internal double GetTriangleAnglesQuality(g3.DMesh3 mesh)
{
Vector3d v0 = Vector3d.Zero, v1 = Vector3d.Zero, v2 = Vector3d.Zero;
mesh.GetTriVertices(meshIndex, ref v0, ref v1, ref v2);
Vector3d anglesD = Vector3d.Zero;
Vector3d e00 = (v1 - v0);
e00.Normalize();
Vector3d e01 = (v2 - v0);
e01.Normalize();
anglesD.x = Vector3d.AngleD(e00, e01);
Vector3d e10 = (v0 - v1);
e10.Normalize();
Vector3d e11 = (v2 - v1);
e11.Normalize();
anglesD.y = Vector3d.AngleD(e10, e11);
anglesD.z = 180 - anglesD.x - anglesD.y;
double resultA = Math.Min(Math.Min(Math.Abs(anglesD.x - 90) / 10.0, Math.Abs(anglesD.y - 90) / 10.0), Math.Abs(anglesD.z - 90) / 10.0);
double resultB = Math.Abs(anglesD.x - 60) / 30.0 + Math.Abs(anglesD.y - 60) / 30.0 + Math.Abs(anglesD.z - 60) / 30.0;
double result = Math.Min(resultA, resultB);
return(Math.Pow(result, 3));
}
internal double CompuateAverageArea(g3.DMesh3 mesh)
{
double area = this.TriangleArea(mesh);
foreach (var n in neighbors)
{
area += n.TriangleArea(mesh);
}
area /= (neighbors.Count + 1);
return(area);
}
internal bool Randomize(g3.DMesh3 mesh, DMeshAABBTree3 tree, Random r, double max, double moveTries, double average)
{
bool result = false;
for (int i = 0; i < moveTries; i++)
{
result |= this.RandomAdjust(mesh, tree, r, max, moveTries, average);
//foreach (var n in neighbors)
// result |= n.RandomAdjust(mesh, tree, r, max, moveTries, average);
}
return(result);
}
public static g3.DMesh3 ConvertToD3Mesh(Rhino.Geometry.Mesh mesh)
{
g3.DMesh3 ret = new g3.DMesh3(true, false, false, false);
if (mesh.Normals.Count < mesh.Vertices.Count)
{
mesh.Normals.ComputeNormals();
}
if (mesh.Normals.Count != mesh.Vertices.Count)
{
return(ret);
}
for (int i = 0; i < mesh.Vertices.Count; i++)
{
var vertex = new g3.NewVertexInfo();
vertex.n = new g3.Vector3f(mesh.Normals[i].X, mesh.Normals[i].Y, mesh.Normals[i].Z);
vertex.v = new g3.Vector3d(mesh.Vertices[i].X, mesh.Vertices[i].Y, mesh.Vertices[i].Z);
ret.AppendVertex(vertex);
}
foreach (var mf in mesh.Faces)
{
if (mf.IsQuad)
{
double dist1 = mesh.Vertices[mf.A].DistanceTo(mesh.Vertices[mf.C]);
double dist2 = mesh.Vertices[mf.B].DistanceTo(mesh.Vertices[mf.D]);
if (dist1 > dist2)
{
ret.AppendTriangle(mf.A, mf.B, mf.D);
ret.AppendTriangle(mf.B, mf.C, mf.D);
}
else
{
ret.AppendTriangle(mf.A, mf.B, mf.C);
ret.AppendTriangle(mf.A, mf.C, mf.D);
}
}
else
{
ret.AppendTriangle(mf.A, mf.B, mf.C);
}
}
return(ret);
}
double GetNormalQuality(g3.DMesh3 mesh, g3.Vector3d target, int depth)
{
if (depth == 0)
{
return(1 - (mesh.GetTriNormal(meshIndex).Dot(target)));
}
double amount = GetNormalQuality(mesh, target, 0);
foreach (var n in neighbors)
{
amount += GetNormalQuality(mesh, target, depth - 1);
}
return(amount);
}
internal double GetTriangleTotalAnglesQualityHelper(g3.DMesh3 mesh, int depth)
{
double total = GetTriangleAnglesQuality(mesh);
if (depth == 0)
{
return(total);
}
foreach (var n in neighbors)
{
total += GetTriangleTotalAnglesQualityHelper(mesh, depth - 1);
}
return(total / (neighbors.Count + 1));
}
internal double HowCloseToTargetArea(g3.DMesh3 mesh, double targetArea, int depth)
{
double area = Math.Pow(Math.Abs(this.TriangleArea(mesh) - targetArea) / targetArea, 3) * 3;
if (depth == 0)
{
return(area);
}
foreach (var n in neighbors)
{
area += n.HowCloseToTargetArea(mesh, targetArea, depth - 1);
}
return(area / (neighbors.Count + 1));
}
public static Rhino.Geometry.Mesh ConvertToRhinoMesh(g3.DMesh3 largeMesh)
{
var mesh = new g3.DMesh3();
mesh.CompactCopy(largeMesh);
Rhino.Geometry.Mesh ret = new Rhino.Geometry.Mesh();
foreach (var p in mesh.Vertices())
{
ret.Vertices.Add(new Rhino.Geometry.Point3d(p.x, p.y, p.z));
}
ret.Normals.Count = ret.Vertices.Count;
for (int i = 0; i < ret.Vertices.Count; i++)
{
var n = mesh.GetVertexNormal(i);
ret.Normals[i] = new Rhino.Geometry.Vector3f(n.x, n.y, n.z);
}
foreach (var f in mesh.Triangles())
{
if (f.a >= 0 && f.a < ret.Vertices.Count &&
f.b >= 0 && f.b < ret.Vertices.Count &&
