FBProperty - Object Properties

Object Properties

The state and behavior of an FBComponent is controlled by its list of properties (FBProperty). To obtain an FBComponent's list of FBProperty instances, you may (1): consult the SDK's class reference documentation, or (2): iterate through the FBComponent.PropertyList to print the names of the component's properties:

for property in lComponent.PropertyList:
    # The following name can be used to obtain a property in FBComponent.PropertyList.Find(<name>)
    print( property.Name )

Observe that an FBModel uses instances of FBProperty to define the local translation, rotation and scaling vectors. Properties can be accessed in two ways:

• Directly from the FBComponent.

  In the following code sample, we obtain the local translation vector of a newly created cube.

  cube = FBModelCube('myCube')
  
  # Obtain the translation vector from the cube.
  translationVector = cube.Translation

• From the FBComponent's property list (FBComponent.PropertyList).

  In the following code sample, we first obtain the translation property of a newly created cube. The actual translation vector is contained within the FBProperty object, accessible via FBProperty.Data.

  cube = FBModelCube('myCube')
  
  # Obtain the translation property from the cube.
  translationProperty = cube.PropertyList.Find('Translation')
  
  # Obtain the translation vector from the property object.
  translationVector = translationProperty.Data

Animatable Properties

An animatable property is an instance of FBPropertyAnimatable. Many properties are animatable, such as FBModel.Translation, and FBMaterial.Diffuse. However, before these properties can be animated, they must have their animated status set to True via FBPropertyAnimatable.SetAnimated(). The following example enables the animation of a light's intensity property. For an example on how to animate a camera using key frames and animation nodes (FBAnimationNode), see FBCamera - Cameras.

from pyfbsdk import *


###############################################################
# Main.                                                       #
###############################################################

light = FBLight('myLight')

print( 'light.Intensity animation node: ' + str(light.Intensity.GetAnimationNode()) )

# Enable animation for the light's intensity.
# (!) This initializes the animation node for intensity.
light.Intensity.SetAnimated(True)

print( 'light.Intensity animation node: ' + str(light.Intensity.GetAnimationNode()) )


###############################################################
# Output.                                                     #
###############################################################
'''
light.Intensity animation node: None
light.Intensity animation node: <pyfbsdk.FBAnimationNode object at 0x000000002F588828>
'''

Modifying a Component's List of Properties

By calling FBComponent.PropertyList, we are actually accessing the component's FBPropertyManager. Each instance of FBComponent has its own FBPropertyManager, which contains a list of FBProperty.

An FBProperty may be added or removed from the component using FBComponent.PropertyAdd() and FBComponent.PropertyRemove(). The index returned by FBComponent.PropertyAdd() refers to the property's position in the FBPropertyManager. Additional instances of FBProperty can be created within the FBComponent using FBComponent.PropertyCreate().