def gravity_cluster():
if not test_pyopencl():
print("")
print("Attention !!! ")
print(
" This demo works only with PyOpenCL: \n http://mathema.tician.de/software/pyopencl \n http://www.khronos.org/opencl/ \n "
)
print(" Please install the package: python-pyopencl for continuing")
print("")
return
G = 0.000001
steps = 100000000
n = 3000
dt = 0.04
pset = ps.ParticlesSet(n, dtype=np.float32)
cs = clu.RandGalaxyCluster()
print("Building initial galaxy .... ")
cs.insert3(pset.X, M=pset.M, V=pset.V, G=G)
try:
occx = occ.OpenCLcontext(
pset.size, pset.dim,
(occ.OCLC_X | occ.OCLC_V | occ.OCLC_A | occ.OCLC_M))
except:
print("")
print("ERROR !!! ")
print(" Please verify your opencl installation ")
print(" Probably you must install your GPU OpenCL drivers")
print("")
return
grav = gr.GravityOCL(pset.size, Consts=G, ocl_context=occx)
grav.set_masses(pset.M)
grav.update_force(pset)
solver = els.EulerSolverOCL(grav, pset, dt, ocl_context=occx)
a = aogl.AnimatedGl()
a.draw_particles.set_draw_model(a.draw_particles.DRAW_MODEL_VECTOR)
a.ode_solver = solver
a.pset = pset
a.steps = steps
a.build_animation()
a.start()
return
def gravity_cluster():
if not test_pyopencl() :
print("")
print("Attention !!! ")
print(" This demo works only with PyOpenCL: \n http://mathema.tician.de/software/pyopencl \n http://www.khronos.org/opencl/ \n ")
print(" Please install the package: python-pyopencl for continuing")
print("")
return
G = 0.000001
steps = 100000000
n = 3000
dt = 0.04
pset = ps.ParticlesSet( n , dtype=np.float32 )
cs = clu.RandGalaxyCluster()
print("Building initial galaxy .... ")
cs.insert3( pset.X, M=pset.M, V=pset.V , G=G )
try :
occx = occ.OpenCLcontext( pset.size , pset.dim , (occ.OCLC_X|occ.OCLC_V|occ.OCLC_A|occ.OCLC_M) )
except :
print("")
print("ERROR !!! ")
print(" Please verify your opencl installation ")
print(" Probably you must install your GPU OpenCL drivers")
print("")
return
grav = gr.GravityOCL( pset.size , Consts=G , ocl_context=occx )
grav.set_masses( pset.M )
grav.update_force( pset )
solver = els.EulerSolverOCL( grav , pset , dt , ocl_context=occx )
a = aogl.AnimatedGl()
a.draw_particles.set_draw_model( a.draw_particles.DRAW_MODEL_VECTOR )
a.ode_solver = solver
a.pset = pset
a.steps = steps
a.build_animation()
a.start()
return
def fountain():
"""
Fountain demo
"""
steps = 10000000
dt = 0.005
pcnt = 100000
fl = True
if test_pyopencl():
print("OpenCL is installed and enabled ")
print(" Try, at least, 200000 particles ")
while fl:
try:
print(" ")
pcnt = int(raw_input('How many particles: '))
except:
print("Please insert a number! ")
else:
fl = False
pset = ps.ParticlesSet(pcnt, dtype=np.float32)
pset.M[:] = 0.1
pset.X[:, 2] = 0.7 * np.random.rand(pset.size)
grav = cf.ConstForce(pset.size, dim=pset.dim, u_force=(0.0, 0.0, -10.0))
occx = None
if test_pyopencl():
occx = occ.OpenCLcontext(
pset.size, pset.dim,
(occ.OCLC_X | occ.OCLC_V | occ.OCLC_A | occ.OCLC_M))
