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Particle.py
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Particle.py
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from __future__ import absolute_import
# Visualization of particles with gravity
# Source: http://enja.org/2010/08/27/adventures-in-opencl-part-2-particles-with-opengl/
try:
import sys # System tools (path, modules, maxint)
import matplotlib as mpl
import matplotlib.pyplot as plt
from mpl_toolkits.mplot3d import axes3d
from matplotlib.ticker import ScalarFormatter
import numpy as np
from matplotlib.backends.backend_pdf import PdfPages
import gzip
import pyopencl as cl # OpenCL - GPU computing interface
from pyopencl.tools import get_gl_sharing_context_properties
from OpenGL.GL import * # OpenGL - GPU rendering interface
from OpenGL.GLU import * # OpenGL tools (mipmaps, NURBS, perspective projection, shapes)
from OpenGL.GLUT import * # OpenGL tool to make a visualization window
from OpenGL.arrays import vbo
import argparse
except ImportError as e:
print e
raise ImportError
mf = cl.mem_flags
np.set_printoptions(threshold=np.nan)
# OpenGL window dimensions and perspective
width = 1000
height = 800
zoom = 40.
#zoom = 60.
# Species dictionary
# Species name, mass, massMeV, masseV, masskg, chargeC
particleDict = {
"proton": [ 10439684078.6 , 938.272013 , 938272013.0 , 1.67262161014e-27 , 1.602176462e-19 ],
"helium": [ 41472686429.3 , 3727.37917045 , 3727379170.45 , 6.64465620129e-27 , 3.204352924e-19 ],
"carbon": [ 1.24371227955e+11 , 11177.928521 , 11177928521.0 , 1.9926465398e-26 , 9.613058772e-19 ],
"oxygen": [ 1.65775597689e+11 , 14899.1676931 , 14899167693.1 , 2.65601760592e-26 , 1.2817411696e-18 ],
"neon": [ 2.07207027869e+11 , 18622.8389368 , 18622838936.8 , 3.31982222813e-26 , 1.602176462e-18 ],
"magnesium": [ 2.48587424065e+11 , 22341.9234747 , 22341923474.7 , 3.98280919586e-26 , 1.9226117544e-18 ],
"silicon": [ 2.89960392271e+11 , 26060.3404182 , 26060340418.2 , 4.64567715409e-26 , 2.2430470468e-18 ],
"iron": [ 5.79724738538e+11 , 52103.0611003 , 52103061100.3 , 9.28821330525e-26 , 4.1656588012e-18 ],
"electron": [ 5685629.65855 , 0.51099891 , 510998.91 , 9.10938201058e-31 , -1.602176462e-19 ],
"positron": [ 5685629.65855 , 0.51099891 , 510998.91 , 9.10938201058e-31 , 1.602176462e-19 ]
}
nx, ny, nz = 100, 100, 100
num_points = nx*ny*nz
# Can request species at command line
p = argparse.ArgumentParser(description="Script to Run an Particle Propagator on the GPU")
p.add_argument("-s", "--species", dest="species", default="proton", required=False, help="Species type")
p.add_argument("-e", "--Emin", dest="Emin", default=1e7, type=float, required=False, help="Minimum Energy (eV)")
p.add_argument("-E", "--Emax", dest="Emax", default=1e14, type=float, required=False, help="Maximum Energy (eV)")
p.add_argument("-n", "--num_particles", dest="num_particles", default=1000, type=int, required=False, help="Number of Particles to Simulate")
args = p.parse_args()
# Get AERIE particle object
partProps = particleDict[args.species.lower()]
# Number of test particles
num_particles = args.num_particles
#num_particles = num_points#args.num_particles
