public synchronized void onNewFrame(UserTracker tracker) {
if (mLastFrame != null) {
mLastFrame.release();
mLastFrame = null;
}
mLastFrame = mTracker.readFrame();
// check if any new user detected
for (UserData user : mLastFrame.getUsers()) {
if (user.isNew()) {
// start skeleton tracking
mTracker.startSkeletonTracking(user.getId());
}
}
VideoFrameRef depthFrame = mLastFrame.getDepthFrame();
if (depthFrame != null) {
ByteBuffer frameData = depthFrame.getData().order(ByteOrder.LITTLE_ENDIAN);
ByteBuffer usersFrame = mLastFrame.getUserMap().getPixels().order(ByteOrder.LITTLE_ENDIAN);
// make sure we have enough room
if (mDepthPixels == null
|| mDepthPixels.length < depthFrame.getWidth() * depthFrame.getHeight()) {
mDepthPixels = new int[depthFrame.getWidth() * depthFrame.getHeight()];
}
calcHist(frameData);
frameData.rewind();
int pos = 0;
while (frameData.remaining() > 0) {
short depth = frameData.getShort();
short userId = usersFrame.getShort();
short pixel = (short) mHistogram[depth];
int color = 0xFFFFFFFF;
if (userId > 0) {
color = mColors[userId % mColors.length];
}
mDepthPixels[pos] = color & (0xFF000000 | (pixel << 16) | (pixel << 8) | pixel);
pos++;
}
}
repaint();
}
private void drawLimb(Graphics g, int x, int y, UserData user, JointType from, JointType to) {
com.primesense.nite.SkeletonJoint fromJoint = user.getSkeleton().getJoint(from);
com.primesense.nite.SkeletonJoint toJoint = user.getSkeleton().getJoint(to);
if (fromJoint.getPositionConfidence() == 0.0 || toJoint.getPositionConfidence() == 0.0) {
return;
}
com.primesense.nite.Point2D<Float> fromPos =
mTracker.convertJointCoordinatesToDepth(fromJoint.getPosition());
com.primesense.nite.Point2D<Float> toPos =
mTracker.convertJointCoordinatesToDepth(toJoint.getPosition());
// draw it in another color than the use color
g.setColor(new Color(mColors[(user.getId() + 1) % mColors.length]));
g.drawLine(
x + fromPos.getX().intValue(),
y + fromPos.getY().intValue(),
x + toPos.getX().intValue(),
y + toPos.getY().intValue());
}