mirror of
https://github.com/DrBeef/Raze.git
synced 2024-11-15 00:41:55 +00:00
78 lines
3.3 KiB
C
78 lines
3.3 KiB
C
/*
|
|
** SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
|
|
** Copyright (C) [dates of first publication] Silicon Graphics, Inc.
|
|
** All Rights Reserved.
|
|
**
|
|
** Permission is hereby granted, free of charge, to any person obtaining a copy
|
|
** of this software and associated documentation files (the "Software"), to deal
|
|
** in the Software without restriction, including without limitation the rights
|
|
** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
|
|
** of the Software, and to permit persons to whom the Software is furnished to do so,
|
|
** subject to the following conditions:
|
|
**
|
|
** The above copyright notice including the dates of first publication and either this
|
|
** permission notice or a reference to http://oss.sgi.com/projects/FreeB/ shall be
|
|
** included in all copies or substantial portions of the Software.
|
|
**
|
|
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
|
|
** INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
|
|
** PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL SILICON GRAPHICS, INC.
|
|
** BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
|
|
** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE
|
|
** OR OTHER DEALINGS IN THE SOFTWARE.
|
|
**
|
|
** Except as contained in this notice, the name of Silicon Graphics, Inc. shall not
|
|
** be used in advertising or otherwise to promote the sale, use or other dealings in
|
|
** this Software without prior written authorization from Silicon Graphics, Inc.
|
|
*/
|
|
/*
|
|
** Author: Eric Veach, July 1994.
|
|
*/
|
|
|
|
#ifndef GEOM_H
|
|
#define GEOM_H
|
|
|
|
#include "mesh.h"
|
|
|
|
#ifdef NO_BRANCH_CONDITIONS
|
|
/* MIPS architecture has special instructions to evaluate boolean
|
|
* conditions -- more efficient than branching, IF you can get the
|
|
* compiler to generate the right instructions (SGI compiler doesn't)
|
|
*/
|
|
#define VertEq(u,v) (((u)->s == (v)->s) & ((u)->t == (v)->t))
|
|
#define VertLeq(u,v) (((u)->s < (v)->s) | \
|
|
((u)->s == (v)->s & (u)->t <= (v)->t))
|
|
#else
|
|
#define VertEq(u,v) ((u)->s == (v)->s && (u)->t == (v)->t)
|
|
#define VertLeq(u,v) (((u)->s < (v)->s) || ((u)->s == (v)->s && (u)->t <= (v)->t))
|
|
#endif
|
|
|
|
#define EdgeEval(u,v,w) tesedgeEval(u,v,w)
|
|
#define EdgeSign(u,v,w) tesedgeSign(u,v,w)
|
|
|
|
/* Versions of VertLeq, EdgeSign, EdgeEval with s and t transposed. */
|
|
|
|
#define TransLeq(u,v) (((u)->t < (v)->t) || ((u)->t == (v)->t && (u)->s <= (v)->s))
|
|
#define TransEval(u,v,w) testransEval(u,v,w)
|
|
#define TransSign(u,v,w) testransSign(u,v,w)
|
|
|
|
|
|
#define EdgeGoesLeft(e) VertLeq( (e)->Dst, (e)->Org )
|
|
#define EdgeGoesRight(e) VertLeq( (e)->Org, (e)->Dst )
|
|
#define EdgeIsInternal(e) e->Rface && e->Rface->inside
|
|
|
|
#define ABS(x) ((x) < 0 ? -(x) : (x))
|
|
#define VertL1dist(u,v) (ABS(u->s - v->s) + ABS(u->t - v->t))
|
|
|
|
#define VertCCW(u,v,w) tesvertCCW(u,v,w)
|
|
|
|
int tesvertLeq( TESSvertex *u, TESSvertex *v );
|
|
TESSreal tesedgeEval( TESSvertex *u, TESSvertex *v, TESSvertex *w );
|
|
TESSreal tesedgeSign( TESSvertex *u, TESSvertex *v, TESSvertex *w );
|
|
TESSreal testransEval( TESSvertex *u, TESSvertex *v, TESSvertex *w );
|
|
TESSreal testransSign( TESSvertex *u, TESSvertex *v, TESSvertex *w );
|
|
int tesvertCCW( TESSvertex *u, TESSvertex *v, TESSvertex *w );
|
|
void tesedgeIntersect( TESSvertex *o1, TESSvertex *d1, TESSvertex *o2, TESSvertex *d2, TESSvertex *v );
|
|
int tesedgeIsLocallyDelaunay( TESShalfEdge *e );
|
|
|
|
#endif
|