#ifndef ALIFMDSURVEYTOALIGNOBJS_H
#define ALIFMDSURVEYTOALIGNOBJS_H
#include <AliSurveyToAlignObjs.h>
+#include <TGeoMatrix.h>
// Forward decl
class TVector3;
+class TGeoMatrix;
+/**
+ * Class to take survey data and transform that to alignment objects.
+ *
+ */
class AliFMDSurveyToAlignObjs : public AliSurveyToAlignObjs
{
public:
- AliFMDSurveyToAlignObjs() : AliSurveyToAlignObjs() {}
+ /**
+ * Constructor
+ *
+ */
+ AliFMDSurveyToAlignObjs() : AliSurveyToAlignObjs(),
+ fFMD1Delta(0),
+ fFMD2Delta(0) {}
+ /**
+ * Run the task.
+ *
+ */
void Run();
- Bool_t CreateAlignObjs() { return kTRUE; }
+ /**
+ *
+ * Method to create the alignment objects
+ *
+ * @return @c true on success, @c false otherwise
+ */
+ Bool_t CreateAlignObjs();
+
+
+ TClonesArray* GetAlignObjArray() const { return fAlignObjArray; }
+
protected:
+ /**
+ * Do the FMD1 analysis. We have 4 survey targets on V0-A on the
+ * C-side. These are
+ *
+ * - V0A_ICT In-side, C-side, top.
+ * - V0A_ICB In-side, C-side, bottom.
+ * - V0A_OCT Out-side, C-side, top.
+ * - V0A_OCB Out-side, C-side, bottom.
+ *
+ * These 4 survey targets sit 3.3mm over the V0-A C-side surface, or
+ * 3.3mm over the back surface of FMD1.
+ *
+ * Since these are really sitting on a plane, we can use the method
+ * proposed by the CORE offline.
+ *
+ * @return @c true on success, @c false otherwise.
+ */
Bool_t DoFMD1();
+ /**
+ * Get the FMD1 plane from the survey points
+ *
+ * @param rot Rotation matrix (direction cosines)
+ * @param trans Translation
+ *
+ * @return @c true on success, @c false otherwise.
+ */
Bool_t GetFMD1Plane(Double_t* rot, Double_t* trans) const;
+ /**
+ * Do the FMD2 calculations. We have 6 survey points of which only
+ * 5 are normally surveyed. These are all sittings
+ *
+ * - FMD2_ITOP - In-side, top
+ * - FMD2_IBOTM - In-side, middle bottom
+ * - FMD2_IBOT - In-side, bottom
+ * - FMD2_OTOP - Out-side, top
+ * - FMD2_OBOTM - Out-side, middle bottom
+ * - FMD2_OBOT - Out-side, bottom
+ *
+ * The nominal coordinates of these retro-fitted survey stickers
+ * isn't known. Also, these stickers are put on a thin (0.3mm
+ * thick) carbon cover which flexes quite easily. This means, that
+ * to rotations and xy-translation obtained from the survey data
+ * cannot be used, and left is only the z-translation.
+ *
+ * Further more, since FMD2 to is attached to the ITS SPD thermal
+ * screen, it is questionable if the FMD2 survey will ever be used.
+ *
+ * @return @c true on success, @c false otherwise.
+ */
Bool_t DoFMD2();
+ /**
+ * Get the surveyed plane corresponding to the backside of FMD2.
+ * The plane is done as a best fit of the plane equation to at least
+ * 4 of the available survey points.
+ *
+ * @param rot Rotation matrix (direction cosines)
+ * @param trans Translation vector.
+ *
+ * @return @c true on success, @c false otherwise
+ */
Bool_t GetFMD2Plane(Double_t* rot, Double_t* trans) const;
-
+ /**
+ * Get the factor to translate current coordinates to the canonical
+ * unit (centi-meters).
+ *
+ * @return Conversion factor
+ */
Double_t GetUnitFactor() const;
+ /**
+ * Get the coordinates of a survey point (if available).
+ *
+ * @param name Name of the survey point.
+ * @param p Coordinates.
+ * @param e Error on the measurement.
+ *
+ * @return @c true if the survey data is available, @c false otherwise.
+ */
Bool_t GetPoint(const char* name, TVector3& p, TVector3& e) const;
+ /**
+ * Calculate the plane translation and rotation from 3 survey points
+ *
+ * @param a 1st Survey point
+ * @param b 2nd Survey point
+ * @param c 3rd Survey point
+ * @param trans Translation vector
+ * @param rot Rotation matrix (direction cosines)
+ *
+ * @return
+ */
Bool_t CalculatePlane(const TVector3& a,
const TVector3& b,
- const TVector3& c,
+ const TVector3& c,
+ Double_t depth,
Double_t* trans,
Double_t* rot) const;
+ /**
+ * Calculate the plane rotation and translation by doing a fit of
+ * the plane equation to the surveyed points. At least 4 points
+ * must be passed in the @a points array with corresponding errors
+ * in the array @a errors. The arrays are assumed to contain
+ * TVector3 objects.
+ *
+ * @param points Array surveyed positions
+ * @param errors Array of errors corresponding to @a points
+ * @param depth Survey targets depth (perpendicular to the plane)
+ * @param trans On return, translation of the plane
+ * @param rot On return, rotation (direction cosines) of the plane
+ *
+ * @return @c true on success, @c false otherwise
+ */
+ Bool_t FitPlane(const TObjArray& points,
+ const TObjArray& errors,
+ Double_t depth,
+ Double_t* trans,
+ Double_t* rot) const;
+ /**
+ * Create a delta transform from a global rotation matrix and
+ * translation.
+ *
+ * @param global Global matrix of element to transform.
+ * @param rot Rotation matrix (direction cosines)
+ * @param trans Translation
+ * @param delta On return, the delta transform
+ *
+ * @return Newly
+ */
+ Bool_t MakeDelta(const TGeoMatrix* global,
+ const Double_t* rot,
+ const Double_t* trans,
+ TGeoHMatrix& delta) const;
+ /**
+ * Create a delta transform from a global rotation matrix and
+ * translation.
+ *
+ * @param path Path of element to transform.
+ * @param rot Rotation matrix (direction cosines)
+ * @param trans Translation
+ * @param delta On return, the delta transform
+ *
+ * @return Newly
+ */
+ Bool_t MakeDelta(const char* path,
+ const Double_t* rot,
+ const Double_t* trans,
+ TGeoHMatrix& delta) const;
+ /**
+ * Service member function to print a vector
+ *
+ * @param text Prefix text
+ * @param v Vector (array of 3 doubles)
+ */
static void PrintVector(const char* text, const Double_t* v);
+ /**
+ * Service member function to print a vector
+ *
+ * @param text Prefix text
+ * @param v Vector
+ */
static void PrintVector(const char* text, const TVector3& v);
+ /**
+ * Service member function to print a rotation matrix
+ *
+ * @param text Prefix text
+ * @param v Matrix (array of 9 doubles)
+ */
static void PrintRotation(const char* text, const Double_t* rot);
+ TGeoHMatrix fFMD1Delta; // FMD1 delta transform
+ TGeoHMatrix fFMD2Delta; // FMD2 delta transform
ClassDef(AliFMDSurveyToAlignObjs,0) // Convert FMD survey to alignments
};
git://git.uio.no / u / mrichter / AliRoot.git / blobdiff