void contourToConvexHull(ofPolyline &src, ofPolyline &dst) {
dst.clear();
vector<hPoint> P(src.size());
for(int i = 0; i < src.size(); i++) {
P[i].x = src[i].x;
P[i].y = src[i].y;
}
int n = src.size(), k = 0;
vector<hPoint> H(2*n);
// Sort points lexicographically
sort(P.begin(), P.end());
// Build lower hull
for (int i = 0; i < n; i++) {
while (k >= 2 && cross(H[k-2], H[k-1], P[i]) <= 0) k--;
H[k++] = P[i];
}
// Build upper hull
for (int i = n-2, t = k+1; i >= 0; i--) {
while (k >= t && cross(H[k-2], H[k-1], P[i]) <= 0) k--;
H[k++] = P[i];
}
H.resize(k);
for(int i = 0; i < H.size(); i++) {
dst.addVertex(H[i].x + 500, H[i].y);
}
}
void ofxPolylineLoad(ofPolyline & poly, string xmlPath) {
ofXml xml;
bool bLoaded = xml.load(xmlPath);
if(bLoaded == false) {
return;
}
xml.setTo("poly");
bool bClosed = ofToInt(xml.getAttribute("closed"));
poly.clear();
int numOfPoints = xml.getNumChildren();
for(int i=0; i<numOfPoints; i++) {
xml.setToChild(i);
float x = ofToFloat(xml.getAttribute("x"));
float y = ofToFloat(xml.getAttribute("y"));
poly.addVertex(x, y);
}
if(bClosed == true) {
poly.close();
}
}
void phdGimbal2d::getKeyPoints(ofPolyline & _keys) {
_keys.clear();
_keys.addVertex( 1.00, 0.0);
_keys.addVertex( 0.75, 0.0);
_keys.addVertex( 0.00, 0.0);
_keys.addVertex( 0.00,-1.0);
getTransformedPolyline(_keys, _keys, getOTSMatrix());
}
void update()
{
// Update our little offset thingy.
offset += 0.01;
if (offset > 1)
{
offset = 0;
}
// Update our camera.
grabber.update();
// If the camera has a new frame to offer us ...
if (grabber.isFrameNew())
{
// Make a copy of our grabber pixels in the colorImage.
colorImage.setFromPixels(grabber.getPixelsRef());
// When we assign a color image to a grayscale image, it is converted automatically.
grayscaleImage = colorImage;
// If we set learnBackground to true using the keyboard, we'll take a snapshot of
// the background and use it to create a clean foreground image.
if (learnBackground == true)
{
// We assign the grayscaleImage to the grayscaleBackgroundImage.
grayscaleBackgroundImage = grayscaleImage;
// Now we set learnBakground so we won't set a background unless
// explicitly directed to with a keyboard command.
learnBackground = false;
}
// Create a difference image by comparing the background and the current grayscale images.
grayscaleAbsoluteDifference.absDiff(grayscaleBackgroundImage, grayscaleImage);
// Assign grayscaleAbsoluteDifference to the grayscaleBinary image.
grayscaleBinary = grayscaleAbsoluteDifference;
// Then threshold the grayscale image to create a binary image.
grayscaleBinary.threshold(threshold, invert);
// Find contours (blobs) that are between the size of 20 pixels and
// 1 / 3 * (width * height) of the camera. Also find holes.
contourFinder.findContours(grayscaleBinary, 100, (width * height) / 3.0, 10, true);
// Get the biggest blob and use it to draw.
