1 /*
2 ** License Applicability. Except to the extent portions of this file are
3 ** made subject to an alternative license as permitted in the SGI Free
4 ** Software License B, Version 1.1 (the "License"), the contents of this
5 ** file are subject only to the provisions of the License. You may not use
6 ** this file except in compliance with the License. You may obtain a copy
7 ** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600
8 ** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at:
9 **
10 ** http://oss.sgi.com/projects/FreeB
11 **
12 ** Note that, as provided in the License, the Software is distributed on an
13 ** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS
14 ** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND
15 ** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A
16 ** PARTICULAR PURPOSE, AND NON-INFRINGEMENT.
17 **
18 ** Original Code. The Original Code is: OpenGL Sample Implementation,
19 ** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics,
20 ** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc.
21 ** Copyright in any portions created by third parties is as indicated
22 ** elsewhere herein. All Rights Reserved.
23 **
24 ** Additional Notice Provisions: The application programming interfaces
25 ** established by SGI in conjunction with the Original Code are The
26 ** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released
27 ** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version
28 ** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X
29 ** Window System(R) (Version 1.3), released October 19, 1998. This software
30 ** was created using the OpenGL(R) version 1.2.1 Sample Implementation
31 ** published by SGI, but has not been independently verified as being
32 ** compliant with the OpenGL(R) version 1.2.1 Specification.
33 */
34 
35 /*
36  * flist.c++
37  *
38  */
39 
40 //#include "glimports.h"
41 #include "myassert.h"
42 //#include "mystdio.h"
43 #include "flist.h"
44 
45 /*----------------------------------------------------------------------------
46  * Flist::Flist - initialize a REAL number array
47  *----------------------------------------------------------------------------
48  */
49 Flist::Flist( void )
50 {
51     npts = 0;
52     pts = 0;
53     start = end = 0;
54 }
55 
56 /*----------------------------------------------------------------------------
57  * Flist::~Flist - free a REAL number array
58  *----------------------------------------------------------------------------
59  */
60 Flist::~Flist( void )
61 {
62     if( npts ) delete[] pts;
63 }
64 
65 void
66 Flist::add( REAL x )
67 {
68     pts[end++] = x;
69     assert( end <= npts );
70 }
71 
72 /*----------------------------------------------------------------------------
73  * Flist::filter - remove duplicate numbers from array
74  *----------------------------------------------------------------------------
75  */
76 void Flist::filter( void )
77 {
78     sorter.qsort( pts, end );
79     start = 0;
80 
81     int j = 0;
82     for( int i = 1; i < end; i++ ) {
83 	if( pts[i] == pts[i-j-1] )
84 	    j++;
85 	pts[i-j] = pts[i];
86     }
87     end -= j;
88 }
89 
90 /*----------------------------------------------------------------------------
91  * Flist::grow - ensure that array is large enough
92  *----------------------------------------------------------------------------
93  */
94 void Flist::grow( int maxpts )
95 {
96     if( npts < maxpts ) {
97 	if( npts ) delete[] pts;
98 	npts = 2 * maxpts;
99 	pts = new REAL[npts];
100 	assert( pts != 0 );
101     }
102     start = end = 0;
103 }
104 
105 /*----------------------------------------------------------------------------
106  * Flist::taper - ignore head and tail of array
107  *----------------------------------------------------------------------------
108  */
109 void Flist::taper( REAL from, REAL to )
110 {
111     while( pts[start] != from )
112 	start++;
113 
114     while( pts[end-1] != to )
115 	end--;
116 }
117 
118 
119