f@5: /*
f@5: 
f@5:  Copyright (C) 2015  Fiore Martin
f@5:  Copyright (C) 2016  Queen Mary University of London 
f@5:  Author: Fiore Martin
f@5: 
f@5:  This file is part of Collidoscope.
f@5:  
f@5:  Collidoscope is free software: you can redistribute it and/or modify
f@5:  it under the terms of the GNU General Public License as published by
f@5:  the Free Software Foundation, either version 3 of the License, or
f@5:  (at your option) any later version.
f@5: 
f@5:  This program is distributed in the hope that it will be useful,
f@5:  but WITHOUT ANY WARRANTY; without even the implied warranty of
f@5:  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
f@5:  GNU General Public License for more details.
f@5: 
f@5:  You should have received a copy of the GNU General Public License
f@5:  along with this program.  If not, see <http://www.gnu.org/licenses/>.
f@5: 
f@5: */
f@5: 
f@0: 
f@0: #pragma once
f@0: 
f@0: #include "cinder/Color.h"
f@0: #include "cinder/gl/Batch.h"
f@0: 
f@0: class DrawInfo;
f@0: 
f@2: /**
f@2:  *
f@2:  * A chunk of audio in Collidoscope low-fi visual wave. 
f@2:  *
f@16:  * The visual wave of Collidoscope is made out of a number of bars that mimic, in a low-fi fashion, the typical waveform-based representation of audio.
f@2:  * A Chunk is one of the bars of the visual wave. 
f@2:  *
f@2:  */
f@2: 
f@0: class Chunk
f@0: {
f@0: 
f@0: public:
f@0: 
f@0:     const static float kWidth;
f@0:     const static float kHalfWidth;
f@0: 
f@2:     /**
f@16:      * Constructor, takes as argument the index of this chunk in the wave that contains it
f@2:      */ 
f@5:     Chunk( size_t index );
f@0: 
f@2:     /**
f@2:      * Sets the top value of this chunk. The value is passed in audio coordinates : [-1.0, 1.0]
f@2:      */
f@0:     void inline setTop(float t) { mAudioTop = t; mAnimate = 0.0f; mResetting = false; /* startes the animation to crate a chunk */ }
f@2:     /**
f@2:      * Sets the bottom value of this chunk. The value is passed in audio coordinates : [-1.0, 1.0]
f@2:      */
f@0:     void inline setBottom(float b) { mAudioBottom = b; mAnimate = 0.0f; mResetting = false; }
f@2:     /**
f@2:      * Get the top value of this chunk. The value is returned in audio coordinates : [-1.0, 1.0]
f@2:      */
f@0:     float inline getTop() const { return mAudioTop; }
f@2:     /**
f@2:      * Get the bottom value of this chunk. The value is returned in audio coordinates : [-1.0, 1.0]
f@2:      */
f@0:     float inline getBottom() const { return mAudioBottom; }
f@0: 
f@2:     /**
f@16:      * Reset this chunks. When a chunk is reset, it starts shrinking until it disappears or setTop/setBottom are called again
f@2:      *
f@2:      */ 
f@5:     void reset(){
f@5:         mResetting = true;
f@5:     }
f@0: 
f@2:     /**
f@2:      * Called in the graphic loop. It update this chunk. 
f@2:      */ 
f@0:     void update( const DrawInfo& di );
f@0: 
f@2:     /**
f@2:      * Called in the graphic loop. It draws this chunk. 
f@2:      */ 
f@0:     void draw( const DrawInfo& di, ci::gl::BatchRef &batch );
f@0: 
f@2:     /**
f@2:      * Called in the graphic loop. It draws this chunk all the way to the bottom of the screen. 
f@2:      * This method is called when the chunk is the first or last in a selection. 
f@2:      */ 
f@0:     void drawBar( const DrawInfo& di, ci::gl::BatchRef &batch );
f@0: 
f@2:     /**
f@2:      * Informs this chunk that it's the first chunk of the selection.
f@2:      */ 
f@5:     void setAsSelectionStart(bool start){
f@5:         isSelectionStart = start;
f@5:     }
f@0: 
f@2:     /**
f@2:      * Informs this chunk that it's the last chunk of the selection.
f@2:      */ 
f@5:     void setAsSelectionEnd(bool end){
f@5:         isSelectionEnd = end;
f@5:     }
f@0: 
f@0: private:
f@0: 
f@0:     float mAudioTop;
f@0:     float mAudioBottom;
f@0: 
f@0:     float mX;
f@0: 
f@0:     float mAnimate = 1.0;
f@0:     int mIndex;
f@0: 
f@0:     bool isSelectionStart = false;
f@0:     bool isSelectionEnd = false;
f@0: 
f@0:     bool mResetting = false;
f@0: 
f@0: };