# Particle Properties
Emin = args.Emin
Emax = args.Emax
emax = np.log10(Emax)
erange = np.log10(Emax)-np.log10(Emin)
pmass = partProps[0]
massMeV = partProps[1]
masseV = partProps[2]
masskg = partProps[3]
chargeC = partProps[4]
print "\n\n"
print "Particle Properties: species\tmass [MeV]\tmass [eV]\tmass [kg]\tcharge [C]"
print "\t\t %s\t%.02e\t%.02e\t%.02e\t%.02e"%(args.species, massMeV, masseV, masskg, chargeC)
print "\n\n"
# Solar's radius in m
Sun_radius = 6.957*10**8
# Set scale of positions and velocities
outer_radius = 20.501
inner_radius = 20.5
norm_vel = 1
# Set the time step and pause functionality
time_step = 0.05
#time_step = 0.0005
time_pause_var = time_step
# Set initial step to 0 to start paused
time_step = 0
# Mouse functionality
mouse_down = False
mouse_old = {'x': 0., 'y': 0.}
rotate = {'x': -55., 'y': 0., 'z': 45.}
translate = {'x': 0., 'y': 0., 'z': 0.}
initial_translate = {'x': 0., 'y': 0., 'z': -outer_radius}
# Cos ( Zenith )
thetaMin = 0 * np.pi/180
cosThetaMax = np.cos(thetaMin)
thetaMax = 180 * np.pi/180
#thetaMax = 30 * np.pi/180
#thetaMax = 90 * np.pi/180
cosThetaMin = np.cos(thetaMax)
def glut_window():
global initRun
glutInit(sys.argv)
glutInitDisplayMode(GLUT_RGBA | GLUT_DOUBLE | GLUT_DEPTH)
glutInitWindowSize(width, height)
glutInitWindowPosition(0, 0)
window = glutCreateWindow("Particle Simulation")
#glClearColor(0.0,0.0,0.0,0.0) # Black Background
glClearColor(1.0,1.0,1.0,0.0) # White Background
glutDisplayFunc(on_display) # Called by GLUT every frame
glutKeyboardFunc(on_key)
glutMouseFunc(mouse)
glutMotionFunc(motion)
glutTimerFunc(10, on_timer, 10) # Call draw every 30 ms
return(window)
def initial_buffers(num_particles):
# Load heliosphere table
fdata = gzip.open('../LZ019500_sorted_uniq.dat.gz','rb')
#nx, ny, nz = 10, 10, 10
#nx, ny, nz = 312, 288, 288
np_datax = np.zeros((num_points), dtype=np.float32)
np_datay = np.zeros((num_points), dtype=np.float32)
np_dataz = np.zeros((num_points), dtype=np.float32)
for line in fdata:
# x y z bx by bz
row = line.strip().split()
if (len(row)==3):
nxx, nyy, nzz = int(row[0]), int(row[1]), int(row[2])
else:
ix, iy, iz = int(row[0]), int(row[1]), int(row[2])
bx, by, bz = float(row[3]), float(row[4]), float(row[5])
#if (ix < 10 and iy < 10 and iz < 10):
if (ix < nx and iy < ny and iz < nz):
idx = ix + nx*(iy + ny*iz)
#idx = ix + ny*(iy + nz*iz)
# Units are uG so * 10^-6 to G then * 10^-4 to T
np_datax[idx] = bx*10**-4#10
np_datay[idx] = by*10**-4#10
np_dataz[idx] = bz*10**-4#10
#np_datax[ix,iy,iz] = bx*10**-4#10
#np_datay[ix,iy,iz] = by*10**-4#10
#np_dataz[ix,iy,iz] = bz*10**-4#10
if (ix > nx and iy > ny and iz > nz):
break
# Initialize particle properties
np_life = np.ndarray((num_particles,1), dtype=np.bool)
np_position = np.ndarray((num_particles, 4), dtype=np.float32)
np_color = np.ndarray((num_particles, 4), dtype=np.float32)
np_velocity = np.ndarray((num_particles, 4), dtype=np.float32)
np_zmel = np.ndarray((num_particles, 4), dtype=np.float32)
## Test values
Energy_array = 10**np.random.uniform(np.log10(Emin),np.log10(Emax),num_particles)
#Energy_array = np.logspace(np.log10(Emin),np.log10(Emax),num_particles)
Gamma_array = Energy_array/masseV+1.
