source: nanovis/branches/1.1/Volume.h @ 4906

Last change on this file since 4906 was 4904, checked in by ldelgass, 9 years ago

Merge serveral changes from trunk. Does not include threading, world space
changes, etc.

  • Property svn:eol-style set to native
File size: 9.5 KB
Line 
1/* -*- mode: c++; c-basic-offset: 4; indent-tabs-mode: nil -*- */
2/*
3 * Copyright (c) 2004-2013  HUBzero Foundation, LLC
4 *
5 * Author:
6 *   Wei Qiao <qiaow@purdue.edu>
7 */
8#ifndef NV_VOLUME_H
9#define NV_VOLUME_H
10
11#include <cstring>
12#include <string>
13#include <vector>
14
15#include <vrmath/Vector3f.h>
16
17#include "Texture3D.h"
18#include "AxisRange.h"
19#include "TransferFunction.h"
20
21namespace nv {
22
23class CutPlane {
24public:
25    enum Axis {
26        X_AXIS = 1,
27        Y_AXIS = 2,
28        Z_AXIS = 3
29    };
30
31    CutPlane(Axis _orient, float _offset) :
32        orient(_orient),
33        offset(_offset),
34        enabled(true)
35    {
36    }
37
38    Axis orient;
39    float offset;       ///< normalized offset [0,1] in the volume
40    bool enabled;
41};
42
43class VolumeInterpolator;
44
45class Volume
46{
47public:
48    enum VolumeType {
49        CUBIC,
50        VOLQD,
51        ZINCBLENDE
52    };
53
54    /**
55     * \brief Volume data constructor
56     *
57     * Represents a 3D regular grid with uniform spacing along
58     * each axis.  Sample spacing may differ between X, Y and Z
59     *
60     * \param x X location
61     * \param y Y location
62     * \param z Z location
63     * \param width Number of samples in X
64     * \param height Number of samples in Y
65     * \param depth Number of samples in Z
66     * \param numComponents Number of components per sample
67     * \param data width * height * depth * numComponent sample array
68     * \param vmin Scalar value minimum
69     * \param vmax Scalar value maximum
70     * \param nonZeroMin Scalar minimum which is greater than zero
71     */
72    Volume(float x, float y, float z,
73           int width, int height, int depth,
74           int numComponents,
75           float *data,
76           double vmin, double vmax,
77           double nonZeroMin);
78
79    virtual ~Volume();
80
81    int width() const
82    {
83        return _width;
84    }
85
86    int height() const
87    {
88        return _height;
89    }
90
91    int depth() const
92    {
93        return _depth;
94    }
95
96    void visible(bool value)
97    {
98        _enabled = value;
99    }
100
101    bool visible() const
102    {
103        return _enabled;
104    }
105
106    int isosurface() const
107    {
108        return _isosurface;
109    }
110
111    void isosurface(int iso)
112    {
113        _isosurface = iso;
114    }
115
116    int numComponents() const
117    {
118        return _numComponents;
119    }
120
121    double nonZeroMin() const
122    {
123        return _nonZeroMin;
124    }
125
126    int volumeType() const
127    {
128        return _volumeType;
129    }
130
131    const float *data() const
132    {
133        return _data;
134    }
135
136    const Texture3D *tex() const
137    {
138        return _tex;
139    }
140
141    int numSlices() const
142    {
143        return _numSlices;
144    }
145
146    void numSlices(int n)
147    {
148        _numSlices = n;
149    }
150
151    // methods related to cutplanes
152    /// add a plane and returns its index
153    int addCutplane(CutPlane::Axis orientation, float location);
154
155    void enableCutplane(int index);
156
157    void disableCutplane(int index);
158
159    void cutplanesVisible(bool state)
160    {
161        _cutplanesVisible = state;
162    }
163
164    bool cutplanesVisible() const
165    {
166        return _cutplanesVisible;
167    }
168
169    void setCutplanePosition(int index, float location);
170
