Collidoscope

#pragma once

#include "cinder/app/App.h"

#include "cinder/gl/gl.h"

#include "cinder/gl/Batch.h"

#include "Chunk.h"

#include "DrawInfo.h"

#ifdef USE_PARTICLES

#include "ParticleController.h"

#endif 

#include "cinder/Color.h"

#include "cinder/PolyLine.h"

#include "cinder/Rand.h"

#include <vector>

#include <map>

class DrawInfo;

typedef int SynthID;

using ci::ivec2;

using ci::vec2;

using ci::Color;

using ci::ColorA;

struct Cursor {

    static const int kNoPosition = -100;

    int pos;

    double lastUpdate;

};

class Wave

{

        friend class ParticleController;

public:

        class Selection {

        public:

        Selection( Wave * w, Color color );

        void setStart( size_t start );

                void setSize( size_t size );

        void inline setParticleSpread( float spread ){

            mParticleSpread = spread;

                }

                size_t getStart(void) const { return mSelectionStart; }

        size_t getEnd(void) const { return mSelectionEnd; }

                size_t inline getSize(void) const { 

                        if (mNull)

                                return 0;

                        else

                                return 1 + mSelectionEnd - mSelectionStart; 

                }

                float inline  getParticleSpread() const { return mParticleSpread; }

                inline void setToNull(){

            mParticleSpread = 1.0f;

                        mNull = true;

                }

                inline bool isNull() const{

                        return mNull;

                }

                inline const Color & getColor() const{

                        return mColor;

                }

    private:

        size_t mSelectionStart;

        size_t mSelectionEnd;

        float mParticleSpread;

        bool mNull = true;

        Color mColor;

        Wave * mWave;

        }; // class Selection

#ifdef USE_PARTICLES

        ParticleController mParticleController;

#endif 

        /* there is one cursor for each Synth being played */

        std::map < SynthID, Cursor > mCursors;

        std::vector<int> mCursorsPos;

public:

    // note used to identify the loop for cursor position 

    static const int kLoopNote = -1;

        static const cinder::Color CURSOR_CLR;

        /* must be in sync with supercollider durationFactor ControlSpec max */

        static const int MAX_DURATION = 8;

#ifdef USE_PARTICLES

        static const int PARTICLESIZE_COEFF = 40;

#endif

        void reset(bool onlyChunks);

        void setChunk(size_t index, float bottom, float top);

        const Chunk & getChunk(size_t index);

    inline void setCursorPos( SynthID id, int pos, const DrawInfo& di ){

            Cursor & cursor = mCursors[id];

            cursor.pos = pos;

            cursor.lastUpdate = ci::app::getElapsedSeconds();

#ifdef USE_PARTICLES

            /* if the duration is greater than 1.0 carry on the cursor as a particle

            the smaller the selection the more particles

            the bigger the duration the more particles */

            if (mSelection.getParticleSpread() > 1.0f){

                    /* amountCoeff ranges from 1/8 to 1 */

            const float amountCoeff = (mSelection.getParticleSpread() / MAX_DURATION);

            /* get radom point within seleciton as center of the particle */

            vec2 centrePoint; // was former getRandomPoint

            const int randomChunkIndex = ci::Rand::randInt(mSelection.getStart(), mSelection.getEnd() );

            centrePoint.x = di.flipX( 1 + (randomChunkIndex * (2 + Chunk::kWidth)) + Chunk::kWidth / 2 );

            centrePoint.y = di.flipY( di.audioToHeigt(0.0) );

            const float wavePixelLen = mNumChunks * ( 2 + Chunk::kWidth);

                    centrePoint.x *= float(di.getWindowWidth()) / wavePixelLen;

                    mParticleController.addParticles(

                std::max( 1, (int)(amountCoeff * ParticleController::kMaxParticleAdd * mFilterCoeff) ), // amount of particles to add 

                            centrePoint,

                mSelection.getParticleSpread() * PARTICLESIZE_COEFF   // size of the cloud 

                            );

            }

#endif

        }

    void update( double secondsPerChunk, const DrawInfo& di );

    void removeCursor( SynthID id ) { mCursors.erase( id ); }

    // parameter ranges from 0 to 1 

        inline void setselectionAlpha(float alpha){ mFilterCoeff = alpha;}

    void draw( const DrawInfo& di );

        Selection& getSelection() { return mSelection; };

        size_t getSize() const{ return mChunks.size();  }

        void setScopePoint(int index, float audioVal);

    Wave( size_t numChunks, Color selectionColor );

    // no copies 

    Wave( const Wave &copy ) = delete;

    Wave & operator=(const Wave &copy) = delete;

private:

    const size_t mNumChunks;

    std::vector<Chunk> mChunks;

    Selection mSelection;

    cinder::Color mColor;

    float mFilterCoeff;

    ci::gl::BatchRef mChunkBatch;

};