Get rid of dxdy in some places

1 files changed, 2 insertions, 2 deletions

diff --git a/dda.c b/dda.c
index 2ef1209..0642a20 100644
--- a/dda.c
+++ b/dda.c
@@ -89,9 +89,9 @@ dda (test_data_t *testdata)
 	    exit (-1);
 	}
 
-	e -= sample_step_y (y) * dxdy * dy;
+	e -= sample_step_y (y) * dx;
 
-	if (dxdy >= 0)
+	if (dx >= 0)
 	{
 	    while (e <= 0)
 	    {