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1 /*
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2 TouchKeys: multi-touch musical keyboard control software
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3 Copyright (c) 2013 Andrew McPherson
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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 =====================================================================
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19
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20 KeyTouchFrame.h: class that represents the data of one frame from the TouchKeys.
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21 */
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22
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23 #ifndef KEY_TOUCH_FRAME_H
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24 #define KEY_TOUCH_FRAME_H
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25
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26 #define kWhiteFrontBackCutoff (6.5/19.0) // Border between 2- and 1-dimensional sensing regions
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27
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28 // This class holds one frame of key touch data, both raw values and unique ID numbers
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29 // that help connect one frame to the next
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30
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31 class KeyTouchFrame {
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32 public:
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33 KeyTouchFrame() : count(0), locH(-1.0), nextId(0), white(true) {
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34 for(int i = 0; i < 3; i++) {
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35 ids[i] = -1;
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36 locs[i] = -1.0;
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37 sizes[i] = 0.0;
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38 }
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39 }
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40
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41 KeyTouchFrame(int newCount, float* newLocs, float *newSizes, float newLocH, bool newWhite)
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42 : count(newCount), locH(newLocH), nextId(0), white(newWhite) {
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43 for(int i = 0; i < count; i++) {
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44 ids[i] = -1;
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45 locs[i] = newLocs[i];
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46 sizes[i] = newSizes[i];
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47 }
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48 for(int i = count; i < 3; i++) {
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49 ids[i] = -1;
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50 locs[i] = -1.0;
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51 sizes[i] = 0.0;
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52 }
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53 }
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54
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55 KeyTouchFrame(const KeyTouchFrame& copy) : count(copy.count), locH(copy.locH), nextId(copy.nextId), white(copy.white) {
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56 for(int i = 0; i < 3; i++) {
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57 ids[i] = copy.ids[i];
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58 locs[i] = copy.locs[i];
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59 sizes[i] = copy.sizes[i];
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60 }
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61 }
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62
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63 // Horizontal location only makes sense in the front part of the key. Return the
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64 // value if applicable, otherwise -1.
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65 float horizontal(int index) const {
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66 //if(!white)
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67 // return -1.0;
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68 if(index >= count || index > 2 || index < 0)
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69 return -1.0;
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70 //if(locs[index] < kWhiteFrontBackCutoff) // FIXME: need better hardware-dependent solution to this
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71 return locH;
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72 //return -1.0;
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73 }
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74
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75 int count; // Number of active touches (0-3)
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76 int ids[3]; // Unique ID numbers for current touches
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77 float locs[3]; // Vertical location of current touches
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78 float sizes[3]; // Contact area of current touches
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79 float locH; // Horizontal location (white keys only)
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80 int nextId; // ID number to be used for the next new touch added
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81 bool white; // Whether this is a white key
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82 };
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83
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84 #endif /* KEY_TOUCH_FRAME_H */ |
