Reference for Processing version 1.5. 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

### lerp()

Examples

    float a = 20;
    float b = 80;
    float c = lerp(a, b, .2);
    float d = lerp(a, b, .5);
    float e = lerp(a, b, .8);
    beginShape(POINTS);
    vertex(a, 50);
    vertex(b, 50);
    vertex(c, 50);
    vertex(d, 50);
    vertex(e, 50);
    endShape();

    int x1 = 15;
    int y1 = 10;
    int x2 = 80;
    int y2 = 90;
    line(x1, y1, x2, y2);
    for(int i=0; i<=10; i++) {
      float x = lerp(x1, x2, i/10.0) + 10;
      float y = lerp(y1, y2, i/10.0);
      point(x, y);
    }

Description | Calculates a number between two numbers at a specific increment. The amt parameter is the amount to interpolate between the two values where 0.0 equal to the first point, 0.1 is very near the first point, 0.5 is half-way in between, etc. The lerp function is convenient for creating motion along a straight path and for drawing dotted lines.

Syntax

    lerp(value1, value2, amt)

Parameters

value1 | float or int: first value
value2 | float or int: second value
amt | float: between 0.0 and 1.0

Returns | float
Usage | Web & Application
Related | curvePoint() bezierPoint()

Updated on August 30, 2010 04:29:39pm EDT