Position VisiblePosition::previousVisiblePosition(const Position &pos)
{
if (pos.isNull() || atStart(pos))
return Position();
Position test = deepEquivalent(pos);
Position downstreamTest = test.downstream(StayInBlock);
bool acceptAnyVisiblePosition = !isCandidate(test);
Position current = test;
while (!atStart(current)) {
current = previousPosition(current);
if (isCandidate(current) && (acceptAnyVisiblePosition || (downstreamTest != current.downstream(StayInBlock)))) {
return current;
}
}
return Position();
}
void ofApp::drawContFinder(){
ofSetBackgroundAuto(bShowLabels);
ofxCv::RectTracker& tracker = contFinder.getTracker();
if(bShowLabels) {
ofSetColor(255);
if(bBackgroundLearned){
grayDiffOfImage.draw(0,0);
} else {
grayImage.draw(0, 0);
}
contFinder.draw();
for(int i = 0; i < contFinder.size(); i++) {
ofPoint center = ofxCv::toOf(contFinder.getCenter(i));
ofPushMatrix();
ofTranslate(center.x, center.y);
int label = contFinder.getLabel(i);
string msg = ofToString(label) + ":" + ofToString(tracker.getAge(label));
ofDrawBitmapString(msg, 0, 0);
ofVec2f velocity = ofxCv::toOf(contFinder.getVelocity(i));
ofScale(5, 5);
ofLine(0, 0, velocity.x, velocity.y);
ofPopMatrix();
}
} else {
for(int i = 0; i < contFinder.size(); i++) {
unsigned int label = contFinder.getLabel(i);
// only draw a line if this is not a new label
if(tracker.existsPrevious(label)) {
// use the label to pick a random color
ofSeedRandom(label << 24);
ofSetColor(ofColor::fromHsb(ofRandom(255), 255, 255));
// get the tracked object (cv::Rect) at current and previous position
const cv::Rect& previous = tracker.getPrevious(label);
const cv::Rect& current = tracker.getCurrent(label);
// get the centers of the rectangles
ofVec2f previousPosition(previous.x + previous.width / 2, previous.y + previous.height / 2);
ofVec2f currentPosition(current.x + current.width / 2, current.y + current.height / 2);
ofLine(previousPosition, currentPosition);
}
}
}
// this chunk of code visualizes the creation and destruction of labels
const vector<unsigned int>& currentLabels = tracker.getCurrentLabels();
const vector<unsigned int>& previousLabels = tracker.getPreviousLabels();
const vector<unsigned int>& newLabels = tracker.getNewLabels();
const vector<unsigned int>& deadLabels = tracker.getDeadLabels();
ofSetColor(ofxCv::cyanPrint);
for(int i = 0; i < currentLabels.size(); i++) {
int j = currentLabels[i];
ofLine(j, 0, j, 4);
}
ofSetColor(ofxCv::magentaPrint);
for(int i = 0; i < previousLabels.size(); i++) {
int j = previousLabels[i];
ofLine(j, 4, j, 8);
}
ofSetColor(ofxCv::yellowPrint);
for(int i = 0; i < newLabels.size(); i++) {
int j = newLabels[i];
ofLine(j, 8, j, 12);
}
ofSetColor(ofColor::white);
for(int i = 0; i < deadLabels.size(); i++) {
int j = deadLabels[i];
ofLine(j, 12, j, 16);
}
}
void nebulaContourFinder::draw(int x, int y, int w, int h){
if(!enabled || blurred.size() == cv::Size(0,0)) return;
ofxCv::RectTracker& tracker = finder.getTracker();
ofPushMatrix();
ofScale(w/blurred.cols, h/blurred.rows);
ofTranslate(x,y);
if(showLabels) {
finder.draw();
for(int i = 0; i < finder.size(); i++) {
ofPoint center = ofxCv::toOf(finder.getCenter(i));
ofPushMatrix();
ofTranslate(center.x, center.y);
int label = finder.getLabel(i);
string msg = ofToString(label) + ":" + ofToString(tracker.getAge(label));
ofDrawBitmapString(msg, 0, 0);
ofDrawCircle(0,0,2);
ofVec2f pt = ofxCv::toOf(finder.getCentroid(i));
pt.x /= blurred.cols;
pt.y /= blurred.rows;
msg = ofToString(pt);
ofDrawBitmapString(msg, 0, 12);
ofVec2f velocity = ofxCv::toOf(finder.getVelocity(i));
ofScale(5, 5);
ofDrawLine(0, 0, velocity.x, velocity.y);
ofPopMatrix();
}
} else {
for(int i = 0; i < finder.size(); i++) {
unsigned int label = finder.getLabel(i);
// only draw a line if this is not a new label
if(tracker.existsPrevious(label)) {
// use the label to pick a random color
ofSeedRandom(label << 24);
ofSetColor(ofColor::fromHsb(ofRandom(255), 255, 255));
// get the tracked object (cv::Rect) at current and previous position
const cv::Rect& previous = tracker.getPrevious(label);
const cv::Rect& current = tracker.getCurrent(label);
// get the centers of the rectangles
ofVec2f previousPosition(previous.x + previous.width / 2, previous.y + previous.height / 2);
ofVec2f currentPosition(current.x + current.width / 2, current.y + current.height / 2);
ofDrawLine(previousPosition, currentPosition);
}
}
}
ofTranslate(x,y);
// this chunk of code visualizes the creation and destruction of labels
const vector<unsigned int>& currentLabels = tracker.getCurrentLabels();
const vector<unsigned int>& previousLabels = tracker.getPreviousLabels();
const vector<unsigned int>& newLabels = tracker.getNewLabels();
const vector<unsigned int>& deadLabels = tracker.getDeadLabels();
ofSetColor(ofxCv::cyanPrint);
for(int i = 0; i < currentLabels.size(); i++) {
int j = currentLabels[i];
ofDrawLine(j, 0, j, 4);
}
ofSetColor(ofxCv::magentaPrint);
for(int i = 0; i < previousLabels.size(); i++) {
int j = previousLabels[i];
ofDrawLine(j, 4, j, 8);
}
ofSetColor(ofxCv::yellowPrint);
for(int i = 0; i < newLabels.size(); i++) {
int j = newLabels[i];
ofDrawLine(j, 8, j, 12);
}
ofSetColor(ofColor::white);
for(int i = 0; i < deadLabels.size(); i++) {
int j = deadLabels[i];
ofDrawLine(j, 12, j, 16);
}
ofPopMatrix();
ofPopStyle();
}