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:
10 ** http://oss.sgi.com/projects/FreeB
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.
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.
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.
40 #include <math.h> //for fabs()
41 #include "glimports.h"
43 #include "sampledLine.h"
45 void sampledLine::setPoint(Int i
, Real p
[2])
52 /*insert this single line in front of the oldList*/
53 sampledLine
* sampledLine::insert(sampledLine
*oldList
)
59 void sampledLine::deleteList()
61 sampledLine
*temp
, *tempNext
;
62 for(temp
= this; temp
!= NULL
; temp
= tempNext
)
64 tempNext
= temp
->next
;
70 /*space of points[][2] is allocated*/
71 sampledLine::sampledLine(Int n_points
)
74 points
= (Real2
*) malloc(sizeof(Real2
) * n_points
);
79 /*space of points[][2] is allocated and
82 sampledLine::sampledLine(Int n_points
, Real2 pts
[])
86 points
= (Real2
*) malloc(sizeof(Real2
) * n_points
);
88 for(i
=0; i
<npoints
; i
++) {
89 points
[i
][0] = pts
[i
][0];
90 points
[i
][1] = pts
[i
][1];
95 sampledLine::sampledLine(Real pt1
[2], Real pt2
[2])
98 points
= (Real2
*) malloc(sizeof(Real2
) * 2);
100 points
[0][0] = pt1
[0];
101 points
[0][1] = pt1
[1];
102 points
[1][0] = pt2
[0];
103 points
[1][1] = pt2
[1];
107 //needs tp call init to setup
108 sampledLine::sampledLine()
115 //warning: ONLY pointer is copies!!!
116 void sampledLine::init(Int n_points
, Real2
*pts
)
122 /*points[] is dealocated
124 sampledLine::~sampledLine()
129 void sampledLine::print()
132 printf("npoints=%i\n", npoints
);
134 for(i
=0; i
<npoints
; i
++){
135 printf("(%f,%f)\n", points
[i
][0], points
[i
][1]);
140 void sampledLine::tessellate(Real u_reso
, Real v_reso
)
145 nu
= 1+(Int
) (fabs((points
[npoints
-1][0] - points
[0][0])) * u_reso
);
146 nv
= 1+(Int
) (fabs((points
[npoints
-1][1] - points
[0][1])) * v_reso
);
153 //du dv could be negative
154 Real du
= (points
[npoints
-1][0] - points
[0][0])/n
;
155 Real dv
= (points
[npoints
-1][1] - points
[0][1])/n
;
156 Real2
*temp
= (Real2
*) malloc(sizeof(Real2
) * (n
+1));
160 for(i
=0, u
=points
[0][0], v
=points
[0][1]; i
<n
; i
++, u
+=du
, v
+=dv
)
165 temp
[n
][0] = points
[npoints
-1][0];
166 temp
[n
][1] = points
[npoints
-1][1];
175 void sampledLine::tessellateAll(Real u_reso
, Real v_reso
)
178 for(temp
= this; temp
!= NULL
; temp
= temp
->next
)
180 temp
->tessellate(u_reso
, v_reso
);