/// <summary>
/// Search for closest point on model-mesh and corresponding normal vector
/// when given an arbitrary point. A fe-model needs to exist before this
/// function gives correct results.
/// </summary>
/// <param name="test_point">point for which closest point on the mesh
/// of a model is desired</param>
/// <param name="pointOnModel">point on model mesh which is closest to
/// given point</param>
/// <param name="normalOnModel"> normal vector at model point closest to
/// given point</param>
///
/// <returns>true if a closest model mesh-point exists</returns>
public bool ClosestPoint(
Point3 test_point, out Point3 pointOnModel, out Vector3 normalOnModel)
{
var res = false;
#if !UnitTest
var min_dist = double.MaxValue;
double dist;
#endif
pointOnModel = new Point3();
normalOnModel = new Vector3();
var tp = test_point.Convert();
foreach (var mesh in meshes_)
{
#if UnitTest
throw new NotImplementedException();
#else
var mpoint = mesh.ClosestMeshPoint(
tp, double.MaxValue);
dist = mpoint.Point.DistanceTo(tp);
if (dist < min_dist)
{
res = true;
pointOnModel = mpoint.Point.Convert();
// calculate face normal
var face = mesh.Faces[mpoint.FaceIndex];
normalOnModel = FaceNormal(mesh, face);
min_dist = dist;
}
#endif
}
return(res);
}
public int AddVertex(Point3 vertex)
{
var res = mesh.Vertices.Count;
mesh.Vertices.Add(vertex.Convert());
return(res);
}
/// <summary>
/// /// Gets the point on the mesh that is closest to a given test point. Similar to the
/// ClosestPoint function except this returns a MeshPoint class which includes
/// extra information beyond just the location of the closest point.
/// </summary>
/// <param name="testPoint"></param>
/// <param name="maximumDistance"></param>
/// <returns></returns>
public Point3 ClosestMeshPoint(Point3 testPoint, double maximumDistance)
{
#if UnitTest
throw new NotImplementedException();
#else
return((mesh.ClosestMeshPoint(testPoint.Convert(), maximumDistance)).Point.Convert());
#endif
}
/// <summary>
/// Determine whether there exists a closest point to any mesh whose distance
/// to the test_point is smaller or equal than limit_dist.
///
/// </summary>
/// <param name="testPoint">Test point.</param>
/// <param name="limit_dist"></param>
/// <returns>True if such a point exists, false otherwise.</returns>
public bool HasClosestPoint(
Point3 testPoint, double limit_dist)
{
#if !UnitTest
var min_dist = double.MaxValue;
double dist;
#endif
var tp = testPoint.Convert();
foreach (var mesh in meshes_)
{
#if UnitTest
throw new NotImplementedException();
#else
var mpoint = mesh.ClosestMeshPoint(
tp, double.MaxValue);
dist = mpoint.Point.DistanceTo(tp);
if (dist <= limit_dist && dist < min_dist)
{
return(true);
}
#endif
}
return(false);
}
private void LoadObj()
{
ImportObj(path);
IntPtr sizePtr = GetSizes();
Size sizes = (Size)Marshal.PtrToStructure(new IntPtr(sizePtr.ToInt32()), typeof(Size));
IntPtr vertPtr = GetVertices();
Point3[] vertsT = GetElements <Point3>(vertPtr, sizes.vSize);
Vector3[] verts = Point3.Convert(vertsT);
IntPtr normPtr = GetNormals();
Point3[] normsT = GetElements <Point3>(normPtr, sizes.nSize);
Vector3[] norms = Point3.Convert(normsT);
IntPtr uvPtr = GetUVs();
Point2[] uvsT = GetElements <Point2>(uvPtr, sizes.uSize);
Vector2[] uvs = Point2.Convert(uvsT);
IntPtr triPtr = GetTris();
int[] tris = GetElements <int>(triPtr, sizes.tSize);
Mesh mesh = new Mesh();
mesh.vertices = verts;
mesh.uv = uvs;
mesh.normals = norms;
mesh.triangles = tris;
mesh.RecalculateBounds();
meshFilter.mesh = mesh;
}
public bool IsNear(Point3 p)
{
Point3d p3d = p.Convert();
foreach (Point3d to_point in to_points_)
{
if (to_point.DistanceTo(p3d) < limit_dist_)
{
return(true);
}
}
foreach (Curve to_curve in to_curves_)
{
#if UnitTest
throw new NotImplementedException();
#else
double t;
if (to_curve.ClosestPoint(p3d, out t, limit_dist_))
{
return(true);
}
#endif
}
foreach (var to_line in to_lines_)
{
if (to_line.DistanceTo(p3d, true) <= limit_dist_)
{
return(true);
}
}
foreach (Plane to_plane in to_planes_)
{
if (Math.Abs(to_plane.DistanceTo(p3d)) <= limit_dist_)
{
return(true);
}
}
foreach (Brep to_brep in to_breps_)
{
#if UnitTest
throw new NotImplementedException();
#else
Point3d closest_point;
ComponentIndex ci;
double s, t;
Vector3d normal;
if (to_brep.ClosestPoint(p3d, out closest_point, out ci, out s, out t,
limit_dist_, out normal))
{
return(true);
}
#endif
}
foreach (Mesh to_mesh in to_meshes_)
{
#if UnitTest
throw new NotImplementedException();
#else
if (to_mesh.ClosestPoint(p3d).DistanceTo(p3d) <= limit_dist_)
{
return(true);
}
#endif
}
return(false);
}