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1 #include "Chunk.h"
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2 #include "DrawInfo.h"
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3
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4
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5 #include "cinder/gl/gl.h"
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6
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7
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8 Chunk::Chunk( size_t index ) :
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9 mIndex( index ),
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10 mAudioTop(0.0f),
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11 mAudioBottom(0.0f)
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12 {}
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13
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14
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15 void update( const DrawInfo& di )
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16 {
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17
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18 }
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19
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20 void Chunk::update( const DrawInfo &di )
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21 {
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22 using namespace ci;
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23 /* if resetting animate the chunks to shrink to 0 size */
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24 if ( mResetting ){
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25 if ( mAnimate > 0.0f ){
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26 mAnimate -= 0.1f;
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27 if ( mAnimate <= 0.0f ){
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28 mAnimate = 0.0f;
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29 mResetting = false;
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30 mAudioTop = 0.0f;
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31 mAudioBottom = 0.0f;
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32 }
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33 }
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34 }
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35 /* animate makes the chunks pop nicely when they are created */
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36 else if ( mAnimate < 1.0f ){
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37 mAnimate += 0.3333f; // in three (namely 1/0.333) steps
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38 if ( mAnimate > 1.0f ){ // clip to one
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39 mAnimate = 1.0f;
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40 }
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41 }
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42
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43 mX = di.flipX( 1 + (mIndex * (2 + kWidth)) ); // FIXME this should happen only once when resized
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44 }
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45
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46 void Chunk::draw( const DrawInfo& di, ci::gl::BatchRef &batch ){
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47 using namespace ci;
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48
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49 gl::pushModelMatrix();
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50
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51 const float chunkHeight = mAnimate * mAudioTop * di.getMaxChunkHeight();
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52
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53 // place the chunk in the right position brigns back the y of chunkHeight/2 so
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54 // so that after scaling the wave is still centered at the wave center
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55 gl::translate( mX, di.getWaveCenterY() - ( chunkHeight / 2 ) - 1 );
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56
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57 // FIXME todo use max between top and bottom
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58 // scale according to audio amplitude
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59 gl::scale( 1.0f, chunkHeight );
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60 batch->draw();
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61
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62
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63 gl::popModelMatrix();
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64 }
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65
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66
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67 void Chunk::drawBar( const DrawInfo& di, ci::gl::BatchRef &batch ){
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68 using namespace ci;
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69
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70 gl::pushModelMatrix();
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71
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72 const float barHeight = di.getSelectionBarHeight();
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73
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74 gl::translate( mX, di.getWaveCenterY() - ( barHeight / 2 ) - 1 );
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75 gl::scale( 1.0f, barHeight );
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76
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77 batch->draw();
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78
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79 gl::popModelMatrix();
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80 }
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81
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82
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83 const float Chunk::kWidth = 7.0f;
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84 const float Chunk::kHalfWidth = 3.5f; |
