/**
* Sets the up axis for this {@link ATransformable3D} object. If this is part of a scene graph,
* the graph will be notified of the change.
*
* @param x double The x component of the new up axis.
* @param y double The y component of the new up axis.
* @param z double The z component of the new up axis.
* @return A reference to this {@link ATransformable3D} to facilitate chaining.
*/
public ATransformable3D setUpAxis(double x, double y, double z) {
mUpAxis.setAll(x, y, z);
if (mLookAtEnabled && mLookAtValid) {
mOrientation.lookAt(mLookAt, mUpAxis);
markModelMatrixDirty();
}
return this;
}
/**
* Resets the up axis for this {@link ATransformable3D} object to the +Y axis. If this is part of
* a scene graph, the graph will be notified of the change.
*
* @return A reference to this {@link ATransformable3D} to facilitate chaining.
*/
public ATransformable3D resetUpAxis() {
mUpAxis.setAll(Vector3.getAxisVector(Vector3.Axis.Y));
if (mLookAtEnabled && mLookAtValid) {
mOrientation.lookAt(mLookAt, mUpAxis);
markModelMatrixDirty();
}
return this;
}
/**
* Resets the orientation of this {@link ATransformable3D} object to look at its look at target
* and use the specified {@link Vector3} as up. If this is part of a scene graph, the graph will
* be notified of the change.
*
* @param upAxis {@link Vector3} The direction to use as the up axis.
* @return A reference to this {@link ATransformable3D} to facilitate chaining.
*/
public ATransformable3D resetToLookAt(Vector3 upAxis) {
mTempVec.subtractAndSet(mLookAt, mPosition);
// In OpenGL, Cameras are defined such that their forward axis is -Z, not +Z like we have
// defined objects.
if (mIsCamera) mTempVec.inverse();
mOrientation.lookAt(mTempVec, upAxis);
mLookAtValid = true;
markModelMatrixDirty();
return this;
}