Rename y to yi

1 files changed, 6 insertions, 6 deletions

diff --git a/dda.c b/dda.c
index 0642a20..1b0cfa5 100644
--- a/dda.c
+++ b/dda.c
@@ -71,8 +71,8 @@ dda (test_data_t *testdata)
     double dx = (x1 - x0);
     double dy = (y1 - y0);
     double dxdy = dx / dy;
-    double y = next_sample_y (y0);
-    double x = (y - y0) * dxdy + x0;
+    double yi = next_sample_y (y0);
+    double x = (yi - y0) * dxdy + x0;
     double xi = next_sample_x (x);
     double e = (xi - x) * dy;
 
@@ -80,16 +80,16 @@ dda (test_data_t *testdata)
     printf ("= = = = %f %f %f %f = = = = \n", x0, y0, x1, y1);
 #endif
 
-    while (y < next_sample_y (y1))
+    while (yi < next_sample_y (y1))
     {
 	if (testdata->points[i++] != xi		||
-	    testdata->points[i++] != y)
+	    testdata->points[i++] != yi)
 	{
 	    printf ("error %f %f %f\n", x, testdata->points[i - 1], xi);
 	    exit (-1);
 	}
 
-	e -= sample_step_y (y) * dx;
+	e -= sample_step_y (yi) * dx;
 
 	if (dx >= 0)
 	{
@@ -114,7 +114,7 @@ dda (test_data_t *testdata)
 	    }
 	}
 
-	y += sample_step_y (y);
+	yi += sample_step_y (yi);
     }
 }