如何用有限个点拟合出光滑的曲线
/* 二次抛物线法绘制曲线函数 */
void paowuxian(int *x,int *y,int n,unsigned int k)
{
unsigned int i,j;
float t1,t2,t3,t,a,b,c,d,tx,ty;
*x=*(x+1);*(y)=*(y+1);
*(x+n+1)=*(x+n);*(y+n+1)=*(y+n);
t=0.5/k;
setcolor(10);
moveto(*(x+1),*(y+1));
for(i=0;in-1;i++)
{
for(j=1;jk;j++)
{
t1=j*t;
t2=t1*t1;
t3=t2*t1;
a=4*t2-t1-4*t3;
b=1-10*t2+12*t3;
c=t1+8*t2-12*t3;
d=4*t3-2*t2;
tx=a*(*(x+i))...[ 查看全文 ]
