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1 /*
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2
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3 Copyright (C) 2015 Fiore Martin
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4 Copyright (C) 2016 Queen Mary University of London
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5 Author: Fiore Martin
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6
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7 This file is part of Collidoscope.
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8
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9 Collidoscope is free software: you can redistribute it and/or modify
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10 it under the terms of the GNU General Public License as published by
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11 the Free Software Foundation, either version 3 of the License, or
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12 (at your option) any later version.
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13
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14 This program is distributed in the hope that it will be useful,
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15 but WITHOUT ANY WARRANTY; without even the implied warranty of
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16 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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17 GNU General Public License for more details.
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18
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19 You should have received a copy of the GNU General Public License
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20 along with this program. If not, see <http://www.gnu.org/licenses/>.
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21
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22 */
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23
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24
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25 #include "Chunk.h"
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26 #include "DrawInfo.h"
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27
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28
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29 #include "cinder/gl/gl.h"
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30
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31
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32 Chunk::Chunk( size_t index ) :
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33 mIndex( index ),
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34 mAudioTop(0.0f),
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35 mAudioBottom(0.0f)
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36 {}
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37
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38
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39 void update( const DrawInfo& di )
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40 {
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41
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42 }
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43
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44 void Chunk::update( const DrawInfo &di )
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45 {
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46 using namespace ci;
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47 /* if resetting animate the chunks to nicely shrink to 0 size */
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48 if ( mResetting ){
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49 if ( mAnimate > 0.0f ){
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50 mAnimate -= 0.1f;
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51 if ( mAnimate <= 0.0f ){
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52 mAnimate = 0.0f;
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53 mResetting = false;
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54 mAudioTop = 0.0f;
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55 mAudioBottom = 0.0f;
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56 }
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57 }
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58 }
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59 /* animate makes the chunks pop nicely when they are created */
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60 else if ( mAnimate < 1.0f ){
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61 mAnimate += 0.3333f; // in three (namely 1/0.333) steps
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62 if ( mAnimate > 1.0f ){ // clip to one
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63 mAnimate = 1.0f;
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64 }
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65 }
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66
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67 mX = di.flipX( 1 + (mIndex * (2 + kWidth)) ); // FIXME more efficient if it happens only once when resized
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68 }
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69
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70 void Chunk::draw( const DrawInfo& di, ci::gl::BatchRef &batch ){
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71 using namespace ci;
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72
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73 gl::pushModelMatrix();
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74
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75 const float chunkHeight = mAnimate * mAudioTop * di.getMaxChunkHeight();
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76
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77 // place the chunk in the right position brings back the y of chunkHeight/2 so
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78 // so that after scaling the wave is still centered at the wave center
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79 gl::translate( mX, di.getWaveCenterY() - ( chunkHeight / 2 ) - 1 );
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80
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81 // scale according to audio amplitude
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82 gl::scale( 1.0f, chunkHeight );
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83 batch->draw();
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84
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85
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86 gl::popModelMatrix();
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87 }
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88
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89
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90 void Chunk::drawBar( const DrawInfo& di, ci::gl::BatchRef &batch ){
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91 using namespace ci;
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92
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93 gl::pushModelMatrix();
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94
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95 const float barHeight = di.getSelectionBarHeight();
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96
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97 gl::translate( mX, di.getWaveCenterY() - ( barHeight / 2 ) - 1 );
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98 gl::scale( 1.0f, barHeight );
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99
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100 batch->draw();
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101
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102 gl::popModelMatrix();
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103 }
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104
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105
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106 const float Chunk::kWidth = 7.0f;
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107 const float Chunk::kHalfWidth = 3.5f;
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