From 3039593b72a9b64597276ef75b089ea7033bc3c0 Mon Sep 17 00:00:00 2001
From: cursed22bc <admin@pixeldawn.org>
Date: Fri, 20 Feb 2026 15:23:20 +0200
Subject: smooth pixel perfect camera example

---
 smoothCamera.glsl | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)
 create mode 100644 smoothCamera.glsl

(limited to 'smoothCamera.glsl')

diff --git a/smoothCamera.glsl b/smoothCamera.glsl
new file mode 100644
index 0000000..074c52c
--- /dev/null
+++ b/smoothCamera.glsl
@@ -0,0 +1,17 @@
+//[[
+//
+//  applies sub-pixel offset to the viewport texture for smooth camera movement
+//  while keeping pixel-perfect rendering. 
+//  - game is rendered with camera snapped to integer pixels (pixel-perfect)
+//  - this shader samples the texture with a UV offset = (smooth_pos - snapped_pos)
+//  - the offset creates the illusion of smooth camera movement
+//
+//  offset: (subPixelX, subPixelY) in UV space (0-1 range)
+//  texture must have 1px padding on each side to avoid black bars when sampling.
+//]]
+
+extern vec2 offset;
+
+vec4 effect(vec4 color, Image tex, vec2 texture_coords, vec2 screen_coords) {
+    return Texel(tex, texture_coords + offset);
+}
-- 
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