From 6f6673ea1f6794a588b63fb723df668edeb830c1 Mon Sep 17 00:00:00 2001
From: numzero <numzer0@yandex.ru>
Date: Sun, 29 Dec 2024 21:30:10 +0300
Subject: [PATCH] Fix upside-down image

---
 src/bin/minitracer/present.wgsl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/bin/minitracer/present.wgsl b/src/bin/minitracer/present.wgsl
index 5fc83e9..58bbd48 100644
--- a/src/bin/minitracer/present.wgsl
+++ b/src/bin/minitracer/present.wgsl
@@ -12,7 +12,9 @@ struct Varying {
 
 @vertex
 fn on_vertex(in: Vertex) -> Varying {
-	return Varying(in.screen, vec4(2.0 * in.screen - 1.0, 0.0, 1.0));
+	let uv = in.screen;
+	let xy = vec2(2. * uv.x - 1., 1. - 2. * uv.y);
+	return Varying(uv, vec4(xy, 0., 1.));
 }
 
 @fragment