From da755e4ec23961bd8314ef60600c2ede427494aa Mon Sep 17 00:00:00 2001
From: "A.Olokhtonov" <a.olokhtonov@norsi-trans.ru>
Date: Sun, 24 Nov 2024 19:33:32 +0300
Subject: [PATCH] Fix first stroke not drawing because it has Z=0

---
 README.txt              | 2 +-
 client/webgl_shaders.js | 4 +---
 2 files changed, 2 insertions(+), 4 deletions(-)

diff --git a/README.txt b/README.txt
index 6191c85..4a5133e 100644
--- a/README.txt
+++ b/README.txt
@@ -67,7 +67,7 @@ Release:
         - Set up VAOs
         - We are calling "geometry_prepare_stroke" twice for some reason
         - Replace "geometry_add_dummy_stroke" with something not [so] cursed
-        - Automatically extract locations from shaders (see nitka project for code examples)
+        + Automatically extract locations from shaders (see nitka project for code examples)
     - Presentation / "marketing"
         - Title (InfiNotes? MegaDesk?)
         - Icon
diff --git a/client/webgl_shaders.js b/client/webgl_shaders.js
index a2c65bb..123d768 100644
--- a/client/webgl_shaders.js
+++ b/client/webgl_shaders.js
@@ -68,7 +68,7 @@ const sdf_vs_src = `#version 300 es
             screen02 += vec2(100.0); // shift offscreen
         }
 
-        gl_Position = vec4(screen02 - 1.0, (float(stroke_index) / float(u_stroke_count)) * 2.0 - 1.0, 1.0);
+        gl_Position = vec4(screen02 - 1.0, (float(stroke_index + 1) / float(u_stroke_count)) * 2.0 - 1.0, 1.0);
     }
 `;
 
@@ -323,10 +323,8 @@ function init_webgl(state, context) {
     gl.enable(gl.BLEND);
     gl.blendFunc(gl.ONE, gl.ONE_MINUS_SRC_ALPHA);
 
-    /*
     gl.enable(gl.DEPTH_TEST);
     gl.depthFunc(gl.NOTEQUAL);
-    */
 
     context.gpu_timer_ext = gl.getExtension('EXT_disjoint_timer_query_webgl2');
     if (context.gpu_timer_ext === null) {