求C++函數，生成B樣條曲線子線段端點的坐標

TPoint p0,p1,p2,p3,p11,p22,pp0,pp1,pp2,pt11,pt22;

int i;

for(i = 0;i < cpfx-1;i++)

{

pt11 = pPfx[i];

pt22 = pPfx[i+1]

pp0 = pts[ptn-1];

pp1 = pt11;

pp2.x = (pt11.x + pt22.x)/2;

pp2.y = (pt11.y + pt22.y)/2;

p0 = pp0;

p1.x = pp0.x/3 + 2 * pp1.x/3;

p1.y = pp0.y/3 + 2 * pp1.y/3;

p2.x = 2 * pp1.x/3 + pp2.x/3;

p2.y = 2 * pp1.y/3 + pp2.y/3;

p3 = pp2;

//register float t;

for(float t = 0.0f;t <= 1.0f;t += 0.5f)

{

float x = (1-t)*(1-t)*(1-t)*p0.x+

3*t*(1-t)*(1-t)*p1.x+ 3*t*t

*(1-t)*p2.x + t*t*t*p3.x;

float y = (1-t)*(1-t)*(1-t)*p0.y

+ 3*t*(1-t)*(1-t)*p1.y+3

*t*t*(1-t)*p2.y + t*t*t*p3.y;

pts[ptn].x = x;

pts[ptn].y = y;

ptn++;

}

}

根據具體的使用環境調整，這是TTF字庫顯示用的。