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v5.09

Maya

Load Cameras

Luis Miguel 31/10/2024

Tags
maya camera td

Load Cameras

Luis Miguel

Action v1

31/10/2024

Maya

Pseudo-Code

282	read the maintask key from store in case the action is in a logic or callback.
284	If the action is not in a logic/callback use a default maintask_key
285	Get all the cameras (last version) for the current file.
287	Load each camera file.

Parameters

maintask_key

The maintrask_key to read the cameras from. In a callback or logic can be added and selected under the task and recived in the store. For actions in the Kraken shelf, paste the key in the code.

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Import to my Pipeline

Code

print('Loading Tracking Camera...')
import maya.cmds as cmds
import pipeline
import os

def import_camera(file_path):
    """Imports the cameras from the file in Maya
    
    Args:
        file_path str: The path to the camera file.
        
    Returns:
        list: The imported cameras.
    """
    if not os.path.exists(file_path):
        cmds.warning("The file does not exists: " + file_path)
        return
    ext = os.path.splitext(file_path)[-1].lower()
    pre_cameras = cmds.ls(type="camera")
    if ext == ".abc":
        cmds.AbcImport(file_path, mode="import")
    elif ext == ".fbx":
        cmds.file(file_path, i=True, type="FBX", 
                  mergeNamespacesOnClash=False, ignoreVersion=True)
    else:
        cmds.warning(f"Camera format file '{ext}' not supported. "
                     "Action only supports .abc or .fbx")
        return
    # Find imported camera
    cameras = cmds.ls(type="camera")
    imported_cameras = [cam for cam in cameras if not cmds.referenceQuery(
        cam, isNodeReferenced=True)]
    imported_cameras = [cam for cam in imported_cameras if cam not in pre_cameras]

if not imported_cameras:
        cmds.warning(f"No cameras imported from: {file_path}.")
        return
    return imported_cameras

def create_camera():
    """Creates an empty camera.
    
    Returns:
        list: The camera shape names.
    """
    # New camera
    group = cmds.group(em=True, name="default_camera_grp")
    camera_transform = cmds.createNode("transform", name="TrackingCamera", 
                                       parent=group)
    camera_shape = cmds.createNode("camera", name="TrackingCameraShape", 
                                   parent=camera_transform)

# Basic config
    cmds.setAttr(f"{camera_shape}.focalLength", 35)
    cmds.setAttr(f"{camera_shape}.nearClipPlane", 0.1)
    cmds.setAttr(f"{camera_shape}.farClipPlane", 10000)
    cmds.setAttr(f"{camera_shape}.renderable", 1)

print(f"New camera '{camera_transform}' created successfully.")
    return [camera_shape]

def import_or_create_camera(filepath=None):
    """Imports or create a camera from a file.
    
    Args:
        filepath str: The path to the camera file. (Default=None)
    """
    # Create default groups
    tracking_group = "Cameras|Tracking"
    if not cmds.objExists("Cameras"):
        cmds.group(em=True, name="Cameras")
    if not cmds.objExists(tracking_group):
        tracking_group = cmds.group(em=True, name="Tracking", parent="Cameras")

if not filepath or not os.path.exists(filepath):
        cmds.warning(f"File does not exist: {filepath}. Creating a new camera instead.")
        imported_cameras = create_camera()
    else:
        imported_cameras = import_camera(filepath)
        if not imported_cameras:
            cmds.warning(f"No cameras imported from: {filepath}.")
            return
    print(f"Loaded cameras: {imported_cameras}")
    # TODO define what to do if more that 1 camera is imported
    camera_shape = imported_cameras[0]
    camera_transform = cmds.listRelatives(camera_shape, parent=True, fullPath=True)[0]
    camera_grp = cmds.listRelatives(camera_transform, parent=True, fullPath=True)[0]
    # Rename group
    new_grp_name = f"{camera_transform.split('|')[-1]}_grp"
    cmds.rename(camera_grp, new_grp_name)
    # Move camera to group "Cameras/Tracking"
    cmds.parent(new_grp_name, tracking_group)
    print(f"Camera '{camera_transform}' loaded successfully.")
    
    # Disable default render camera
    if cmds.objExists("perspShape"):
        cmds.setAttr("perspShape.renderable", 0)
        print("Camera 'persp' is now non-renderable.")

def exec_query(query):
    """Execs a query to get data from the platform.
    
    Args:
        query str: The query to execute.
        
