void AddCircleCollider2Ds(Transform parent)
{
// find all valid colliders, add them to projection
var colliders = FindObjectsOfType <CircleCollider2D>();
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.Cylinder);
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);
// position in 3D with Y aligned so feet are at y=0
go.transform.position = new Vector3(worldPos.x, NavMesh2D.ProjectedObjectY, worldPos.y);
// scale depending on scale * collider size (circle=radius/box=size/...)
go.transform.localScale = NavMeshUtils2D.ScaleFromCircleCollider2D(collider);
// rotation
go.transform.rotation = Quaternion.Euler(NavMeshUtils2D.RotationTo3D(collider.transform.eulerAngles));
MakeUnwalkable(go);
}
}
// monobehaviour ///////////////////////////////////////////////////////////
void Awake()
{
// create projection
var go = GameObject.CreatePrimitive(PrimitiveType.Cylinder);
go.name = "NAVIGATION2D_OBSTACLE";
go.transform.position = NavMeshUtils2D.ProjectTo3D(transform.position);
go.transform.rotation = Quaternion.Euler(NavMeshUtils2D.RotationTo3D(transform.eulerAngles));
obst = go.AddComponent <NavMeshObstacle>();
// disable mesh and collider (no collider for now)
Destroy(obst.GetComponent <Collider>());
Destroy(obst.GetComponent <MeshRenderer>());
}
void Update()
{
// copy properties to projection all the time
// (in case they are modified after creating it)
obst.carving = carve;
obst.center = NavMeshUtils2D.ProjectTo3D(center);
obst.size = new Vector3(size.x, 1, size.y);
// scale and rotate to match scaled/rotated sprites center properly
obst.transform.localScale = new Vector3(transform.localScale.x, 1, transform.localScale.y);
obst.transform.rotation = Quaternion.Euler(NavMeshUtils2D.RotationTo3D(transform.eulerAngles));
// project position to 3d
obst.transform.position = NavMeshUtils2D.ProjectTo3D(transform.position);
}
void AddPolygonCollider2Ds(Transform parent)
{
// find all valid colliders, add them to projection
var colliders = GameObject.FindObjectsOfType <PolygonCollider2D>();
var filtered = colliders.Where(co => IsValidCollider(co)).ToList();
foreach (var collider in filtered)
{
for (int i = 0; i < collider.pathCount; i++)
{
// 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.ScaleFromPolygonCollider2D(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>());
// Use the triangulator to get indices for creating triangles
int[] indices = Triangulation.Triangulate(collider.GetPath(i).ToList()).ToArray();
// convert vector2 points to vector3 vertices
var vertices = collider.GetPath(i).Select(p => new Vector3(p.x, 0, p.y)).ToList();
// create mesh
var mesh = new Mesh();
mesh.vertices = vertices.ToArray();
mesh.triangles = indices;
//mesh.RecalculateNormals();
mesh.RecalculateBounds();
// assign it to the mesh filter
go.GetComponent <MeshFilter>().sharedMesh = mesh;
MakeUnwalkable(go);
}
}
}
void AddTilemapCollider2Ds(Transform parent)
{
// find all grids
Grid[] grids = GameObject.FindObjectsOfType <Grid>();
foreach (Grid grid in grids)
{
// find tilemaps (we only care about those that have colliders)
var tilemaps = grid.GetComponentsInChildren <Tilemap>().Where(
tm => tm.GetComponent <TilemapCollider2D>()
).ToList();
foreach (Tilemap tilemap in tilemaps)
{
// go through each cell
BoundsInt bounds = tilemap.cellBounds;
for (int y = bounds.position.y; y < bounds.size.y; ++y)
{
for (int x = bounds.position.x; x < bounds.size.x; ++x)
{
// find out if it has a collider
Vector3Int cellPosition = new Vector3Int(x, y, 0);
if (tilemap.GetColliderType(cellPosition) != Tile.ColliderType.None)
{
// convert to world space
Vector3 worldPosition = tilemap.GetCellCenterWorld(cellPosition);
// 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
go.transform.position = new Vector3(worldPosition.x, 0, worldPosition.y);
// scale depending on scale * collider size (circle=radius/box=size/...)
go.transform.localScale = NavMeshUtils2D.ScaleTo3D(tilemap.transform.localScale);
// rotation
go.transform.rotation = Quaternion.Euler(NavMeshUtils2D.RotationTo3D(tilemap.transform.eulerAngles));
MakeUnwalkable(go);
}
}
}
}
}
}
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);
}
}
