/// <summary>
///
/// </summary>
/// <typeparam name="M"></typeparam>
/// <typeparam name="V"></typeparam>
/// <typeparam name="E"></typeparam>
/// <typeparam name="F"></typeparam>
/// <param name="factory"></param>
/// <param name="polylines"></param>
/// <param name="setPosition"></param>
/// <param name="tolerance"></param>
/// <returns></returns>
public static M CreateFromPolylines <M, V, E, F>(this HeMeshFactoryBase <M, V, E, F> factory, IEnumerable <Polyline> polylines, Action <V, Vec3d> setPosition, double tolerance = 1.0e-8)
where M : HeMeshBase <V, E, F>
where V : HeVertex <V, E, F>
where E : Halfedge <V, E, F>
where F : HeFace <V, E, F>
{
List <Vec3d> points = new List <Vec3d>();
List <int> sizes = new List <int>();
// get all polyline points
foreach (Polyline p in polylines)
{
int n = p.Count - 1;
if (!p.IsClosed || n < 3)
{
continue; // skip open or invalid loops
}
// collect all points in the loop
for (int i = 0; i < n; i++)
{
points.Add(p[i].ToVec3d());
}
sizes.Add(n);
}
var vertPos = points.RemoveCoincident(out int[] indexMap, tolerance);
return(factory.CreateFromFaceVertexData(vertPos, indexMap.Segment(sizes), setPosition));
}
/// <summary>
///
/// </summary>
/// <typeparam name="M"></typeparam>
/// <typeparam name="V"></typeparam>
/// <typeparam name="E"></typeparam>
/// <typeparam name="F"></typeparam>
/// <param name="factory"></param>
/// <param name="polylines"></param>
/// <param name="tolerance"></param>
/// <returns></returns>
public static M CreateFromPolylines <M, V, E, F>(this HeMeshFactoryBase <M, V, E, F> factory, IEnumerable <Polyline> polylines, double tolerance = 1.0e-8)
where M : HeMeshBase <V, E, F>
where V : HeVertex <V, E, F>, IVertex3d
where E : Halfedge <V, E, F>
where F : HeFace <V, E, F>
{
return(factory.CreateFromPolylines(polylines, (v, p) => v.Position = p, tolerance));
}
/// <summary>
///
/// </summary>
/// <typeparam name="M"></typeparam>
/// <typeparam name="V"></typeparam>
/// <typeparam name="E"></typeparam>
/// <typeparam name="F"></typeparam>
/// <param name="factory"></param>
/// <param name="mesh"></param>
/// <param name="setPosition"></param>
/// <param name="setNormal"></param>
/// <param name="setTexture"></param>
/// <param name="setColor"></param>
/// <returns></returns>
public static M CreateFromMesh <M, V, E, F>(this HeMeshFactoryBase <M, V, E, F> factory, Mesh mesh, Action <V, Point3f> setPosition, Action <V, Vector3f> setNormal, Action <V, Point2f> setTexture, Action <V, Color> setColor)
where M : HeMeshBase <V, E, F>
where V : HeVertex <V, E, F>
where E : Halfedge <V, E, F>
where F : HeFace <V, E, F>
{
var verts = mesh.Vertices;
var faces = mesh.Faces;
var norms = mesh.Normals;
var texCoords = mesh.TextureCoordinates;
var colors = mesh.VertexColors;
var result = factory.Create(verts.Count, verts.Count << 3, faces.Count);
bool hasNorms = (norms.Count == verts.Count);
bool hasTexCoords = (texCoords.Count == verts.Count);
bool hasColors = (colors.Count == verts.Count);
// add vertices
for (int i = 0; i < verts.Count; i++)
{
var v = result.AddVertex();
setPosition(v, verts[i]);
if (hasNorms)
{
setNormal(v, norms[i]);
}
if (hasTexCoords)
{
setTexture(v, texCoords[i]);
}
if (hasColors)
{
setColor(v, colors[i]);
}
}
// add faces
for (int i = 0; i < faces.Count; i++)
{
MeshFace f = faces[i];
if (f.IsQuad)
{
result.AddFace(f.A, f.B, f.C, f.D);
}
else
{
result.AddFace(f.A, f.B, f.C);
}
}
return(result);
}
/// <summary>
///
/// </summary>
/// <typeparam name="M"></typeparam>
/// <typeparam name="V"></typeparam>
/// <typeparam name="E"></typeparam>
/// <typeparam name="F"></typeparam>
/// <param name="factory"></param>
/// <param name="mesh"></param>
/// <returns></returns>
public static M CreateFromMesh <M, V, E, F>(this HeMeshFactoryBase <M, V, E, F> factory, Mesh mesh)
where M : HeMeshBase <V, E, F>
where V : HeVertex <V, E, F>, IVertex3d
where E : Halfedge <V, E, F>
where F : HeFace <V, E, F>
{
return(factory.CreateFromMesh(mesh,
(v, p) => v.Position = p.ToVec3d(),
(v, n) => v.Normal = n.ToVec3d(),
(v, t) => v.Texture = t.ToVec2d(),
delegate { }));
}