171    CutPlane *getCutplane(int index);
172
173    /// returns the number of cutplanes in the volume
174    int getCutplaneCount();
175
176    /// check if a cutplane is enabled
177    bool isCutplaneEnabled(int index) const;
178
179    // methods related to shading. These parameters are per volume
180
181    /// Get ambient coefficient
182    float ambient() const
183    {
184        return _ambient;
185    }
186
187    /// Set ambient coefficient [0,1]
188    void ambient(float value)
189    {
190        if (value < 0.0f) value = 0.0f;
191        if (value > 1.0f) value = 1.0f;
192        _ambient = value;
193    }
194
195    /// Get diffuse coefficient
196    float diffuse() const
197    {
198        return _diffuse;
199    }
200
201    /// Set diffuse coefficient [0,1]
202    void diffuse(float value)
203    {
204        if (value < 0.0f) value = 0.0f;
205        if (value > 1.0f) value = 1.0f;
206        _diffuse = value;
207    }
208
209    /// Get specular coefficient
210    float specularLevel() const
211    {
212        return _specular;
213    }
214
215    /// Set specular coefficient [0,1]
216    void specularLevel(float value)
217    {
218        if (value < 0.0f) value = 0.0f;
219        if (value > 1.0f) value = 1.0f;
220        _specular = value;
221    }
222
223    /// Get specular exponent
224    float specularExponent() const
225    {
226        return _specularExp;
227    }
228
229    /// Set specular exponent [0,128]
230    void specularExponent(float value)
231    {
232        if (value < 0.0f) value = 0.0f;
233        if (value > 128.0f) value = 128.0f;
234        _specularExp = value;
235    }
236
237    bool twoSidedLighting() const
238    {
239        return _lightTwoSide;
240    }
241
242    void twoSidedLighting(bool value)
243    {
244        _lightTwoSide = value;
245    }
246
247    float opacityScale() const
248    {
249        return _opacityScale;
250    }
251
252    void opacityScale(float value)
253    {
254        _opacityScale = value;
255    }
256
257    void dataEnabled(bool value)
258    {
259        _dataEnabled = value;
260    }
261
262    bool dataEnabled() const
263    {
264        return _dataEnabled;
265    }
266
267    void outline(bool value)
268    {
269        _outlineEnabled = value;
270    }
271
272    bool outline()
273    {
274        return _outlineEnabled;
275    }
276
277    TransferFunction *transferFunction()
278    {
279        return _transferFunc;
280    }
281
282    void transferFunction(TransferFunction *transferFunc)
283    {
284        _transferFunc = transferFunc;
285    }
286
287    void setOutlineColor(float *rgb);
288
289    void getOutlineColor(float *rgb);
290
291    void setPosition(const vrmath::Vector3f& pos)
292    {
293        _position = pos;
294    }
295
296    const vrmath::Vector3f& getPosition() const
297    {
298        return _position;
299    }
300
301    vrmath::Vector3f getPhysicalScaling() const
302    {
303        vrmath::Vector3f scale;
304        scale.x = 1;
305        scale.y = yAxis.length() / xAxis.length();
306        scale.z = zAxis.length() / xAxis.length();
307        return scale;
308    }
309
310    void setScale(const vrmath::Vector3f& scale)
311    {
312        _scale = scale;
313    }
314
315    const vrmath::Vector3f& getScale() const
316    {
317        return _scale;
318    }
319
320    void getWorldSpaceBounds(vrmath::Vector3f& bboxMin,
321                             vrmath::Vector3f& bboxMax) const;
322 
323    double sampleDistanceX() const
324    {
325        return (xAxis.length() / ((double)_width-1.0));
326    }
327
328    double sampleDistanceY() const
329    {
330        return (yAxis.length() / ((double)_height-1.0));
331    }
332
333    double sampleDistanceZ() const
334    {
335        if (_depth == 1)
336            return sampleDistanceX();
