////////////////////////////////////////////////////////////////////////
/// Semantic Events
void ModelVertex_Click()
{
if (IsSplitting)
{
if (PreviousSplittedVertex != null)
{
Model.AddEdge(PreviousSplittedVertex,
Model.Vertices[OpObject.Index], true);
}
PreviousSplittedVertex = Model.Vertices[OpObject.Index];
Model.UpdateAll();
return;
}
Model.Vertices[OpObject.Index].Selected = true;
Model.UpdateAll();
}
private void glc_MouseUp(Object sender, MouseEventArgs e)
{
// Was to drag but didn't, treated as clicked
if (!DragInfo.WasDragging)
{
// This behavious is usually cancelling actions
if (DragInfo.State == DragState.RightButton)
{
IsSplitting = false;
PreviousSplittedVertex = null;
}
else if (DragInfo.State == DragState.LeftButton)
{
OpObject = ObjectMapFuzzy(e.X, e.Y, 3, (int)ObjectType.ModelVertex);
TryKeepSelection();
if (OpObject.Type == ObjectType.ModelVertex)
{
ModelVertex_Click();
}
else if (OpObject.Type == ObjectType.ModelEdge)
{
ModelEdge_Click();
}
else if (OpObject.Type == ObjectType.ModelFacet)
{
ModelFacet_Click();
}
}
}
else if (DragInfo.State == DragState.None)
{
TryKeepSelection();
}
if (DragInfo.State == DragState.BoxSelect)
{
BoxSelect_Finished();
this.BoxSelectingType = ObjectType.None;
}
DragInfo.Reset();
}
public void RemoveVertex(MeshVertex v)
{
int i = v.Index;
if (vertices[i] != v)
{
return;
}
if (i != vertices.Count - 1)
{
vertices[i] = vertices.Last();
vertices[i].SetGraphInfo(this, i);
}
vertices.RemoveAt(vertices.Count - 1);
v.Selected = false;
v.ClearAdjacency();
}
public override void AddMeshGraphUpon(
ref MeshGraph mg, bool selected = true)
{
MeshVertex[,] vs = new MeshVertex[VSubdivision - 1, USubdivision];
for (int v = 1; v < VSubdivision; v++)
{
for (int u = 0; u < USubdivision; u++)
{
double a = Math.PI * 2 * u / USubdivision;
double b = -Math.PI * v / VSubdivision + Math.PI / 2;
vs[v - 1, u] = mg.AddVertex(
(float)(Radius * Math.Cos(a) * Math.Cos(b)),
(float)(Radius * Math.Sin(b)),
-(float)(Radius * Math.Sin(a) * Math.Cos(b)));
}
}
for (int v = 0; v < VSubdivision - 2; v++)
{
for (int u = 0; u < USubdivision; u++)
{
mg.AddFacet(vs[v, u], vs[v + 1, u],
vs[v + 1, (u + 1) % USubdivision], vs[v, (u + 1) % USubdivision]);
}
}
MeshVertex top = mg.AddVertex(0, Radius, 0),
btm = mg.AddVertex(0, -Radius, 0);
for (int u = 0; u < USubdivision; u++)
{
mg.AddFacet(top, vs[0, u], vs[0, (u + 1) % USubdivision]);
mg.AddFacet(vs[VSubdivision - 2, (u + 1) % USubdivision],
vs[VSubdivision - 2, u], btm);
}
foreach (MeshVertex v in vs)
{
SelectAdjacency(v);
}
SelectAdjacency(top);
SelectAdjacency(btm);
}
public RotationTransformerRenderer() :
base(ObjectType.RotationTransformer)
{
MeshVertex[] vs = new MeshVertex[32];
for (int i = 0; i < 32; i++)
{
double a = 2.0 * Math.PI * i / 32.0;
vs[i] = axis.AddVertex(1.5f * (float)Math.Cos(a), 0, 1.5f * (float)Math.Sin(a));
if (i > 0)
{
axis.AddEdge(vs[i - 1], vs[i]);
}
}
axis.AddEdge(vs[31], vs[0]);
axis.EdgeData.UpdateData();
axisTfs = new Matrix4[3];
axisTfs[0] = Matrix4.CreateRotationZ((float)Math.PI / 2); // x
axisTfs[1] = Matrix4.Identity; // y
axisTfs[2] = Matrix4.CreateRotationX((float)Math.PI / 2); // z
}
public GridRenderer()
{
SetSource(vertex_shader_source, "", fragment_shader_source);
grid = new MeshGraph();
