Import Geant4 9.2.0 source tree

source/geometry/solids/specific/src/G4PolyconeSide.cc

@@ -24,8 +24,8 @@
 // ********************************************************************
 //
 //
-// $Id: G4PolyconeSide.cc,v 1.17 2007/08/13 10:33:04 gcosmo Exp $
-// GEANT4 tag $Name: geant4-09-01 $
+// $Id: G4PolyconeSide.cc,v 1.19 2008/05/15 11:41:59 gcosmo Exp $
+// GEANT4 tag $Name: geant4-09-02 $
 //
 // 
 // --------------------------------------------------------------------
@@ -46,6 +46,8 @@
 #include "G4SolidExtentList.hh"
 #include "G4GeometryTolerance.hh"
 
+#include "Randomize.hh"
+
 //
 // Constructor
 //
@@ -63,6 +65,7 @@ G4PolyconeSide::G4PolyconeSide( const G4PolyconeSideRZ *prevRZ,
   : ncorners(0), corners(0)
 {
   kCarTolerance = G4GeometryTolerance::GetInstance()->GetSurfaceTolerance();
+  fSurfaceArea = 0.0;
 
   //
   // Record values
@@ -210,6 +213,7 @@ void G4PolyconeSide::CopyStuff( const G4PolyconeSide &source )
   allBehind  = source.allBehind;
 
   kCarTolerance = source.kCarTolerance;
+  fSurfaceArea = source.fSurfaceArea;
   
   cone    = new G4IntersectingCone( *source.cone );
   
@@ -1043,3 +1047,51 @@ void G4PolyconeSide::FindLineIntersect( G4double x1,  G4double y1,
   x = 0.5*( x1+s1*tx1 + x2+s2*tx2 );
   y = 0.5*( y1+s1*ty1 + y2+s2*ty2 );
 }
+
+//
+// Calculate surface area for GetPointOnSurface()
+//
+G4double G4PolyconeSide::SurfaceArea() 
+{ 
+  if(fSurfaceArea==0)
+  {
+    fSurfaceArea = (r[0]+r[1])* std::sqrt(sqr(r[0]-r[1])+sqr(z[0]-z[1]));
+    fSurfaceArea *= 0.5*(deltaPhi);
+  }  
+  return fSurfaceArea;
+}
+
+//
+// GetPointOnFace
+//
+G4ThreeVector G4PolyconeSide::GetPointOnFace()
+{
+  G4double x,y,zz;
+  G4double rr,phi,dz,dr;
+  dr=r[1]-r[0];dz=z[1]-z[0];
+  phi=startPhi+deltaPhi*G4UniformRand();
+  rr=r[0]+dr*G4UniformRand();
+ 
+  x=rr*std::cos(phi);
+  y=rr*std::sin(phi);
+
+  // PolyconeSide has a Ring Form
+  //
+  if (dz==0.)
+  {
+    zz=z[0];
+  }
+  else
+  {
+    if(dr==0.)  // PolyconeSide has a Tube Form
+    {
+      zz = z[0]+dz*G4UniformRand();
+    }
+    else
+    {
+      zz = z[0]+(rr-r[0])*dz/dr;
+    }
+  }
+
+  return G4ThreeVector(x,y,zz);
+}