From ba6012ad894c6c52d3a9a4f0f777c4b0788b00e4 Mon Sep 17 00:00:00 2001
From: Erik Onarheim <erik.onarheim@gmail.com>
Date: Mon, 18 Mar 2024 19:14:28 -0500
Subject: [PATCH] fix: TileMap culling did not work properly when using fixed
 updates lower than refresh rate

---
 CHANGELOG.md             | 1 +
 src/engine/Screen.ts     | 2 +-
 src/spec/ParallaxSpec.ts | 4 ++++
 3 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index e8b7dcc5d..ee88db719 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -40,6 +40,7 @@ This project adheres to [Semantic Versioning](http://semver.org/).
 
 ### Fixed
 
+- Fixed issue where `ex.TileMap` culling did not work properly when using fixed updates lower than refresh rate
 - Fixed incomplete types for font options in `ex.FontSource().toFont(options)`
 - Fixed issue with `ex.Loader` start button position when using CSS transforms
 - Fixed issue where adding scenes with the same name did not work when it was previously removed
diff --git a/src/engine/Screen.ts b/src/engine/Screen.ts
index 482981451..f31918ef2 100644
--- a/src/engine/Screen.ts
+++ b/src/engine/Screen.ts
@@ -758,7 +758,7 @@ export class Screen {
       Vector.Half)
       .scale(vec(1/this._camera.zoom, 1/this._camera.zoom))
       .rotate(this._camera.rotation)
-      .translate(this._camera.pos);
+      .translate(this._camera.drawPos);
     return bounds;
   }
 
diff --git a/src/spec/ParallaxSpec.ts b/src/spec/ParallaxSpec.ts
index 23340ae0e..f1f45c24a 100644
--- a/src/spec/ParallaxSpec.ts
+++ b/src/spec/ParallaxSpec.ts
@@ -25,6 +25,7 @@ describe('A Parallax Component', () => {
     const game = TestUtils.engine({width: 500, height: 500}, ['use-canvas-context']);
     await TestUtils.runToReady(game);
     game.currentScene.camera.pos = ex.vec(0, 0);
+    game.currentScene.camera.drawPos = ex.vec(0, 0);
 
     const clock = game.clock as ex.TestClock;
 
@@ -33,6 +34,7 @@ describe('A Parallax Component', () => {
     game.add(actor);
 
     game.currentScene.camera.pos = ex.vec(100, 100);
+    game.currentScene.camera.drawPos = ex.vec(100, 100);
     expect(game.currentScene.camera.pos).toBeVector(ex.vec(100, 100));
 
     clock.step(16);
@@ -40,12 +42,14 @@ describe('A Parallax Component', () => {
     expect(actor.hasTag('ex.offscreen')).toBeFalse();
 
     game.currentScene.camera.pos = ex.vec(520, 520);
+    game.currentScene.camera.drawPos = ex.vec(520, 520);
     clock.step();
     expect(game.currentScene.camera.pos).toBeVector(ex.vec(520, 520));
     await expectAsync(game.canvas).toEqualImage('src/spec/images/ParallaxSpec/parallax2.png');
     expect(actor.hasTag('ex.offscreen')).toBeFalse();
 
     game.currentScene.camera.pos = ex.vec(620, 620);
+    game.currentScene.camera.drawPos = ex.vec(620, 620);
     clock.step();
     expect(game.currentScene.camera.pos).toBeVector(ex.vec(620, 620));
     expect(actor.hasTag('ex.offscreen')).toBeTrue();