From 63163ebbbced363fde788c560b479569470705bd Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 15 Jun 2019 21:39:42 +0200
Subject: Split descriptors and symbolic formulation

---
 lbm.py | 137 -----------------------------------------------------------------
 1 file changed, 137 deletions(-)
 delete mode 100644 lbm.py

(limited to 'lbm.py')

diff --git a/lbm.py b/lbm.py
deleted file mode 100644
index ef05e4f..0000000
--- a/lbm.py
+++ /dev/null
@@ -1,137 +0,0 @@
-import pyopencl as cl
-mf = cl.mem_flags
-
-import numpy
-import sympy
-
-from mako.template import Template
-from pathlib import Path
-
-class Geometry:
-    def __init__(self, size_x, size_y, size_z = 1):
-        self.size_x = size_x
-        self.size_y = size_y
-        self.size_z = size_z
-        self.volume = size_x * size_y * size_z
-
-    def inner_cells(self):
-        if self.size_z == 1:
-            for y in range(1,self.size_y-1):
-                for x in range(1,self.size_x-1):
-                    yield x, y
-        else:
-            for z in range(1,self.size_z-1):
-                for y in range(1,self.size_y-1):
-                    for x in range(1,self.size_x-1):
-                        yield x, y, z
-
-    def span(self):
-        if self.size_z == 1:
-            return (self.size_x, self.size_y)
-        else:
-            return (self.size_x, self.size_y, self.size_z)
-
-    def inner_span(self):
-        if self.size_z == 1:
-            return (self.size_x-2, self.size_y-2)
-        else:
-            return (self.size_x-2, self.size_y-2, self.size_z-2)
-
-
-class Lattice:
-    def __init__(self, descriptor, geometry, moments, collide, pop_eq_src = '', boundary_src = ''):
-        self.descriptor = descriptor
-        self.geometry   = geometry
-
-        self.moments = moments
-        self.collide = collide
-
-        self.pop_eq_src = pop_eq_src
-        self.boundary_src = boundary_src
-
-        self.platform = cl.get_platforms()[0]
-        self.context  = cl.Context(properties=[(cl.context_properties.PLATFORM, self.platform)])
-        self.queue = cl.CommandQueue(self.context)
-
-        self.np_material = numpy.ndarray(shape=(self.geometry.volume, 1), dtype=numpy.int32)
-
-        self.tick = True
-
-        self.pop_size     = descriptor.q     * self.geometry.volume * numpy.float32(0).nbytes
-        self.moments_size = (descriptor.d+1) * self.geometry.volume * numpy.float32(0).nbytes
-
-        self.cl_pop_a = cl.Buffer(self.context, mf.READ_WRITE, size=self.pop_size)
-        self.cl_pop_b = cl.Buffer(self.context, mf.READ_WRITE, size=self.pop_size)
-
-        self.cl_moments  = cl.Buffer(self.context, mf.WRITE_ONLY, size=self.moments_size)
-        self.cl_material = cl.Buffer(self.context, mf.READ_ONLY | mf.USE_HOST_PTR, hostbuf=self.np_material)
-
-        self.build_kernel()
-
-        if descriptor.d == 2:
-            self.layout = (32,1)
-        elif descriptor.d == 3:
-            self.layout = (32,1,1)
-
-        self.program.equilibrilize(
-            self.queue, self.geometry.span(), self.layout, self.cl_pop_a, self.cl_pop_b).wait()
-
-    def idx(self, x, y, z = 0):
-        return z * (self.geometry.size_x*self.geometry.size_y) + y * self.geometry.size_x + x;
-
-    def setup_geometry(self, material_at):
-        if self.descriptor.d == 2:
-            for x, y in self.geometry.inner_cells():
-                self.np_material[self.idx(x,y)] = material_at(self.geometry, x, y)
-        elif self.descriptor.d == 3:
-            for x, y, z in self.geometry.inner_cells():
-                self.np_material[self.idx(x,y,z)] = material_at(self.geometry, x, y, z)
-
-        cl.enqueue_copy(self.queue, self.cl_material, self.np_material).wait();
-
-    def build_kernel(self):
-        program_src = Template(filename = str(Path(__file__).parent/'template/kernel.mako')).render(
-            descriptor = self.descriptor,
-            geometry   = self.geometry,
-
-            moments_subexpr    = self.moments[0],
-            moments_assignment = self.moments[1],
-            collide_subexpr    = self.collide[0],
-            collide_assignment = self.collide[1],
-
-            pop_eq_src = Template(self.pop_eq_src).render(
-                descriptor = self.descriptor,
-                geometry   = self.geometry
-            ),
-            boundary_src = Template(self.boundary_src).render(
-                descriptor = self.descriptor,
-                geometry   = self.geometry
-            ),
-
-            ccode = sympy.ccode
-        )
-        self.program = cl.Program(self.context, program_src).build('-cl-single-precision-constant -cl-fast-relaxed-math')
-
-    def evolve(self):
-        if self.tick:
-            self.tick = False
-            self.program.collide_and_stream(
-                self.queue, self.geometry.span(), self.layout, self.cl_pop_a, self.cl_pop_b, self.cl_material)
-        else:
-            self.tick = True
-            self.program.collide_and_stream(
-                self.queue, self.geometry.span(), self.layout, self.cl_pop_b, self.cl_pop_a, self.cl_material)
-
-    def sync(self):
-        self.queue.finish()
-
-    def get_moments(self):
-        moments = numpy.ndarray(shape=(self.descriptor.d+1, self.geometry.volume), dtype=numpy.float32)
-        if self.tick:
-            self.program.collect_moments(
-                self.queue, self.geometry.span(), self.layout, self.cl_pop_b, self.cl_moments)
-        else:
-            self.program.collect_moments(
-                self.queue, self.geometry.span(), self.layout, self.cl_pop_a, self.cl_moments)
-        cl.enqueue_copy(self.queue, moments, self.cl_moments).wait();
-        return moments
-- 
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