From 12e8d10df34e8def9a5fb3944bff6de25f020d27 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Tue, 29 Oct 2019 16:06:09 +0100
Subject: Fix double precision

---
 ldc_2d.py     |  6 ++++--
 shell.nix     | 15 +++++++++------
 simulation.py | 15 +++++++--------
 3 files changed, 20 insertions(+), 16 deletions(-)

diff --git a/ldc_2d.py b/ldc_2d.py
index 14e8a5c..1e41233 100644
--- a/ldc_2d.py
+++ b/ldc_2d.py
@@ -42,7 +42,9 @@ generator = Generator(
 functions = ['collide_and_stream', 'equilibrilize', 'collect_moments', 'momenta_boundary']
 extras    = ['cell_list_dispatch']
 
-kernel_src = generator.kernel('cl', 'single', 'SOA', geometry, functions, extras) + Template("""
+precision = 'single'
+
+kernel_src = generator.kernel('cl', precision, 'SOA', 'ZYX', geometry, functions, extras) + Template("""
 __kernel void equilibrilize(__global $float_type* f_next,
                             __global $float_type* f_prev)
 {
@@ -60,7 +62,7 @@ __kernel void collect_moments(__global $float_type* f,
 
 print("Initializing simulation...\n")
 
-lattice = Lattice(geometry, kernel_src)
+lattice = Lattice(geometry, kernel_src, D2Q9, precision = precision)
 gid = lattice.memory.gid
 
 bulk_cells = CellList(lattice.context, lattice.queue, lattice.float_type,
diff --git a/shell.nix b/shell.nix
index 99d794b..616e55f 100644
--- a/shell.nix
+++ b/shell.nix
@@ -9,18 +9,21 @@ pkgs.stdenvNoCC.mkDerivation rec {
       pname = "boltzgen";
       version = "0.1";
 
-      src = pkgs.fetchFromGitHub {
-        owner  = "KnairdA";
-        repo   = "boltzgen";
-        rev    = "v0.1";
-        sha256 = "072kx4jrzd0g9rn63hjb0yic7qhbga47lp2vbz7rq3gvkqv1hz4d";
-      };
+      #src = pkgs.fetchFromGitHub {
+        #owner  = "KnairdA";
+        #repo   = "boltzgen";
+        #rev    = "v0.1";
+        #sha256 = "072kx4jrzd0g9rn63hjb0yic7qhbga47lp2vbz7rq3gvkqv1hz4d";
+      #};
+      src = ~/projects/dev/boltzgen;
 
       propagatedBuildInputs = with pkgs.python37Packages; [
         sympy
         numpy
         Mako
       ];
+
+      doCheck = false;
     };
 
     local-python = pkgs.python3.withPackages (python-packages: with python-packages; [
diff --git a/simulation.py b/simulation.py
index d2f24c9..e0ce3ba 100644
--- a/simulation.py
+++ b/simulation.py
@@ -4,17 +4,16 @@ mf = cl.mem_flags
 import numpy
 
 class Memory:
-    def __init__(self, grid, context, float_type):
+    def __init__(self, descriptor, geometry, context, float_type):
         self.context    = context
         self.float_type = float_type
 
-        self.size_x = grid.size_x
-        self.size_y = grid.size_y
-        self.size_z = grid.size_z
-
+        self.size_x = geometry.size_x
+        self.size_y = geometry.size_y
+        self.size_z = geometry.size_z
         self.volume = self.size_x * self.size_y * self.size_z
 
-        self.pop_size     = 9 * self.volume * self.float_type(0).nbytes
+        self.pop_size     = descriptor.q * self.volume * self.float_type(0).nbytes
         self.moments_size = 3 * self.volume * self.float_type(0).nbytes
 
         self.cl_pop_a = cl.Buffer(self.context, mf.READ_WRITE, size=self.pop_size)
@@ -40,7 +39,7 @@ class CellList:
         return (len(self.np_cells), 1, 1)
 
 class Lattice:
-    def __init__(self, geometry, kernel_src, platform = 0, precision = 'single'):
+    def __init__(self, geometry, kernel_src, descriptor, platform = 0, precision = 'single'):
         self.geometry = geometry
 
         self.float_type = {
@@ -56,7 +55,7 @@ class Lattice:
 
         self.queue = cl.CommandQueue(self.context)
 
-        self.memory = Memory(self.geometry, self.context, self.float_type[0])
+        self.memory = Memory(descriptor, self.geometry, self.context, self.float_type[0])
         self.tick = False
 
         self.compiler_args = {
-- 
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