FIXME

1 files changed, 8 insertions, 0 deletions

diff --git a/dda.c b/dda.c
index 20cdc6e..3cc544a 100644
--- a/dda.c
+++ b/dda.c
@@ -137,6 +137,14 @@ edge_init (edge_t *edge, fixed_t x0, fixed_t y0, fixed_t x1, fixed_t y1)
     edge->delta_e_small_y = SMALL_STEP_Y * dx;
 }
 
+/* FIXME:
+ *
+ * When updating the xi, we are stepping one sample at a time, but we
+ * can do better because we know how the minimum damage that is done on every Y
+ * step. This means we know we have to undo at least that much damage, so
+ * we can step much more than one sample if the edge is close to horizontal.
+ */
+
 static void
 edge_step (edge_t *edge, test_data_t *testdata, int i, int *yi)
 {