Game Development Reference
3. Select the whale and click Add Sensor to choose a sensor called Touch . You will also
see the Keyboard sensors that were made for moving the whale (refer to Chapter 1 ,
Things You Need to Know , to see how they were created):
We use the Touch sensor when the object is in contact with another object
without the needed properies. A Collision sensor works like a Touch
sensor, but we can also filter by property as we saw in the previous chapter.