From ba0f02ea38c913e2977bc3aaef923218d14bcf46 Mon Sep 17 00:00:00 2001
From: Garima <garima19802003@gmail.com>
Date: Fri, 12 Jan 2024 23:57:05 +0530
Subject: [PATCH]  Solves issue #4214

---
 src/webgl/p5.RendererGL.js |  9 +++++++++
 src/webgl/p5.Shader.js     | 13 +++++++++----
 2 files changed, 18 insertions(+), 4 deletions(-)

diff --git a/src/webgl/p5.RendererGL.js b/src/webgl/p5.RendererGL.js
index 097c9ab8c1..3c95d335f6 100644
--- a/src/webgl/p5.RendererGL.js
+++ b/src/webgl/p5.RendererGL.js
@@ -23,6 +23,15 @@ const defineStrokeJoinEnum = function (key, val) {
   STROKE_JOIN_ENUM[constants[key]] = val;
 };
 
+p5.prototype.linePerspective = function (enable) {
+  if (enable) {
+    this.drawingContext.linePerspective = true;
+  } else {
+    this.drawingContext.linePerspective = false;
+  }
+};
+
+
 // Define constants in line shaders for each type of cap/join, and also record
 // the values in JS objects
 defineStrokeCapEnum('ROUND', 0);
diff --git a/src/webgl/p5.Shader.js b/src/webgl/p5.Shader.js
index 3bb6c63a1a..90bbca439f 100644
--- a/src/webgl/p5.Shader.js
+++ b/src/webgl/p5.Shader.js
@@ -325,10 +325,15 @@ p5.Shader = class {
 
     if (this.isStrokeShader()) {
       if (this._renderer._curCamera.cameraType === 'default') {
-        // strokes scale up as they approach camera, default
-        this.setUniform('uPerspective', 1);
-      } else {
-        // strokes have uniform scale regardless of distance from camera
+        // Check if line perspective is enabled
+        if (this._renderer.drawingContext.linePerspective) {
+          // strokes scale up as they approach camera, default
+          this.setUniform('uPerspective', 1);
+        } else {
+          this.setUniform('uPerspective', 0);
+        }
+      }else{
+      // Strokes have a uniform scale regardless of the distance from the camera
         this.setUniform('uPerspective', 0);
       }
     }