// We can invert the image by subtracting each R,G,B value from 255
void invertArea( Surface *surface, Area area )
{
Surface::Iter iter = surface->getIter( area );
while( iter.line() ) {
while( iter.pixel() ) {
iter.r() = 255 - iter.r();
iter.g() = 255 - iter.g();
iter.b() = 255 - iter.b();
}
}
}
void BuddhabrotApp::update()
{
runBrot();
Surface::Iter iter = mSurface.getIter();
int x = 0;
int y = 0;
int index;
while( iter.line() ) {
y = iter.y();
while( iter.pixel() ) {
x = iter.x();
index = y * TEXTURE_WIDTH + x;
double r = 0;
double g = 0;
double b = 0;
int rMax = mVMaxR;
while( rMax > 0 && mRedHistory[ rMax ] <= 4 ){
rMax --;
}
int gMax = mVMaxG;
while( gMax > 0 && mGreenHistory[ gMax ] <= 4 ){
gMax --;
}
int bMax = mVMaxB;
while( bMax > 0 && mBlueHistory[ bMax ] <= 4 ){
bMax --;
}
if( rMax > 0 ){
r = (double)mRedBuffer[index]/(double)rMax;
if( r > 1 ) r = 1;
}
if( gMax > 0 ){
g = (double)mGreenBuffer[index]/(double)gMax;
if( g > 1 ) g = 1;
}
if( bMax > 0 ){
b = (double)mBlueBuffer[index]/(double)bMax;
if( b > 1 ) b = 1;
}
iter.r() = (int)( r * 255 );
iter.g() = (int)( g * 255 );
iter.b() = (int)( b * 255 );
}
}
mTexture = gl::Texture( mSurface );
}
void _repeat(Surface& source, Surface& dest, int scaleFactor)
{
Surface::ConstIter srcIt = source.getIter();
Surface::Iter destIt = dest.getIter();
while (srcIt.line())
{
// back to the start of source line
Surface::ConstIter copy = srcIt;
for (int i = 0; i < scaleFactor; i++)
{
destIt.line();
while (srcIt.pixel())
{
for (int j = 0; j < scaleFactor; j++)
{
destIt.pixel();
destIt.r() = srcIt.r();
destIt.g() = srcIt.g();
destIt.b() = srcIt.b();
}
}
// reset srcIt
srcIt = copy;
}
}
}
void Video::update()
{
if( mMovie.checkPlayable() ){
Area area = mMovie.getSurface().getBounds();
mFrameSurface = ci::Surface(area.getWidth(), area.getHeight(), true);
mFrameSurface.copyFrom(mMovie.getSurface(), mFrameSurface.getBounds() );
/*
mFrameSurface = ci::Surface(mMovie.getSurface());
mFrameTexture = gl::Texture(mFrameSurface, mFrameFormat);
*/
Surface::Iter iter = mFrameSurface.getIter( mFrameSurface.getBounds() );
while( iter.line() ) {
while( iter.pixel() ) {
//if (iter.b() > 50 && iter.r() < 50 && iter.g() < 50){
if (iter.g() > 50 && iter.g() > iter.r() && iter.g() > iter.b()){
//std::cout << "yes" << std::endl;
//iter.r() = 0;
//iter.g() = 0;
//iter.b() = 0;
iter.a() = 0;
}
else{
iter.a() = 255;
//std::cout << "no" << std::endl;
}
}
}
//mFrameSurface = ci::Surface( loadImage( loadResource( "bomb.png")) );
mFrameTexture = gl::Texture(mFrameSurface, mFrameFormat);
}
//mCenteredRect = Rectf( mFrameTexture.getBounds() ).getCenteredFit( getWindowBounds(), true );
mCenteredRect = Rectf(-40,0,800,600);
}
/**
* Apply Rainbow-Crush Distortion
* @param intensity a double-precision number between 0 and 1
*/
void distortion::applyRainbowCrush(const double intensity) {
Surface::Iter iter = mSurface.getIter();