np_zmel[:,0] = -chargeC
np_zmel[:,1] = masskg
np_zmel[:,2] = Energy_array
np_zmel[:,3] = Gamma_array
np_life[:] = True
# Start particles just beyond Sun radius (1.1)
np_position[:,0:3] = 1.1,1.1,1.1
npr = np.sqrt(3*1.1**2)
np_position[:,3] = npr
for i in range(num_particles):
# Generate random local spherical vector
rZen = np.arccos(np.random.uniform(cosThetaMin,cosThetaMax,1))[0]
rAzi = 2*np.pi*np.random.random()
np_velocity[i,0] = np.sin(rZen)*np.cos(rAzi)
np_velocity[i,1] = np.sin(rZen)*np.sin(rAzi)
np_velocity[i,2] = np.cos(rZen)
# Arrays for OpenGL bindings
gl_position = vbo.VBO(data=np_position, usage=GL_DYNAMIC_DRAW, target=GL_ARRAY_BUFFER)
gl_position.bind()
gl_color = vbo.VBO(data=np_color, usage=GL_DYNAMIC_DRAW, target=GL_ARRAY_BUFFER)
gl_color.bind()
return (np_datax, np_datay, np_dataz, np_life, np_position, np_velocity, np_zmel, gl_position, gl_color)
def on_timer(t):
glutTimerFunc(t, on_timer, t)
glutPostRedisplay()
def on_key(*args):
global time_step
if args[0] == ' ' or args[0] == 'p':
time_step = time_pause_var-time_step
if args[0] == '\033' or args[0] == 'q':
sys.exit()
def mouse(button, state, x, z):
global action
if (button==GLUT_LEFT_BUTTON):
action = "ROTATE"
elif (button==GLUT_RIGHT_BUTTON):
action = "ZOOM"
elif (button==GLUT_MIDDLE_BUTTON):
action = "TRANS"
mouse_old['x'] = x
mouse_old['z'] = z
def on_mouse_rotate(x, z):
rotate['x'] += (z - mouse_old['z']) * .1#2
rotate['z'] += (x - mouse_old['x']) * .1#2
def on_mouse_trans(x, z):
translate['x'] += x - mouse_old['x']
translate['z'] += z - mouse_old['z']
def on_mouse_zoom(x, z):
global zoom
zoom -= z - mouse_old['z']
if (zoom > 150.):
zoom = 150.
elif zoom < 1:
zoom = 1.1
def motion(x, z):
if action=="ROTATE":
on_mouse_rotate(x, z)
elif action=="ZOOM":
on_mouse_zoom(x, z)
elif action=="TRANS":
on_mouse_trans(x, z)
else:
print("Unknown action\n")
mouse_old['x'] = x
mouse_old['z'] = z
glutPostRedisplay()
def axis(length):
""" Draws an axis (basicly a line with a cone on top) """
glPushMatrix()
glBegin(GL_LINES)
glVertex3d(0,0,0)
glVertex3d(0,0,length)
glEnd()
glTranslated(0,0,length)
glutWireCone(0.04,0.2, 12, 9)
glPopMatrix()
def Haxis(length):
""" Draws an axis (basicly a line with a cone on top) """
glPushMatrix()
glBegin(GL_LINES)
glVertex3d(0,0,1.)
glVertex3d(0,0,length)
glEnd()
glTranslated(0,0,length)
glutWireCone(0.04,0.2, 12, 9)
glPopMatrix()
def threeAxis(length):
""" Draws an X, Y and Z-axis """
glPushMatrix()
# Z-axis
glColor3f(1.0,0.0,0.0)
axis(length)
# X-axis
glRotated(90,0,1.0,0)
glColor3f(0.0,1.0,0.0)
axis(length)
# Y-axis
glRotated(-90,1.0,0,0)
glColor3f(0.0,0.0,1.0)
axis(length)
## HAWC Normal
#glRotated(187,1.0,0,0)
#glRotated(-19,0,1.0,0)
#glColor3f(0.0,0.0,0.0)
##glColor3f(1.0,1.0,1.0)
#Haxis(2*length)
glPopMatrix()
def on_display():
"""Render the particles"""
# Update or particle positions by calling the OpenCL kernel
cl.enqueue_acquire_gl_objects(queue, [cl_gl_position, cl_gl_color])
kernelargs = (cl_datax, cl_datay, cl_dataz, cl_life, cl_gl_position, cl_velocity, cl_zmel, cl_gl_color, cl_start_position, cl_start_velocity, np.float32(emax), np.float32(erange), np.float32(time_step))
gsize = num_particles #if num_points < num_particles else num_points
#tab_size = 312 * 288 * 288 * 6
program.particle_fountain(queue, (gsize,), None, *(kernelargs))
cl.enqueue_release_gl_objects(queue, [cl_gl_position, cl_gl_color])
queue.finish()
glFlush()
glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT)
glMatrixMode(GL_MODELVIEW)
glLoadIdentity()
glViewport(0, 0, width, height)
glMatrixMode(GL_PROJECTION)
glLoadIdentity()
gluPerspective(zoom, width / float(height), .1, 10000.)