drag = dr.DragOCL(pset.size,
dim=pset.dim,
Consts=0.01,
ocl_context=occx)
else:
drag = dr.Drag(pset.size, dim=pset.dim, Consts=0.01)
multi = mf.MultipleForce(pset.size, dim=pset.dim)
multi.append_force(grav)
multi.append_force(drag)
multi.set_masses(pset.M)
#solver = mds.MidpointSolver( multi , pset , dt )
if test_pyopencl():
solver = els.EulerSolverOCL(multi, pset, dt, ocl_context=occx)
else:
solver = els.EulerSolver(multi, pset, dt)
solver.update_force()
default_pos.sim_time = solver.get_sim_time()
bd = (-100.0, 100.0, -100.0, 100.0, 0.0, 100.0)
bound = db.DefaultBoundary(bd, dim=3, defualt_pos=default_pos)
pset.set_boundary(bound)
a = aogl.AnimatedGl()
a.ode_solver = solver
a.pset = pset
a.steps = steps
a.draw_particles.set_draw_model(a.draw_particles.DRAW_MODEL_VECTOR)
a.init_rotation(-80, [0.7, 0.05, 0])
a.build_animation()
a.start()
return
def fountain():
"""
Fountain demo
"""
steps = 10000000
dt = 0.005
pcnt = 100000
fl = True
if test_pyopencl() :
print( "OpenCL is installed and enabled " )
print( " Try, at least, 200000 particles " )
while fl :
try :
print( " " )
pcnt = int( raw_input('How many particles: ') )
except :
print( "Please insert a number! " )
else :
fl = False
pset = ps.ParticlesSet( pcnt , dtype=np.float32 )
pset.M[:] = 0.1
pset.X[:,2] = 0.7 * np.random.rand( pset.size )
grav = cf.ConstForce( pset.size , dim=pset.dim , u_force=( 0.0 , 0.0 , -10.0 ) )
occx = None
if test_pyopencl() :
occx = occ.OpenCLcontext( pset.size , pset.dim , ( occ.OCLC_X | occ.OCLC_V | occ.OCLC_A | occ.OCLC_M ) )
drag = dr.DragOCL( pset.size , dim=pset.dim , Consts=0.01 , ocl_context=occx )
else :
drag = dr.Drag( pset.size , dim=pset.dim , Consts=0.01 )
multi = mf.MultipleForce( pset.size , dim=pset.dim )
multi.append_force( grav )
multi.append_force( drag )
multi.set_masses( pset.M )
#solver = mds.MidpointSolver( multi , pset , dt )
if test_pyopencl() :
solver = els.EulerSolverOCL( multi , pset , dt , ocl_context=occx )
else :
solver = els.EulerSolver( multi , pset , dt )
solver.update_force()
default_pos.sim_time = solver.get_sim_time()
bd = ( -100.0 , 100.0 , -100.0 , 100.0 , 0.0 , 100.0 )
bound = db.DefaultBoundary( bd , dim=3 , defualt_pos=default_pos )
pset.set_boundary( bound )
a = aogl.AnimatedGl()
a.ode_solver = solver
a.pset = pset
a.steps = steps
a.draw_particles.set_draw_model( a.draw_particles.DRAW_MODEL_VECTOR )
a.init_rotation( -80 , [ 0.7 , 0.05 , 0 ] )
a.build_animation()
a.start()
return
def bubble():
"""
Pseudo bubble simulation
"""
ocl_ok = test_pyopencl()
if ocl_ok :
pcnt = 9000
r_min=0.5
occx = occ.OpenCLcontext( pcnt , 3 )
else :
pcnt = 700
r_min = 1.5
steps = 1000000
dt = 0.01
rand_c = rc.RandCluster()
pset = ps.ParticlesSet( pcnt , dtype=np.float32 )
rand_c.insert3( X=pset.X ,
M=pset.M ,
start_indx=0 ,
n=pset.size ,
radius=3.0 ,
mass_rng=(0.5,0.8) ,
r_min=0.0 )
if ocl_ok :
bubble = pb.PseudoBubbleOCL( pset.size , pset.dim , Consts=(r_min,10) )
