二次B样条曲线2页.doc

二次B样条曲线（4个顶点）：#include#includemain() float t; int x,y; int n=100,i=0; float x0=0,x1=100,x2=200,x3=300,y0=300,y1=0,y2=300,y3=0; int gdriver=DETECT,gmode; initgraph(&gdriver,&gmode,); printf(Input x0,y0,x1,y1,x2,y2n); /*scanf(%d,%d,%d,%d,%d,%d,&x0,&y0,&x1,&y1,&x2,&y2);*/ cleardevice(); setbkcolor(0);setcolor(10); for(t=0;t=1.0;t+=1.0/n) x=x0*1/2*(t-1)*(t-1)+x1*1/2*(-2*t*t+2*t+1)+x2*1/2*t*t; y=y0*1/2*(t-1)*(t-1)+y1