From 05a45cd09edb5a1f8db63792049a459e7a8d88b2 Mon Sep 17 00:00:00 2001
From: Andre Weissflog <floooh@gmail.com>
Date: Mon, 6 May 2024 19:02:06 +0200
Subject: [PATCH] fix a precision problem in sbuftex-sapp.glsl

---
 sapp/sbuftex-sapp.glsl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/sapp/sbuftex-sapp.glsl b/sapp/sbuftex-sapp.glsl
index f413b571..615c8721 100644
--- a/sapp/sbuftex-sapp.glsl
+++ b/sapp/sbuftex-sapp.glsl
@@ -19,7 +19,9 @@ out vec3 uv_idx;
 
 void main() {
     gl_Position = mvp * vec4(vtx[gl_VertexIndex].pos, 1.0);
-    uv_idx = vec3(vtx[gl_VertexIndex].uv, float(vtx[gl_VertexIndex].idx));
+    // need to add a bit of wiggle room here to prevent a precision problem on NVIDIA
+    // down in the pixel shader
+    uv_idx = vec3(vtx[gl_VertexIndex].uv, float(vtx[gl_VertexIndex].idx) + 0.5);
 }
 @end