c++ strchr函数_strchr函数返回_模拟实现strchr函数(35)

if(!dots_onplane(u.a,u.b,v.a,v.b))

return 0;

if(!dots_inline(u.a,u.b,v.a)||!dots_inline(u.a,u.b,v.b))

return !same_side(u.a,u.b,v)&&!same_side(v.a,v.b,u);

returndot_online_in(u.a,v)||dot_online_in(u.b,v)||dot_online_in(v.a,u)||dot_online_in(v.b,u);

}

int intersect_in(point3 u1,point3 u2,point3v1,point3 v2){

if(!dots_onplane(u1,u2,v1,v2))

return 0;

if(!dots_inline(u1,u2,v1)||!dots_inline(u1,u2,v2))

return!same_side(u1,u2,v1,v2)&&!same_side(v1,v2,u1,u2);

returndot_online_in(u1,v1,v2)||dot_online_in(u2,v1,v2)||dot_online_in(v1,u1,u2)||dot_online_in(v2,u1,u2);

}

int intersect_ex(line3 u,line3 v){

returndots_onplane(u.a,u.b,v.a,v.b)&&opposite_side(u.a,u.b,v)&&opposite_side(v.a,v.b,u);

}

int intersect_ex(point3 u1,point3 u2,point3v1,point3 v2){

returndots_onplane(u1,u2,v1,v2)&&opposite_side(u1,u2,v1,v2)&&opposite_side(v1,v2,u1,u2);

}

int intersect_in(line3 l,plane3 s){

return!same_side(l.a,l.b,s)&&!same_side(s.a,s.b,l.a,l.b,s.c)&&

!same_side(s.b,s.c,l.a,l.b,s.a)&&!same_side(s.c,s.a,l.a,l.b,s.b);

}

int intersect_in(point3 l1,point3 l2,point3s1,point3 s2,point3 s3){

return!same_side(l1,l2,s1,s2,s3)&&!same_side(s1,s2,l1,l2,s3)&&

!same_side(s2,s3,l1,l2,s1)&&!same_side(s3,s1,l1,l2,s2);

}

int intersect_ex(line3 l,plane3 s){

returnopposite_side(l.a,l.b,s)&&opposite_side(s.a,s.b,l.a,l.b,s.c)&&

opposite_side(s.b,s.c,l.a,l.b,s.a)&&opposite_side(s.c,s.a,l.a,l.b,s.b);

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