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Interaction > Creating sensors

Creating sensors


You use sensors to trigger reactions.

A sensor can have several events. For example a mouse sensor can trigger a reaction on left click, on mouse over, and so on. A time sensor can trigger a reaction at 5 seconds, 11 seconds, and so on.

The Interaction menu displays all available sensors except for the keyboard sensors. These appear in the Interaction Editor.


Mouse sensor

Launches a reaction when the surfer moves the mouse over or clicks an object. You can also apply a mouse sensor to the webcam; in this case, clicking the background launches the reaction. See Mouse sensor.

Time sensor

Launches a reaction at a specific time. See Time sensor.

Proximity

Launches a reaction when one object gets close to another. See Proximity sensor.

Position

Launches a reaction when an object is in a specific position. See Position sensor.

Orientation

Launches a reaction when an object is in a specific orientation. See Orientation sensor.

Parameter Change

Launches a reaction when a parameter changes by more than a specified tolerance. See Parameter Change sensor.

Parameter Range

Launches a reaction when a parameter value enters or exits a given range.

Use this sensor with parameters for which you can specify a range, such as Position, Subdivision, Smoothness, and so on. The parameter range sensor does not work if you cannot specify a range for the parameter, for example, a light's Turned On parameter, object Coloring, and so on. See Parameter Range sensor.

Time Pulse

Specifies a Start/End time, and a frequency at which a reaction will be launched. See Time Pulse sensor.

Download

Launches a reaction when an object's geometry, or a sound or texture file download is complete. See Download sensor.

Refresh Rate

Launches a reaction when the refresh rate changes to a value above or below a target in refresh rate. See Refresh Rate Sensor.

Keyboard
sensors

Launches a reaction when the surfer presses a letter on the keyboard. These sensors are not in the Interaction menu; they appear in the Interaction Editor. See A-Z Key sensor, and Arrow Key sensor.


See also:

Creating reactions

Using Handles

Editing Triggers

Linking Sensors and Reactions

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