def _c2x(self, c):
return <NUM_LIT:0.5> * (self.window[<NUM_LIT:0>] + self.window[<NUM_LIT:1>] +<EOL>c * (self.window[<NUM_LIT:1>] - self.window[<NUM_LIT:0>]))<EOL>
Convert cheb coordinates to windowdow coordinates