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* SGI FREE SOFTWARE LICENSE B (Version 2.0, Sept. 18, 2008)
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* Copyright (C) 1991-2000 Silicon Graphics, Inc. All Rights Reserved.
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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* The above copyright notice including the dates of first publication and
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* either this permission notice or a reference to
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* http://oss.sgi.com/projects/FreeB/
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* shall be included in all copies or substantial portions of the Software.
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* SILICON GRAPHICS, INC. BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF
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* OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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* Except as contained in this notice, the name of Silicon Graphics, Inc.
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* shall not be used in advertising or otherwise to promote the sale, use or
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* other dealings in this Software without prior written authorization from
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* Silicon Graphics, Inc.
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#ifndef __glubackend_h_
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#define __glubackend_h_
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#include "trimvertex.h"
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#include "gridvertex.h"
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#include "gridtrimvertex.h"
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class BasicCurveEvaluator;
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class BasicSurfaceEvaluator;
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BasicCurveEvaluator& curveEvaluator;
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BasicSurfaceEvaluator& surfaceEvaluator;
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Backend( BasicCurveEvaluator &c, BasicSurfaceEvaluator& e )
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: curveEvaluator(c), surfaceEvaluator(e) {}
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/* surface backend routines */
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void bgnsurf( int, int, long );
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void patch( REAL, REAL, REAL, REAL );
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void surfpts( long, REAL *, long, long, int, int,
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REAL, REAL, REAL, REAL );
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void surfbbox( long, REAL *, REAL * );
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void surfgrid( REAL, REAL, long, REAL, REAL, long );
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void surfmesh( long, long, long, long );
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void bgntmesh( const char * );
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void endtmesh( void );
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void swaptmesh( void );
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void tmeshvert( GridTrimVertex * );
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void tmeshvert( TrimVertex * );
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void tmeshvert( GridVertex * );
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void tmeshvert( REAL u, REAL v );
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void linevert( TrimVertex * );
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void linevert( GridVertex * );
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void bgnoutline( void );
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void endoutline( void );
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void triangle( TrimVertex*, TrimVertex*, TrimVertex* );
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void evalUStrip(int n_upper, REAL v_upper, REAL* upper_val,
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int n_lower, REAL v_lower, REAL* lower_val
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void evalVStrip(int n_left, REAL u_left, REAL* left_val,
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int n_right, REAL v_right, REAL* right_val
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void tmeshvertNOGE(TrimVertex *t);
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void tmeshvertNOGE_BU(TrimVertex *t);
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void tmeshvertNOGE_BV(TrimVertex *t);
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void preEvaluateBU(REAL u);
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void preEvaluateBV(REAL v);
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/* curve backend routines */
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void segment( REAL, REAL );
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void curvpts( long, REAL *, long, int, REAL, REAL );
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void curvgrid( REAL, REAL, long );
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void curvmesh( long, long );
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void bgnline( void );
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void endline( void );
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void endcurv( void );
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#endif /* __glubackend_h_ */