public virtual bool Extrude(int group_id = -1)
{
// duplicate loop vertices
int NV = Loop.Vertices.Length;
NewLoop = new EdgeLoop(Mesh);
NewLoop.Vertices = new int[NV];
for (int i = 0; i < NV; ++i)
{
int vid = Loop.Vertices[i];
NewLoop.Vertices[i] = Mesh.AppendVertex(Mesh, vid);
}
// move to offset positions
for (int i = 0; i < NV; ++i)
{
Vector3D v = Mesh.GetVertex(Loop.Vertices[i]);
Vector3F n = Mesh.GetVertexNormal(Loop.Vertices[i]);
Vector3D new_v = PositionF(v, n, i);
Mesh.SetVertex(NewLoop.Vertices[i], new_v);
}
// stitch interior
MeshEditor edit = new MeshEditor(Mesh);
NewTriangles = edit.StitchLoop(Loop.Vertices, NewLoop.Vertices, group_id);
return(true);
}
public virtual bool Fill(int group_id = -1)
{
if (Loop.Vertices.Length < 3)
{
return(false);
}
// this just needs one triangle
if (Loop.Vertices.Length == 3)
{
Index3i tri = new Index3i(Loop.Vertices[0], Loop.Vertices[2], Loop.Vertices[1]);
int new_tid = Mesh.AppendTriangle(tri, group_id);
if (new_tid == NGonsCore.geometry3Sharp.mesh.DMesh3.InvalidID)
{
return(false);
}
NewTriangles = new int[1] {
new_tid
};
NewVertex = NGonsCore.geometry3Sharp.mesh.DMesh3.InvalidID;
return(true);
}
// [TODO] 4-case? could check nbr normals to figure out best internal edge...
// compute centroid
Vector3D c = Vector3D.Zero;
for (int i = 0; i < Loop.Vertices.Length; ++i)
{
c += Mesh.GetVertex(Loop.Vertices[i]);
}
c *= 1.0 / Loop.Vertices.Length;
// add centroid vtx
NewVertex = Mesh.AppendVertex(c);
// stitch triangles
MeshEditor editor = new MeshEditor(Mesh);
try {
NewTriangles = editor.AddTriangleFan_OrderedVertexLoop(NewVertex, Loop.Vertices, group_id);
} catch {
NewTriangles = null;
}
// if fill failed, back out vertex-add
if (NewTriangles == null)
{
Mesh.RemoveVertex(NewVertex);
NewVertex = NGonsCore.geometry3Sharp.mesh.DMesh3.InvalidID;
}
return(true);
}
public void Generate()
{
Append_mesh();
AxisAlignedBox3i bounds = Voxels.GridBounds;
bounds.Max -= Vector3i.One;
int[] vertices = new int[4];
foreach (Vector3i nz in Voxels.NonZeros())
{
Check_counts_or_append(6, 2);
Box3d cube = Box3d.UnitZeroCentered;
cube.Center = (Vector3D)nz;
for (int fi = 0; fi < 6; ++fi)
{
// checks dependent on neighbours
Index3i nbr = nz + gIndices.GridOffsets6[fi];
if (bounds.Contains(nbr))
{
if (SkipInteriorFaces && Voxels.Get(nbr))
{
continue;
}
}
else if (CapAtBoundary == false)
{
continue;
}
int ni = gIndices.BoxFaceNormals[fi];
Vector3F n = (Vector3F)(Math.Sign(ni) * cube.Axis(Math.Abs(ni) - 1));
NewVertexInfo vi = new NewVertexInfo(Vector3D.Zero, n);
if (ColorSourceF != null)
{
vi.c = ColorSourceF(nz);
vi.bHaveC = true;
}
for (int j = 0; j < 4; ++j)
{
vi.v = cube.Corner(gIndices.BoxFaces[fi, j]);
vertices[j] = cur_mesh.AppendVertex(vi);
}
Index3i t0 = new Index3i(vertices[0], vertices[1], vertices[2], Clockwise);
Index3i t1 = new Index3i(vertices[0], vertices[2], vertices[3], Clockwise);
cur_mesh.AppendTriangle(t0);
cur_mesh.AppendTriangle(t1);
}
}
}
public void MakeMesh(NGonsCore.geometry3Sharp.mesh.DMesh3 m)
{
int nV = vertices.Count;
for (int i = 0; i < nV; ++i)
{
NewVertexInfo ni = new NewVertexInfo()
{
v = vertices[i]
};
if (WantNormals)
{
ni.bHaveN = true;
ni.n = normals[i];
}
if (WantUVs)
{
ni.bHaveUV = true;
ni.uv = uv[i];
}
int vID = m.AppendVertex(ni);
Util.gDevAssert(vID == i);
}
int nT = triangles.Count;
if (WantGroups && groups != null && groups.Length == nT)
{
for (int i = 0; i < nT; ++i)
{
m.AppendTriangle(triangles[i], groups[i]);
}
}
else
{
for (int i = 0; i < nT; ++i)
{
m.AppendTriangle(triangles[i]);
}
}
}