337        return (zAxis.length() / ((double)_depth-1.0));
338    }
339
340    const char *name() const
341    {
342        return _name.c_str();
343    }
344
345    void name(const char *name)
346    {
347        _name = name;
348    }
349
350    GLuint textureID() const
351    {
352        return _id;
353    }
354
355    AxisRange xAxis, yAxis, zAxis, wAxis;
356
357    static bool updatePending;
358    static double valueMin, valueMax;
359
360    friend class VolumeInterpolator;
361
362protected:
363    float *data()
364    {
365        return _data;
366    }
367
368    Texture3D *tex()
369    {
370        return _tex;
371    }
372
373    GLuint _id;         ///< OpenGL textue identifier (==_tex->id)
374
375    // Width, height and depth are point resolution, NOT physical
376    // units
377    /// The resolution of the data (how many points in X direction)
378    int _width;
379    /// The resolution of the data (how many points in Y direction)
380    int _height;
381    /// The resolution of the data (how many points in Z direction)
382    int _depth;
383
384    /**
385     * This is the designated transfer function to use to
386     * render this volume.
387     */
388    TransferFunction *_transferFunc;
389
390    float _ambient;      ///< Ambient material coefficient
391    float _diffuse;      ///< Diffuse material coefficient
392    float _specular;     ///< Specular level material coefficient
393    float _specularExp;  ///< Specular exponent
394    bool _lightTwoSide;  ///< Two-sided lighting flag
395
396    /**
397     * The scale multiplied to the opacity assigned by the
398     * transfer function.
399     */
400    float _opacityScale;
401
402    std::string _name;
403
404    float *_data;
405
406    int _numComponents;
407
408    double _nonZeroMin;
409
410    bool _cutplanesVisible;
411    std::vector<CutPlane> _plane; ///< cut planes
412
413    Texture3D *_tex;            ///< OpenGL texture storing the volume
414
415    vrmath::Vector3f _position;
416    vrmath::Vector3f _scale;
417
418    /**
419     * Number of slices when rendered. The greater
420     * the better quality, lower speed.
421     */
422    int _numSlices;
423    bool _enabled;
424    bool _dataEnabled;          ///< show/hide cloud of volume data
425    bool _outlineEnabled;       ///< show/hide outline around volume
426    float _outlineColor[3];     ///< color for outline around volume
427    int _volumeType;            ///< cubic or zincblende
428    int _isosurface;
429};
430
431inline int
432Volume::addCutplane(CutPlane::Axis orientation, float location)
433{
434    _plane.push_back(CutPlane(orientation, location));
435    return _plane.size() - 1;
436}
437
438inline void
439Volume::enableCutplane(int index)
440{
441    //assert(index < plane.size());
442    _plane[index].enabled = true;
443}
444
445inline void
446Volume::disableCutplane(int index)
447{
448    //assert(index < plane.size());
449    _plane[index].enabled = false;
450}
451
452inline void
453Volume::setCutplanePosition(int index, float position)
454{
455    //assert(index < plane.size());
456    _plane[index].offset = position;
457}
458
459inline CutPlane *
460Volume::getCutplane(int index)
461{
462    //assert(index < plane.size());
463    return &_plane[index];
464}
465
466inline int
467Volume::getCutplaneCount()
468{
469    return _plane.size();
470}
471
472inline bool
473Volume::isCutplaneEnabled(int index) const
474{
475    //assert(index < plane.size());
476    return _plane[index].enabled;
477}
478
479inline void
480Volume::setOutlineColor(float *rgb)
481{
482    memcpy(_outlineColor, rgb, sizeof(float)*3);
483}
484
485inline void
486Volume::getOutlineColor(float *rgb)
487{
488    memcpy(rgb, _outlineColor, sizeof(float)*3);
489}
490
491}
492
493#endif
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