- 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 | ### screenY()
Examples |
    void setup() {
      size(100, 100, P3D);
    }

    void draw() {
      background(204);

      float x = mouseX;
      float y = mouseY;
      float z = -100;

      // Draw "X" at z = -100
      stroke(255);
      line(x-10, y-10, z, x+10, y+10, z);
      line(x+10, y-10, z, x-10, y+10, z);

      // Draw gray line at z = 0 and same
      // y value. Notice the parallax
      stroke(102);
      line(0, y, 0, width, y, 0);

      // Draw black line at z = 0 to match
      // the y value element drawn at z = -100
      stroke(0);
      float theY = screenY(x, y, z);
      line(0, theY, 0, width, theY, 0);
    }
Description | Takes a three-dimensional X, Y, Z position and returns the Y value for where it will appear on a (two-dimensional) screen.
Syntax |
    screenY(x, y)
    screenY(x, y, z)
Parameters |
x | float: 3D x-coordinate to be mapped
y | float: 3D y-coordinate to be mapped
z | float: 3D z-coordinate to be mapped
Returns | float
Related | screenX() screenZ()

Updated on January 1, 2021 03:38:08am EST
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