Here we present a tutorial showing how to interact with objects in the 3D world. All objects to be picked are part of a single actor. FURY likes to bundle objects in a few actors to reduce code and increase speed.
When the objects will be picked they will change size and color.
Let’s create a panel to show what is picked
Build scene and add an actor with many objects.
This actor is made with 3 cubes of different orientation
/Users/koudoro/Software/fury/docs/tutorials/01_introductory/viz_picking.py:46: ArgsDeprecationWarning: "heights" was deprecated * deprecated from version: 0.6 * Will raise <class 'fury.deprecator.ExpiredDeprecationError'> as of version: 0.8 * Use argument "scale" instead. fury_actor = actor.cube(centers, directions, colors, heights=radii)
Access the memory of the vertices of all the cubes
Access the memory of the colors of all the cubes
Adding an actor showing the axes of the world coordinates
Create the Picking manager
Time to make the callback which will be called when we pick an object
def left_click_callback(obj, event): # Get the event position on display and pick event_pos = pickm.event_position(showm.iren) picked_info = pickm.pick(event_pos, showm.scene) vertex_index = picked_info['vertex'] # Calculate the objects index object_index = np.int(np.floor((vertex_index / num_vertices) * num_objects)) # Find how many vertices correspond to each object sec = np.int(num_vertices / num_objects) if not selected[object_index]: scale = 6/5 color_add = np.array([30, 30, 30], dtype='uint8') selected[object_index] = True else: scale = 5/6 color_add = np.array([-30, -30, -30], dtype='uint8') selected[object_index] = False # Update vertices positions vertices[object_index * sec: object_index * sec + sec] = scale * \ (vertices[object_index * sec: object_index * sec + sec] - centers[object_index]) + centers[object_index] # Update colors vcolors[object_index * sec: object_index * sec + sec] += color_add # Tell actor that memory is modified utils.update_actor(fury_actor) face_index = picked_info['face'] # Show some info text = 'Object ' + str(object_index) + '\n' text += 'Vertex ID ' + str(vertex_index) + '\n' text += 'Face ID ' + str(face_index) + '\n' text += 'World pos ' + str(np.round(picked_info['xyz'], 2)) + '\n' text += 'Actor ID ' + str(id(picked_info['actor'])) text_block.message = text showm.render()
Bind the callback to the actor
Make the window appear
Change interactive to True to start interacting with the scene
Save the current framebuffer in a PNG file
Total running time of the script: ( 0 minutes 0.171 seconds)