Platform discrepancy in Detector checksum computation

[MarkusFrankATcernch]

Separate issue: Problems in checksum computation.
Was discovered here: #1184
reason: new platform build in LCG

============================================================================================
Follow up:
============================================================================================
The latest dev3 nightlies are on CVMFS: /cvmfs/sft-nightlies.cern.ch/lcg/views/dev3/latest/
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I think I identified 2 entries, where the problem originates:
good:

DetectorChecksum       +++ Solid     ForwardLowZ_layer1_shape_0x562b922a1660_left    0x9d4f6c7c70c3eb3e
<subtraction lunit="mm" aunit="deg">
 <first ref="0x18cb06802b07fb40">
  3695612514963747814
  9487646648968612427
 </first>
 <second ref="0xd8e9f80287ed466d">
  2554733727480708909
  13351767629364974133
 </second>
</subtraction>
DetectorChecksum       +++ Solid     ForwardLowZ_layer1_shape_0x562b922a1660    0xee0f502c9edb95a8
<subtraction lunit="mm" aunit="deg">
 <first ref="0x9d4f6c7c70c3eb3e">
  3695612514963747814
  9487646648968612427
 </first>
 <second ref="0xd77e4dd72fb4348a">
  11005821857262182534
  8140283773950079902
 </second>
</subtraction>

bad (/cvmfs/sft-nightlies.cern.ch/lcg/views/dev3/latest/):

DetectorChecksum       +++ Solid     ForwardLowZ_layer1_shape_0x4f31340_left    0x86c662618750c673
<subtraction lunit="mm" aunit="deg">
 <first ref="0x18cb06802b07fb40">
  3695612514963747814
  9487646648968612427
 </first>
 <second ref="0xd8e9f80287ed466d">
  2554733727480708909
  9487646648968612427
 </second>
</subtraction>
DetectorChecksum       +++ Solid     ForwardLowZ_layer1_shape_0x4f31340    0xcad2ed1091a6deba
<subtraction lunit="mm" aunit="deg">
 <first ref="0x86c662618750c673">
  3695612514963747814
  9487646648968612427
 </first>
 <second ref="0xd77e4dd72fb4348a">
  11005821857262182534
  9487646648968612427
 </second>
</subtraction>

Unclear is where the difference comes from.
The problem is somewhere in the hashing of the rotations. However, the rotations are clearly different
and hence the hash-code should be different.

DetectorChecksum       +++ Rotation    13351767629364974133
<rotation unit="deg" x="0.000" y="-0.010" z="0.000"/>

and:

DetectorChecksum       +++ Rotation    8140283773950079902
<rotation unit="deg" x="0.000" y="0.010" z="0.000"/>

vs.

DetectorChecksum       +++ Rotation    9487646648968612427
<rotation unit="deg" x="0.000" y="0.000" z="0.000"/>

In the bad model the two rotations are claimed to be equal....
Are we here at the end running into some precision problem?
For the conversions I have set the precision to 3 digits.
Is it possible that due to precision AND deg<->rad the "0.010" got lost ?
Using the nightly does not tell, because there the positions and rotations cannot be not dumped.

[MarkusFrankATcernch]

