//
//	Autor: Matthias Huether (huether@dfki.uni-sb.de)
//
//
//      Beschreibung: Funktionen fuer das Rechnen mit Transformationsmatrizen
//
//	ergaenzendes Modul: matrix.cc
//  letzte Änderung 01.09.199, Jens Ahrensfeld

#ifndef MATRIX_H
#define MATRIX_H

#include "ri.h"

extern void PrintMatrix(RtMatrix,short);
extern void PrintVector(RtFloat*,short);
extern RtFloat ScalarProduct(RtFloat*,RtFloat*,short);
extern RtFloat Norm(RtFloat*,short);
extern RtFloat AngleBetweenVectors(RtFloat*,RtFloat*,short);
extern void IdentityMatrix(RtMatrix*);
extern void MultiplyMatrices(RtMatrix,RtMatrix,RtMatrix*);
extern void MultiplyMatrixVector(RtMatrix,RtFloat*,RtFloat*);
extern void MultiplyMatrixVector2(RtMatrix M, RtFloat *u, RtFloat *Mu, UINT32 du);

extern void MultiplyVectorMatrix(RtFloat*,RtMatrix,RtFloat*);
extern void TransposeMatrix(RtMatrix,RtMatrix*);
extern void NewTranslationMatrix(RtFloat*,RtMatrix*);
extern void RotationMatrix(RtMatrix,RtMatrix*,short);
extern void TranslationMatrix(RtMatrix,RtMatrix*);
extern void InverseRotationMatrix(RtMatrix,RtMatrix*);
extern void InverseTranslationMatrix(RtMatrix,RtMatrix*);
extern void InverseMatrix(RtMatrix,RtMatrix*);
extern void BuildTransformationMatrix(RtFloat*,RtFloat*,RtFloat,RtMatrix*);

// added 01.09.1999
extern void AimCamera(RtFloat*,RtFloat*,RtFloat,RtMatrix*);

void PointCopy(RtFloat *pDst, RtFloat *pSrc);
void PointSwapXY(RtFloat *pSrcDst);
void PointSwapXZ(RtFloat *pSrcDst);
void PointSwapYZ(RtFloat *pSrcDst);

#endif