1 files changed, 78 insertions, 0 deletions
diff --git a/D2Q9.py b/D2Q9.py
new file mode 100644
index 0000000..173f1b7
--- /dev/null
+++ b/D2Q9.py
@@ -0,0 +1,78 @@
+import pyopencl as cl
+mf = cl.mem_flags
+
+import numpy
+
+import sympy
+import symbolic.D2Q9 as D2Q9
+
+from mako.template import Template
+
+class Lattice:
+    def idx(self, x, y):
+        return y * self.nX + x;
+
+    def __init__(self, nX, nY, tau, geometry):
+        self.nX = nX
+        self.nY = nY
+        self.nCells = nX * nY
+        self.tau = tau
+        self.tick = True
+
+        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.nCells, 1), dtype=numpy.int32)
+        self.setup_geometry(geometry)
+
+        self.cl_pop_a = cl.Buffer(self.context, mf.READ_WRITE, size=9*self.nCells*numpy.float32(0).nbytes)
+        self.cl_pop_b = cl.Buffer(self.context, mf.READ_WRITE, size=9*self.nCells*numpy.float32(0).nbytes)
+
+        self.cl_moments  = cl.Buffer(self.context, mf.WRITE_ONLY, size=3*self.nCells*numpy.float32(0).nbytes)
+        self.cl_material = cl.Buffer(self.context, mf.READ_ONLY | mf.USE_HOST_PTR, hostbuf=self.np_material)
+
+        self.build_kernel()
+
+        self.program.equilibrilize(self.queue, (self.nX,self.nY), (32,1), self.cl_pop_a, self.cl_pop_b).wait()
+
+    def setup_geometry(self, geometry):
+        for y in range(1,self.nY-1):
+            for x in range(1,self.nX-1):
+                self.np_material[self.idx(x,y)] = geometry(self.nX,self.nY,x,y)
+
+    def build_kernel(self):
+        program_src = Template(filename = './template/kernel.mako').render(
+            nX     = self.nX,
+            nY     = self.nY,
+            nCells = self.nCells,
+            tau    = self.tau,
+            moments_helper     = D2Q9.moments_opt[0],
+            moments_assignment = D2Q9.moments_opt[1],
+            collide_helper     = D2Q9.collide_opt[0],
+            collide_assignment = D2Q9.collide_opt[1],
+            c     = D2Q9.c,
+            w     = D2Q9.w,
+            ccode = sympy.ccode
+        )
+        self.program = cl.Program(self.context, program_src).build()
+
+    def evolve(self):
+        if self.tick:
+            self.tick = False
+            self.program.collide_and_stream(self.queue, (self.nX,self.nY), (32,1), self.cl_pop_a, self.cl_pop_b, self.cl_material)
+        else:
+            self.tick = True
+            self.program.collide_and_stream(self.queue, (self.nX,self.nY), (32,1), 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=(3, self.nCells), dtype=numpy.float32)
+        if self.tick:
+            self.program.collect_moments(self.queue, (self.nX,self.nY), (32,1), self.cl_pop_b, self.cl_moments)
+        else:
+            self.program.collect_moments(self.queue, (self.nX,self.nY), (32,1), self.cl_pop_a, self.cl_moments)
+        cl.enqueue_copy(self.queue, moments, self.cl_moments).wait();
+        return moments