void Corrdinate_spacesApp::setup()
{
vector<Vec3f> positions;
vector<uint32_t> indices;
positions.push_back( Vec3f( -1, 1, 0) ); //0
positions.push_back( Vec3f( -1, -1, 0) ); //1
positions.push_back( Vec3f( 1, -1, 0) ); //2
positions.push_back( Vec3f( 1, 1, 0) ); //3
indices.push_back(1);
indices.push_back(3);
indices.push_back(0);
indices.push_back(1);
indices.push_back(2);
indices.push_back(3);
// mMesh.appendVertices(positions.data(), positions.size());
// mMesh.appendIndices(indices.data(), indices.size());
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticIndices();
mVboMesh = gl::VboMesh::create( 4, 6, layout, GL_TRIANGLES );
mVboMesh->bufferPositions(positions);
mVboMesh->bufferIndices(indices);
mVboMesh->unbindBuffers();
mCam.setPerspective(60, getWindowAspectRatio(), .1, 10000);
mCam.lookAt( Vec3f(0,0,5), Vec3f(0,0,0), Vec3f::yAxis() );
}
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;
}