for (int i = -50; i < 50; i++)
{
MeshVertex v1 = grid.AddVertex(i, 0, -50);
MeshVertex v2 = grid.AddVertex(i, 0, 50);
grid.AddEdge(v1, v2);
}
for (int i = -50; i < 50; i++)
{
MeshVertex v1 = grid.AddVertex(-50, 0, i);
MeshVertex v2 = grid.AddVertex(50, 0, i);
grid.AddEdge(v1, v2);
}
grid.EdgeData.UpdateData();
}
public override void AddMeshGraphUpon(
ref MeshGraph mg, bool selected = true)
{
MeshVertex[,] vs = new MeshVertex[USubdivision + 1, VSubdivision + 1];
for (int i = 0; i <= VSubdivision; i++)
{
for (int j = 0; j <= USubdivision; j++)
{
vs[i, j] = mg.AddVertex(Size * j / USubdivision - Size / 2,
0, -Size * i / VSubdivision - Size / 2);
}
}
for (int i = 0; i < VSubdivision; i++)
{
for (int j = 0; j < USubdivision; j++)
{
mg.AddFacet(vs[i, j], vs[i, j + 1], vs[i + 1, j + 1], vs[i + 1, j]);
}
}
}
public ScalingTransformerRenderer() :
base(ObjectType.ScalingTransformer)
{
new BoxMeshFactory(0.1f, 0.1f, 0.1f)
.AddMeshGraphUpon(ref axis, false);
foreach (MeshVertex v in axis.Vertices)
{
v.Position = v.Position + new Vector3(0, 0, 3);
}
MeshVertex vorg = axis.AddVertex(0, 0, 0);
MeshVertex vhead = axis.AddVertex(0, 0, 3);
axis.AddEdge(vorg, vhead);
axis.EdgeData.UpdateData();
axis.FacetData.UpdateData();
axisTfs = new Matrix4[3];
axisTfs[0] = Matrix4.CreateRotationY((float)Math.PI / 2);
axisTfs[1] = Matrix4.CreateRotationX(-(float)Math.PI / 2);
axisTfs[2] = Matrix4.Identity;
Scaling = new Vector3(1, 1, 1);
}
public void f_Selection_Select_Neighbours()
{
Stack <MeshVertex> vstack = new Stack <MeshVertex>(ParentWindow.Model.SelectedVertices);
ParentWindow.Model.DeselectAll();
while (vstack.Count > 0)
{
MeshVertex v = vstack.Pop();
if (v.Selected)
{
continue;
}
v.Selected = true;
foreach (MeshEdge e in v.Edges)
{
e.Selected = true;
if (e.F1 != null)
{
e.F1.Selected = true;
}
if (e.F2 != null)
{
e.F2.Selected = true;
}
}
foreach (MeshVertex adj in v.AdjacencyVertices)
{
vstack.Push(adj);
}
}
ParentWindow.Model.UpdateAll();
}
public override void AddMeshGraphUpon(
ref MeshGraph mg, bool selected = true)
{
MeshVertex[] topf = new MeshVertex[Subdivision];
MeshVertex[] btmf = new MeshVertex[Subdivision];
for (int i = 0; i < Subdivision; i++)
{
double a = Math.PI * 2 * i / Subdivision;
topf[i] = mg.AddVertex(Radius * (float)Math.Cos(a),
Height / 2, -Radius * (float)Math.Sin(a));
btmf[i] = mg.AddVertex(Radius * (float)Math.Cos(a),
-Height / 2, -Radius * (float)Math.Sin(a));
}
mg.AddFacet(topf);
mg.AddFacet(btmf.Reverse().ToArray());
for (int i = 0; i < Subdivision; i++)
{
mg.AddFacet(topf[i], btmf[i],
btmf[(i + 1) % Subdivision], topf[(i + 1) % Subdivision]);
}
}
public void CreateTriangle()
{
MeshVertex v1 = new MeshVertex(1, 0, 1);
MeshVertex v2 = new MeshVertex(2, 1, 0);
MeshVertex v3 = new MeshVertex(1, 3, 1);
MeshGraph mg = new MeshGraph();
mg.AddVertex(v1);
mg.AddVertex(v2);
mg.AddVertex(v3);
MeshEdge e1 = mg.AddEdge(v1, v2);
MeshEdge e2 = mg.AddEdge(v3, v2);
MeshFacet f = mg.AddFacet(v1, v2, v3);
CollectionAssert.Contains(mg.Vertices, v1);
CollectionAssert.Contains(mg.Vertices, v2);
CollectionAssert.Contains(mg.Vertices, v3);
Assert.AreEqual(v1.EdgeConnecting(v2), v2.EdgeConnecting(v1), "", e1);
Assert.AreEqual(v3.EdgeConnecting(v2), v2.EdgeConnecting(v3), "", e2);
