void AudioVisualizerApp::setup()
{
// initialize signals
signalChannelEnd = false;
// make a list of valid audio file extensions and initialize audio variables
const char* extensions[] = { "mp3", "wav", "ogg" };
mAudioExtensions = vector<string>( extensions, extensions + 2 );
mAudioPath = getAssetPath( "" );
mIsAudioPlaying = false;
// setup camera
mCamera.setPerspective( 50.0f, 1.0f, 1.0f, 10000.0f );
mCamera.lookAt( vec3( -kWidth / 4, kHeight / 2, -kWidth / 8 ), vec3( kWidth / 4, -kHeight / 8, kWidth / 4 ) );
mCameraUi.setCamera( &mCamera );
// create channels from which we can construct our textures
mChannelLeft = Channel32f( kBands, kHistory );
mChannelRight = Channel32f( kBands, kHistory );
memset( mChannelLeft.getData(), 0, mChannelLeft.getRowBytes() * kHistory );
memset( mChannelRight.getData(), 0, mChannelRight.getRowBytes() * kHistory );
// create texture format (wrap the y-axis, clamp the x-axis)
mTextureFormat.setWrapS( GL_CLAMP_TO_BORDER );
mTextureFormat.setWrapT( GL_REPEAT );
mTextureFormat.setMinFilter( GL_LINEAR );
mTextureFormat.setMagFilter( GL_LINEAR );
mTextureFormat.loadTopDown( true );
// compile shader
try {
mShader = gl::GlslProg::create( loadAsset( "shaders/spectrum.vert" ), loadAsset( "shaders/spectrum.frag" ) );
}
catch( const std::exception& e ) {
console() << e.what() << std::endl;
quit();
return;
}
// create static mesh (all animation is done in the vertex shader)
std::vector<vec3> positions;
std::vector<Colorf> colors;
std::vector<vec2> coords;
std::vector<uint32_t> indices;
for( size_t h = 0; h < kHeight; ++h ) {
for( size_t w = 0; w < kWidth; ++w ) {
// add polygon indices
if( h < kHeight - 1 && w < kWidth - 1 ) {
size_t offset = positions.size();
indices.emplace_back( offset );
indices.emplace_back( offset + kWidth );
indices.emplace_back( offset + kWidth + 1 );
indices.emplace_back( offset );
indices.emplace_back( offset + kWidth + 1 );
indices.emplace_back( offset + 1 );
}
// add vertex
positions.emplace_back( vec3( float( w ), 0, float( h ) ) );
// add texture coordinates
// note: we only want to draw the lower part of the frequency bands,
// so we scale the coordinates a bit
const float part = 0.5f;
float s = w / float( kWidth - 1 );
float t = h / float( kHeight - 1 );
coords.emplace_back( vec2( part - part * s, t ) );
// add vertex colors
colors.emplace_back( Color( CM_HSV, s, 0.5f, 0.75f ) );
}
}
gl::VboMesh::Layout layout;
layout.usage( GL_STATIC_DRAW );
layout.attrib( geom::Attrib::POSITION, 3 );
layout.attrib( geom::Attrib::COLOR, 3 );
layout.attrib( geom::Attrib::TEX_COORD_0, 2 );
mMesh = gl::VboMesh::create( positions.size(), GL_TRIANGLES, { layout }, indices.size(), GL_UNSIGNED_INT );
mMesh->bufferAttrib( geom::POSITION, positions.size() * sizeof( vec3 ), positions.data() );
mMesh->bufferAttrib( geom::COLOR, colors.size() * sizeof( vec3 ), colors.data() );
mMesh->bufferAttrib( geom::TEX_COORD_0, coords.size() * sizeof( vec2 ), coords.data() );
mMesh->bufferIndices( indices.size() * sizeof( uint32_t ), indices.data() );
// play audio using the Cinder FMOD block