10:59:36-frankm~/SW/DD4hep_head_dbg.root_vmaster.g4_11.00.b01_MT.G4_units/build$ cat diff.txt | grep -v "                       +++ Position"
+++ Position:   0x02fdf38a1354273a '<position unit="mm" x="0" y="0" z="-120"/>'			   <
												   >	+++ Position:   0x0be53ed0f3f3d508 '<position unit="mm" x="0" y="0" z="181"/>'
												   >	+++ Position:   0x0dc488e8706f0adc '<position unit="mm" x="0" y="0" z="51"/>'
												   >	+++ Position:   0x0f552d2174831283 '<position unit="mm" x="0" y="0" z="25"/>'
												   >	+++ Position:   0x109a47236b976c0f '<position unit="mm" x="0" y="0" z="-545"/>'
												   >	+++ Position:   0x122647140f6c1740 '<position unit="mm" x="0" y="0" z="-41"/>'
+++ Position:   0x148ec7d0f8dbeb7d '<position unit="mm" x="0" y="0" z="182"/>'			   <
+++ Position:   0x166e11e875572151 '<position unit="mm" x="0" y="0" z="52"/>'			   <
												   >	+++ Position:   0x16b8c4eebddc86f9 '<position unit="mm" x="0" y="0" z="49"/>'
+++ Position:   0x17e70d4ecc2db56b '<position unit="mm" x="0" y="0" z="610"/>'			   <
+++ Position:   0x1886df9985b446fc '<position unit="mm" x="0" y="0" z="-100"/>'			   <
+++ Position:   0x1935f02370737b88 '<position unit="mm" x="0" y="0" z="-544"/>'			   <
												   >	+++ Position:   0x1f24dae87a4a2ee2 '<position unit="mm" x="0" y="0" z="53"/>'
												   >	+++ Position:   0x1fa9364ed050faa4 '<position unit="mm" x="0" y="0" z="611"/>'
												   >	+++ Position:   0x213068998a9c5d71 '<position unit="mm" x="0" y="0" z="-103"/>'
+++ Position:   0x2566c7df978a44ea '<position unit="mm" x="0" y="0" z="248"/>'			   <
+++ Position:   0x2878282182825542 '<position unit="mm" x="0" y="0" z="26"/>'			   <
												   >	+++ Position:   0x32f3153dbf3db5e7 '<position unit="mm" x="0" y="0" z="-97"/>'
												   >	+++ Position:   0x336aba9995312537 '<position unit="mm" x="0" y="0" z="-105"/>'
+++ Position:   0x3ab51e3dc360c4c0 '<position unit="mm" x="0" y="0" z="-96"/>'			   <
												   >	+++ Position:   0x3af8a6dd6d3e3f7b '<position unit="mm" x="0" y="0" z="-181"/>'
												   >	+++ Position:   0x4c909f0b132b4f03 '<position unit="mm" x="0" y="0" z="-31"/>'
+++ Position:   0x4e35b8254ae3df3b '<position unit="mm" x="0" y="0" z="-62"/>'			   <
+++ Position:   0x541ba1dd7b3d823a '<position unit="mm" x="0" y="0" z="-182"/>'			   <
												   >	+++ Position:   0x55d9fd0918a64844 '<position unit="mm" x="0" y="0" z="15"/>'
+++ Position:   0x595f8595d86b75ec '<position unit="mm" x="0" y="0" z="116"/>'			   <
+++ Position:   0x5ea18a2553ef7149 '<position unit="mm" x="0" y="0" z="-60"/>'			   <
												   >	+++ Position:   0x62e24e95de0be9e1 '<position unit="mm" x="0" y="0" z="115"/>'
												   >	+++ Position:   0x728258dfc2f8fe87 '<position unit="mm" x="0" y="0" z="247"/>'
												   >	+++ Position:   0x7bfb38823d7e2a94 '<position unit="mm" x="0" y="0" z="-247"/>'
+++ Position:   0x858b2834d02b5831 '<position unit="mm" x="0" y="0" z="-82"/>'			   <
												   >	+++ Position:   0x8655e4d42df36ef9 '<position unit="mm" x="0" y="0" z="313"/>'
+++ Position:   0x8ebce0021b0d5f3f '<position unit="mm" x="0" y="0" z="-22"/>'			   <
												   >	+++ Position:   0x967f89021f317df8 '<position unit="mm" x="0" y="0" z="-23"/>'
+++ Position:   0x99a45e007b829ff7 '<position unit="mm" x="0" y="0" z="478"/>'			   <
+++ Position:   0xa0525fd43cab7bf8 '<position unit="mm" x="0" y="0" z="314"/>'			   <
												   >	+++ Position:   0xa2402700805ee5d0 '<position unit="mm" x="0" y="0" z="479"/>'
												   >	+++ Position:   0xb0f3fd15e22d397f '<position unit="mm" x="0" y="0" z="-413"/>'
+++ Position:   0xb66f818cefca2e03 '<position unit="mm" x="0" y="0" z="104"/>'			   <
+++ Position:   0xb8b6a615e6515838 '<position unit="mm" x="0" y="0" z="-412"/>'			   <
												   >	+++ Position:   0xbcf1e90952ccd880 '<position unit="mm" x="0" y="0" z="19"/>'
												   >	+++ Position:   0xc878c0e8492f30b4 '<position unit="mm" x="0" y="0" z="59"/>'
												   >	+++ Position:   0xd88144d1e62a3f62 '<position unit="mm" x="0" y="0" z="-313"/>'
+++ Position:   0xe0514dd1ea598b97 '<position unit="mm" x="0" y="0" z="-314"/>'			   <
+++ Position:   0xe424043d925c8e4a '<position unit="mm" x="0" y="0" z="-98"/>'			   <
+++ Position:   0xec96ad827d467505 '<position unit="mm" x="0" y="0" z="-248"/>'			   <
+++ Position:   0xed0717ef004e27c7 '<position unit="mm" x="0" y="0" z="412"/>'			   <
+++ Position:   0xedc4d60e7d1b4eab '<position unit="mm" x="0" y="0" z="544"/>'			   <
												   >	+++ Position:   0xf029d2764a53d243 '<position unit="mm" x="0" y="0" z="-611"/>'
												   >	+++ Position:   0xf122ab06a01885f3 '<position unit="mm" x="0" y="0" z="-479"/>'
												   >	+++ Position:   0xf238208d1168f116 '<position unit="mm" x="0" y="0" z="103"/>'
												   >	+++ Position:   0xf586ff0e813e93e4 '<position unit="mm" x="0" y="0" z="545"/>'
												   >	+++ Position:   0xf67ca0ef05e3a4a0 '<position unit="mm" x="0" y="0" z="413"/>'
+++ Position:   0xf7ebfb764e77177c '<position unit="mm" x="0" y="0" z="-610"/>'			   <
+++ Position:   0xf9bed406a4f56eec '<position unit="mm" x="0" y="0" z="-478"/>'			   <