public override bool Raycast(Ray2 ray, float distance, out RaycastResult result)
{
result = new RaycastResult();
Vec2 delta = ray.origin - transform.position;
// Since length of ray direction is always 1, therefore a = 1
float b = 2 * Vec2.Dot(ray.direction, delta);
float c = delta.SqrMagnitude - radius * radius;
float d = b * b - 4 * c;
if (d < 0)
{
return(false);
}
float t;
if (d < Mathf.Epsilon)
{
t = -b / 2;
}
else
{
d = (float)Math.Sqrt(d);
t = (-b - d) / 2;
}
result.point = ray.origin + ray.direction * t;
result.distance = t;
result.normal = (result.point - transform.position).Normalized;
return(t <= distance);
}
public override bool Raycast(Ray2 ray, float distance, out RaycastResult result)
{
result = new RaycastResult();
float tmin = Ray2.Tmax;
int crossings = 0;
for (int i = 0; i < VertexCount; i++)
{
float t;
int j = (i + 1) % VertexCount;
Vec2 a = transform.LocalToWorldPosition(vertices[i]);
Vec2 b = transform.LocalToWorldPosition(vertices[j]);
if (ray.IntersectSegment(a, b, distance, out t))
{
crossings++;
if (t < tmin && t <= distance)
{
tmin = t;
result.point = ray.origin + ray.direction * tmin;
result.normal = transform.LocalToWorldDirection(normals[i]);
result.distance = tmin;
}
}
}
// Point in polygon test, to make sure that origin isn't inside polygon
return(crossings > 0 && crossings % 2 == 0);
}
bool IBroadphase.Raycast(Ray2 ray, float distance, out RaycastResult result)
{
result = new RaycastResult();
float tmin = Ray2.Tmax;
Queue <Node> q = new Queue <Node>();
if (root != null)
{
q.Enqueue(root);
}
while (q.Count > 0)
{
Node node = q.Dequeue();
if (node.bounds.Raycast(ray, distance))
{
if (node.IsLeaf)
{
RaycastResult tempResult;
if (node.body.shape.Raycast(ray, distance, out tempResult))
{
if (tempResult.distance < tmin)
{
result = tempResult;
tmin = tempResult.distance;
}
}
}
else
{
q.Enqueue(node.child0);
q.Enqueue(node.child1);
}
}
}
return(tmin < Ray2.Tmax);
}
public bool Raycast(Ray2 ray, float distance = Ray2.Tmax)
{
float tminX = (min.x - ray.origin.x) / ray.direction.x;
float tmaxX = (max.x - ray.origin.x) / ray.direction.x;
float tminY = (min.y - ray.origin.y) / ray.direction.y;
float tmaxY = (max.y - ray.origin.y) / ray.direction.y;
float tmin = Math.Max(Math.Min(tminX, tmaxX), Math.Min(tminY, tmaxY));
float tmax = Math.Min(Math.Max(tminX, tmaxX), Math.Max(tminY, tmaxY));
if (tmax < 0)
{
return(false);
}
if (tmax < tmin)
{
return(false);
}
return(true);
}
bool IBroadphase.Raycast(Ray2 ray, float distance, out RaycastResult result)
{
result = new RaycastResult();
return(false);
}
public bool Raycast(Ray2 ray, float distance, out RaycastResult result)
{
return(broadphase.Raycast(ray, distance, out result));
}
public bool Raycast(Ray2 ray, out RaycastResult result)
{
return(Raycast(ray, Ray2.Tmax, out result));
}