// int a = time(0);
int t = 0;
while (iter.line()) {
while (iter.pixel()) {
t++;
iter.rClamped(0, 0) = iter.gClamped(7, 3);
iter.gClamped(0, 0) = iter.rClamped(7, 1);
iter.bClamped(0, 0) = iter.bClamped(7, 2);
}
}
app::console() << t << "\n";
}
void PerlinContent::generateNoiseForPosition(const ci::Vec2f & position)
{
Surface::Iter iter = mNoiseSurface.getIter();
while( iter.line() )
{
while( iter.pixel() )
{
//float v = mPerlin.noise(((iter.x() + position.x) * mFrequency),
//((iter.y() + position.y) * mFrequency));
//float val = 0.5 + v;
float val = getValueAtPosition(Vec2f(iter.x() + position.x,
iter.y() + position.y));
iter.r() = iter.g() = iter.b() = ci::math<int>::clamp(val * 255, 0, 255);
}
}
}
void Item::setColors()
{
Surface::Iter iter = mPalette.getIter();
while( iter.line() ) {
while( iter.pixel() ) {
int index = iter.x();
Color col( iter.r()/255.0f, iter.g()/255.0f, iter.b()/255.0f );
vec2 pos = vec2( index%4, floor(index/4.0f) ) * 5.0f - vec2( 12.0f, 8.0f );
Rectf rect( -2.0f, -2.0f, 2.0f, 2.0f );
Swatch swatch( col, mTitleStart + pos + vec2( -10.0f, 10.0f ), rect );
mSwatches.push_back( swatch );
}
}
}
void cApp::loadColorSample( fs::path filepath, vector<Colorf>& col){
Surface sur( loadImage( filepath ) );
Surface::Iter itr = sur.getIter();
while ( itr.line() ) {
while ( itr.pixel() ) {
float r = itr.r() / 255.0f;
float g = itr.g() / 255.0f;
float b = itr.b() / 255.0f;
col.push_back( Colorf(r,g,b) );
}
}
cout << "Load Success: " << col.size() << " ColorSample" << endl;
}
void ocvColorQuantizeApp::updateImage()
{
const int colorCount = 32;
const int sampleCount = mInputImage.getHeight() * mInputImage.getWidth();
cv::Mat colorSamples( sampleCount, 1, CV_32FC3 );
// build our matrix of samples
Surface::ConstIter imageIt = mInputImage.getIter();
cv::MatIterator_<cv::Vec3f> sampleIt = colorSamples.begin<cv::Vec3f>();
while( imageIt.line() )
while( imageIt.pixel() )
*sampleIt++ = cv::Vec3f( imageIt.r(), imageIt.g(), imageIt.b() );
// call kmeans
cv::Mat labels, clusters;
cv::kmeans( colorSamples, colorCount, labels, cv::TermCriteria( cv::TermCriteria::COUNT, 8, 0 ), 2, cv::KMEANS_RANDOM_CENTERS, &clusters );
Color8u clusterColors[colorCount];
for( int i = 0; i < colorCount; ++i )
clusterColors[i] = Color8u( clusters.at<cv::Vec3f>(i,0)[0], clusters.at<cv::Vec3f>(i,0)[1], clusters.at<cv::Vec3f>(i,0)[2] );
Surface result( mInputImage.getWidth(), mInputImage.getHeight(), false );
Surface::Iter resultIt = result.getIter();
cv::MatIterator_<int> labelIt = labels.begin<int>();
while( resultIt.line() ) {
while( resultIt.pixel() ) {
resultIt.r() = clusterColors[*labelIt].r;
resultIt.g() = clusterColors[*labelIt].g;
resultIt.b() = clusterColors[*labelIt].b;
++labelIt;
}
}
// draw the color palette across the bottom of the image
const int swatchSize = 12;
for( int i = 0; i < colorCount; ++i ) {
