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Diffstat (limited to 'src/glu/sgi/libnurbs/internals/trimline.cc')
| -rw-r--r-- | src/glu/sgi/libnurbs/internals/trimline.cc | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/src/glu/sgi/libnurbs/internals/trimline.cc b/src/glu/sgi/libnurbs/internals/trimline.cc deleted file mode 100644 index 61f34cd38a0..00000000000 --- a/src/glu/sgi/libnurbs/internals/trimline.cc +++ /dev/null @@ -1,223 +0,0 @@ -/* -** License Applicability. Except to the extent portions of this file are -** made subject to an alternative license as permitted in the SGI Free -** Software License B, Version 1.1 (the "License"), the contents of this -** file are subject only to the provisions of the License. You may not use -** this file except in compliance with the License. You may obtain a copy -** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 -** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: -** -** http://oss.sgi.com/projects/FreeB -** -** Note that, as provided in the License, the Software is distributed on an -** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS -** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND -** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A -** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. -** -** Original Code. The Original Code is: OpenGL Sample Implementation, -** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, -** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. -** Copyright in any portions created by third parties is as indicated -** elsewhere herein. All Rights Reserved. -** -** Additional Notice Provisions: The application programming interfaces -** established by SGI in conjunction with the Original Code are The -** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released -** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version -** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X -** Window System(R) (Version 1.3), released October 19, 1998. This software -** was created using the OpenGL(R) version 1.2.1 Sample Implementation -** published by SGI, but has not been independently verified as being -** compliant with the OpenGL(R) version 1.2.1 Specification. -*/ - -/* - * trimline.c++ - * - */ - -#include "glimports.h" -#include "myassert.h" -#include "mystdio.h" -#include "trimline.h" -#include "backend.h" - -Trimline::Trimline() -{ - size = 0; pts = 0; numverts = 0; - tinterp = &t; binterp = &b; -} - -Trimline::~Trimline() -{ - if( pts ) delete[] pts; -} - -void -Trimline::init( TrimVertex *v ) -{ - reset(); - grow(1); - append(v); -} - -inline void -Trimline::grow( long npts ) -{ - if( size < npts ) { - size = 2 * npts; - if( pts ) delete[] pts; - pts = new TrimVertex_p[size]; - } -} - -inline void -Trimline::append( TrimVertex *v ) -{ - assert( numverts != size ); - pts[numverts++] = v; -} - -void -Trimline::init( long npts, Arc_ptr jarc, long last ) -{ - jarcl.init( jarc, 0, last ); - grow( npts + 2 ); -} - -inline void -Trimline::swap() -{ - TrimVertex *tmp=tinterp; - tinterp=binterp; - binterp=tmp; -} - -void -Trimline::getNextPt() -{ - *binterp = *jarcl.getnextpt(); -} - -void -Trimline::getPrevPt() -{ - *binterp = *jarcl.getprevpt(); -} - -/*---------------------------------------------------------------------- - * getNextPts - make arrays of pointers to trim points on left and right - * hulls of trim strip. - *---------------------------------------------------------------------- - */ -void -Trimline::getNextPts( REAL vval, Backend& backend ) -{ - reset(); swap(); append( tinterp ); - assert( tinterp->param[1] >= vval ); - - register TrimVertex *p; - for( p=jarcl.getnextpt() ; p->param[1] >= vval; p=jarcl.getnextpt() ) { - append( p ); - } - - /* compute and copy pointer to final point on left hull */ - if( interpvert( last(), p, binterp, vval ) ) { - binterp->nuid = p->nuid; - backend.triangle( p, binterp, last() ); - append( binterp ); - } - jarcl.reverse(); - (void) jarcl.getprevpt(); /* reset jarcl to proper position */ - jarcl.reverse(); -} - -void -Trimline::getPrevPts( REAL vval, Backend& backend ) -{ - reset(); swap(); append( tinterp ); - assert( tinterp->param[1] >= vval ); - - register TrimVertex *q; - for( q=jarcl.getprevpt(); q->param[1] >= vval; q=jarcl.getprevpt() ) { - append( q ); - } - - /* compute and copy pointer to final point on right hull */ - if( interpvert( q, last(), binterp, vval ) ) { - binterp->nuid = q->nuid; - backend.triangle( last(), binterp, q ); - append( binterp ); - } - jarcl.reverse(); - (void) jarcl.getnextpt(); /* reset jarcl to proper position */ - jarcl.reverse(); -} - -void -Trimline::getNextPts( Arc_ptr botarc ) -{ - reset(); swap(); append( tinterp ); - -#ifndef NDEBUG - PwlArc *lastpwl = botarc->prev->pwlArc; - TrimVertex *lastpt1 = &lastpwl->pts[lastpwl->npts-1]; -#endif - TrimVertex *lastpt2 = botarc->pwlArc->pts; - register TrimVertex *p = jarcl.getnextpt(); - for( append( p ); p != lastpt2; append( p ) ) { - assert( p != lastpt1 ); - p = jarcl.getnextpt(); - } -} - -void -Trimline::getPrevPts( Arc_ptr botarc ) -{ - reset(); swap(); append( tinterp ); - - PwlArc *lastpwl = botarc->prev->pwlArc; - TrimVertex *lastpt1 = &lastpwl->pts[lastpwl->npts-1]; -#ifndef NDEBUG - TrimVertex *lastpt2 = botarc->pwlArc->pts; -#endif - - register TrimVertex *q = jarcl.getprevpt(); - for( append( q ); q != lastpt1; append( q ) ) { - assert( q != lastpt2 ); - q = jarcl.getprevpt(); - } -} - - -long -Trimline::interpvert( TrimVertex *a, TrimVertex *b, TrimVertex *c, REAL vval ) -{ - REAL denom = a->param[1] - b->param[1]; - - if(denom != 0) { - if( vval == a->param[1] ) { - c->param[0] = a->param[0]; - c->param[1] = a->param[1]; - c->nuid = a->nuid; - return 0; - } else if( vval == b->param[1] ) { - c->param[0] = b->param[0]; - c->param[1] = b->param[1]; - c->nuid = b->nuid; - return 0; - } else { - REAL r = (a->param[1] - vval)/denom; - c->param[0] = a->param[0] - r * (a->param[0] - b->param[0]); - c->param[1] = vval; - return 1; - } - } else { - c->param[0] = a->param[0]; - c->param[1] = a->param[1]; - c->nuid = a->nuid; - return 0; - } -} - |