/// <summary>
/// Gives the r-theta parameterization of the point on the touchpad that
/// the user is touching.
/// </summary>
/// <param name="deviceIndex">The index of the controller</param>
/// <param name="r">the radius [0,1]</param>
/// <param name="theta">the angle made with the x-axis</param>
protected void getViveTouchpadPoint(uint deviceIndex, out float r, out float theta)
{
VRControllerState_t controllerState = new VRControllerState_t();
VRControllerAxis_t axis = new VRControllerAxis_t();
unsafe
{
mScene.mHMD.GetControllerState(deviceIndex, ref controllerState, (uint)sizeof(VRControllerState_t));
}
axis = controllerState.rAxis0;
r = (float)Math.Sqrt(axis.x * axis.x + axis.y * axis.y);
if (r > 0)
{
theta = (float)Math.Atan2(axis.y / r, axis.x / r); // TODO: Remove divisions?
}
else
{
theta = 0;
}
}
public static void ToVector2(ref VRControllerAxis_t axis, out Vector2 result)
{
result.X = axis.x;
result.Y = axis.y;
}
public static Vector2 AsVector(this VRControllerAxis_t axis)
{
return(new Vector2(axis.x, axis.y));
}
private Vector2 ControllerAxisToVector2(VRControllerAxis_t axis)
{
return(new Vector2(axis.x, axis.y));
}