# Handle mouse transformations
glTranslatef(initial_translate['x'], initial_translate['y'], initial_translate['z'])
glRotatef(rotate['x'], 1, 0, 0)
glRotatef(rotate['z'], 0, 0, 1)
glTranslatef(translate['x'], translate['y'], translate['z'])
# Render the particles
glEnable(GL_POINT_SMOOTH)
glPointSize(2)
glEnable(GL_BLEND)
glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_SRC_ALPHA)
# Set up the VBOs
gl_color.bind()
glColorPointer(4, GL_FLOAT, 0, gl_color)
gl_position.bind()
glVertexPointer(4, GL_FLOAT, 0, gl_position)
glEnableClientState(GL_VERTEX_ARRAY)
glEnableClientState(GL_COLOR_ARRAY)
# Draw the VBOs
glDrawArrays(GL_POINTS, 0, num_particles)
glDisableClientState(GL_COLOR_ARRAY)
glDisableClientState(GL_VERTEX_ARRAY)
glDisable(GL_BLEND)
# Draw Axes
threeAxis(1.5)
#glClear(GL_COLOR_BUFFER_BIT)
# Draw Transparent Sun
glEnable(GL_BLEND)
#glBlendFunc (GL_SRC_ALPHA, GL_ONE)
#glBlendFunc(GL_ONE, GL_ONE_MINUS_DST_ALPHA)
#glBlendFunc(GL_SRC_ALPHA, GL_ONE_MINUS_DST_ALPHA)
glColor4f(0.0,0.0,1.0, 0.15)
glutSolidSphere(1.0,32,32)
glDisable(GL_BLEND)
#glPopMatrix()
glutSwapBuffers()
def printHelp():
print """\n\n
------------------------------------------------------------------------------\n
Left Mouse Button: - rotate viewing position\n
Middle Mouse Button: - translate the scene\n
Right Mouse Button: - zoom in and out of scene\n
Keys
p: - start or pause the program\n
q,Esc: - exit the program\n
------------------------------------------------------------------------------\n
\n"""
#-----
# MAIN
#-----
if __name__=="__main__":
printHelp()
window = glut_window()
(np_datax, np_datay, np_dataz, np_life, np_position, np_velocity, np_zmel, gl_position, gl_color) = initial_buffers(num_particles)
platform = cl.get_platforms()[0]
context = cl.Context(properties=[(cl.context_properties.PLATFORM, platform)] + get_gl_sharing_context_properties())
queue = cl.CommandQueue(context)
cl_life = cl.Buffer(context, mf.COPY_HOST_PTR, hostbuf=np_life)
cl_velocity = cl.Buffer(context, mf.COPY_HOST_PTR, hostbuf=np_velocity)
cl_zmel = cl.Buffer(context, mf.COPY_HOST_PTR, hostbuf=np_zmel)
cl_datax = cl.Buffer(context, mf.READ_ONLY | mf.COPY_HOST_PTR, hostbuf=np_datax)
cl_datay = cl.Buffer(context, mf.READ_ONLY | mf.COPY_HOST_PTR, hostbuf=np_datay)
cl_dataz = cl.Buffer(context, mf.READ_ONLY | mf.COPY_HOST_PTR, hostbuf=np_dataz)
cl_start_position = cl.Buffer(context, mf.READ_ONLY | mf.COPY_HOST_PTR, hostbuf=np_position)
cl_start_velocity = cl.Buffer(context, mf.READ_ONLY | mf.COPY_HOST_PTR, hostbuf=np_velocity)
if hasattr(gl_position,'buffers'):
cl_gl_position = cl.GLBuffer(context, mf.READ_WRITE, int(gl_position.buffers[0]))
cl_gl_color = cl.GLBuffer(context, mf.READ_WRITE, int(gl_color.buffers[0]))
elif hasattr(gl_position,'buffer'):
cl_gl_position = cl.GLBuffer(context, mf.READ_WRITE, int(gl_position.buffer))
cl_gl_color = cl.GLBuffer(context, mf.READ_WRITE, int(gl_color.buffer))
else:
print "Can not find a proper buffer object in pyopencl install. Exiting..."
sys.exit()
f = open("cl_funcs_heliosphere.cl",'r')
fstr = "".join(f.readlines())
program = cl.Program(context, fstr).build()
glutMainLoop()