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1 /*
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2 glviewvol is an OpenGL 3D volume data viewer
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3 Copyright (C) 2014 John Tsiombikas <nuclear@member.fsf.org>
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4
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5 This program is free software: you can redistribute it and/or modify
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6 it under the terms of the GNU General Public License as published by
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7 the Free Software Foundation, either version 3 of the License, or
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8 (at your option) any later version.
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9
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10 This program is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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13 GNU General Public License for more details.
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14
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15 You should have received a copy of the GNU General Public License
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16 along with this program. If not, see <http://www.gnu.org/licenses/>.
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17 */
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18 #ifndef RENDERER_H_
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19 #define RENDERER_H_
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20
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21 #include "volume.h"
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22 #include "xfermap.h"
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23
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24 #define MAX_CLIP_PLANES 4
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25
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26 class Renderer {
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27 protected:
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28 int view_width, view_height;
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29 Volume *vol;
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30
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31 float clip_plane[MAX_CLIP_PLANES][4]; // nx,ny,nz,dist
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32
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33 TransferFunc *xfer;
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34 float zscale;
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35
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36 public:
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37 Renderer();
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38 virtual ~Renderer();
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39
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40 virtual bool init();
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41 virtual void destroy();
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42
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43 virtual void set_volume(Volume *vol);
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44 virtual Volume *get_volume() const;
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45
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46 virtual void set_zscale(float zs);
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47 virtual float get_zscale() const;
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48
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49 virtual void set_transfer_function(TransferFunc *xfer);
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50 virtual TransferFunc *get_transfer_function() const;
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51
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52 virtual void set_clipping_plane(int idx, float nx, float ny, float nz, float dist);
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53 virtual void disable_clipping_plane(int idx);
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54
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55 virtual void reshape(int x, int y);
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56
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57 virtual void update(unsigned int msec);
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58 virtual void render() const = 0;
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59 };
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60
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61 #endif // RENDERER_H_
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