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/data/refman/pasoursint/CMSSW_5_3_0/src/DataFormats/GeometrySurface/src/BoundSpan.cc

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00001 #include "DataFormats/GeometrySurface/interface/BoundSpan.h"
00002 #include "DataFormats/GeometrySurface/interface/BoundSurface.h"
00003 #include "DataFormats/GeometrySurface/interface/TrapezoidalPlaneBounds.h"
00004 #include "DataFormats/GeometrySurface/interface/RectangularPlaneBounds.h"
00005 
00006 #include "DataFormats/GeometryVector/interface/VectorUtil.h"
00007 
00008 namespace boundSpan {
00009   
00010   void computeSpan(BoundSurface& plane) {
00011     typedef std::pair<float, float> return_type;  
00012     const TrapezoidalPlaneBounds* trapezoidalBounds( dynamic_cast<const TrapezoidalPlaneBounds*>(&(plane.bounds())));
00013     const RectangularPlaneBounds* rectangularBounds( dynamic_cast<const RectangularPlaneBounds*>(&(plane.bounds())));  
00014     
00015     Surface::GlobalPoint corners[8];
00016 
00017     if (trapezoidalBounds) {
00018       std::vector<float> const & parameters = (*trapezoidalBounds).parameters();
00019       
00020       float hbotedge = parameters[0];
00021       float htopedge = parameters[1];
00022       float hapothem = parameters[3];   
00023       float thickness =  (*trapezoidalBounds).thickness();
00024       
00025       corners[0] = plane.toGlobal( LocalPoint( -htopedge, hapothem,  thickness/2));
00026       corners[1] = plane.toGlobal( LocalPoint(  htopedge, hapothem,  thickness/2));
00027       corners[2] = plane.toGlobal( LocalPoint(  hbotedge, -hapothem, thickness/2));
00028       corners[3] = plane.toGlobal( LocalPoint( -hbotedge, -hapothem, thickness/2));
00029       corners[4] = plane.toGlobal( LocalPoint( -htopedge, hapothem,  -thickness/2));
00030       corners[5] = plane.toGlobal( LocalPoint(  htopedge, hapothem,  -thickness/2));
00031       corners[6] = plane.toGlobal( LocalPoint(  hbotedge, -hapothem, -thickness/2));
00032       corners[7] = plane.toGlobal( LocalPoint( -hbotedge, -hapothem, -thickness/2));
00033       
00034     }else if(rectangularBounds) {
00035       float length = rectangularBounds->length();
00036       float width  = rectangularBounds->width();   
00037       float thickness =  (*rectangularBounds).thickness();
00038       
00039       corners[0] = plane.toGlobal( LocalPoint( -width/2, -length/2, thickness/2));
00040       corners[1] = plane.toGlobal( LocalPoint( -width/2, +length/2, thickness/2));
00041       corners[2] = plane.toGlobal( LocalPoint( +width/2, -length/2, thickness/2));
00042       corners[3] = plane.toGlobal( LocalPoint( +width/2, +length/2, thickness/2));
00043       corners[4] = plane.toGlobal( LocalPoint( -width/2, -length/2, -thickness/2));
00044       corners[5] = plane.toGlobal( LocalPoint( -width/2, +length/2, -thickness/2));
00045       corners[6] = plane.toGlobal( LocalPoint( +width/2, -length/2, -thickness/2));
00046       corners[7] = plane.toGlobal( LocalPoint( +width/2, +length/2, -thickness/2));
00047     }else{  
00048       
00049     }
00050     
00051     float phimin = corners[0].barePhi(); float phimax = phimin;
00052     float zmin   = corners[0].z();    float zmax   = zmin;
00053     for ( int i = 1; i < 8; i++ ) {
00054       float cPhi = corners[i].barePhi();
00055       if ( Geom::phiLess( cPhi, phimin)) { phimin = cPhi; }
00056       if ( Geom::phiLess( phimax, cPhi)) { phimax = cPhi; }
00057       float z = corners[i].z();
00058       if ( z < zmin) zmin = z;
00059       if ( z > zmax) zmax = z;  
00060     }
00061     plane.m_zSpan.first    = zmin;
00062     plane.m_zSpan.second   = zmax;
00063     plane.m_phiSpan.first  = phimin;
00064     plane.m_phiSpan.second = phimax;
00065     
00066     
00067   }
00068   
00069   
00070 }