FMOD::System_Create( &mFMODSystem );
mFMODSystem->init( 32, FMOD_INIT_NORMAL | FMOD_INIT_ENABLE_PROFILE, NULL );
mFMODSound = nullptr;
mFMODChannel = nullptr;
playAudio( findAudio( mAudioPath ) );
mIsMouseDown = false;
mMouseUpDelay = 30.0;
mMouseUpTime = getElapsedSeconds() - mMouseUpDelay;
// the texture offset has two purposes:
// 1) it tells us where to upload the next spectrum data
// 2) we use it to offset the texture coordinates in the shader for the scrolling effect
mOffset = 0;
}
void FiretrailApp::setup()
{
mCamera.lookAt(vec3(.0f, .0f, -1.0f), vec3(.0f));
mParams = params::InterfaceGl::create( getWindow(), "App parameters", toPixels( ivec2( 200, 300 ) ) );
mParams->addParam("FPS", &mFps);
mParams->addParam("Max D Slice", &mMaxDSlice);
mParams->addParam("Time Factor", &mTimeFactor);
mParams->addParam("Gain", &mGain ).updateFn( [this] { mGlsl->uniform("gain", mGain);} );
mParams->addParam("Lacunarity", &mLacunarity).updateFn( [this] { mGlsl->uniform("lacunarity", mLacunarity);} );
mParams->addParam("Magnitude", &mMagnitude ).updateFn( [this] { mGlsl->uniform("magnitude", mMagnitude);} );
mParams->addParam("Frag Mul", &mFragMul ).updateFn( [this] { mGlsl->uniform("fragMul", mFragMul);} );
mParams->addParam("Noise Scale", &mNoiseScale).updateFn( [this] { mGlsl->uniform("noiseScale", mNoiseScale);} );
mParams->addParam("Layer Offset", &mLayerOffset).updateFn( [this] { mGlsl->uniform("layerOffset", mLayerOffset);} );
mParams->addButton("Start Recording", [this]
{
if (!mRecordingMovie) startMovieRecording();
});
mParams->addButton("End Recording", [this]
{
if (mRecordingMovie) endMovieRecording();
});
gl::Texture::Format mTexFormat;
mTexFormat.magFilter( GL_LINEAR ).minFilter( GL_LINEAR ).internalFormat( GL_RGBA );//.wrap(GL_REPEAT);
mFireTex = gl::Texture::create( loadImage( loadAsset( "flame6.png" ) ), mTexFormat );
mTexFormat.wrap(GL_REPEAT);
mNoiseTex = gl::Texture::create( loadImage( loadAsset( "nzw.png" ) ), mTexFormat );
mGlsl = gl::GlslProg::create(gl::GlslProg::Format()
.vertex( loadAsset( "fire.vert" ) )
.fragment( loadAsset( "fire.frag" ) )
.geometry( loadAsset( "fire.geom" )).attrib( geom::CUSTOM_0, "vSize" ) );
mGlsl->uniform("fireTex", 0);
mGlsl->uniform("noiseTex", 1);
mGlsl->uniform("fragMul", mFragMul);
mGlsl->uniform("gain", mGain);
mGlsl->uniform("magnitude", mMagnitude);
mGlsl->uniform("lacunarity", mLacunarity);
mGlsl->uniform("noiseScale", mNoiseScale);
mGlsl->uniform("layerOffset", mLayerOffset);
// compute texture coordinates
vector<float> amp( NUM_SPLINE_NODES );
amp.resize(NUM_SPLINE_NODES);
for (size_t i = 0; i < NUM_SPLINE_NODES; ++i)
{
const auto t = (float)i / (float)(NUM_SPLINE_NODES - 1);
amp[i] = 1.0f - easeInOutSine(t);
}
mVboMesh = gl::VboMesh::create( NUM_SPLINE_NODES, GL_POINTS, {
gl::VboMesh::Layout().usage( GL_DYNAMIC_DRAW ).attrib( geom::POSITION, 3 ),
gl::VboMesh::Layout().usage( GL_STATIC_DRAW ).attrib( geom::Attrib::CUSTOM_0, 1 ),
});
mVboMesh->bufferAttrib(geom::Attrib::CUSTOM_0, amp);
mBatch = gl::Batch::create(mVboMesh, mGlsl);
resize();
}