modelZ()

Returns the three-dimensional X, Y, Z position in model space. This returns the Z value for a given coordinate based on the current set of transformations (scale, rotate, translate, etc.) The Z value can be used to place an object in space relative to the location of the original point once the transformations are no longer in use.

In the example, the modelX(), modelY(), and modelZ() functions record the location of a box in space after being placed using a series of translate and rotate commands. After popMatrix() is called, those transformations no longer apply, but the (x, y, z) coordinate returned by the model functions is used to place another box in the same location.

• void setup() {
   size(500, 500, P3D);
   noFill();
  }
  
  void draw() {
   background(0);
   
   pushMatrix();
   // start at the middle of the screen
   translate(width/2, height/2, -200); 
   // some random rotation to make things interesting
   rotateY(1.0); //yrot);
   rotateZ(2.0); //zrot);
   // rotate in X a little more each frame
   rotateX(frameCount / 100.0);
   // offset from center
   translate(0, 150, 0);
   
   // draw a white box outline at (0, 0, 0)
   stroke(255);
   box(50);
   
   // the box was drawn at (0, 0, 0), store that location
   float x = modelX(0, 0, 0);
   float y = modelY(0, 0, 0);
   float z = modelZ(0, 0, 0);
   // clear out all the transformations
   popMatrix();
  
   // draw another box at the same (x, y, z) coordinate as the other
   pushMatrix();
   translate(x, y, z);
   stroke(255, 0, 0);
   box(50);
   popMatrix();
  } 
  

• modelZ(x, y, z)

• x(float)3D x-coordinate to be mapped
• y(float)3D y-coordinate to be mapped
• z(float)3D z-coordinate to be mapped

• float

• modelX()
• modelY()