1 /*

2 glviewvol is an OpenGL 3D volume data viewer

3 Copyright (C) 2014 John Tsiombikas <nuclear@member.fsf.org>

4

5 This program is free software: you can redistribute it and/or modify

6 it under the terms of the GNU General Public License as published by

7 the Free Software Foundation, either version 3 of the License, or

8 (at your option) any later version.

9

10 This program is distributed in the hope that it will be useful,

11 but WITHOUT ANY WARRANTY; without even the implied warranty of

12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

13 GNU General Public License for more details.

14

15 You should have received a copy of the GNU General Public License

16 along with this program. If not, see <http://www.gnu.org/licenses/>.

17 */

18 #ifndef VOLUME_H_

19 #define VOLUME_H_

20

21 #include <vector>

22 #include "image.h"

23

24 class Volume {

25 public:

26 virtual ~Volume();

27

28 // returns 0 if the volume is continuously defined

29 virtual int num_samples(int dim) const;

30

31 // central differences offset will be delta / num_samples for discrete volumes

32 // and delta for continuous volumes

33 virtual void normalf(float *norm, float x, float y, float z, float delta = 1.0);

34 virtual void normali(float *norm, int x, int y, int z);

35

36 virtual float valuef(float x, float y, float z) const = 0;

37 virtual float valuei(int x, int y, int z) const = 0;

38 };

39

40 class VoxelVolume : public Volume {

41 protected:

42 int size[3];

43 std::vector<Image> slices;

44

45 float *hist;

46 int num_hist_samples;

47 bool hist_valid;

48

49 public:

50 VoxelVolume();

51 ~VoxelVolume();

52

53 bool load(const char *fname);

54

55 int num_samples(int dim) const;

56

57 float valuef(float x, float y, float z) const;

58 float valuei(int x, int y, int z) const;

59

60 float *calc_histogram(int hist_samples);

61 };

62

63 #endif // VOLUME_H_