From c543a20179d495cb6d585c48637c24b248c29a07 Mon Sep 17 00:00:00 2001
From: Adrian Kummerlaender
Date: Sat, 15 Jun 2019 14:18:32 +0200
Subject: Consistently name population buffers

---
 implosion.py         | 10 +++++-----
 template/kernel.mako | 24 ++++++++++++------------
 2 files changed, 17 insertions(+), 17 deletions(-)

diff --git a/implosion.py b/implosion.py
index 514af46..90b1d55 100644
--- a/implosion.py
+++ b/implosion.py
@@ -4,8 +4,8 @@ import time
 import matplotlib
 import matplotlib.pyplot as plt
 matplotlib.use('AGG')
-from lbm import Lattice, Geometry
 
+from lbm import Lattice, Geometry
 
 import symbolic.D2Q9 as D2Q9
 
@@ -34,13 +34,13 @@ pop_eq = """
     if ( sqrt(pow(get_global_id(0) - ${geometry.size_x//2}.f, 2.f)
             + pow(get_global_id(1) - ${geometry.size_y//2}.f, 2.f)) < ${geometry.size_x//10} ) {
 % for i, w_i in enumerate(descriptor.w):
-        preshifted_f_a[${i*geometry.volume}] = 1./24.f;
-        preshifted_f_b[${i*geometry.volume}] = 1./24.f;
+        preshifted_f_next[${i*geometry.volume}] = 1./24.f;
+        preshifted_f_prev[${i*geometry.volume}] = 1./24.f;
 % endfor
     } else {
 % for i, w_i in enumerate(descriptor.w):
-        preshifted_f_a[${i*geometry.volume}] = ${w_i}.f;
-        preshifted_f_b[${i*geometry.volume}] = ${w_i}.f;
+        preshifted_f_next[${i*geometry.volume}] = ${w_i}.f;
+        preshifted_f_prev[${i*geometry.volume}] = ${w_i}.f;
 % endfor
 }"""
 
diff --git a/template/kernel.mako b/template/kernel.mako
index f3de3da..7e930af 100644
--- a/template/kernel.mako
+++ b/template/kernel.mako
@@ -1,15 +1,15 @@
-__kernel void equilibrilize(__global __write_only float* f_a,
-                            __global __write_only float* f_b)
+__kernel void equilibrilize(__global __write_only float* f_next,
+                            __global __write_only float* f_prev)
 {
     const unsigned int gid = get_global_id(1)*${geometry.size_x} + get_global_id(0);
 
-    __global __write_only float* preshifted_f_a = f_a + gid;
-    __global __write_only float* preshifted_f_b = f_b + gid;
+    __global __write_only float* preshifted_f_next = f_next + gid;
+    __global __write_only float* preshifted_f_prev = f_prev + gid;
 
 % if pop_eq_src == '':
 %     for i, w_i in enumerate(descriptor.w):
-    preshifted_f_a[${i*geometry.volume}] = ${w_i}.f;
-    preshifted_f_b[${i*geometry.volume}] = ${w_i}.f;
+    preshifted_f_next[${i*geometry.volume}] = ${w_i}.f;
+    preshifted_f_prev[${i*geometry.volume}] = ${w_i}.f;
 %     endfor
 % else:
     ${pop_eq_src}
@@ -27,8 +27,8 @@ def neighbor_offset(c_i):
         return c_i[1]*geometry.size_x + c_i[0]
 %>
 
-__kernel void collide_and_stream(__global __write_only float* f_a,
-                                 __global __read_only  float* f_b,
+__kernel void collide_and_stream(__global __write_only float* f_next,
+                                 __global __read_only  float* f_prev,
                                  __global __read_only  int* material)
 {
     const unsigned int gid = get_global_id(1)*${geometry.size_x} + get_global_id(0);
@@ -39,11 +39,11 @@ __kernel void collide_and_stream(__global __write_only float* f_a,
         return;
     }
 
-    __global __write_only float* preshifted_f_a = f_a + gid;
-    __global __read_only  float* preshifted_f_b = f_b + gid;
+    __global __write_only float* preshifted_f_next = f_next + gid;
+    __global __read_only  float* preshifted_f_prev = f_prev + gid;
 
 % for i, c_i in enumerate(descriptor.c):
-    const float f_curr_${i} = preshifted_f_b[${direction_index(c_i)*geometry.volume + neighbor_offset(-c_i)}];
+    const float f_curr_${i} = preshifted_f_prev[${direction_index(c_i)*geometry.volume + neighbor_offset(-c_i)}];
 % endfor
 
 % for i, expr in enumerate(moments_subexpr):
@@ -65,7 +65,7 @@ __kernel void collide_and_stream(__global __write_only float* f_a,
 % endfor
 
 % for i in range(0,descriptor.q):
-    preshifted_f_a[${i*geometry.volume}] = f_next_${i};
+    preshifted_f_next[${i*geometry.volume}] = f_next_${i};
 % endfor
 }
 
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