Thicknesses definitions in BarrelPlanarMPGDTracker_geo

[veprbl]

Okay, maybe we can delete this code altogether, because I don't think these values are used at all. I had to bring it up because it was hard to tell how correct your calculation is correct. If you agree, we can remove either in this PR or in a follow up.

Originally posted by @veprbl in #1014 (comment)

This refers to lines

epic/src/BarrelPlanarMPGDTracker_geo.cpp

Lines 217 to 236 in 0963404

	// Compute the inner (i.e. thickness until mid-sensitive-volume) and
	// outer (from mid-sensitive-volume to top)
	// thicknesses that need to be assigned to the tracking surface
	// depending on wether the support is above or below the sensor.
	double inner_thickness, outer_thickness;
	if (sensitiveVolumeSet == 1) {
	inner_thickness = thickness_so_far + comp_thickness / 2;
	outer_thickness = total_thickness - thickness_so_far - comp_thickness / 2;
	} else if (nSensitives == 0) {
	inner_thickness = thickness_so_far + comp_thickness / 2;
	outer_thickness = comp_thickness / 2;
	} else if (nSensitives == 4) {
	inner_thickness = comp_thickness / 2;
	outer_thickness = total_thickness - thickness_so_far - comp_thickness / 2;
	} else {
	inner_thickness = outer_thickness = comp_thickness / 2;
	}
	printout(DEBUG, "BarrelPlanarMPGDTracker_geo", "Sensitive surface @ R = %.4f (%.4f,%.4f) cm",
	(thickness_sum + comp_thickness / 2) / cm, inner_thickness / cm,
	outer_thickness / cm);

which we don't believe these values are used, and I can't tell if the values calculated correctly.

[veprbl]

cc @ybedfer