From 9909e44f2328d6db74826684b96e5787b2cdd762 Mon Sep 17 00:00:00 2001
From: Sebastian <s3bk@protonmail.com>
Date: Sun, 24 Oct 2021 22:58:11 +0300
Subject: [PATCH] fix #428

This avoids an edgecase where presumably some floating point rounding error results in predicting a `to_tile_coords` that isn't actually stepped on, causing the loop to loop forever.
---
 renderer/src/tiler.rs | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/renderer/src/tiler.rs b/renderer/src/tiler.rs
index 32a1fc4c..2b4c541d 100644
--- a/renderer/src/tiler.rs
+++ b/renderer/src/tiler.rs
@@ -287,10 +287,16 @@ fn process_line_segment(line_segment: LineSegment2F,
         match next_step_direction {
             None => break,
             Some(StepDirection::X) => {
+                if tile_coords.x() == to_tile_coords.x() {
+                    break;
+                }
                 t_max += vec2f(t_delta.x(), 0.0);
                 tile_coords += vec2i(step.x(), 0);
             }
             Some(StepDirection::Y) => {
+                if tile_coords.y() == to_tile_coords.y() {
+                    break;
+                }
                 t_max += vec2f(0.0, t_delta.y());
                 tile_coords += vec2i(0, step.y());
             }