void RepulsionApp::createSphere( gl::VboMesh &vbo, int res )
{
float X = 0.525731112119f;
float Z = 0.850650808352f;
static Vec3f verts[12] = {
Vec3f( -X, 0.0f, Z ), Vec3f( X, 0.0f, Z ), Vec3f( -X, 0.0f, -Z ), Vec3f( X, 0.0f, -Z ),
Vec3f( 0.0f, Z, X ), Vec3f( 0.0f, Z, -X ), Vec3f( 0.0f, -Z, X ), Vec3f( 0.0f, -Z, -X ),
Vec3f( Z, X, 0.0f ), Vec3f( -Z, X, 0.0f ), Vec3f( Z, -X, 0.0f ), Vec3f( -Z, -X, 0.0f ) };
static GLuint triIndices[20][3] = {
{0,4,1}, {0,9,4}, {9,5,4}, {4,5,8}, {4,8,1}, {8,10,1}, {8,3,10}, {5,3,8}, {5,2,3}, {2,7,3},
{7,10,3}, {7,6,10}, {7,11,6}, {11,0,6}, {0,1,6}, {6,1,10}, {9,0,11}, {9,11,2}, {9,2,5}, {7,2,11} };
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticNormals();
layout.setStaticColorsRGB();
mPosCoords.clear();
mNormals.clear();
mColors.clear();
float invWidth = 1.0f/(float)FBO_WIDTH;
float invHeight = 1.0f/(float)FBO_HEIGHT;
for( int x = 0; x < FBO_WIDTH; ++x ) {
for( int y = 0; y < FBO_HEIGHT; ++y ) {
float u = ( (float)x + 0.5f ) * invWidth;
float v = ( (float)y + 0.5f ) * invHeight;
Colorf c = Colorf( u, v, 0.0f );
for( int i=0; i<20; i++ ){
drawSphereTri( verts[triIndices[i][0]], verts[triIndices[i][1]], verts[triIndices[i][2]], res, c );
}
}
}
vbo = gl::VboMesh( mPosCoords.size(), 0, layout, GL_TRIANGLES );
vbo.bufferPositions( mPosCoords );
vbo.bufferNormals( mNormals );
vbo.bufferColorsRGB( mColors );
vbo.unbindBuffers();
}
void CatalogApp::initFaintVbo()
{
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticColorsRGB();
int numFaintStars = mFaintStars.size();
mFaintVbo = gl::VboMesh( numFaintStars, 0, layout, GL_POINTS );
vector<Vec3f> positions;
vector<Color> colors;
for( int i=0; i<numFaintStars; i++ ){
positions.push_back( mFaintStars[i]->mPos );
colors.push_back( Color( mFaintStars[i]->mColor, 0.0f, 0.0f ) );
}
mFaintVbo.bufferPositions( positions );
mFaintVbo.bufferColorsRGB( colors );
mFaintVbo.unbindBuffers();
}
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.setEyePoint( Vec3f(-kWidth/4, kHeight/2, -kWidth/8) );
mCamera.setCenterOfInterestPoint( Vec3f(kWidth/4, -kHeight/8, kWidth/4) );
// 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 );
mTextureFormat.setWrapT( GL_REPEAT );
mTextureFormat.setMinFilter( GL_LINEAR );
mTextureFormat.setMagFilter( GL_LINEAR );
// compile shader
try {
mShader = gl::GlslProg( 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<Vec3f> vertices;
std::vector<Colorf> colors;
std::vector<Vec2f> coords;
std::vector<size_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 = vertices.size();
indices.push_back(offset);
indices.push_back(offset+kWidth);
indices.push_back(offset+kWidth+1);
indices.push_back(offset);
indices.push_back(offset+kWidth+1);
indices.push_back(offset+1);
}
// add vertex
vertices.push_back( Vec3f(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.push_back( Vec2f(part - part * s, t) );
// add vertex colors
colors.push_back( Color(CM_HSV, s, 0.5f, 0.75f) );
}
}
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticColorsRGB();
layout.setStaticIndices();
layout.setStaticTexCoords2d();
mMesh = gl::VboMesh(vertices.size(), indices.size(), layout, GL_TRIANGLES);
mMesh.bufferPositions(vertices);
mMesh.bufferColorsRGB(colors);
mMesh.bufferIndices(indices);
mMesh.bufferTexCoords2d(0, coords);
// 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 CatalogApp::initBrightVbo()
{
gl::VboMesh::Layout layout;
layout.setStaticPositions();
layout.setStaticTexCoords2d();
layout.setStaticColorsRGB();
int numVertices = FBO_WIDTH * FBO_HEIGHT;
// 1 quad per particle
// 2 triangles make up the quad
// 3 points per triangle
mBrightVbo = gl::VboMesh( numVertices * 2 * 3, 0, layout, GL_TRIANGLES );
float s = 0.5f;
Vec3f p0( -s, -s, 0.0f );
Vec3f p1( -s, s, 0.0f );
Vec3f p2( s, s, 0.0f );
Vec3f p3( s, -s, 0.0f );
Vec2f t0( 0.0f, 0.0f );
Vec2f t1( 0.0f, 1.0f );
Vec2f t2( 1.0f, 1.0f );
Vec2f t3( 1.0f, 0.0f );
vector<Vec3f> positions;
vector<Vec2f> texCoords;
vector<Color> colors;
for( int x = 0; x < FBO_WIDTH; ++x ) {
for( int y = 0; y < FBO_HEIGHT; ++y ) {
float u = (float)x/(float)FBO_WIDTH;
float v = (float)y/(float)FBO_HEIGHT;
Color c = Color( u, v, 0.0f );
positions.push_back( p0 );
positions.push_back( p1 );
positions.push_back( p2 );
texCoords.push_back( t0 );
texCoords.push_back( t1 );
texCoords.push_back( t2 );
colors.push_back( c );
colors.push_back( c );
colors.push_back( c );
positions.push_back( p0 );
positions.push_back( p2 );
positions.push_back( p3 );
texCoords.push_back( t0 );
texCoords.push_back( t2 );
texCoords.push_back( t3 );
colors.push_back( c );
colors.push_back( c );
colors.push_back( c );
}
}
mBrightVbo.bufferPositions( positions );
mBrightVbo.bufferTexCoords2d( 0, texCoords );
mBrightVbo.bufferColorsRGB( colors );
mBrightVbo.unbindBuffers();
}