From 50877e0deaf349f6950de8342045c96d5bce257b Mon Sep 17 00:00:00 2001
From: Tim Redfern <tim@getdrop.com>
Date: Thu, 18 Jan 2018 14:58:40 +0000
Subject: segmenting demo with syphon

---
 drawing/src/lineSegmenter.cpp | 66 ++++++++++++++++++++++++++++++++++++++-----
 1 file changed, 59 insertions(+), 7 deletions(-)

(limited to 'drawing/src/lineSegmenter.cpp')

diff --git a/drawing/src/lineSegmenter.cpp b/drawing/src/lineSegmenter.cpp
index f848272..47a9d62 100644
--- a/drawing/src/lineSegmenter.cpp
+++ b/drawing/src/lineSegmenter.cpp
@@ -1,15 +1,67 @@
 #include "lineSegmenter.h"
 
-const vector <ofPolyline> & lineSegmenter::getSegments(int num,float coverage, float phase) const{
-	segments.clear();
+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) 
+
+*/
 
-	float spacing=1.0f/num;
+
+	segments.clear();
 
 	for (int i=0;i<num;i++){
-		float endIndex=line.getIndexAtPercent(phase+(i*spacing));
+		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);	
 	}
 
-	float endlength=line.getIndex
-
 	return segments;
-}
\ No newline at end of file
+}
+
+void lineSegmenter::draw(){
+	line.draw();
+	return;
+}
+
+/*
+
+
+
+
+*/
\ No newline at end of file
-- 
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