Interleave base_point and unit_normal in the same array

manimlib/mobject/types/vectorized_mobject.py

@@ -69,8 +69,7 @@ class VMobject(Mobject):
         ('stroke_width', np.float32, (1,)),
         ('joint_product', np.float32, (4,)),
         ('fill_rgba', np.float32, (4,)),
-        ('base_point', np.float32, (3,)),
-        ('unit_normal', np.float32, (3,)),
+        ('base_normal', np.float32, (3,)),  # Every other holds base point and unit normal vector
         ('fill_border_width', np.float32, (1,)),
     ])
     pre_function_handle_to_anchor_scale_factor: float = 0.01
@@ -907,7 +906,7 @@ class VMobject(Mobject):
                 points[1] - points[0],
                 points[2] - points[1],
             )
-        self.data["unit_normal"][:] = normal
+        self.data["base_normal"][1::2] = normal
         return normal
 
     def refresh_unit_normal(self) -> Self:
@@ -1278,7 +1277,7 @@ class VMobject(Mobject):
                 continue
             inner_ends = mob.get_subpath_end_indices()[:-1]
             mob.data["point"][inner_ends + 1] = mob.data["point"][inner_ends + 2]
-            mob.data["unit_normal"] *= -1
+            mob.data["base_normal"][1::2] *= -1
         super().reverse_points()
         return self
 
@@ -1344,7 +1343,7 @@ class VMobject(Mobject):
         stroke_behind = False
         for submob in family:
             if submob._has_fill:
-                submob.data["base_point"] = submob.data["point"][0]
+                submob.data["base_normal"][0::2] = submob.data["point"][0]
             if submob.stroke_behind:
                 stroke_behind = True
 

manimlib/shader_wrapper.py

@@ -265,20 +265,19 @@ class VShaderWrapper(ShaderWrapper):
         # stroke_width 1
         # joint_product 4
         # fill_rgba 4
-        # base_point 3
-        # unit_normal 3
+        # base_normal 3
         # fill_border_width 1
-        self.stroke_vert_format = '3f 4f 1f 4f 44x'
+        self.stroke_vert_format = '3f 4f 1f 4f 32x'
         self.stroke_vert_attributes = ['point', 'stroke_rgba', 'stroke_width', 'joint_product']
 
-        self.fill_vert_format = '3f 36x 4f 3f 3f 4x'
-        self.fill_vert_attributes = ['point', 'fill_rgba', 'base_point', 'unit_normal']
+        self.fill_vert_format = '3f 36x 4f 3f 4x'
+        self.fill_vert_attributes = ['point', 'fill_rgba', 'base_normal']
 
-        self.fill_border_vert_format = '3f 20x 4f 4f 24x 1f'
+        self.fill_border_vert_format = '3f 20x 4f 4f 12x 1f'
         self.fill_border_vert_attributes = ['point', 'joint_product', 'stroke_rgba', 'stroke_width']
 
-        self.fill_depth_vert_format = '3f 52x 3f 16x'
-        self.fill_depth_vert_attributes = ['point', 'base_point']
+        self.fill_depth_vert_format = '3f 40x 3f 16x'
+        self.fill_depth_vert_attributes = ['point', 'base_normal']
 
     def init_vertex_objects(self):
         self.vbo = None

manimlib/shaders/quadratic_bezier_depth/vert.glsl

@@ -1,7 +1,7 @@
 #version 330
 
 in vec3 point;
-in vec3 base_point;
+in vec3 base_normal;
 
 out vec3 verts;
 out vec3 v_base_point;
@@ -9,6 +9,6 @@ out int v_vert_index;
 
 void main(){
     verts = point;
-    v_base_point = base_point;
+    v_base_point = base_normal;
     v_vert_index = gl_VertexID;
 }

manimlib/shaders/quadratic_bezier_fill/geom.glsl

@@ -5,8 +5,7 @@ layout (triangle_strip, max_vertices = 6) out;
 
 in vec3 verts[3];
 in vec4 v_color[3];
-in vec3 v_base_point[3];
-in vec3 v_unit_normal[3];
+in vec3 v_base_normal[3];
 in int v_vert_index[3];
 
 out vec4 color;
@@ -28,7 +27,7 @@ const vec2 SIMPLE_QUADRATIC[3] = vec2[3](
 
 
 void emit_triangle(vec3 points[3], vec4 v_color[3]){
-    vec3 unit_normal = v_unit_normal[1];
+    vec3 unit_normal = v_base_normal[1];
 
     orientation = sign(determinant(mat3(
         unit_normal,
@@ -61,7 +60,7 @@ void main(){
     // Emit main triangle
     fill_all = 1.0;
     emit_triangle(
-        vec3[3](v_base_point[0], verts[0], verts[2]),
+        vec3[3](v_base_normal[0], verts[0], verts[2]),
         vec4[3](v_color[1], v_color[0], v_color[2])
     );
     // Edge triangle

manimlib/shaders/quadratic_bezier_fill/vert.glsl

@@ -2,19 +2,16 @@
 
 in vec3 point;
 in vec4 fill_rgba;
-in vec3 base_point;
-in vec3 unit_normal;
+in vec3 base_normal;
 
 out vec3 verts;  // Bezier control point
 out vec4 v_color;
-out vec3 v_base_point;
-out vec3 v_unit_normal;
+out vec3 v_base_normal;
 out int v_vert_index;
 
 void main(){
     verts = point;
     v_color = fill_rgba;
-    v_base_point = base_point;
-    v_unit_normal = unit_normal;
+    v_base_normal = base_normal;
     v_vert_index = gl_VertexID;
 }