From 6655926e01396139f4b81323d8adcc734bc4284e Mon Sep 17 00:00:00 2001
From: Chris Xiong <chirs241097@gmail.com>
Date: Sun, 1 Nov 2015 23:33:50 +0800
Subject: Add smPath source files. Sync with the latest BLR3.

---
 extensions/smpath.cpp | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)
 create mode 100644 extensions/smpath.cpp

(limited to 'extensions')

diff --git a/extensions/smpath.cpp b/extensions/smpath.cpp
new file mode 100644
index 0000000..9d73b4a
--- /dev/null
+++ b/extensions/smpath.cpp
@@ -0,0 +1,27 @@
+#include <cmath>
+#include "smpath.hpp"
+smPathSegment::smPathSegment(smvec2d _a,smvec2d _b){a=_a,b=_b;}
+smvec2d smPathSegment::getPointOnPath(double rt)
+{return a+rt*(b-a);}
+double smPathSegment::getPathLength()
+{return (a-b).l();}
+smPathCircular::smPathCircular(smvec2d _ctr,double _a,double _b,double _r)
+{ctr=_ctr,a=_a,b=_b,r=_r;}
+smvec2d smPathCircular::getPointOnPath(double rt)
+{return smvec2d(ctr.x+r*cos(a+rt*(b-a)),ctr.y+r*sin(a+rt*(b-a)));}
+double smPathCircular::getPathLength()
+{return fabs(a-b)*r;}
+int smPathCollection::pushPath(smPathBase *p){paths[cpaths++]=p;return cpaths-1;}
+smPathBase* smPathCollection::getPath(int pid){return paths[pid];}
+smvec2d smPathCollection::getPointOnCollection(double rt)
+{
+	double l=0.,tl=0.;
+	int i;
+	for(i=0;i<cpaths;++i)l+=paths[i]->getPathLength();
+	for(i=0;i<cpaths;++i)
+	{
+		if(tl+paths[i]->getPathLength()>=l*rt)break;
+		tl+=paths[i]->getPathLength();
+	}
+	return paths[i]->getPointOnPath(rt-tl/l);
+}
-- 
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