Python can be used to create new transforms and transitions for use by Ren'Py scripts.
A transform is a python callable that, when called with a displayable, returns another displayable.
init python: # This is a transform that uses the right and # left transforms. def right_or_left(d): if switch: return right(d) else: return left(d)
The python equivalent of an ATL transform is a Transform object.
Transform(child=None, function=None, **properties) link
A transform applies operations such as cropping, rotation, scaling, and alpha-blending to its child. A transform object has fields corresponding to the transform properties, which it applies to its child.
If not none, this is a function that is called when the transform is rendered. The function is called with three arguments:
The function should return a delay, in seconds, after which it will be called again, or None to be called again at the start of the next interaction.
Additional arguments are taken as values to set transform properties to.
This is set to true when the function is called, to indicate that the transform is being hidden.
If hide request is true, this can be set to false to prevent the transform from being hidden.
Call this method with a new child to change the child of this transform.
This should be called when a transform property field is updated outside of the callback method, to ensure that the change takes effect.
A transition is a python callable that, when called with two keyword arguments, returns a displayable that performs the transition effect. The two keyword arguments are:
The returned displayable should have a
delay field, which gives
the number of seconds the transition should run for.
init python: def dissolve_or_pixellate(old_widget=None, new_widget=None): if persistent.want_pixellate: return pixellate(old_widget=old_widget, new_widget=new_widget) else: return dissolve(old_widget=old_widget, new_widget=new_widget)