drag = dr.DragOCL( pset.size , pset.dim , Consts=0.01 )
else :
bubble = pb.PseudoBubble( pset.size , pset.dim , Consts=(r_min,10) )
drag = dr.Drag( pset.size , pset.dim , Consts=0.01 )
constf = cf.ConstForce( pset.size , dim=pset.dim , u_force=[ 0 , 0 , -10.0 ] )
multif = mf.MultipleForce( pset.size , pset.dim )
multif.append_force( bubble )
multif.append_force( constf )
multif.append_force( drag )
multif.set_masses( pset.M )
#solver = els.EulerSolver( multif , pset , dt )
#solver = lps.LeapfrogSolver( multif , pset , dt )
solver = svs.StormerVerletSolver( multif , pset , dt )
#solver = rks.RungeKuttaSolver( lennard_jones , pset , dt )
#solver = mds.MidpointSolver( lennard_jones , pset , dt )
bound = rb.ReboundBoundary( bound=(-5.0,5.0) )
pset.set_boundary( bound )
a = aogl.AnimatedGl()
a.ode_solver = solver
a.pset = pset
a.steps = steps
if ocl_ok :
a.draw_particles.set_draw_model( a.draw_particles.DRAW_MODEL_VECTOR )
a.init_rotation( -80 , [ 0.7 , 0.05 , 0 ] )
a.build_animation()
a.start()
return
def cube_water():
"""
Smoothed particle hydrodynamics cube of water exemple
"""
steps = 10000000 # Number of steps
dt = 0.005 # dt should be defined according to a numerical stability parameter, a simple one will be dt<2h/vmax
dx = 0.1 # spacing between particles L/Nx
# dx = 0.025 # spacing between particles L/Nx
aux = (int(1.0/dx)-1)
pcntVol = aux*aux*(aux+1) # Number of particles in volume
pcntWall= (aux+2)*(aux+2) # Number of particles in the bottom
pcntWall= pcntWall+(aux+1)*(aux+1)*4 # Number of particles in wallls
pcnt = pcntVol+pcntWall
L = 1.0 # Water cube size
g = -9.8 # Gravity acceleration
h_local = .15
ar = np.arange(0, 1+dx, dx)
fl = True
if test_pyopencl() :
print( "OpenCL is installed and enabled " )
print( " Try, at least, 200000 particles " )
while fl :
try :
print( " " )
pcnt = int( raw_input('How many particles: ') )
except :
print( "Please insert a number! " )
else :
fl = False
pset = ps.ParticlesSet (size = np.int64(pcnt), mass = True, density = True, dtype = np.float64)
pset.add_property_by_name (property_name = "pressure", to_type = np.float64)
costrs = boundaryParticles (pset=pset, pcnt=np.int(pcnt), pcntVol=np.int(pcntVol), pcntWall=np.int(pcntWall), ar=ar, L=L)
initial_pos (pset=pset, pcnt=np.int(pcnt), pcntVol=np.int(pcntVol), pcntWall=np.int(pcntWall), ar=ar, L=L)
initial_vel (pset=pset, pcnt=np.int(pcnt) )
initial_pressure (pset=pset, pcnt=np.int(pcnt), L=L)
nstk = ns.HPSNavierStokes (pset=pset )
nstk.calc_density_water_rest(pset=pset, H=L)
nstk.calc_pressure (pset=pset, H=L)
pset.M[:] = 1000.0*L*L*L / pcntVol
fi = cfi.ConstrainedForceInteractions(pset)
sk = ns.HPSSmothingKernels(pset=pset)
sk.h = h_local # RCM, for tests
h = sk.h
point1 = np.array([0.0, 0.0, 0.0], dtype=np.float64)
point2 = np.array([L, L, L ], dtype=np.float64)
mesh = msh.Mesh (pset=pset, h = h, corner1 = point1, corner2 = point2)
