VarMake detector_distance Float User
VarMake detector_base Float User
VarMake slit4_distance Float User
VarMake slit4_base Float User
VarMake sample_distance Float User
VarMake sample_base Float User
VarMake slit3_distance Float User
VarMake slit3_base Float User

detector_distance 10000
detector_base 300
slit4_distance 6000
slit4_base 20
sample_distance 5800
sample_base 50
slit3_distance 5600
slit3_base 20

proc set_two_theta { arg } {
  set d1 [expr [SplitReply [detector_distance]] - [SplitReply [sample_distance]]]
  set d2 [expr [SplitReply [slit4_distance]] - [SplitReply [sample_distance]]]
  set h1 [expr [SplitReply [detector_base]] + $d1 * tan($arg)]
  set h2 [expr [SplitReply [slit4_base]] + $d2 * tan($arg)]
  return "dz=$h1,st4vt=$h2"
}
publish set_two_theta user

proc get_two_theta {} {
  set d1 [expr [SplitReply [detector_distance]] - [SplitReply [sample_distance]]]
  set h1 [expr [SplitReply [dz]] - [SplitReply [detector_base]]]
  return [expr atan2($h1, $d1)]
}
publish get_two_theta user

MakeConfigurableMotor two_theta
two_theta readscript get_two_theta
two_theta drivescript set_two_theta