ip::fill( &result, clusterColors[i], Area( i * swatchSize, result.getHeight() - swatchSize, ( i + 1 ) * swatchSize, result.getHeight() ) );
}
mTexture = gl::Texture( result );
}
void VectorBlur::drawArrowMap()
{
gl::ScopedColor blue(Color(0, 0, 1));
Surface pix(fboBlurMap->getColorTexture()->createSource());
int inc = 8;
float arrowLength = 5.0f;
Surface::Iter iter = pix.getIter(fboBlurMap->getBounds());
while (iter.line()) {
while (iter.pixel()) {
ivec2 pos = iter.getPos();
if (pos.x%inc == 0 && pos.y%inc == 0) {
vec2 dir(iter.r(), iter.g());
dir = dir / 255.0f * 2.0f - vec2(1, 1);
glm::normalize(dir);
vec2 p0 = pos;
vec2 p1 = p0 + dir*arrowLength;
gl::drawLine(p0, p1);
}
}
}
}
// We can create a thresholded image by taking the grayscale value of each pixel and assigning the
// result to be black for gray <= 50%, and white for gray > 50%
void thresholdArea( Surface *surface, Area area )
{
Surface::Iter iter = surface->getIter( area );
while( iter.line() ) {
while( iter.pixel() ) {
// this is not the best way to determine grayscale - see CHANTRAIT<>::grayscale()
uint8_t gray = ( iter.r() + iter.g() + iter.b() ) / 3;
if( gray > 128 )
iter.r() = iter.g() = iter.b() = 255;
else
iter.r() = iter.g() = iter.b() = 0;
}
}
}
void FrownLogoParticlesApp::setup()
{
mKeyPressed = false;
// Lets load a font from the the installed fonts of the OS
// and set its size to 90
mFont = Font("Arial",90 );
//Clear the layout to black
mLayout.clear(Color::black() );
//Set the text color of the layout
mLayout.setColor(Color(1,1,1));
//Set the font of the layout
mLayout.setFont(mFont);
//Add the following line to the layout
mLayout.addLine("FROWN");
//Render the layout into a cinder Surface
mSurface = mLayout.render();
//We will now iterate through every pixel in the surface:
//First get the iterator
Surface::Iter iter = mSurface.getIter();
// For every line in the surface
//
while ( iter.line() )
{
// For every pixel in the line
while (iter.pixel()) {
//Check if the color of the current pixel is not black
if ( ( iter.r() != 0.0f ) && ( iter.g() != 0.0f ) && ( iter.b() != 0.0f ) )
{
//If its not black, push the position of the pixel into
// the initial positions
mInitialPositions.push_back(ci::Vec2f(iter.x(), iter.y()));
// Also, lets make the current positions equal to the initial
// ones
mCurrentPositions.push_back(ci::Vec2f(iter.x(), iter.y()));
//lets also keep the color of every pixel
mPixelColors.push_back(Colorf(iter.r(), iter.g(), iter.b()));
}
}
}
//Print the size of non-black pixels found in the surface
console() << "We found " << mInitialPositions.size() <<
" non black pixels" << endl;
console() << "Spacebar changes: explode /move back" << endl;
console() << "P or p changes: whether the particles are paused or not" << endl;
}
void HodginDidItApp::processDepth()
{
mPoints.clear();
Surface::Iter sit = mSurfDepth.getIter(Area(0,0,mDepthW,mDepthH));
while(sit.line())
{
while(sit.pixel())
{
