资源简介
亲测可用 算法可以较为准确的拟合球三维点云数据的球心和半径
代码片段和文件信息
#include
#include
#include
using namespace std;
#define ABS(x) (x)>0?(x):-(x)
#define SWAP(ab) {temp=(a);(a)=(b);(b)=temp;}
void solve(double **adouble *bdouble *xint n)
{
int ijkik;
double miktemp;
for(k=0;k {
mik=-1;
for(i=k;i if(ABS(a[i][k])>mik)
{
mik=ABS(a[i][k]);
ik=i;
}
for(j=k;j SWAP(a[ik][j]a[k][j]);
SWAP(b[k]b[ik]);
b[k]/=a[k][k];
for(i=n-1;i>=k;i--)
a[k][i]/=a[k][k];
for(i=k+1;i {
b[i]-=a[i][k]*b[k];
for(j=n-1;j>=k;j--)
a[i][j]-=a[i][k]*a[k][j];
}
}
for(i=n-1;i>=0;i--)
{
x[i]=b[i];
for(j=i+1;j x[i]-=a[i][j]*x[j];
}
}
void linear(double **xdouble *ydouble *betaint nint p)// p=4
{
double **a*b;
int ijk;
a=new double*[p];
for(i=0;i a[i]=new double[p];
for(i=0;i for(j=0;j {
a[i][j]=0;
for(k=0;k a[i][j]+=x[k][i]*x[k][j];
}
b=new double[p];
for(i=0;i {
b[i]=0;
for(j=0;j b[i]+=x[j][i]*y[j];
}
solve(abbetap);
for(i=0;i delete a[i];
delete ab;
}
void make(int xint yint zint rint n)
{
float arg=0.5;
float err=2;
float abefg;
ofstream file(“log.txt“);
file< while(n--)
{
a=(3.141/arg)*float(rand())/RAND_MAX;
b=(3.141/arg)*float(rand())/RAND_MAX;
e=x+r*sin(a)*cos(b)*(1+((float(rand())-(RAND_MAX>>1))/RAND_MAX)/err);
f=y+r*sin(a)*sin(b)*(1+((float(rand())-(RAND_MAX>>1))/RAND_MAX)/err);
g=z+r*cos(a)*(1+((float(rand())-(RAND_MAX>>1))/RAND_MAX)/err);
file< }
}
void main()
{
//make(00010010000);
ifstream file(“Ball_num_3.txt“);
while(!file.eof())
{
int inp=4;
double x0y0z0r;
double **x*ybeta[4];
file>>n;
x=new double*[n];
y=new double[n];
for(i=0;i {
x[i]=new double[4];
file>>x[i][0]>>x[i][1]>>x[i][2];
x[i][3]=1;
y[i]=-x[i][0]*x[i][0]-x[i][1]*x[i][1]-x[i][2]*x[i][2];
}
linear(xybetanp);// x是数据 y是半径 beta存圆心和半径数据 p=4.
x0=-beta[0]/2;
y0=-beta[1]/2;
z0=-beta[2]/2;
r=sqrt(x0*x0+y0*y0+z0*z0-beta[3]);
printf(“%f\t%f\t%f\t%f\t\n“x0y0z0r);
delete[]y;
while(n--)delete[]x[n];
delete[]x;}
file.close();
}
属性 大小 日期 时间 名称
----------- --------- ---------- ----- ----
目录 0 2016-07-30 21:29 ball_center_1\
目录 0 2016-08-01 09:10 ball_center_1\ball_center\
目录 0 2016-08-01 09:10 ball_center_1\ball_center\ball_center\
文件 1707008 2016-08-01 09:04 ball_center_1\ball_center\ball_center.ncb
文件 899 2016-07-30 21:29 ball_center_1\ball_center\ball_center.sln
文件 10240 2016-07-31 23:44 ball_center_1\ball_center\ball_center.suo
文件 3666 2016-07-30 21:44 ball_center_1\ball_center\ball_center\ball_center.vcproj
文件 1411 2016-07-31 23:44 ball_center_1\ball_center\ball_center\ball_center.vcproj.minm-PC.minm.user
文件 11462 2016-07-31 14:33 ball_center_1\ball_center\ball_center\Ball_num_1.txt
文件 26462 2016-07-31 14:34 ball_center_1\ball_center\ball_center\Ball_num_2.txt
文件 26723 2016-07-31 14:34 ball_center_1\ball_center\ball_center\Ball_num_3.txt
文件 16173 2016-07-31 14:34 ball_center_1\ball_center\ball_center\Ball_num_4.txt
文件 15880 2016-07-31 14:34 ball_center_1\ball_center\ball_center\Ball_num_5.txt
文件 15534 2016-07-31 10:37 ball_center_1\ball_center\ball_center\Ball_num_6.txt
文件 14113 2016-07-31 10:38 ball_center_1\ball_center\ball_center\Ball_num_7.txt
文件 16499 2016-07-31 10:39 ball_center_1\ball_center\ball_center\Ball_num_8.txt
文件 14073 2016-07-31 10:40 ball_center_1\ball_center\ball_center\Ball_num_9.txt
目录 0 2016-08-01 09:10 ball_center_1\ball_center\ball_center\Debug\
文件 621 2016-07-30 22:03 ball_center_1\ball_center\ball_center\Debug\ball_center.exe.intermediate.manifest
文件 8166 2016-07-30 22:03 ball_center_1\ball_center\ball_center\Debug\BuildLog.htm
文件 55026 2016-07-30 22:03 ball_center_1\ball_center\ball_center\Debug\main.obj
文件 67 2016-07-30 22:03 ball_center_1\ball_center\ball_center\Debug\mt.dep
文件 183296 2016-07-30 22:03 ball_center_1\ball_center\ball_center\Debug\vc90.idb
文件 225280 2016-07-30 22:03 ball_center_1\ball_center\ball_center\Debug\vc90.pdb
文件 2735 2016-07-31 21:13 ball_center_1\ball_center\ball_center\main.cpp
目录 0 2016-08-01 09:10 ball_center_1\ball_center\Debug\
文件 43520 2016-07-30 22:03 ball_center_1\ball_center\Debug\ball_center.exe
文件 419896 2016-07-30 22:03 ball_center_1\ball_center\Debug\ball_center.ilk
文件 551936 2016-07-30 22:03 ball_center_1\ball_center\Debug\ball_center.pdb
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