private List <ICuttableEdge> MakeOcclusionLoop(CirclePrimitive player, CirclePrimitive obstacle, float radius_shift)
{
Vector2 center2center = player.center - obstacle.center;
float cp_param = Mathf.Atan2(center2center.y, center2center.x);
float param_spread = Mathf.Acos(Mathf.Min((player.radius + obstacle.radius) / center2center.magnitude, 1.0f));
CircleEdge circle_edge = new CircleEdge(
new CircleArc
{
center = obstacle.center,
radius = obstacle.radius * (1 + radius_shift),
t_start = cp_param - param_spread,
t_end = cp_param + param_spread
},
false);
var circle_end = circle_edge.Eval(0);
LineEdge edge1 = new LineEdge(
new LineSegment
{
p0 = circle_end.pt,
p1 = circle_end.pt - circle_end.dir * 100
},
false);
circle_end = circle_edge.Eval(1);
LineEdge edge2 = new LineEdge(
new LineSegment
{
p0 = circle_end.pt,
p1 = circle_end.pt + circle_end.dir * 100
},
true);
List <ICuttableEdge> res = new List <ICuttableEdge>();
res.Add(edge1);
for (int i = 0; i < 5; ++i)
{
res.Add(new LineEdge(new LineSegment {
p0 = circle_edge.Eval(1.0f * i / 5).pt, p1 = circle_edge.Eval(1.0f * (i + 1) / 5).pt
}, true));
}
res.Add(edge2);
return(res);
}
private List <ICuttableEdge> MakeMiddleZone(CirclePrimitive player, CirclePrimitive target)
{
// 4 circle edges
CircleArc arc = new CircleArc();
CirclePrimitive primitive = MakeMiddlePrimitive(player, target);
arc.radius = primitive.radius;
arc.center = primitive.center;
arc.t_start = 0;
arc.t_end = Mathf.PI * 2;
var res = new List <ICuttableEdge>();
var circle_edge = new CircleEdge(arc, false);
for (int i = 0; i < 100; ++i)
{
res.Add(new LineEdge(new LineSegment {
p0 = circle_edge.Eval(1.0f * i / 100).pt, p1 = circle_edge.Eval(1.0f * (i + 1) / 100).pt
}, true));
}
return(res);
}
