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 | screenX() | ||||||
|---|---|---|---|---|---|---|---|
| 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 line in 2D at same x value
  // Notice the parallax
  stroke(102);
  line(x, 0, 0, x, height, 0);
  
  // Draw 2D line to match the x value
  // element drawn at z = -100 
  stroke(0);
  float theX = screenX(x, y, z);
  line(theX, 0, 0, theX, height, 0);    
} | ||||||
| Description | Takes a three-dimensional X, Y, Z position and returns the X value for where it will appear on a (two-dimensional) screen. | ||||||
| Syntax | screenX(x, y, z) | ||||||
| Parameters | 
 | ||||||
| Returns | float | ||||||
| Usage | Web & Application | ||||||
| Related | screenY() screenZ() | 

