Method update

Source/Falcor/Scene/Camera/CameraController.cpp:114–133

    }

    bool OrbiterCameraController::update()
    {
        if(mpCamera && mbDirty)
        {
            mbDirty = false;
            mShouldRotate = false;
            mpCamera->setTarget(mModelCenter);

            float3 camPos = mModelCenter;
            // tdavidovic: Why do we multiply the rotation matrix from the left (i.e., as if we multiplied by a transpose?)
            camPos += mul(float3(0,0,1), mRotation) * mModelRadius * mCameraDistance;
            mpCamera->setPosition(camPos);

            float3 up(0, 1, 0);
            up = mul(up, mRotation);
            mpCamera->setUpVector(up);
            return true;
        }
        return false;
    }

    void OrbiterCameraController::resetInputState()
    {