Processing for Android

ARTrackable

This class provides methods to query the status of a trackable surface. Anchors are attached to a trackable.

• String id()
  

  A unique string ID for the trackable.

• PMatrix3D matrix()
  

  It returns the pose matrix associated to this trackable.

• transform()
  

  Applies the pose matrix to the scene.

• float[] getPolygon()
  

  Returns the list of points [x0, z0, x1, z1...] defining the current boundary of the trackable (it can change from frame to frame).

• float lengthX()
  

  Returns the total extent of the trackable along X.

• float lengthY()
  

  Returns the total extent of the trackable along Y

• float lengthZ()
  

  Returns the total extent of the trackable along Z

• boolean isSelected()
  

  Returns true if the trackable is selected.

• boolean isNew()
  

  Returns true if this is a trackable detected in the last frame.

• boolean isTracking()
  

  Returns true if the trackable is being tracked.

• boolean isPaused()
  

  Returns true if the tracking of this trackable is currently paused.

• boolean isStopped()
  

  Returns true if the tracking of this trackable is stopped, if so, the trackable will be automatically removed in the next frame.

• boolean isPlane()
  

  Returns true if the trackable is a plane.

• boolean isPointCloud()
  

  Returns true if the trackable is a point cloud.

• boolean isFloorPlane()
  

  Returns true if the trackable is a floor plane.

• boolean isFloorPlane()
  

  Returns true if the trackable is a ceiling plane.

• boolean isWallPlane()
  

  Returns true if the trackable is a wall plane.

import processing.ar.*;

ARTracker tracker;

void setup() {
  fullScreen(AR);
  tracker = new ARTracker(this);
  tracker.start();
}

void draw() {
  lights();

  // Draw trackable planes
  for (int i = 0; i < tracker.count(); i++) {
    ARTrackable trackable = tracker.get(i);
    if (!trackable.isTracking()) continue;

    pushMatrix();
    trackable.transform();
    if (mousePressed && trackable.isSelected(mouseX, mouseY)) {
      fill(255, 0, 0, 100);
    } else {
      fill(255, 100);
    }

    beginShape(QUADS);
    float lx = trackable.lengthX();
    float lz = trackable.lengthZ();
    vertex(-lx/2, 0, -lz/2);
    vertex(-lx/2, 0, +lz/2);
    vertex(+lx/2, 0, +lz/2);
    vertex(+lx/2, 0, -lz/2);
    endShape();
    popMatrix();
  }
}