Revision 4:ab6db404403a CollidoscopeApp/src

View differences:

CollidoscopeApp/src/ParticleController.cpp
10 10 
mNumParticles( 0 )
11 11 

  		




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{


  		




  
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    // uses Cinder (and OpenGL) virtual buffer object based drawing


  		




  
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    // see ParticleSphereCPU example in Cinder library 


  		




  
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    mParticles.assign( kMaxParticles, Particle() );


  		




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    mParticlePositions.assign( kMaxParticles, vec2( -1, -1 ) );


  		




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  ......




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    auto mesh = gl::VboMesh::create( mParticlePositions.size(), GL_POINTS, { { particleLayout, mParticleVbo } } );


  		




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    // creates glsl program to run the batch with 


  		




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#if ! defined( CINDER_GL_ES )


  		




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    auto glsl = gl::GlslProg::create( gl::GlslProg::Format()


  		




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        .vertex( CI_GLSL( 150,


  		




  ......




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void ParticleController::updateParticles()


  		




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{


  		




  
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    // update the positions of the particles and dispose them if they're reached their timespan


  		




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    for ( size_t i = 0; i < mNumParticles; i++ ){


  		




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        Particle &particle = mParticles[i];


  		




  ......




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        }


  		




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    }


  		




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    // Copy particle data onto the GPU.


  		




  
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	// Map the GPU memory and write over it.


  		




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    void *gpuMem = mParticleVbo->mapReplace();


  		




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    memcpy( gpuMem, mParticlePositions.data(), mParticlePositions.size() * sizeof( vec2 ) );


  		




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    mParticleVbo->unmap();


  		




  ......




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void ParticleController::addParticles(int amount, const vec2 &initialLocation, const float cloudSize)


  		




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{


  		




  
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    // reduce the particles liearly to the total number of particles already present 


  		




  
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    // the more particles aleary present the less particle are added


  		




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    int reduction = ci::lmap<int>(mNumParticles, 0, kMaxParticles, 0, kMaxParticleAdd);


  		




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    amount -= reduction;


  		




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    if ( mNumParticles + amount > kMaxParticles ){


  		




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		//return;


  		




  
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		//a.k.a. return if reached kMaxParticles 


  		




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        amount = kMaxParticles - mNumParticles;


  		




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	}


  		




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      CollidoscopeApp/src/Wave.cpp
    
  





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		mChunks.emplace_back( i );


  		




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	}


  		




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    // init cinder batch drawing


  		




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    auto lambert = gl::ShaderDef().color();


  		




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    gl::GlslProgRef shader = gl::getStockShader( lambert );


  		




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    mChunkBatch = gl::Batch::create( geom::Rect( ci::Rectf( 0, 0, Chunk::kWidth, 1 ) ), shader );


  		




  ......




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        double elapsed = now - itr->second.lastUpdate;


  		




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        // A chunk of audio corresponds to a certain time according to sample rate.


  		




  
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        // Use elapsed time to advance through chunks so that the cursor is animated 


  		




  
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        // and goes from start to end of the seleciton in the time span of the grain 


  		




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        itr->second.pos = mSelection.getStart() + int( elapsed / secondsPerChunk );


  		




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        /* check we don't go too far off */


  		




  
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        // check we don't go too far off 


  		




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        if (itr->second.pos > mSelection.getEnd()){


  		




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            itr->second.pos = Cursor::kNoPosition;


  		




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        }


  		












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