void AddEdgeCollider2Ds(Transform parent)
{
// find all valid colliders, add them to projection
var colliders = GameObject.FindObjectsOfType <EdgeCollider2D>();
var filtered = colliders.Where(co => IsValidCollider(co)).ToList();
foreach (var collider in filtered)
{
// note: creating a primitive is necessary in order for it to bake properly
var go = GameObject.CreatePrimitive(PrimitiveType.Cube);
go.isStatic = true;
go.transform.parent = parent;
// position via offset and transformpoint
var localPos = new Vector3(collider.offset.x, collider.offset.y, 0);
var worldPos = collider.transform.TransformPoint(localPos);
go.transform.position = new Vector3(worldPos.x, 0, worldPos.y);
// scale depending on scale * collider size (circle=radius/box=size/...)
go.transform.localScale = NavMeshUtils2D.ScaleFromEdgeCollider2D(collider);
// rotation
go.transform.rotation = Quaternion.Euler(NavMeshUtils2D.RotationTo3D(collider.transform.eulerAngles));
// remove box collider. note that baking uses the meshfilter, so
// the collider doesn't really matter anyway.
DestroyImmediate(go.GetComponent <BoxCollider>());
// create mesh from edgecollider2D by stepping through each point
// and creating a triangle with point, point-1 and point-1 with y=1
List <Vector3> vertices = new List <Vector3>();
List <int> indices = new List <int>();
// start at 2nd point so we can use the first one in our triangle,
for (int i = 1; i < collider.points.Length; ++i)
{
Vector2 a2D = collider.points[i - 1];
Vector2 b2D = collider.points[i];
// convert to 3D
// point A
// point B
// point C := A with y+1
Vector3 a3D = new Vector3(a2D.x, 0, a2D.y);
Vector3 b3D = new Vector3(b2D.x, 0, b2D.y);
Vector3 c3D = new Vector3(a2D.x, 1, a2D.y);
// add 3 vertices
vertices.Add(a3D);
vertices.Add(b3D);
vertices.Add(c3D);
// add last 3 vertices as indices
indices.Add(vertices.Count - 1);
indices.Add(vertices.Count - 2);
indices.Add(vertices.Count - 3);
}
// create mesh
var mesh = new Mesh();
mesh.vertices = vertices.ToArray();
mesh.triangles = indices.ToArray();
//mesh.RecalculateNormals();
mesh.RecalculateBounds();
// assign it to the mesh filter
go.GetComponent <MeshFilter>().sharedMesh = mesh;
MakeUnwalkable(go);
}
}
