ReactOS  0.4.14-dev-49-gfb4591c
curvelist.cc
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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  * curvelist.c++
37  *
38  */
39 
40 //#include "glimports.h"
41 //#include "myassert.h"
42 //#include "mystdio.h"
43 #include "quilt.h"
44 #include "curvelist.h"
45 #include "curve.h"
46 //#include "types.h"
47 
48 Curvelist::Curvelist( Quilt *quilts, REAL pta, REAL ptb )
49 {
50  curve = 0;
51  for( Quilt *q = quilts; q; q = q->next )
52  curve = new Curve( q, pta, ptb, curve );
53  range[0] = pta;
54  range[1] = ptb;
55  range[2] = ptb - pta;
56  needsSubdivision = 0;
57  stepsize = 0;
58 }
59 
61 {
62  curve = 0;
63  for( Curve *c = upper.curve; c; c = c->next )
64  curve = new Curve( *c, value, curve );
65 
66  range[0] = upper.range[0];
67  range[1] = value;
68  range[2] = value - upper.range[0];
69  upper.range[0] = value;
70  upper.range[2] = upper.range[1] - value;
71  needsSubdivision = 0;
72  stepsize = 0;
73 }
74 
76 {
77  while( curve ) {
78  Curve *c = curve;
79  curve = curve->next;
80  delete c;
81  }
82 }
83 
84 int
86 {
87  for( Curve *c = curve; c; c = c->next )
88  if( c->cullCheck() == CULL_TRIVIAL_REJECT )
89  return CULL_TRIVIAL_REJECT;
90  return CULL_ACCEPT;
91 }
92 
93 void
95 {
96  stepsize = range[2];
97  Curve *c;
98  for( c = curve; c; c = c->next ) {
99  c->getstepsize();
100  c->clamp();
101  stepsize = ((c->stepsize < stepsize) ? c->stepsize : stepsize);
102  if( c->needsSamplingSubdivision() ) break;
103  }
104  needsSubdivision = ( c ) ? 1 : 0;
105 }
106 
107 int
109 {
110  return needsSubdivision;
111 }
112 
~Curvelist(void)
Definition: curvelist.cc:75
Definition: quilt.h:64
#define CULL_ACCEPT
Definition: defines.h:42
const GLubyte * c
Definition: glext.h:8905
GLdouble GLdouble GLdouble GLdouble q
Definition: gl.h:2063
void getstepsize(void)
Definition: curvelist.cc:94
Curve * curve
Definition: curvelist.h:57
Definition: curve.h:46
GLsizei const GLfloat * value
Definition: glext.h:6069
int cullCheck(void)
Definition: curvelist.cc:85
int needsSamplingSubdivision()
Definition: curvelist.cc:108
GLenum GLint * range
Definition: glext.h:7539
Curvelist(Quilt *, REAL, REAL)
Definition: curvelist.cc:48
float stepsize
Definition: curvelist.h:60
struct define * next
Definition: wpp.c:35
#define c
Definition: ke_i.h:80
float REAL
Definition: types.h:41
int needsSubdivision
Definition: curvelist.h:59
float range[3]
Definition: curvelist.h:58
#define CULL_TRIVIAL_REJECT
Definition: defines.h:40
Curve * next
Definition: curve.h:51