Exemplo n.º 1
0
  /**
   * <code>rotateUpTo</code> is a utility function that alters the local rotation to point the Y
   * axis in the direction given by newUp.
   *
   * @param newUp the up vector to use - assumed to be a unit vector.
   */
  public void rotateUpTo(Vector3f newUp) {
    TempVars vars = TempVars.get();

    Vector3f compVecA = vars.vect1;
    Quaternion q = vars.quat1;

    // First figure out the current up vector.
    Vector3f upY = compVecA.set(Vector3f.UNIT_Y);
    Quaternion rot = localTransform.getRotation();
    rot.multLocal(upY);

    // get angle between vectors
    float angle = upY.angleBetween(newUp);

    // figure out rotation axis by taking cross product
    Vector3f rotAxis = upY.crossLocal(newUp).normalizeLocal();

    // Build a rotation quat and apply current local rotation.
    q.fromAngleNormalAxis(angle, rotAxis);
    q.mult(rot, rot);

    vars.release();

    setTransformRefresh();
  }
Exemplo n.º 2
0
 /**
  * Initialize the Plane using the given 3 points as coplanar.
  *
  * @param v1 the first point
  * @param v2 the second point
  * @param v3 the third point
  */
 public void setPlanePoints(Vector3f v1, Vector3f v2, Vector3f v3) {
   normal.set(v2).subtractLocal(v1);
   normal.crossLocal(v3.x - v1.x, v3.y - v1.y, v3.z - v1.z).normalizeLocal();
   constant = normal.dot(v1);
 }