float cDepth = (float)mDepthBuffer[sit.y()*mDepthW+sit.x()];
sit.r() = 0;
sit.g() = 0;
sit.b() = 0;
sit.a() = 0;
if(cDepth<32000)
{
float cScaled = cDepth/1000.0f;
if(cDepth<300)
{
uint8_t v = (uint8_t)lmap<float>(cDepth,0,300,0,255);
sit.r() = v;
sit.a() = v;
}
if(sit.x()%2==0&&sit.y()%2==0)
mPoints.push_back(niDepthToWorld(Vec3f(sit.x(),sit.y(),1.0f*cScaled)));
}
}
}
}
void CinderOpenNISkeleton::setDepthSurface() {
int texWidth = gCinderOpenNISkeleton->mDepthMD.XRes();
int texHeight = gCinderOpenNISkeleton->mDepthMD.YRes();
const XnDepthPixel* pDepth = gCinderOpenNISkeleton->mDepthMD.Data();
const XnLabel* pLabels = gCinderOpenNISkeleton->mSceneMD.Data();
// Calculate the accumulative histogram - whatever that means
memset(gCinderOpenNISkeleton->pDepthHist, 0, MAX_DEPTH*sizeof(float));
unsigned int nX = 0;
unsigned int nValue = 0;
unsigned int nIndex = 0;
unsigned int nY = 0;
unsigned int nNumberOfPoints = 0;
unsigned int nHistValue = 0;
if(!gCinderOpenNISkeleton->bInitialized)
{
gCinderOpenNISkeleton->pDepthTexBuf = new unsigned char[texWidth*texHeight*3];
app::console() << "Initialised Buffer" <<endl;
gCinderOpenNISkeleton->bInitialized = true;
gCinderOpenNISkeleton->mDepthSurface = Surface8u( texWidth, texHeight, false ); // width, height, alpha?
}
for (nY=0; nY<texHeight; nY++)
{
for (nX=0; nX<texWidth; nX++)
{
nValue = *pDepth;
if (nValue != 0)
{
gCinderOpenNISkeleton->pDepthHist[nValue]++;
nNumberOfPoints++;
}
pDepth++;
}
}
for (nIndex=1; nIndex<MAX_DEPTH; nIndex++)
{
gCinderOpenNISkeleton->pDepthHist[nIndex] += gCinderOpenNISkeleton->pDepthHist[nIndex-1];
}
if (nNumberOfPoints)
{
for (nIndex=1; nIndex<MAX_DEPTH; nIndex++)
{
gCinderOpenNISkeleton->pDepthHist[nIndex] =
(unsigned int)(256 * (1.0f - (gCinderOpenNISkeleton->pDepthHist[nIndex] / nNumberOfPoints)));
}
}
pDepth = gCinderOpenNISkeleton->mDepthMD.Data();
Area area( 0, 0, texWidth, texHeight );
Surface::Iter iter = gCinderOpenNISkeleton->mDepthSurface.getIter( area );
while( iter.line() ) {
while( iter.pixel() ) {
iter.r() = 0;
iter.g() = 0;
iter.b() = 0;
if ( *pLabels != 0) // Buh?
{
nValue = *pDepth;
XnLabel label = *pLabels;
XnUInt32 nColorID = label % nColors;
if (label == 0)
{
nColorID = nColors;
}
if (nValue != 0)
{
nHistValue = gCinderOpenNISkeleton->pDepthHist[nValue];
iter.r() = nHistValue * Colors[nColorID][0];
iter.g() = nHistValue * Colors[nColorID][1];
iter.b() = nHistValue * Colors[nColorID][2];
}
//app::console() << "PLABEL with Colour: " << label % nColors << endl;
}
else {
nValue = *pDepth;
//app::console() << "nValue: " << nValue << endl;
if (nValue != 0)
{
nHistValue = gCinderOpenNISkeleton->pDepthHist[nValue];
//app::console() << "nHistValue: " << nHistValue << endl;
iter.r() = nHistValue;
iter.g() = nHistValue;
iter.b() = nHistValue;
}
}
pDepth++;
pLabels++;
}
}
gl::clear( Color( 0, 0, 0 ) );
gl::draw(gl::Texture(gCinderOpenNISkeleton->mDepthSurface));
}