Update app.py

app.py

@@ -31,26 +31,26 @@ def generate_2d_view(file):
 
 def generate_3d_view(file):
     try:
-        # Import CAD file
+        # Import CAD file and create a Workplane object
         model = cq.importers.importStep(file.name)
 
-        # Extract all solids from the Compound object
+        # Extract all solids from the Workplane object
         solids = model.solids()
         if not solids:
             raise ValueError("No solids found in the CAD model.")
 
-        # Convert solids into trimesh meshes
+        # Convert solids into trimesh-compatible meshes
         meshes = []
         for solid in solids:
             vertices = []
             faces = []
             for face in solid.tessellate():
-                vertices.extend(face[0])  # Extract vertices
-                faces.extend([[face[1][i], face[1][i + 1], face[1][i + 2]] for i in range(0, len(face[1]), 3)])  # Faces
+                vertices.extend(face[0])  # Extract vertices (x, y, z)
+                faces.extend([[face[1][i], face[1][i + 1], face[1][i + 2]] for i in range(0, len(face[1]), 3)])  # Triangular faces
             mesh = trimesh.Trimesh(vertices=vertices, faces=faces)
             meshes.append(mesh)
 
-        # Combine all meshes into one (if multiple solids)
+        # Combine all meshes into a single trimesh object if multiple solids exist
         combined_mesh = trimesh.util.concatenate(meshes) if len(meshes) > 1 else meshes[0]
 
         # Visualize the mesh
@@ -60,7 +60,7 @@ def generate_3d_view(file):
     except Exception as e:
         return f"Error generating 3D view: {str(e)}"
 
-        
+      
 # Wrapper function to generate views
 def generate_views(file):
     try: