Reference for Processing version 1.2. If you have a previous version, use the reference included with your software. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Javadoc.

Name

map()
Examples 
size(400, 400);
float value = 25;
float m = map(value, 0, 100, 0, width);
ellipse(m, 200, 10, 10);
Description Re-maps a number from one range to another. In the example above, the number '25' is converted from a value in the range 0..100 into a value that ranges from the left edge (0) to the right edge (width) of the screen.

Numbers outside the range are not clamped to 0 and 1, because out-of-range values are often intentional and useful.
Syntax 
map(value, low1, high1, low2, high2)
Parameters
value float: The incoming value to be converted
low1 float: Lower bound of the value's current range
high1 float: Upper bound of the value's current range
low2 float: Lower bound of the value's target range
high2 float: Upper bound of the value's target range
Returns float
Usage Web & Application
Related norm()
lerp()
Updated on June 14, 2010 12:05:29pm EDT

Creative Commons License