Import Geant4 11.4.0.beta source tree

2025-06-26 09:17:29 +02:00
parent 20a218bbe1
commit a499fb82e9
1941 changed files with 203285 additions and 95593 deletions
@@ -31,13 +31,13 @@
 #include "G4Types.hh"
 #include <cstdint>

-inline G4double G4QuickRand()
+inline G4double G4QuickRand(uint32_t seed = 0)
 {
-  static const G4double f = 1. / 4294967296.;  // 2^-32
+  static const G4double f = 1. / 4294967296.; // 2^-32

  // Algorithm "xor" from p.4 of G.Marsaglia, "Xorshift RNGs"
  static G4ThreadLocal uint32_t y = 2463534242;
-  uint32_t x                      = y;
+  uint32_t x = uint32_t(seed == 0) * y + seed;
  x ^= x << 13;
  x ^= x >> 17;
  x ^= x << 5;