function Win2WorldX takes real X, real Y, real Range returns real
    return GetCameraEyePositionX()+.AxisZ.x*Range+X*.AxisX.x*WidthScreen*Range+Y*.AxisY.x*HeightScreen*Range
endfunction

function Win2WorldY takes real X, real Y, real Range returns real
    return GetCameraEyePositionY()+.AxisZ.y*Range+X*.AxisX.y*WidthScreen*Range+Y*.AxisY.y*HeightScreen*Range
endfunction

function Win2WorldZ takes real X, real Y, real Range returns real
    return GetCameraEyePositionZ()+.AxisZ.z*Range+X*.AxisX.z*WidthScreen*Range+Y*.AxisY.z*HeightScreen*Range
endfunction