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Name

map()
Examples
size(200, 200);
float value = 25;
float m = map(value, 0, 100, 0, width);
ellipse(m, 200, 10, 10);

float value = 110;
float m = map(value, 0, 100, -20, -10);
println(m);  // Prints "-9.0"

void setup() {
  size(200, 200);
  noStroke();
}

void draw() {
  background(204);
  float  x1 = map(mouseX, 0, width, 50, 150);
  ellipse(x1, 75, 50, 50);  
  float x2 = map(mouseX, 0, width, 0, 200);
  ellipse(x2, 125, 50, 50);  
}
Description Re-maps a number from one range to another.

In the first example above, the number 25 is converted from a value in the range of 0 to 100 into a value that ranges from the left edge of the window (0) to the right edge (width).

As shown in the second example, numbers outside of the range are not clamped to the minimum and maximum parameters values, because out-of-range values are often intentional and useful.
Syntax
map(value, start1, stop1, start2, stop2)
Parameters
value float: the incoming value to be converted
start1 float: lower bound of the value's current range
stop1 float: upper bound of the value's current range
start2 float: lower bound of the value's target range
stop2 float: upper bound of the value's target range
Returnsfloat
Relatednorm()
lerp()
Updated on May 19, 2014 05:30:00pm PDT

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