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1 #pragma once
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2
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3 #include "cinder/Area.h"
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4
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5 /**
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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 class DrawInfo
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13 {
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14 public:
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15
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16 /**
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17 * Constructor. Takes the index of the wave as argument.
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18 */
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19 DrawInfo( size_t waveIndex ):
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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
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27 /**
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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 void reset( const ci::Area &bounds, float shrinkFactor )
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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
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39 /**
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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 float audioToHeigt(float audioSample) const {
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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
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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
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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
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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
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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
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69 /**
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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 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
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80 /**
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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 int flipY(int y) const
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84 {
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85 if ( mWaveIndex == 0)
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86 return mWindowHeight - y;
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87 else
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88 return y;
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89 }
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90
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91 /**
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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 int flipX(int x) const
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96 {
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97 return x;
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98 }
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99
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100
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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
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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
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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
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117 /**
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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 DrawInfo( const DrawInfo &original ) = delete;
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121 DrawInfo & operator=( const DrawInfo &original ) = delete;
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122
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123 private:
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124 const size_t mWaveIndex;
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125
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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
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130 float mShrinkFactor;
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131
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132 };
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