some formatting and removing unused variables

manim/renderer/opengl_renderer.py

@@ -201,7 +201,7 @@ class OpenGLRenderer(Renderer):
         self,
         pixel_width: int = config.pixel_width,
         pixel_height: int = config.pixel_height,
-        samples=0,
+        samples=4,
         background_color: c.ManimColor = color.BLACK,
         background_opacity: float = 1.0,
         background_image: str | None = None,
@@ -268,6 +268,7 @@ class OpenGLRenderer(Renderer):
             ]
         )
 
+
         # Preparing vmobject shader
         logger.debug("Initializing Shader Programs")
         self.vmobject_fill_program = load_shader_program_by_folder(
@@ -433,8 +434,6 @@ class OpenGLRenderer(Renderer):
                     np.array(range(len(sub.points))),
                 )
 
-            counter += 1
-
     def get_pixels(self) -> ImageType:
         raw = self.output_fbo.read(components=4, dtype="f1", clamp=True)  # RGBA, floats
         buf = np.frombuffer(raw, dtype=np.uint8).reshape((1080, 1920, -1))

manim/renderer/shaders/quadratic_bezier_fill/frag.glsl

@@ -53,7 +53,7 @@ void main() {
     {
         gl_FragDepth = gl_FragCoord.z - index / 1000.0;
     }
-    stencil_value.r = index;
+    stencil_value.rgb = vec3(index);
     stencil_value.a = 1.0;
     frag_color = color;
     if (fill_all == 1.0) return;