if (contourFinder.nBlobs > 0)
{
holePositions.addVertex(contourFinder.blobs[0].boundingRect.getCenter());
}
else
{
holePositions.clear();
}
}
}
//--------------------------------------------------------------
void testApp::newPath() {
path.clear();
// A path is a series of connected points
// A more sophisticated path might be a curve
path.addVertex(0, ofGetHeight()/2);
path.addVertex(ofRandom(0, ofGetWidth()/2), ofRandom(0, ofGetHeight()));
path.addVertex(ofRandom(ofGetWidth()/2, ofGetWidth()), ofRandom(0, ofGetHeight()));
path.addVertex(ofGetWidth(), ofGetHeight()/2);
}
void testApp::update(){
ofSetWindowTitle(ofToString(ofGetFrameRate()));
mesh.clear();
for (int i = 0; i < balls.size(); i++) {
balls[i].update();
float z = 0;
ofPoint sp = ofPoint(balls[i].getPos().x, balls[i].getPos().y, z);
mesh.curveTo(sp*1.0);
}
}
void testApp::interpolatePolyLine(ofPolyline& a, ofPolyline& b, ofPolyline& out, float delta){
if(a.getVertices().size() != b.getVertices().size()){
ofLogError("Polylines did not match in size");
return;
}
out.clear();
for(int i = 0; i < a.getVertices().size(); i++){
out.addVertex( a.getVertices()[i].getInterpolated(b.getVertices()[i], delta) );
}
}
void WaveformForBuffer(Float32 * begin, size_t length, float w, float h, ofPolyline &outLine, unsigned rate) {
const size_t size = length / rate;
if(size == 0) {
outLine.clear();
return;
}
if(outLine.size() != size) {
outLine.resize(size);
}
float * v = (float *)&outLine[0];
float zero = 0;
float half = h / 2.;
vDSP_vsmsa(begin, rate, &half, &half, v + 1, 3, size); // multiply and add "y"s
vDSP_vgen(&zero, &w, v, 3, size); // generate "x"s
}
//--------------------------------------------------------------
void ofApp::keyPressed(int key){
switch(key) {
case 'R': bRotate ^= true; if(!bRotate) rotAngle = 0; break;
case 'r': poly.clear(); break;
case 'c': poly.curveTo(mouseX, mouseY); break;
case 'a': poly.arc(mouseX, mouseY, 50, 50, 0, 180); break;
case 'o': poly.setClosed(!poly.isClosed()); break;
case 'F': poly.simplify(10); break;
case 'M': poly = poly.getSmoothed(5); break;
case 'S': poly = poly.getResampledBySpacing(30); break;
case 'C': poly = poly.getResampledByCount(50); break;
case 'l': poly.setClosed(!poly.isClosed());
case 'i': poly.insertVertex(ofPoint(mouseX, mouseY, 0), nearestIndex); break;
}
}
// ----------------------------------------------------------
void WaveformForBuffer(const ofxAudioUnitTap::MonoSamples &buffer, float width, float height, ofPolyline &outLine, unsigned sampleRate)
// ----------------------------------------------------------
{
outLine.clear();
const float xStep = width / (buffer.size() / sampleRate);
float x = 0;
for (int i = 0; i < buffer.size(); i += sampleRate, x += xStep)
{
#if TARGET_OS_IPHONE
SInt16 s = SInt16(buffer[i] >> 9);
float y = ofMap(s, -32768, 32767, height, 0, true);
#else
float y = ofMap(buffer[i], -1, 1, height, 0, true);
#endif
outLine.addVertex(ofPoint(x, y));
}
}
//--------------------------------------------------------------
void Path3D::parsePts(string filename, ofPolyline &polyline){
ofFile file = ofFile(ofToDataPath(filename));
polyline.clear();
if(!file.exists()){
ofLogError("The file " + filename + " is missing");
}
ofBuffer buffer(file);
//Read file
for (ofBuffer::Line it = buffer.getLines().begin(); it != buffer.getLines().end(); it++) {
string line = *it;
float scalar = 10;
ofVec3f offset;
if (filename == "path_XZ.txt"){
offset = ofVec3f(0, 0, 0);
scalar = 3;
}
else if (filename == "path_YZ.txt"){
offset = ofVec3f(0, 0, 0);
scalar = 3;
}
else{
offset = ofVec3f(0, 0, .25);
scalar = 3;
}
ofStringReplace(line, "{", "");
ofStringReplace(line, "}", "");
cout<<line<<endl;
vector<string> coords = ofSplitString(line, ", "); // get x y z coordinates
ofVec3f p = ofVec3f(ofToFloat(coords[0])*scalar,ofToFloat(coords[1])*scalar,ofToFloat(coords[2])*scalar);
p += offset;
polyline.addVertex(p);
}
}
//--------------------------------------------------------------
void testApp::mousePressed(int x, int y, int button){
temp.clear();
}