From 4e5a75074acd15587c305dd8ca8ff655031d38a6 Mon Sep 17 00:00:00 2001
From: Robin Townsend <robin@robin.town>
Date: Sun, 18 Jun 2023 00:58:54 -0400
Subject: [PATCH] Fix tiles not collapsing toward their center

---
 src/video-grid/model.ts       | 4 ++--
 test/video-grid/model-test.ts | 6 +++---
 2 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/src/video-grid/model.ts b/src/video-grid/model.ts
index 5150ace..15973c4 100644
--- a/src/video-grid/model.ts
+++ b/src/video-grid/model.ts
@@ -543,8 +543,8 @@ export function cycleTileSize(tileId: string, g: Grid): Grid {
   // To make the tile appear to expand outwards from its center, we're actually
   // scanning for locations to put the *center* of the tile. These numbers are
   // the offsets between the tile's origin and its center.
-  const scanColumnOffset = Math.floor((toWidth - 1) / 2);
-  const scanRowOffset = Math.floor((toHeight - 1) / 2);
+  const scanColumnOffset = Math.floor((toWidth - fromWidth) / 2);
+  const scanRowOffset = Math.floor((toHeight - fromHeight) / 2);
 
   const nextScanLocations = new Set<number>([from]);
   const rows = row(g.cells.length - 1, g) + 1;
diff --git a/test/video-grid/model-test.ts b/test/video-grid/model-test.ts
index f7d0330..479f9cb 100644
--- a/test/video-grid/model-test.ts
+++ b/test/video-grid/model-test.ts
@@ -273,9 +273,9 @@ dbbe
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 jk`,
   `
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+akbc
+djhe
+fig`
 );
 
 testCycleTileSize(