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root / CollidoscopeApp / include / DrawInfo.h @ 3:7fb593d53361
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| 1 | 0:02467299402e | f | #pragma once
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| 2 | |||
| 3 | #include "cinder/Area.h" |
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| 4 | |||
| 5 | 3:7fb593d53361 | f | /**
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| 6 | * The DrawInfo class holds size information for drawing the waves in the screen.
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| 7 | * Every time the screen is resized the draw info is updated with the new information about the window size.
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| 8 | *
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| 9 | * Every wave has its own drawInfo.
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| 10 | *
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| 11 | */
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| 12 | 0:02467299402e | f | class DrawInfo |
| 13 | {
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| 14 | public:
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| 15 | |||
| 16 | 3:7fb593d53361 | f | /**
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| 17 | * Constructor. Takes the index of the wave as argument.
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| 18 | */
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| 19 | 0:02467299402e | f | DrawInfo( size_t waveIndex ): |
| 20 | mWaveIndex( waveIndex ), |
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| 21 | mWindowWidth(0),
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| 22 | mWindowHeight(0),
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| 23 | mSelectionBarHeight(0),
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| 24 | mShrinkFactor(1)
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| 25 | {}
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| 26 | |||
| 27 | 3:7fb593d53361 | f | /**
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| 28 | * Reset this DrawInfo using the new bounding area for the wave. \a shrinkFactor
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| 29 | * makes the wave shrink on the y axis with respect to the area. A factor 1 makes the wave as big as the area, whereas a factor >1 makes it shrink.
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| 30 | */
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| 31 | 0:02467299402e | f | void reset( const ci::Area &bounds, float shrinkFactor ) |
| 32 | {
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| 33 | mWindowWidth = bounds.getWidth(); |
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| 34 | mWindowHeight = bounds.getHeight(); |
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| 35 | mSelectionBarHeight = mWindowHeight / NUM_WAVES; |
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| 36 | mShrinkFactor = shrinkFactor; |
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| 37 | } |
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| 38 | |||
| 39 | 3:7fb593d53361 | f | /**
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| 40 | * Maps a value in the audio space [-1.0, 1.0] to a position on the y axis of this DrawInf's bounding area.
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| 41 | *
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| 42 | */
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| 43 | 0:02467299402e | f | float audioToHeigt(float audioSample) const { |
| 44 | /* clip into range [-1.1] */
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| 45 | if (audioSample < -1.0f) { |
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| 46 | audioSample = -1.0f; |
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| 47 | } |
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| 48 | else if ( audioSample > 1.0f ){ |
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| 49 | audioSample = 1.0f; |
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| 50 | } |
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| 51 | |||
| 52 | /* map from [-1,1] to [0,1] */
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| 53 | float ratio = (audioSample - (-1.0f)) * 0.5f; // 2 = 1 - (-1) |
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| 54 | |||
| 55 | /* get bottom and add the scaled height */
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| 56 | return ratio * mSelectionBarHeight; //remove bounds.getY1() bound only needed for size of tier |
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| 57 | } |
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| 58 | |||
| 59 | float getMaxChunkHeight() const |
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| 60 | {
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| 61 | return mSelectionBarHeight * mShrinkFactor;
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| 62 | } |
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| 63 | |||
| 64 | float getSelectionBarHeight() const |
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| 65 | {
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| 66 | return mSelectionBarHeight;
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| 67 | } |
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| 68 | |||
| 69 | 3:7fb593d53361 | f | /**
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| 70 | * Returns the center position on the y axis of this DrawInfo's the bounding area.
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| 71 | */
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| 72 | 0:02467299402e | f | int32_t getWaveCenterY() const
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| 73 | {
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| 74 | if ( mWaveIndex == 0 ) |
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| 75 | return mWindowHeight * 0.75f + 1; |
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| 76 | else
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| 77 | return mWindowHeight / (NUM_WAVES * 2); |
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| 78 | } |
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| 79 | |||
| 80 | 3:7fb593d53361 | f | /**
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| 81 | * Flips y according to the index of the wave. It is needed because the second wave in collidoscope is upside down from the orientation oftthe screen.
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| 82 | */
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| 83 | 0:02467299402e | f | int flipY(int y) const |
| 84 | {
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| 85 | if ( mWaveIndex == 0) |
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| 86 | 3:7fb593d53361 | f | return mWindowHeight - y;
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| 87 | 0:02467299402e | f | else
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| 88 | 3:7fb593d53361 | f | return y;
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| 89 | 0:02467299402e | f | } |
| 90 | |||
| 91 | 3:7fb593d53361 | f | /**
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| 92 | * Returns x. not used at he moment.
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| 93 | *
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| 94 | */
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| 95 | 0:02467299402e | f | int flipX(int x) const |
| 96 | {
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| 97 | return x;
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| 98 | } |
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| 99 | |||
| 100 | |||
| 101 | // how much the wave is shrunk on the y axis with respect to the wave's tier
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| 102 | float getShrinkFactor() const |
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| 103 | {
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| 104 | return mShrinkFactor;
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| 105 | } |
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| 106 | |||
| 107 | int32_t getWindowWidth() const
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| 108 | {
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| 109 | return mWindowWidth;
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| 110 | } |
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| 111 | |||
| 112 | int32_t getWindowHeight() const
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| 113 | {
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| 114 | return mWindowHeight;
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| 115 | } |
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| 116 | |||
| 117 | 3:7fb593d53361 | f | /**
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| 118 | * Draw infos cannot be copied and should be passed as const reference.
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| 119 | */
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| 120 | 0:02467299402e | f | DrawInfo( const DrawInfo &original ) = delete;
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| 121 | DrawInfo & operator=( const DrawInfo &original ) = delete;
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| 122 | |||
| 123 | private:
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| 124 | const size_t mWaveIndex;
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| 125 | |||
| 126 | int32_t mWindowHeight; |
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| 127 | int32_t mWindowWidth; |
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| 128 | int32_t mSelectionBarHeight; |
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| 129 | |||
| 130 | float mShrinkFactor;
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| 131 | |||
| 132 | }; |