After the previous lesson, the
map node linearly maps the 20–50°C range to the
0–90° servo rotation. Let’s raise the sensitivity. Say, we want to map 15–30°C
to 0–90° rotation.
However, what will happen if the
X pin of the
map receives data that is
outside the input range (10 or 42, for example)? The output value which is a
servo angle will fall outside the desired range too.
For such cases there is a sibling node called
map-clip. It works the same way,
but any input that is out of range will be rounded to
Smax. Thus, if
X receives a value of 10, the
map-clip node will accept it as 15, and 42
will be accepted as 30.
Just use the
map-clip instead of the
map if you want the output range to be
If you prefer °F, you can easily translate the data from the thermometer with
c-to-f node from
xod/units. The range will be 59–95°F.