xref: /xsrc/external/mit/glu/dist/src/libnurbs/internals/uarray.cc

/*
** 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.
*/

/*
 * uarray.c++
 *
 */

#include "glimports.h"
#include "myassert.h"
#include "mystdio.h"
#include "uarray.h"
#include "arc.h"

Uarray::Uarray( void )
{
    uarray = 0;
    size = 0;
    ulines = 0;
}

Uarray::~Uarray( void )
{
    if( uarray ) delete[] uarray;
}

long
Uarray::init( REAL delta, Arc_ptr lo, Arc_ptr hi )
{
    ulines = (long) ((hi->tail()[0] - lo->tail()[0])/delta) + 3;
    if( size < ulines ) {
	size = ulines * 2;
	if( uarray ) delete[] uarray;
	uarray = new REAL[size];
	assert( uarray != 0);
    }
    uarray[0] = lo->tail()[0] - delta/2.0;
    for( long i = 1 ; i != ulines; i++ )
	uarray[i] = uarray[0] + i*delta;
    return ulines;
}