- Processing
- p5.js
- Processing.py
- Processing for Android
- Processing for Pi

- Processing Foundation

This reference is for Processing 3.0+. If you have a previous version, use the reference included with your software in the Help menu. If you see any errors or have suggestions, please let us know. If you prefer a more technical reference, visit the Processing Core Javadoc and Libraries Javadoc.

Name | ### alpha()
Examples |
    noStroke();
    color c = color(0, 126, 255, 102);
    fill(c);
    rect(15, 15, 35, 70);
    float value = alpha(c);  // Sets 'value' to 102
    fill(value);
    rect(50, 15, 35, 70);
Description | Extracts the alpha value from a color.
Syntax |
    alpha(rgb)
Parameters |
rgb | int: any value of the color datatype
Returns | float
Related | red() green() blue() hue() saturation() brightness()

Updated on July 4, 2018 11:56:44am EDT