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#include "lineSegmenter.h"
const vector <ofPolyline> & lineSegmenter::getSegments(int num,float coverage, float phase){
//num - number of segments
//coverage - amount that each segment fills it's slot from 0-1
//phase - from 0-1
//if the path is closed, we can make a segment that crosses the end/beginning
//however we want to be able to deal with open paths
/*
segments 0...n - 1
phase 0...1
phase 0
segment 0 is (0 -> coverage) / n
segment n - 1 is ((0 -> coverage) + (n-1)) /n
phase 1: has to be the loop target, it has to look identical
segment 0 is (1 -> coverage) / n
segment n - 1 is (1 - > coverage) + (n-1)
*/
segments.clear();
for (int i=0;i<num;i++){
float startIndex=line.getIndexAtPercent((phase+i)/num); //always <1
float endPoint=(phase+i+coverage)/num; //can be >1
float endIndex=line.getIndexAtPercent(endPoint>1.0f?endPoint-1.0f:endPoint);
ofPolyline segment;
segment.addVertex(line.getPointAtIndexInterpolated(startIndex));
for (int j=(int)ceil(startIndex);j<(endPoint>1?line.size():(int)ceil(endIndex));j++){
segment.addVertex(line[j]);
}
if (endPoint>1){
segments.push_back(segment);
segment.clear();
for (int j=0;j<(int)ceil(endIndex);j++){
segment.addVertex(line[j]);
}
segment.addVertex(line.getPointAtIndexInterpolated(endIndex));
}
else {
segment.addVertex(line.getPointAtIndexInterpolated(endIndex));
}
segments.push_back(segment);
}
return segments;
}
void lineSegmenter::draw(){
line.draw();
return;
}
int lineSegmenter::size(){
return line.size();
}
const vector <colourPolyline> & colourLineSegmenter::getSegments(int num,float coverage, float phase){
segments.clear();
for (int i=0;i<num;i++){
float startIndex=line.getIndexAtPercent((phase+i)/num); //always <1
float endPoint=(phase+i+coverage)/num; //can be >1
float endIndex=line.getIndexAtPercent(endPoint>1.0f?endPoint-1.0f:endPoint);
colourPolyline segment;
segment.addVertex(line.getPointAtIndexInterpolated(startIndex),line.getColourAtIndexInterpolated(startIndex));
for (int j=(int)ceil(startIndex);j<(endPoint>1?line.size():(int)ceil(endIndex));j++){
segment.addVertex(line[j],line.getColourAt(j));
}
if (endPoint>1){
segments.push_back(segment);
segment.clear();
for (int j=0;j<(int)ceil(endIndex);j++){
segment.addVertex(line[j],line.getColourAt(j));
}
segment.addVertex(line.getPointAtIndexInterpolated(endIndex),line.getColourAtIndexInterpolated(endIndex));
}
else {
segment.addVertex(line.getPointAtIndexInterpolated(endIndex),line.getColourAtIndexInterpolated(endIndex));
}
segments.push_back(segment);
}
return segments;
}
void colourLineSegmenter::draw(){
line.draw();
return;
}
int colourLineSegmenter::size(){
return line.size();
}
/*
*/
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