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.
44 #include "primitiveStream.h"
46 Int
primStream::num_triangles()
50 for(i
=0; i
<index_lengths
; i
++)
59 /*the begining of inserting a new primitive.
60 *reset counter to be 0.
62 void primStream::begin()
67 void primStream::insert(Real u
, Real v
)
69 /*if the space cannot hold u and v,
70 *we have to expand the array
72 if(index_vertices
+1 >= size_vertices
) {
73 Real
* temp
= (Real
*) malloc (sizeof(Real
) * (2*size_vertices
+ 2));
77 for(Int i
=0; i
<index_vertices
; i
++)
78 temp
[i
] = vertices
[i
];
82 size_vertices
= 2*size_vertices
+ 2;
85 vertices
[index_vertices
++] = u
;
86 vertices
[index_vertices
++] = v
;
90 /*the end of a primitive.
91 *increase index_lengths
93 void primStream::end(Int type
)
96 /*if there is no vertex in this primitive,
97 *nothing needs to be done
99 if(counter
== 0) return ;
101 if(index_lengths
>= size_lengths
){
102 Int
* temp
= (Int
*) malloc(sizeof(Int
) * (2*size_lengths
+ 2));
104 Int
* tempTypes
= (Int
*) malloc(sizeof(Int
) * (2*size_lengths
+ 2));
108 for(i
=0; i
<index_lengths
; i
++){
109 temp
[i
] = lengths
[i
];
110 tempTypes
[i
] = types
[i
];
117 size_lengths
= 2*size_lengths
+ 2;
119 lengths
[index_lengths
] = counter
;
120 types
[index_lengths
] = type
;
124 void primStream::print()
127 printf("index_lengths=%i,size_lengths=%i\n", index_lengths
, size_lengths
);
128 printf("index_vertices=%i,size_vertices=%i\n", index_vertices
, size_vertices
);
130 for(i
=0; i
<index_lengths
; i
++)
132 if(types
[i
] == PRIMITIVE_STREAM_FAN
)
133 printf("primitive-FAN:\n");
135 printf("primitive-STRIP:\n");
136 for(j
=0; j
<lengths
[i
]; j
++)
138 printf("(%f,%f) ", vertices
[k
], vertices
[k
+1]);
145 primStream::primStream(Int sizeLengths
, Int sizeVertices
)
147 lengths
= (Int
*)malloc (sizeof(Int
) * sizeLengths
);
149 types
= (Int
*)malloc (sizeof(Int
) * sizeLengths
);
152 vertices
= (Real
*) malloc(sizeof(Real
) * sizeVertices
);
157 size_lengths
= sizeLengths
;
158 size_vertices
= sizeVertices
;
161 primStream::~primStream()
168 void primStream::draw()
172 for(i
=0; i
<index_lengths
; i
++)
175 case PRIMITIVE_STREAM_FAN
:
176 glBegin(GL_TRIANGLE_FAN
);
178 case PRIMITIVE_STREAM_STRIP
:
179 glBegin(GL_TRIANGLE_STRIP
);
183 for(j
=0; j
<lengths
[i
]; j
++){
184 glVertex2fv(vertices
+k
);