mesh.calc_mesh ()
mesh.calc_particles_mesh_locations (pset=pset, dtype=np.float64)
f_conn = mesh.calc_particles_that_interact (pset=pset)
fi.add_connections (fc=f_conn)
sk.calc_smothing_kernels (pset=pset)
grav = cf.ConstForce( pset.size , dim=pset.dim , u_force=( 0.0 , 0.0 , g ) )
occx = None
if test_pyopencl() :
occx = occ.OpenCLcontext( pset.size , pset.dim , ( occ.OCLC_X | occ.OCLC_V | occ.OCLC_A | occ.OCLC_M ) )
drag = dr.DragOCL( pset.size , dim=pset.dim , Consts=0.01 , ocl_context=occx )
else :
drag = dr.Drag( pset.size , dim=pset.dim , Consts=0.01 )
multi = mf.MultipleForce( pset.size , dim=pset.dim )
multi.append_force( grav )
multi.append_force( drag )
multi.set_masses( pset.M )
#solver = mds.MidpointSolver( multi , pset , dt )
if test_pyopencl() :
solver = els.EulerSolverOCL( multi , pset , dt , ocl_context=occx )
else :
solver = els.EulerSolverConstrained( multi , pset , dt , costrs )
# code.interact(local=locals()) # RCM lixo
# pdb.pm() # RCM lixo
solver.update_force()
default_pos.sim_time = solver.get_sim_time()
# bd = ( -100.0 , 100.0 , -100.0 , 100.0 , 0.0 , 100.0 )
bd = ( -1.0 , 1.0 , -1.0 , 1.0 , 0.0 , 2.0 ) # RCM
bound = db.DefaultBoundary( bd , dim=3 , defualt_pos=default_pos )
pset.set_boundary( bound )
a = aogl.AnimatedGl()
a.ode_solver = solver
a.pset = pset
a.steps = steps
a.draw_particles.set_draw_model( a.draw_particles.DRAW_MODEL_VECTOR )
a.init_rotation( -80 , [ 0.7 , 0.05 , 0 ] )
a.build_animation()
a.start()
return
def bubble():
"""
Pseudo bubble simulation
"""
ocl_ok = test_pyopencl()
if ocl_ok:
pcnt = 9000
r_min = 0.5
occx = occ.OpenCLcontext(pcnt, 3)
else:
pcnt = 700
r_min = 1.5
steps = 1000000
dt = 0.01
rand_c = rc.RandCluster()
pset = ps.ParticlesSet(pcnt, dtype=np.float32)
rand_c.insert3(X=pset.X,
M=pset.M,
start_indx=0,
n=pset.size,
radius=3.0,
mass_rng=(0.5, 0.8),
r_min=0.0)
if ocl_ok:
bubble = pb.PseudoBubbleOCL(pset.size, pset.dim, Consts=(r_min, 10))
drag = dr.DragOCL(pset.size, pset.dim, Consts=0.01)
else:
bubble = pb.PseudoBubble(pset.size, pset.dim, Consts=(r_min, 10))
drag = dr.Drag(pset.size, pset.dim, Consts=0.01)
constf = cf.ConstForce(pset.size, dim=pset.dim, u_force=[0, 0, -10.0])
multif = mf.MultipleForce(pset.size, pset.dim)
multif.append_force(bubble)
multif.append_force(constf)
multif.append_force(drag)
multif.set_masses(pset.M)
#solver = els.EulerSolver( multif , pset , dt )
#solver = lps.LeapfrogSolver( multif , pset , dt )
solver = svs.StormerVerletSolver(multif, pset, dt)
#solver = rks.RungeKuttaSolver( lennard_jones , pset , dt )
#solver = mds.MidpointSolver( lennard_jones , pset , dt )
bound = rb.ReboundBoundary(bound=(-5.0, 5.0))
pset.set_boundary(bound)
a = aogl.AnimatedGl()
a.ode_solver = solver
a.pset = pset
a.steps = steps
if ocl_ok:
a.draw_particles.set_draw_model(a.draw_particles.DRAW_MODEL_VECTOR)
a.init_rotation(-80, [0.7, 0.05, 0])
a.build_animation()
a.start()
return