CollectionAssert.Contains(mg.Edges, v1.EdgeConnecting(v2));
CollectionAssert.Contains(mg.Edges, v2.EdgeConnecting(v3));
CollectionAssert.Contains(mg.Edges, v3.EdgeConnecting(v1));
CollectionAssert.Contains(e1.AdjacencyFacets, f);
CollectionAssert.Contains(e1.Endpoints, v1);
CollectionAssert.Contains(f.Vertices, v1);
CollectionAssert.Contains(f.Vertices, v2);
CollectionAssert.Contains(f.Vertices, v3);
CollectionAssert.Contains(f.Edges, v1.EdgeConnecting(v2));
CollectionAssert.Contains(f.Edges, v2.EdgeConnecting(v3));
CollectionAssert.Contains(f.Edges, v3.EdgeConnecting(v1));
{ // Remove the facet
MeshGraph rm = mg.Clone();
MeshFacet rmf = rm.Eqv(f);
rm.RemoveFacet(rmf);
CollectionAssert.DoesNotContain(rm.Facets, rmf);
CollectionAssert.DoesNotContain(
rm.Eqv(e1).AdjacencyFacets, rmf);
CollectionAssert.DoesNotContain(
rm.Eqv(e2).AdjacencyFacets, rmf);
}
{ // Remove an edge
MeshGraph rm = mg.Clone();
MeshEdge rme = rm.Eqv(e1);
MeshFacet rmf = rm.Eqv(f);
rm.RemoveEdge(rme);
CollectionAssert.DoesNotContain(rm.Edges, rme);
CollectionAssert.DoesNotContain(rm.Facets, rmf);
CollectionAssert.DoesNotContain(
rme.AdjacencyFacets, rmf);
CollectionAssert.DoesNotContain(
rm.Eqv(e2).AdjacencyFacets, rmf);
}
{ // Remove an vertex
MeshGraph rm = mg.Clone();
MeshVertex rmv = rm.Eqv(v2);
MeshEdge rme1 = rm.Eqv(v2.EdgeConnecting(rm.Eqv(v1)));
MeshEdge rme2 = rm.Eqv(v2.EdgeConnecting(rm.Eqv(v3)));
MeshFacet rmf = rm.Eqv(f);
rm.RemoveVertex(rmv);
CollectionAssert.DoesNotContain(rm.Vertices, rmv);
CollectionAssert.DoesNotContain(rm.Edges, rme1);
CollectionAssert.DoesNotContain(rm.Edges, rme2);
CollectionAssert.DoesNotContain(rm.Facets, rmf);
Assert.AreEqual(rmv.Edges.Count, 0);
foreach (var v in rm.Vertices)
{
Assert.AreEqual(v.Edges.Count, 1);
}
}
}
public void f_Edit_Join()
{
// find outer edges and duplicated(inner) edges
Dictionary <MeshEdge, bool> edtable = new Dictionary <MeshEdge, bool>();
HashSet <MeshEdge> dup_edges = new HashSet <MeshEdge>();
foreach (MeshFacet f in ParentWindow.Model.SelectedFacets)
{
foreach (MeshEdge e in f.Edges)
{
if (dup_edges.Contains(e))
{
continue;
}
else if (edtable.ContainsKey(e))
{
edtable.Remove(e);
dup_edges.Add(e);
continue;
}
edtable.Add(e, e.F1 == f ? true : false);
}
}
List <MeshVertex> vs = new List <MeshVertex>();
vs.Add(edtable.First().Value ? edtable.First().Key.V1 : edtable.First().Key.V2);
MeshVertex cur_v = edtable.First().Value ? edtable.First().Key.V2 : edtable.First().Key.V1;
while (cur_v != vs[0])
{
vs.Add(cur_v);
foreach (MeshEdge e in cur_v.Edges)
{
if (edtable.ContainsKey(e))
{
if (edtable[e] && e.V1 == cur_v)
{
cur_v = e.V2;
break;
}
if (!edtable[e] && e.V2 == cur_v)
{
cur_v = e.V1;
break;
}
}
}
if (cur_v == vs.Last())
{
throw new Exception("Unknown Error");
}
}
List <MeshFacet> oldfacets = new List <MeshFacet>(ParentWindow.Model.SelectedFacets);
foreach (MeshFacet f in oldfacets)
{
ParentWindow.Model.RemoveFacet(f);
}
foreach (MeshEdge e in dup_edges)
{
ParentWindow.Model.RemoveEdge(e);
}
ParentWindow.Model.AddFacet(vs.ToArray());
ParentWindow.Model.UpdateAll();
}
public MeshFacet AddTriangle(Vector3 posdir, params MeshVertex[] vs)
{
// There should always be one edge that has connected with
// another facet to create a correct facet, otherwise the
