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nuclear@12
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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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nuclear@6
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18 #ifndef XFERMAP_H_
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nuclear@6
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19 #define XFERMAP_H_
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20
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21 class TransferFunc {
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22 public:
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23 virtual ~TransferFunc();
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24
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25 virtual float map(float x) const = 0;
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26 virtual void map(float x, float *rgba_value) const = 0;
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27 };
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28
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29 class TransferWindow : public TransferFunc {
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30 private:
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31 float soft_rad;
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32 float low[3], high[3]; // rgb
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33
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34 public:
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35 enum { HANDLE_LOW = 0, HANDLE_HIGH = 1};
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36
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37 TransferWindow();
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38
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39 // handle: 0 or HANDLE_LOW is low, 1 or HANDLE_HIGH is high
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40 // if channel == -1, change all channels simultaneously
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41 void set_handle(int channel, int handle, float val);
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42 float get_handle(int channel, int handle) const;
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43
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44 int nearest_handle(int channel, float pos) const;
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45
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46 void set_interval(float a, float b);
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47 void set_interval(float *rgba_low, float *rgba_high);
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48 void set_interval_rgba(int channel, float a, float b);
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49
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50 void get_interval(float *aptr, float *bptr) const;
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51 void get_interval_rgba(float *rgba_low, float *rgba_high) const;
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52 void get_interval_rgba(int channel, float *aptr, float *bptr) const;
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53
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54 void set_soft_radius(float s);
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55 float get_soft_radius() const;
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56
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57 float map(float x) const;
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58 void map(float x, float *rgba_value) const;
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59 };
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60
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61 #endif // XFERMAP_H_
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