rectangle,outline_color=sr["outline_color"],
fill_color=sr["fill_color"])
## To add polygons : Polygon( [[x0,y0],[x1,y1],...] )
for spo in jdom["shape_polygons"]:
polygon = Polygon(spo["xy"])
dom.add_shape(polygon,outline_color=spo["outline_color"],
fill_color=spo["fill_color"])
## To build the domain : background + shapes
dom.build_domain()
## To add all the available destinations
for j,dd in enumerate(jdom["destinations"]):
desired_velocity_from_color=[]
for gg in dd["desired_velocity_from_color"]:
desired_velocity_from_color.append(
np.concatenate((gg["color"],gg["desired_velocity"])))
dest = Destination(name=dd["name"],colors=dd["colors"],
excluded_colors=dd["excluded_colors"],
desired_velocity_from_color=desired_velocity_from_color,
velocity_scale=dd["velocity_scale"],
next_destination=dd["next_destination"],
next_domain=dd["next_domain"],
next_transit_box=dd["next_transit_box"])
print("===> Destination : ",dest)
dom.add_destination(dest)
dom.plot_desired_velocity(dd["name"],id=10+j,step=20)
print("===> Domain : ",dom)
dom.plot(id=0)
dom.plot_wall_dist(id=1,step=20)
## Maximal number of inlets for a room
NiorMax = 0
## Number of inlets for each room
Nior = []
for ri in RoomInlets:
NiorMax = max(NiorMax,len(ri))
Nior.append(len(ri))
print("===> Maximal number of inlets for a room : ",NiorMax)
print("===> Number of inlets for each room : ",Nior)
## Room numbers associate to the inlets for each room
List_iOr = np.zeros([Nrooms,NiorMax],dtype=int)
for i,ri in enumerate(RoomInlets):
List_iOr[i,:len(ri)] = ri
#print("===> Room numbers associate to the inlets for each room",List_iOr)
## Compute travel times :
T_iOr = np.zeros([Nrooms,NiorMax],dtype=int)
for ir in np.arange(Nrooms):
for i in np.arange(Nior[ir]):
jr = List_iOr[ir,i]
ij_exit = np.rint(DoorCenters[ir,:2]/dom.pixel_size).astype(int)
ij_entrance = np.rint(DoorCenters[jr,:2]/dom.pixel_size).astype(int)
T_iOr[ir,i] = np.ceil( \
dom.destinations["door"].distance.data[ij_entrance[1],ij_entrance[0]] - \
dom.destinations["door"].distance.data[ij_exit[1],ij_exit[0]] )
T_iOr[ir,i] = TravelTimeWeights[ir][i]*T_iOr[ir,i]
print("Travel times : ",T_iOr)
NPrir = np.zeros([Nrooms,NiorMax])
## Number of persons for each room
NPir = np.zeros([Nsecondes , Nrooms])
NPir[0,:] = Np_rooms
## Number of persons who's waiting to leave each room
NPwir = np.zeros([Nsecondes , Nrooms])
NPwir[0,:]=NPir[0,:]
## Nrooms of persons upstream the exit
Flux = np.zeros([Nsecondes , Nrooms])
print("--> NPir at t=0 : ",NPir[0,:].sum())
it=0
plot_compt(5, RoomNames, RoomCenters, DoorCenters, CircAngles, NPir[it,:],
NPrir, NPwir[it,:], Nior, List_iOr, dom, area, savefig=True,
filename=prefix+"fig_"+str(it).zfill(6)+".png",
title='time = '+str(it)+' s')
for it in np.arange(1,Nsecondes):
Flux,NPir,NPwir,NPrir = iteration(it, Nrooms, DoorRoomCapacity, NPir, NPrir,
NPwir, Nior, List_iOr, T_iOr, Flux)
print("---------> it = ",it)
#print("--> Flux : ",Flux)
print("--> NPir : ",NPir[it,:])
#print("--> NPwir : ",NPwir[it,:])
#print("--> NPrir : ",NPrir)
plot_compt(5, RoomNames, RoomCenters, DoorCenters, CircAngles, NPir[it,:],
NPrir, NPwir[it,:], Nior, List_iOr, dom, area, savefig=True,
filename=prefix+"fig_"+str(it).zfill(6)+".png",
title='time = '+str(it)+' s')
plt.show()