//------------------------------------------------------------
ofxPolyline ofxPolyline::getResampledAndVerticesBySpacing(float spacing) {
// Get resampled points while keeping vertices
ofxPolyline polyline;
polyline.setStrokeLinecap(getStrokeLinecap());
polyline.setStrokeLinejoin(getStrokeLinejoin());
float totalLength = getPerimeter();
int currentIndex = 1;
ofVec2f prevPoint = ofVec2f(FLT_MAX, FLT_MAX);
for(float f=0; f<totalLength; f += spacing) {
float index = getIndexAtLength(f);
while (index > currentIndex) {
ofVec2f newPoint = (*this)[currentIndex];
// Don't add if this point is very close to the prev point
if (!newPoint.match(prevPoint)) {
polyline.lineTo(newPoint);
prevPoint = newPoint;
}
currentIndex++;
}
ofVec2f newPoint = getPointAtLength(f);
// Don't add if this point is very close to the prev point
if (!newPoint.match(prevPoint)) {
polyline.lineTo(newPoint);
prevPoint = newPoint;
}
}
if(!isClosed()) {
if(polyline.size() > 0) {
polyline[polyline.size()-1] = (*this)[size()-1];
}
polyline.setClosed(false);
} else {
polyline.setClosed(true);
}
return polyline;
}
//--------------------------------------------------
ofPoint ofPolyline::getPointAtLength(float f) const {
if(points.size() < 2) return ofPoint();
updateCache();
return getPointAtIndexInterpolated(getIndexAtLength(f));
}
//--------------------------------------------------
float ofPolyline::getIndexAtPercent(float f) const {
return getIndexAtLength(f * getPerimeter());
}