// algorithm will create the facet corresponding to posdir
bool has_connected_edge = false;
// After sorting, vs[0] -> vs[1] -> vs[2] is a positive order
for (int i = 0; i < 2; i++)
{
for (int j = i + 1; j < 2; j++)
{
MeshEdge e = vs[i].EdgeConnecting(vs[j]);
if (e == null)
{
continue;
}
if (e.F1 != null)
{
has_connected_edge = true;
MeshVertex[] sorted_vs = new MeshVertex[3];
sorted_vs[0] = e.V2;
sorted_vs[1] = e.V1;
sorted_vs[2] = vs[3 - i - j];
vs = sorted_vs;
break;
}
if (e.F2 != null)
{
has_connected_edge = true;
MeshVertex[] sorted_vs = new MeshVertex[3];
sorted_vs[0] = e.V1;
sorted_vs[1] = e.V2;
sorted_vs[2] = vs[3 - i - j];
vs = sorted_vs;
break;
}
}
}
if (!has_connected_edge)
{
Vector3 normal = Vector3.Cross(
vs[1].Position - vs[0].Position,
vs[2].Position - vs[1].Position);
if (Vector3.Dot(posdir, normal) < 0)
{
MeshVertex[] sorted_vs = new MeshVertex[3];
sorted_vs[0] = vs[2];
sorted_vs[1] = vs[1];
sorted_vs[2] = vs[0];
vs = sorted_vs;
}
}
return(this.AddFacet(vs));
}
public MeshFacet AddFacet(params MeshVertex[] vs)
{
if (vs.Length < 3)
{
throw new Exception("Vertex count less than 3.");
}
for (int vi = 0; vi < vs.Length; vi++)
{
if (vs[vi] == vs[(vi + 1) % vs.Length])
{
throw new Exception("Ill-formed vertex sequence");
}
}
MeshFacet f = new MeshFacet(vs);
string failure = "";
for (int vi = 0; vi < vs.Length; vi++)
{
MeshVertex p1 = vs[vi];
MeshVertex p2 = vs[(vi + 1) % vs.Length];
MeshEdge e = AddEdge(p1, p2);
if (e.V1 == p1 && e.V2 == p2)
{
if (e.f1 != null)
{
failure = "Positive facet has been occupied";
break;
}
e.f1 = f;
}
else if (e.V1 == p2 && e.V2 == p1)
{
if (e.f2 != null)
{
failure = "Negative facet has been occupied";
break;
}
e.f2 = f;
}
else
{
throw new Exception("Unexpected edge");
}
}
// rollback
if (failure.Length > 0)
{
foreach (MeshEdge e in f.Edges)
{
if (e == null)
{
continue;
}
if (e.f1 == f)
{
e.f1 = null;
}
if (e.f2 == f)
{
e.f2 = null;
}
}
throw new Exception(failure);
}
int i = facets.Count;
facets.Add(f);
f.SetGraphInfo(this, i);
triangles += f.TrianglesCount;
return(f);
}
public MeshEdge AddEdge(MeshVertex p1, MeshVertex p2,
bool check_facet = false)
{
MeshEdge e = p1.EdgeConnecting(p2);
if (e != null)
{
return(e);
}
if (p1 == p2)
{
return(null);
}
e = new MeshEdge(p1, p2);
p1.adjacency.Add(p2, e);
p2.adjacency.Add(p1, e);
int i = edges.Count;
edges.Add(e);
e.SetGraphInfo(this, i);
if (check_facet)
{
// check the intersection
MeshFacet common_facet = null;
HashSet <MeshFacet> p1f = new HashSet <MeshFacet>(
p1.AdjacencyFacets);
foreach (MeshFacet f in p2.AdjacencyFacets)
{
if (p1f.Contains(f))
{
common_facet = f;
break;
}
}
if (common_facet != null)
{
List <MeshVertex> f1 = new List <MeshVertex>();
List <MeshVertex> f2 = new List <MeshVertex>();
List <MeshVertex> current = f1;
foreach (MeshVertex v in common_facet.Vertices)
{
// if current vertex matches p1 or p2, add this vertex
// to both vertex list and switch current to the other one
current.Add(v);
if (v == p1)
{
current = current == f1 ? f2 : f1;
current.Add(p1);
}
else if (v == p2)
{
current = current == f1 ? f2 : f1;
current.Add(p2);
}
}
this.RemoveFacet(common_facet);
this.AddFacet(f1.ToArray());
this.AddFacet(f2.ToArray());
}
}
return(e);
}
public MeshEdge(MeshVertex v1, MeshVertex v2)
{
p1 = v1;
p2 = v2;
}
