FadeTo Action

Overview

The FadeTo Action Node.

The FadeTo Action Node continuously modifies the Opacity of an Object over a specified period of time, thus creating an Animation. The final value of the Opacity is set by the user. Find an example of how to use this Node and its effect over an Object at the end of this page.

Furthermore, visit the Actions Nodes page for a general introduction to these Nodes.

Scope: Scene, Function, Prefab.

Attributes

The FadeTo Action Node Attributes.

Attribute	Type	Description
Duration (sec)	Float	The total time of the Action, if none is received in the Duration Input Socket.
To	Float	The desired Opacity value at the end of the Action, if none is received in the To Input Socket.
Interpolation	Drop-down	The Interpolation method to use for calculating the intermediate values of the Opacity. It can be Linear, Sine Ease In, Sine Ease In Out, or Sine Ease Out.

Inputs

Input	Type	Description
Instance ID	InstanceID	The assigned Instance ID of the Action. If nothing is received, it automatically assigns 0 as the Instance ID.
(►) Start	Pulse	A standard Input Pulse, to trigger the execution of the Node.
Object ID	ObjectID	The ID of the target Object.
Duration	Float	The total time (in seconds).
To	Float	The desired Opacity value at the end of the Action.

Outputs

Output	Type	Description
Instance ID	InstanceID	The assigned Instance ID of the Action.
OnStart (►)	Pulse	Flows to the next Node following FadeTo Action when the Action starts.
OnEnd (►)	Pulse	Flows to the next Node following FadeTo Action when the Action stops.

Example

This section shows a simple example of how to use the FadeTo Action Node and the effect it has on an Object. We start by configuring the Scene, then build the Logic, and finally show the result.

Scene Configuration

We consider a Scene with two Objects: a white arc over a black background, both of which can be easily created in the Scene Outliner. Then, we set the Size Attribute of the arc to $(500, 500, 0)$. See this configuration in the following image:

Scene configuration.

Logic

We then need to configure the Logic. This is done in the Logic Editor.

We use the FadeTo Action Node with the following Attributes:

• Duration (sec): $2$
• To: $0.05$
• Interpolation: Linear

And we connect to it the Object Node of the arc and a Pulse to the Start Input Socket. Thus, having the following Logic configuration:

Logic configuration.

Final result

Finally, the effect of the ScaleTo Action Node when triggered is the following:

Final result.

See Also

• FadeFromTo Action

External Links

• Transparency (graphic) on Wikipedia.