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/* RCSid $Id$ */
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/*
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* Definitions for 4x4 matrix operations
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*/
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#include "copyright.h"
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#include "fvect.h"
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typedef FLOAT MAT4[4][4];
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#ifdef BSD
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#define copymat4(m4a,m4b) bcopy((char *)m4b,(char *)m4a,sizeof(MAT4))
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#else
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#define copymat4(m4a,m4b) (void)memcpy((char *)m4a,(char *)m4b,sizeof(MAT4))
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#endif
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#define MAT4IDENT { {1.,0.,0.,0.}, {0.,1.,0.,0.}, \
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{0.,0.,1.,0.}, {0.,0.,0.,1.} }
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extern MAT4 m4ident;
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#define setident4(m4) copymat4(m4, m4ident)
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#ifdef NOPROTO
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extern void multmat4();
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extern void multv3();
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extern void multp3();
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extern int invmat4();
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#else
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extern void multmat4(MAT4 m4a, MAT4 m4b, MAT4 m4c);
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extern void multv3(FVECT v3a, FVECT v3b, MAT4 m4);
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extern void multp3(FVECT p3a, FVECT p3b, MAT4 m4);
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extern int invmat4(MAT4 inverse, MAT4 mat);
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#endif
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