152 lines
3.2 KiB
C++
152 lines
3.2 KiB
C++
#include<cstdio>
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#include<cstdlib>
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#include<cmath>
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struct Point
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{
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double x,y;
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Point(double x=0,double y=0):x(x),y(y){}
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};
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typedef Point Vector;
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inline Point read_point()
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{
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Point A;
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scanf("%lf%lf",&A.x,&A.y);
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return A;
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}
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inline Vector operator+(const Vector &A,const Vector &B)
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{ return Vector(A.x+B.x,A.y+B.y); }
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inline Vector operator-(const Point &a,const Point &b)
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{ return Vector(a.x-b.x,a.y-b.y); }
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inline Vector operator*(const Vector &A,double p)
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{ return Vector(A.x*p,A.y*p); }
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inline Vector operator/(const Vector &A,double p)
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{ return Vector(A.x/p,A.y/p); }
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inline bool operator<(const Point &a,const Point &b)
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{ return a.x<b.x||(a.x==b.x&&a.y<b.y); }
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const double ops=1e-10;
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inline int dcmp(double x)
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{ return (x>0?x:-x)<ops?0:(x>0?1:-1); }
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inline bool operator==(const Point &a,const Point &b)
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{ return dcmp(a.x-b.x)==0&&dcmp(a.y-b.y)==0; }
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inline double Dot(const Vector &A,const Vector &B)
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{ return A.x*B.x+A.y*B.y; }
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inline double Length(const Vector &A)
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{ return sqrt(Dot(A,A)); }
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inline double Angle(const Vector &A,const Vector &B)
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{ return acos(Dot(A,B)/Length(A)/Length(B)); }
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inline double Cross(const Vector &A,const Vector &B)
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{ return A.x*B.y-A.y*B.x; }
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inline double Area2(const Point &a,const Point &b,const Point &c)
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{ return Cross(b-a,c-a); }
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inline Vector Rotate(const Vector &A,double rad)
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{
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double csr=cos(rad),sir=sin(rad);
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return Vector(A.x*csr-A.y*sir,A.x*sir+A.y*csr);
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}
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inline Vector Normal(const Vector &A)
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{
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double L=Length(A);
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return Vector(-A.y/L,A.x/L);
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}
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inline Point GetLineIntersection
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(const Point &P,const Vector &v,const Point &Q,const Vector &w)
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{
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Vector u=P-Q;
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double t=Cross(w,u)/Cross(v,w);
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return P+v*t;
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}
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inline double DistanceToLine
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(const Point &P,const Point &A,const Point &B)
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{
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Vector v1=B-A,v2=P-A;
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return fabs(Cross(v1,v2))/Length(v1);
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}
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inline double DistanceToSegment
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(const Point &P,const Point &A,const Point &B)
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{
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if(A==B) return Length(P-A);
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Vector v1=B-A,v2=P-A,v3=P-B;
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if(dcmp(Dot(v1,v2))<0) return Length(v2);
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else if(dcmp(Dot(v1,v3))>0) return Length(v3);
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else return fabs(Cross(v1,v2))/Length(v1);
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}
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inline Point GetLineProjection
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(const Point &P,const Point &A,const Point &B)
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{
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Vector v=B-A;
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return A+v*(Dot(v,P-A)/Dot(v,v));
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}
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inline bool SegmentProperIntersection
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(const Point &a1,const Point &a2,const Point &b1,const Point &b2)
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{
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double c1=Cross(a2-a1,b1-a1),c2=Cross(a2-a1,b2-a1),
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c3=Cross(b2-b1,a1-b1),c4=Cross(b2-b1,a2-b1);
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return dcmp(c1)*dcmp(c2)<0&&dcmp(c3)*dcmp(c4)<0;
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}
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inline bool OnSegment
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(const Point &p,const Point &a1,const Point &a2)
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{ return dcmp(Cross(a1-p,a2-p))==0&&dcmp(Dot(a1-p,a2-p))<0; }
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inline double PolygonArea(Point* p,int n)
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{
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double area=0;
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for(int i=1;i<n-1;i++)
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area+=Cross(p[i]-p[0],p[i+1]-p[0]);
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return area/2;
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}
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Point getD(Point A,Point B,Point C)
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{
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Vector v1=C-B;
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double a1=Angle(A-B,v1);
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v1=Rotate(v1,a1/3);
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Vector v2=B-C;
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double a2=Angle(A-C,v2);
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v2=Rotate(v2,-a2/3);
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return GetLineIntersection(B,v1,C,v2);
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}
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int T;
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Point A,B,C,D,E,F;
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int main()
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{
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#ifdef local
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freopen("pro.in","r",stdin);
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#endif
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scanf("%d",&T);
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while(T--)
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{
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A=read_point();
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B=read_point();
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C=read_point();
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D=getD(A,B,C);
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E=getD(B,C,A);
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F=getD(C,A,B);
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printf("%.6lf %.6lf %.6lf %.6lf %.6lf %.6lf\n"
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,D.x,D.y,E.x,E.y,F.x,F.y);
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}
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return 0;
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}
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