    Returns:
        dict: The query response.
    """
    if query.find("token:") < 0:
        print("Warning: The token key is not included in" 
               "the query, it will probably fail.")
    try:
        response = pipeline.query(query)
    except Exception as e:
        print("Error on DB query: ", e)
        return
    return response
    
def get_shot_key(filename):
    """Gets the key of the shot linked to the file.
    
    Args:
        filename str: the filename to query.
        
    Returns:
        str: The shot key.
    """
    query = '''
    query {
        file(fileName: "{filename}", token:"{token}"){
          fileName
          folder{
            code
            relTaskFolder{
              code
              relShotTask{
                code
                key
              }
            }
          }
        }
      }
    '''
    query = query.replace("{filename}", filename)
    response = exec_query(query)
    if not response:
        return
    tasks = response["file"]["folder"]["relTaskFolder"]
    if not tasks:
        print(f"Error: No tasks found linked to the folder "
              f"'{response['file']['folder']['code']}' of file "
              f"'{response['file']['fileName']}'.")
        return
    shots = tasks[0]['relShotTask']
    if not shots:
        print(f"Error: No shots found linked to the task '{tasks[0]['code']}'.")
        return
    shot = shots[0]
    return shot['key']

def get_shot_task(shot_key, maintask_key, attrs=[]):
    """Gets the task of an specific maintask type for a shot.
    
    Args:
        shot_key str: The shot key.
        maintask_key: the maintask_key.
        attrs list: The list of attributes to get. (Default=[])
    
    Returns:
        dict: The task data.
    """
    query = '''
    query{
      task(maintask:"{maintask}", shotKey:"{shotKey}", token:"{token}") {
        name
        key
      }
    }
    '''
    query = query.replace("{maintask}", maintask_key)
    query = query.replace("{shotKey}", shot_key)
    # TODO add support for custom attributes in the query
    response = exec_query(query)
    if not response:
        return
    task = response['task']
    return task

def get_last_folder_from_task(task_key, folder='render'):
    """Get the last folder of an specific type for a task.
    
    Args:
        task_key str: The key of the task.
        folder str: The folder type to get.
        
    Returns:
        dict: The folder data.
    """
    query = '''
    query{
      lastFolderByTask(taskKey:"{taskKey}", type:"{folder_type}", token:"{token}"){
        folderLocal
        review
        wip
        files{
          fileName
        }
      }
    }
    '''
    query = query.replace("{taskKey}", task_key)
    query = query.replace("{folder_type}", folder)
    response = exec_query(query)
    if not response:
        return
    folder = response['lastFolderByTask']
    return folder

def get_last_task_folder_from_file(filename, maintask_key, folder='render'):
    """Get kast folder of an especific type for a maintask type given a filename.
    
    Args:
        filename str: The name of the file.
        maintask_key str: The task type to get from the shot.
        folder str: The folder type to get the last from. (Default='render')
        
    Returns:
        dict: The folder data.
    """
    shot_key = get_shot_key(filename)
    if not shot_key:
        return
    task = get_shot_task(shot_key, maintask_key)
    if not task:
        return
    folder = get_last_folder_from_task(task['key'], folder=folder)
    return folder

def get_cameras_from_folder(folder):
    """Get the cameras to import from a folder.
    
    Args:
        folder str: The folder type name.
        
    Returns:
        list: The camera file paths.
    """
    cameras = []
    
    for f in folder['files']:
        cam_path = os.path.normpath(os.path.join(
            folder['folderLocal'],
            f['fileName']
        ))
        cameras.append(cam_path)
    
    return cameras

def get_last_cam_current_file(maintask_key):
    """Get the cameras to import from a maintask.
    
    Args:
        maintask_key str: The maintask to get the camera from.
        
    Returns:
        list: The camera file paths.
    """
    filepath = cmds.file(q=True, sn=True)
    filename = os.path.basename(filepath)
    folder = get_last_task_folder_from_file(filename, 
                                            maintask_key, 
                                            folder='cameras')
    if not folder:
        return []
    cameras = get_cameras_from_folder(folder)
    return cameras

# Store
try:  # Get maintask key from state action if the action is in a logic/callback
    maintask_key = store["state_action_list"][0]["maintask"]
except:  # Set default maintask to allow execution from Kraken actions shelf
    maintask_key = ""
cameras = get_last_cam_current_file(maintask_key)
for cam in cameras:
    import_or_create_camera(filepath=cam)
print('Cameras loading successfully.')

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