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/* RCSid $Id: tmesh.h,v 2.6 2021/04/13 15:13:20 greg Exp $ */
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/*
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* Header file for triangle mesh routines using barycentric coordinates
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* Include after "fvect.h"
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*/
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#ifndef _RAD_TMESH_H_
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#define _RAD_TMESH_H_
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#ifdef __cplusplus
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extern "C" {
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#endif
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#define TCALNAME "tmesh.cal" /* the name of our auxiliary file */
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typedef struct {
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int ax; /* major axis */
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RREAL tm[2][3]; /* transformation */
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} BARYCCM;
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#ifndef COSTOL
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#define COSTOL 0.999995 /* cosine of tolerance for smoothing */
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#endif
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/* flat_tri() return values */
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#define ISBENT 0 /* is not flat */
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#define ISFLAT 1 /* is flat */
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#define RVBENT 2 /* reversed and not flat */
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#define RVFLAT 3 /* reversed and flat */
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#define DEGEN -1 /* degenerate (zero area) */
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extern int flat_tri(FVECT v1, FVECT v2, FVECT v3,
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FVECT n1, FVECT n2, FVECT n3);
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extern int comp_baryc(BARYCCM *bcm, FVECT v1, FVECT v2, FVECT v3);
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extern void eval_baryc(RREAL wt[3], FVECT p, BARYCCM *bcm);
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extern int get_baryc(RREAL wt[3], FVECT p, FVECT v1, FVECT v2, FVECT v3);
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extern void fput_baryc(BARYCCM *bcm, RREAL com[][3], int n, FILE *fp);
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#ifdef __cplusplus
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}
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#endif
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#endif /* _RAD_TMESH_H_ */
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