/**
* <code>lookAt</code> is a convienence method for auto-setting the quaternion based on a
* direction and an up vector. It computes the rotation to transform the z-axis to point into
* 'direction' and the y-axis to 'up'.
*
* @param direction where to look at in terms of local coordinates
* @param up a vector indicating the local up direction. (typically {0, 1, 0} in jME.)
*/
public void lookAt(Vector3f direction, Vector3f up) {
TempVars vars = TempVars.get();
assert vars.lock();
vars.vect3.set(direction).normalizeLocal();
vars.vect1.set(up).crossLocal(direction).normalizeLocal();
vars.vect2.set(direction).crossLocal(vars.vect1).normalizeLocal();
fromAxes(vars.vect1, vars.vect2, vars.vect3);
assert vars.unlock();
}
private void refreshFont() {
Camera cam = IsoCamera.getInstance().getCam();
Vector3f start = from.getPlanet().getPosition();
Vector3f end = to.getPlanet().getPosition();
float width = label.getLineWidth();
Random r = new Random();
// float height = r.nextFloat() * end.subtract(start).z;
Vector3f position = new Vector3f(width / 2, .15f, 0);
Vector3f fontPos = start.add(end.subtract(start).mult(0.4f + 0.75f * r.nextFloat()));
position.addLocal(fontPos);
Vector3f up = cam.getUp().clone();
Vector3f dir = cam.getDirection().clone().negateLocal().normalizeLocal();
Vector3f left = cam.getLeft().clone().normalizeLocal().negateLocal();
Quaternion look = new Quaternion();
look.fromAxes(left, up, dir);
label.setLocalTransform(new Transform(position, look));
// Vector3f camPos = IsoCamera.getInstance().getCam().getLocation();
// Vector3f fontPos = to.getPlanet().getPosition().
// subtract(from.getPlanet().getPosition());
// Vector3f up = IsoCamera.getInstance().getCam().getUp().clone();
// Vector3f dir = camPos.subtract(fontPos);
//// Vector3f dir = Vector3f.UNIT_Y.clone().subtract(fontPos);
//
// Vector3f left = IsoCamera.getInstance().getCam().getLeft().clone();
// dir.normalizeLocal();
// left.negateLocal();
// left.normalizeLocal();
// up.normalizeLocal();
//// dir.negateLocal();
//
// Quaternion look = new Quaternion();
// look.fromAxes(left, up, dir);
//
// Vector3f newPos = to.getPlanet().getPosition().
// subtract(from.getPlanet().getPosition());
//
// newPos.x -= label.getLineWidth() / 2;
//
// Transform t = new Transform(newPos, look);
//
// label.setLocalTransform(t);
}
static {
DIRECTION_Z.fromAxes(Vector3f.UNIT_X, Vector3f.UNIT_Y, Vector3f.UNIT_Z);
}
