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@5: 
f@0: #include "Chunk.h"
f@0: #include "DrawInfo.h"
f@0: 
f@0: 
f@0: #include "cinder/gl/gl.h"
f@0: 
f@0: 
f@0: Chunk::Chunk( size_t index ) :
f@0:     mIndex( index ),
f@0:     mAudioTop(0.0f),
f@0:     mAudioBottom(0.0f)
f@0:     {}
f@0: 
f@0: 
f@0: void update( const DrawInfo& di )
f@0: {
f@0: 
f@0: }
f@0: 
f@0: void Chunk::update( const DrawInfo &di )
f@0: {
f@0:     using namespace ci;
f@16:     /* if resetting animate the chunks to nicely shrink to 0 size */
f@0:     if ( mResetting ){
f@0:         if ( mAnimate > 0.0f ){
f@0:             mAnimate -= 0.1f;
f@0:             if ( mAnimate <= 0.0f ){
f@0:                 mAnimate = 0.0f;
f@0:                 mResetting = false;
f@0:                 mAudioTop = 0.0f;
f@0:                 mAudioBottom = 0.0f;
f@0:             }
f@0:         }
f@0:     }
f@0:     /* animate makes the chunks pop nicely when they are created */
f@0:     else if ( mAnimate < 1.0f ){
f@0:         mAnimate += 0.3333f; // in three (namely 1/0.333) steps
f@0:         if ( mAnimate > 1.0f ){ // clip to one
f@0:             mAnimate = 1.0f;
f@0:         }
f@0:     }
f@0: 
f@16:     mX = di.flipX( 1 + (mIndex * (2 + kWidth)) ); // FIXME more efficient if it happens only once when resized 
f@0: }
f@0: 
f@0: void Chunk::draw( const DrawInfo& di, ci::gl::BatchRef &batch ){
f@0:     using namespace ci;
f@5:     
f@0:     gl::pushModelMatrix();
f@0: 
f@0:     const float chunkHeight = mAnimate * mAudioTop * di.getMaxChunkHeight();
f@0: 
f@16:     // place the chunk in the right position brings back the y of chunkHeight/2 so
f@0:     // so that after scaling the wave is still centered at the wave center 
f@0:     gl::translate( mX, di.getWaveCenterY() - ( chunkHeight / 2 ) - 1 );
f@0: 
f@0:     // scale according to audio amplitude 
f@0:     gl::scale( 1.0f, chunkHeight );
f@0:     batch->draw();
f@0:     
f@0:     
f@0:     gl::popModelMatrix();
f@0: }
f@0: 
f@0: 
f@0: void Chunk::drawBar( const DrawInfo& di, ci::gl::BatchRef &batch ){
f@5:     using namespace ci;
f@0: 
f@0:     gl::pushModelMatrix();
f@0: 
f@0:     const float barHeight = di.getSelectionBarHeight();
f@0: 
f@0:     gl::translate( mX, di.getWaveCenterY() - ( barHeight / 2 ) - 1 );
f@0:     gl::scale( 1.0f, barHeight );
f@0: 
f@0:     batch->draw();
f@0: 
f@0:     gl::popModelMatrix();
f@0: }
f@0: 
f@0: 
f@0: const float Chunk::kWidth = 7.0f;
f@5: const float Chunk::kHalfWidth = 3.5f;