private void Update()
{
// Mouse left button released
if (Input.GetMouseButtonUp(0))
{
Ray ray = _raycastCamera.ScreenPointToRay(Input.mousePosition);
if (Physics.Raycast(ray, out RaycastHit hit))
{
_lineRenderer.startColor = Color.white;
_lineRenderer.endColor = _lineRenderer.startColor;
if (_polygonOutline.Count > 1)
{
_lineRenderer.startColor = Color.green;
_lineRenderer.endColor = _lineRenderer.startColor;
}
_gateEdgeOverlap = false;
if (_lineRenderer.positionCount > 2)
{
if (EdgeOverlapsOutline(_lineRenderer.GetPosition(_lineRenderer.positionCount - 1), hit.point))
{
return;
}
if (EdgeOverlapsOutline(hit.point, _lineRenderer.GetPosition(0)))
{
_lineRenderer.startColor = Color.red;
_lineRenderer.endColor = _lineRenderer.startColor;
_gateEdgeOverlap = true;
}
}
GameObject go = Instantiate(_pointPrefab);
go.transform.position = hit.point + _positionOffset;
_polygonOutline.Add(go);
_lineRenderer.positionCount = _polygonOutline.Count;
_lineRenderer.SetPositions(_polygonOutline.Select(gam => gam.transform.position).ToArray());
}
else
{
Debug.LogError("Mouse position raycast failed, this should never happen!");
}
}
else if (Input.GetKeyUp(KeyCode.Return) && !_gateEdgeOverlap)
{
if (_polygonOutline.Count < 3)
{
Debug.LogWarning("Cannot triangulate only one edge.");
return;
}
Mesh m = new Mesh();
Vector3[] edge = _polygonOutline.Select(gam => gam.transform.position).ToArray();
m.vertices = edge;
Triangulation.CapMesh(m, Enumerable.Range(0, edge.Length).ToList(), 0, _convexSupport);
MeshObject outputGO = Instantiate(_outputGameObjectPrefab.gameObject).GetComponent <MeshObject>();
outputGO.SetMesh(m);
outputGO.SetPolygonCollider(edge.Select(v3 => new Vector2(v3.x, v3.y)).ToArray());
_polygonOutline.ForEach(go => Destroy(go));
_polygonOutline.Clear();
_lineRenderer.positionCount = _polygonOutline.Count;
_lineRenderer.startColor = Color.white;
_lineRenderer.endColor = _lineRenderer.startColor;
}
}