Update app.py

app.py

@@ -4,19 +4,21 @@ import numpy as np
 from PIL import Image
 import tempfile
 
-def apply_section_texture(section):
+def apply_masked_texture(section):
     # Load the original mesh
     mesh = trimesh.load('train.glb', force='mesh')
+
+    # Load the new texture image
     im = Image.open('rust_steel.png').convert('RGB')
 
-    # Calculate the bounding box coordinates
+    # Calculate bounding box coordinates
     bounds = mesh.bounds
     min_bounds, max_bounds = bounds[0], bounds[1]
     mid_x = (max_bounds[0] + min_bounds[0]) / 2
     mid_y = (max_bounds[1] + min_bounds[1]) / 2
     mid_z = (max_bounds[2] + min_bounds[2]) / 2
 
-    # Define sections with relevant indices
+    # Define sections
     sections = {
         'upper': np.where(mesh.vertices[:, 2] > mid_z)[0],
         'lower': np.where(mesh.vertices[:, 2] <= mid_z)[0],
@@ -30,23 +32,20 @@ def apply_section_texture(section):
     # Get indices for the selected section
     selected_indices = sections[section]
 
-    # Prepare new UV coordinates
-    uv = np.random.rand(len(mesh.vertices), 2)
-    new_uv = np.copy(uv)
-
-    # Apply UV changes only for selected section
-    mask = np.zeros(len(mesh.vertices), dtype=bool)
-    mask[selected_indices] = True
-    new_uv[~mask, :] = uv[~mask]  # Keep original UVs for non-selected regions
+    # Copy the original visual properties (colors, UVs)
+    if mesh.visual.vertex_colors is not None:
+        new_vertex_colors = np.copy(mesh.visual.vertex_colors)
+    else:
+        new_vertex_colors = np.ones((len(mesh.vertices), 4)) * 255  # Assuming original is white or neutral
 
-    # Apply new material texture to the selected indices
-    material = trimesh.visual.texture.SimpleMaterial(image=im)
-    color_visuals = trimesh.visual.TextureVisuals(uv=new_uv, material=material)
+    # Apply the new texture to only the selected section
+    for idx in selected_indices:
+        new_vertex_colors[idx, :] = [255, 255, 0, 255]  # Example yellow RGBA color
 
-    # Create a new mesh with the visual
-    textured_mesh = trimesh.Trimesh(vertices=mesh.vertices, faces=mesh.faces, visual=color_visuals, validate=True, process=False)
+    # Apply the new visual properties
+    textured_mesh = trimesh.Trimesh(vertices=mesh.vertices, faces=mesh.faces, visual=trimesh.visual.ColorVisuals(vertex_colors=new_vertex_colors), validate=True, process=False)
 
-    # Save the mesh to a temporary file
+    # Save to a temporary file for Gradio visualization
     temp_file = tempfile.NamedTemporaryFile(delete=False, suffix='.glb')
     textured_mesh.export(temp_file.name, file_type='glb')
     temp_file.close()
@@ -59,6 +58,6 @@ with gr.Blocks() as app:
 
     section_dropdown = gr.Dropdown(choices=['upper', 'lower', 'middle', 'top', 'right'], label="Select Section")
     button = gr.Button("Apply Texture to Section")
-    button.click(apply_section_texture, inputs=section_dropdown, outputs=modified_model)
+    button.click(apply_masked_texture, inputs=section_dropdown, outputs=modified_model)
 
 app.launch()