From ae2a253fb11928f91a7f84893d869c8103d09101 Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Sun, 8 Jan 2023 21:56:38 -0500
Subject: [PATCH] Just pass one bevel parameter rather than two

---
 manimlib/shaders/quadratic_bezier_stroke/frag.glsl | 7 +++----
 manimlib/shaders/quadratic_bezier_stroke/geom.glsl | 6 ++----
 2 files changed, 5 insertions(+), 8 deletions(-)

diff --git a/manimlib/shaders/quadratic_bezier_stroke/frag.glsl b/manimlib/shaders/quadratic_bezier_stroke/frag.glsl
index bd7c281f..f795a487 100644
--- a/manimlib/shaders/quadratic_bezier_stroke/frag.glsl
+++ b/manimlib/shaders/quadratic_bezier_stroke/frag.glsl
@@ -11,8 +11,7 @@ in float uv_anti_alias_width;
 
 in float has_prev;
 in float has_next;
-in float bevel_start;
-in float bevel_end;
+in float bevel;
 in float angle_from_prev;
 in float angle_to_next;
 
@@ -33,7 +32,7 @@ float modify_distance_for_endpoints(vec2 p, float dist, float t){
         // Clip the start
         if(has_prev == 0) return max(dist, -p.x + buff);
         // Bevel start
-        if(bevel_start == 1){
+        if(bevel == 1){
             float a = angle_from_prev;
             mat2 rot = mat2(
                 cos(a), sin(a),
@@ -60,7 +59,7 @@ float modify_distance_for_endpoints(vec2 p, float dist, float t){
         float perp_dist = dot(p - uv_b2, v21) / len_v21;
         if(has_next == 0) return max(dist, -perp_dist + buff);
         // Bevel end
-        if(bevel_end == 1){
+        if(bevel == 1){
             float a = -angle_to_next;
             mat2 rot = mat2(
                 cos(a), sin(a),
diff --git a/manimlib/shaders/quadratic_bezier_stroke/geom.glsl b/manimlib/shaders/quadratic_bezier_stroke/geom.glsl
index afeb92e8..5e4bdf3c 100644
--- a/manimlib/shaders/quadratic_bezier_stroke/geom.glsl
+++ b/manimlib/shaders/quadratic_bezier_stroke/geom.glsl
@@ -32,8 +32,7 @@ out float uv_anti_alias_width;
 
 out float has_prev;
 out float has_next;
-out float bevel_start;
-out float bevel_end;
+out float bevel;
 out float angle_from_prev;
 out float angle_to_next;
 
@@ -159,8 +158,7 @@ void find_joint_info(){
         (joint_type == AUTO_JOINT && bezier_degree == 1.0) ||
         joint_type == BEVEL_JOINT
     );
-    bevel_start = float(should_bevel);
-    bevel_end = float(should_bevel);
+    bevel = float(should_bevel);
 }