From a8ef9629eb34813553bc5ab9ab239b047ce48c68 Mon Sep 17 00:00:00 2001
From: Grant Sanderson <grant@3blue1brown.com>
Date: Tue, 20 Aug 2024 09:10:33 -0500
Subject: [PATCH] More direct lerp in Mobject.interpolate

---
 manimlib/mobject/mobject.py | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/manimlib/mobject/mobject.py b/manimlib/mobject/mobject.py
index 5c6d22ab..48bd9093 100644
--- a/manimlib/mobject/mobject.py
+++ b/manimlib/mobject/mobject.py
@@ -1810,26 +1810,23 @@ class Mobject(object):
         if keys:
             self.note_changed_data()
         for key in keys:
-            func = path_func if key in self.pointlike_data_keys else interpolate
             md1 = mobject1.data[key]
             md2 = mobject2.data[key]
             if key in self.const_data_keys:
                 md1 = md1[0]
                 md2 = md2[0]
-            self.data[key] = func(md1, md2, alpha)
+            if path_func in self.pointlike_data_keys:
+                self.data[key] = path_func(md1, md2, alpha)
+            else:
+                self.data[key] = (1 - alpha) * md1 + alpha * md2
 
-        keys = [k for k in self.uniforms if k not in self.locked_uniform_keys]
-        for key in keys:
+        for key in self.uniforms:
+            if key in self.locked_uniform_keys:
+                continue
             if key not in mobject1.uniforms or key not in mobject2.uniforms:
                 continue
-            self.uniforms[key] = interpolate(
-                mobject1.uniforms[key],
-                mobject2.uniforms[key],
-                alpha
-            )
-        self.bounding_box[:] = path_func(
-            mobject1.bounding_box, mobject2.bounding_box, alpha
-        )
+            self.uniforms[key] = (1 - alpha) * mobject1.uniforms[key] + alpha * mobject2.uniforms[key]
+        self.bounding_box[:] = path_func(mobject1.bounding_box, mobject2.bounding_box, alpha)
         return self
 
     def pointwise_become_partial(self, mobject, a, b) -> Self: