Collidoscope

#pragma once

#include "cinder/Color.h"

#include "cinder/gl/Batch.h"

class DrawInfo;

/**

 *

 * A chunk of audio in Collidoscope low-fi visual wave. 

 *

 * The visual wave of Collidoscope is made out of a number of bars that mimics in a low-fi fashion the typical waveform based representation of audio.

 * A Chunk is one of the bars of the visual wave. 

 *

 */

class Chunk

{

public:

    const static float kWidth;

    const static float kHalfWidth;

    /**

     * Constructor, takes as argument the index of this chunk in the wave

     */ 

        Chunk( size_t index );

    /**

     * Sets the top value of this chunk. The value is passed in audio coordinates : [-1.0, 1.0]

     */

    void inline setTop(float t) { mAudioTop = t; mAnimate = 0.0f; mResetting = false; /* startes the animation to crate a chunk */ }

    /**

     * Sets the bottom value of this chunk. The value is passed in audio coordinates : [-1.0, 1.0]

     */

    void inline setBottom(float b) { mAudioBottom = b; mAnimate = 0.0f; mResetting = false; }

    /**

     * Get the top value of this chunk. The value is returned in audio coordinates : [-1.0, 1.0]

     */

    float inline getTop() const { return mAudioTop; }

    /**

     * Get the bottom value of this chunk. The value is returned in audio coordinates : [-1.0, 1.0]

     */

    float inline getBottom() const { return mAudioBottom; }

    /**

     * Reset this chunks. When a chunk is reset it starts shrinking until it disappears.

     *

     */ 

        void reset(){

                mResetting = true;

        }

    /**

     * Called in the graphic loop. It update this chunk. 

     */ 

    void update( const DrawInfo& di );

    /**

     * Called in the graphic loop. It draws this chunk. 

     */ 

    void draw( const DrawInfo& di, ci::gl::BatchRef &batch );

    /**

     * Called in the graphic loop. It draws this chunk all the way to the bottom of the screen. 

     * This method is called when the chunk is the first or last in a selection. 

     */ 

    void drawBar( const DrawInfo& di, ci::gl::BatchRef &batch );

    /**

     * Informs this chunk that it's the first chunk of the selection.

     */ 

        void setAsSelectionStart(bool start){

                isSelectionStart = start;

        }

    /**

     * Informs this chunk that it's the last chunk of the selection.

     */ 

        void setAsSelectionEnd(bool end){

                isSelectionEnd = end;

        }

private:

    float mAudioTop;

    float mAudioBottom;

    float mX;

    float mAnimate = 1.0;

    int mIndex;

    bool isSelectionStart = false;

    bool isSelectionEnd = false;

    bool mResetting = false;

};