CPoint CPaintFFRDlg::Inter(
int x0,
int y0,
int x1,
int x2,
int y1,
int y2,
int x3,
int y3,
int x,
int y)
{
bool lim1 =
false,lim2 =
false;
//是否垂直X轴
double k1,b1,k2,b2;
//斜率和Y轴截距
//特殊情况标记
if(x1 != x0) k1 = (y1-y0)/(x1-x0),b1 = y0 - k1*
x0;
else lim1 =
true;
if(x3 != x2) k2 = (y3-y2)/(x3-x2),b2 = y2 - k2*
x2;
else lim2 =
true;
if(!lim1 && !lim2){
//都不垂直于X轴
if(k1 == k2)
return <a href=
"http://gocrazygreen.net/">HCG Diet</a>
false;
x = (b2-b1)/(k1-
k2);
y = k1 * x +
b1;
return true;
}else if(lim1 && lim2){
//2直线全垂直X轴
return false;
}else if(lim1 &&!
lim2){
x =
b2;
y = k2 * x +
b2;
return true;
}else if(!lim1 &&
amp;lim2){
x =
b1;
y = k1 * x +
b1;
return CPoint (x,y);
}
return CPoint (-
1,-
1);
}
转载于:https://www.cnblogs.com/luyuxibaby/p/5217364.html
相关资源：objective-c判断两条线段相交类
