Exemplo n.º 1
0
 public void setPivot(ReferenceFrame pivot) {
   Matrix44 m = getTransformation(pivot);
   Matrix44 mInverse = Matrix44.invert(m);
   transform(mInverse, this);
   for (int i = 0; i < getChildCount(); i++) {
     Component child = getChildAt(i);
     if (child instanceof Transformable) {
       ((Transformable) child).transform(m, this);
     } else if (child instanceof Visual) {
       ((Visual) child).transform(m);
     }
   }
 }
Exemplo n.º 2
0
 static {
   s_calculatePointAtHelperOffset.setName("s_calculatePointAtHelperOffset");
   s_calculatePointAtHelperA.setName("s_calculatePointAtHelperA");
   s_calculatePointAtHelperB.setName("s_calculatePointAtHelperB");
   s_calculatePointAtHelperOffset.setIsHelper(true);
   s_calculatePointAtHelperA.setIsHelper(true);
   s_calculatePointAtHelperB.setIsHelper(true);
 }
Exemplo n.º 3
0
  public Matrix33 calculatePointAt(
      ReferenceFrame target,
      javax.vecmath.Vector3d offset,
      javax.vecmath.Vector3d upGuide,
      ReferenceFrame asSeenBy,
      boolean onlyAffectYaw) {
    synchronized (s_calculatePointAtHelperOffset) {
      if (upGuide == null) {
        upGuide = MathUtilities.getYAxis();
      }
      if (asSeenBy == null) {
        asSeenBy = (ReferenceFrame) getParent();
      }
      Matrix44 transform = getTransformation(asSeenBy);
      Vector3 position = transform.getPosition();
      // Vector3 position = new Vector3( transform.m30, transform.m31,
      // transform.m32 );

      ReferenceFrame actualTarget;
      if (offset == null) {
        actualTarget = target;
      } else {
        s_calculatePointAtHelperOffset.setParent(target);
        Matrix44 m = new Matrix44();
        m.m30 = offset.x;
        m.m31 = offset.y;
        m.m32 = offset.z;
        s_calculatePointAtHelperOffset.setLocalTransformation(m);
        actualTarget = s_calculatePointAtHelperOffset;
      }

      Matrix33 result;
      if (onlyAffectYaw) {
        // setup "helperA" with the orientation of "asSeenBy" and the
        // position of "this"
        s_calculatePointAtHelperA.setParent(asSeenBy);
        s_calculatePointAtHelperA.setLocalTransformation(new Matrix44());
        s_calculatePointAtHelperA.setPosition(Vector3.ZERO, this);

        // calculate the angle of rotation around y of "actualTarget" as
        // seen by "helperA"
        Vector3 targetPosition = actualTarget.getPosition(s_calculatePointAtHelperA);
        double targetTheta = Math.atan2(targetPosition.x, targetPosition.z);

        // place "helperB" out in front of "this"
        s_calculatePointAtHelperB.setParent(this);
        s_calculatePointAtHelperB.setPosition(MathUtilities.getZAxis(), this);

        // calculate the angle of rotation around Y of "helperB" as seen
        // by "helperA"
        Vector3 forwardPosition = s_calculatePointAtHelperB.getPosition(s_calculatePointAtHelperA);
        double forwardTheta = Math.atan2(forwardPosition.x, forwardPosition.z);

        // setup "helperB" to have position and orientation of "this"
        s_calculatePointAtHelperB.setLocalTransformation(new Matrix44());

        // calculate how much to rotate
        double deltaTheta = targetTheta - forwardTheta;

        // rotate "helperB" around Y as seen by "helperA"
        s_calculatePointAtHelperB.rotate(
            MathUtilities.getYAxis(), deltaTheta, s_calculatePointAtHelperA);

        // extract result
        result = s_calculatePointAtHelperB.getAxes(asSeenBy);

        // clean up
        s_calculatePointAtHelperA.setParent(null);
        s_calculatePointAtHelperB.setParent(null);
      } else {
        javax.vecmath.Vector3d targetPosition = actualTarget.getPosition(asSeenBy);
        javax.vecmath.Vector3d zAxis =
            MathUtilities.normalizeV(MathUtilities.subtract(targetPosition, position));
        javax.vecmath.Vector3d xAxis =
            MathUtilities.normalizeV(MathUtilities.crossProduct(upGuide, zAxis));
        if (Double.isNaN(xAxis.lengthSquared())) {
          xAxis.set(0, 0, 0);
          zAxis.set(0, 0, 0);
          // throw new RuntimeException(
          // "cannot calculate point at: zAxis=" + zAxis + " upGuide="
          // + upGuide );
        }
        javax.vecmath.Vector3d yAxis = MathUtilities.crossProduct(zAxis, xAxis);
        result = new Matrix33(xAxis, yAxis, zAxis);
      }

      if (offset == null) {
        s_calculatePointAtHelperOffset.setParent(null);
      }
      return result;
    }
  }