1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
|
/*
*
* Copyright (C) 2000 Silicon Graphics, Inc. All Rights Reserved.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* Further, this software is distributed without any warranty that it is
* free of the rightful claim of any third person regarding infringement
* or the like. Any license provided herein, whether implied or
* otherwise, applies only to this software file. Patent licenses, if
* any, provided herein do not apply to combinations of this program with
* other software, or any other product whatsoever.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Contact information: Silicon Graphics, Inc., 1600 Amphitheatre Pkwy,
* Mountain View, CA 94043, or:
*
* http://www.sgi.com
*
* For further information regarding this notice, see:
*
* http://oss.sgi.com/projects/GenInfo/NoticeExplan/
*
*/
// -*- C++ -*-
/*
* Copyright (C) 1990,91,92,93 Silicon Graphics, Inc.
*
_______________________________________________________________________
______________ S I L I C O N G R A P H I C S I N C . ____________
|
| $Revision: 1.1.1.1 $
|
| Description:
| This file defines the SoNurbsSurface node class.
|
| Author(s) : Dave Immel
|
______________ S I L I C O N G R A P H I C S I N C . ____________
_______________________________________________________________________
*/
#ifndef _SO_NURBS_SURFACE_
#define _SO_NURBS_SURFACE_
#include <Inventor/SbLinear.h>
#include <Inventor/fields/SoMFFloat.h>
#include <Inventor/fields/SoSFFloat.h>
#include <Inventor/fields/SoSFInt32.h>
#include <Inventor/nodes/SoShape.h>
//////////////////////////////////////////////////////////////////////////////
//
// Class: SoNurbsSurface
//
// NURBS surface. The surface consists of two knot vectors and orders for
// the U and V parametric directions. The control points for the surface
// are obtained from the current coordinates. There are also orders and
// knot vectors for the S and T (texture) coordinates
//
//////////////////////////////////////////////////////////////////////////////
class SoState;
class SoPrimitiveVertex;
class _SoNurbsNurbsTessellator;
// C-api: prefix=SoNurbs
// C-api: public=numUControlPoints, numVControlPoints
// C-api: public=numSControlPoints, numTControlPoints
// C-api: public=uKnotVector, vKnotVector
// C-api: public=sKnotVector, tKnotVector
class SoNurbsSurface : public SoShape {
SO_NODE_HEADER(SoNurbsSurface);
public:
// Fields
SoSFInt32 numUControlPoints; // Number of control points in
SoSFInt32 numVControlPoints; // the U and V directions.
SoSFInt32 numSControlPoints; // Number of control points in
SoSFInt32 numTControlPoints; // the S and T directions
SoMFFloat uKnotVector; // The knot vectors in the U and
SoMFFloat vKnotVector; // V directions.
SoMFFloat sKnotVector; // The knot vectors in the S and
SoMFFloat tKnotVector; // T directions.
// Constructor
SoNurbsSurface();
SoEXTENDER public:
virtual void GLRender(SoGLRenderAction *action);
virtual void rayPick(SoRayPickAction *action);
SoINTERNAL public:
static void initClass();
void sendPrimitive(SoAction *, SoPrimitiveVertex *);
protected:
// Generates triangles representing a surface
virtual void generatePrimitives(SoAction *action);
// Computes bounding box of surface
virtual void computeBBox(SoAction *action, SbBox3f &box,
SbVec3f ¢er);
~SoNurbsSurface();
private:
// Renders the surface
void drawNURBS(_SoNurbsNurbsTessellator *render, SoState *state,
SbBool doTextures);
// Matrix operations for level of detail and culling
void calcTotalMatrix( SoState *state, SbMatrix &totalMat );
void multMatrix4d( SbMatrix &n, SbMatrix left,
SbMatrix right );
// This callback gets details from the NURBS library
static void primCB(SoAction *, SoPrimitiveVertex *, void *);
};
#endif /* _SO_NURBS_SURFACE_ */
|
