correct units of measurement in move() kernel

2 files changed, 4 insertions, 4 deletions

diff --git a/balls.c b/balls.c
index c66a362..dab8961 100644
--- a/balls.c
+++ b/balls.c
@@ -26,7 +26,7 @@
 
 #define RMIN 0.05 /* Minimum radius. */
 #define RMAX 0.10 /* Maximum radius. */
-#define VMAX_INIT 0.05 /* Maximum initial velocity. */
+#define VMAX_INIT 1.5 /* Maximum initial velocity. */
 
 enum {
 	WIDTH = 640,
diff --git a/balls.cl b/balls.cl
index 3ca7de7..47bd7aa 100644
--- a/balls.cl
+++ b/balls.cl
@@ -1,6 +1,6 @@
 #include "config.h"
 
-#define G (9.81f / FPS / FPS)
+#define G 9.81f
 #define DENSITY 1500.0f
 
 int isCollision(float2 p1, float r1, float2 p2, float r2);
@@ -17,8 +17,8 @@ move(__global float2 *positions, __global float2 *velocities) {
 	size_t id;
 
 	id = get_global_id(0);
-	velocities[id].y -= G;
-	positions[id] += velocities[id];
+	velocities[id].y -= G / FPS;
+	positions[id] += velocities[id] / FPS;
 }
 
 __kernel void