f.c >= 0 && f.c < ret.Vertices.Count)
{
ret.Faces.AddFace(new Rhino.Geometry.MeshFace(f.a, f.b, f.c));
}
else
{
Rhino.RhinoApp.WriteLine("Error Triangle:" + f.a + "," + f.b + ",", +f.c);
}
}
ret.Normals.ComputeNormals();
return(ret);
}
public DSubmesh3(DMesh3 mesh, IEnumerable <int> subTriangles, int nTriEstimate = 0)
{
BaseMesh = mesh;
compute(subTriangles, nTriEstimate);
}
public static DMesh3 RemeshMesh(g3.DMesh3 mesh, float minEdgeLength, float maxEdgeLength, float contraintAngle, float smoothSpeed, int smoothPasses, List <Line3d> constrainedLines)
{
// construct mesh projection target
DMesh3 meshCopy = new DMesh3(mesh);
DMeshAABBTree3 tree = new DMeshAABBTree3(meshCopy);
tree.Build();
MeshProjectionTarget target = new MeshProjectionTarget()
{
Mesh = meshCopy,
Spatial = tree
};
MeshConstraints cons = new MeshConstraints();
EdgeRefineFlags useFlags = EdgeRefineFlags.NoFlip;
foreach (int eid in mesh.EdgeIndices())
{
double fAngle = MeshUtil.OpeningAngleD(mesh, eid);
Index2i ev = mesh.GetEdgeV(eid);
if (fAngle > contraintAngle)
{
cons.SetOrUpdateEdgeConstraint(eid, new EdgeConstraint(useFlags));
// TODO Ids based off of ?? What?
int nSetID0 = (mesh.GetVertex(ev[0]).y > 1) ? 1 : 2;
int nSetID1 = (mesh.GetVertex(ev[1]).y > 1) ? 1 : 2;
cons.SetOrUpdateVertexConstraint(ev[0], new VertexConstraint(true, nSetID0));
cons.SetOrUpdateVertexConstraint(ev[1], new VertexConstraint(true, nSetID1));
}
Vector3d p1 = mesh.GetVertex(ev.a);
Vector3d p2 = mesh.GetVertex(ev.b);
foreach (var v in constrainedLines)
{
if (p1.CompareTo(v.Origin) == 0)
{
Vector3d p = v.PointAt(1.0);
if (p2.CompareTo(p) == 0)
{
cons.SetOrUpdateEdgeConstraint(eid, EdgeConstraint.FullyConstrained);
break;
}
}
}
foreach (var v in constrainedLines)
{
if (p2.CompareTo(v.Origin) == 0)
{
Vector3d p = v.PointAt(1.0);
if (p1.CompareTo(p) == 0)
{
cons.SetOrUpdateEdgeConstraint(eid, EdgeConstraint.FullyConstrained);
break;
}
}
}
}
Remesher r = new Remesher(mesh);
r.SetExternalConstraints(cons);
r.SetProjectionTarget(target);
r.Precompute();
r.EnableFlips = r.EnableSplits = r.EnableCollapses = true;
r.MinEdgeLength = minEdgeLength; //0.1f;
r.MaxEdgeLength = maxEdgeLength; // 0.2f;
r.EnableSmoothing = true;
r.SmoothSpeedT = smoothSpeed; // .5;
for (int k = 0; k < smoothPasses; ++k) // smoothPasses = 20
{
r.BasicRemeshPass();
}
return(mesh);
}
//
public static DMesh3 RemeshMeshNew(g3.DMesh3 mesh, float minEdgeLength, float maxEdgeLength, float contraintAngle, float smoothSpeed, int smoothPasses, g3.DMesh3 projectMeshInput = null, float projectAmount = 1.0f, float projectedDistance = float.MaxValue)
{
g3.DMesh3 projectMesh = projectMeshInput;
if (projectMesh == null)
{
projectMesh = mesh;
}
DMesh3 projectMeshCopy = new DMesh3(projectMesh);
DMeshAABBTree3 treeProject = new DMeshAABBTree3(projectMeshCopy);
treeProject.Build();
GopherMeshProjectionTarget targetProject = new GopherMeshProjectionTarget()
{
Mesh = projectMeshCopy,
Spatial = treeProject,
amount = projectAmount,
maxDistance = projectedDistance
};
MeshConstraints cons = new MeshConstraints();
EdgeRefineFlags useFlags = EdgeRefineFlags.NoFlip;
foreach (int eid in mesh.EdgeIndices())
{
double fAngle = MeshUtil.OpeningAngleD(mesh, eid);
if (fAngle > contraintAngle)
{
cons.SetOrUpdateEdgeConstraint(eid, new EdgeConstraint(useFlags));
Index2i ev = mesh.GetEdgeV(eid);
//int nSetID0 = (mesh.GetVertex(ev[0]).y > 1) ? 1 : 2;
//int nSetID1 = (mesh.GetVertex(ev[1]).y > 1) ? 1 : 2;
cons.SetOrUpdateVertexConstraint(ev[0], new VertexConstraint(true));
cons.SetOrUpdateVertexConstraint(ev[1], new VertexConstraint(true));
}
}
// TODO Constrain Vertices too far away
foreach (int vid in mesh.VertexIndices())
{
var v = mesh.GetVertex(vid);
//v.Distance()
//targetProject.Project()
}
Remesher rProjected = new Remesher(mesh);
rProjected.SetExternalConstraints(cons);
rProjected.SetProjectionTarget(targetProject);
rProjected.Precompute();
rProjected.EnableFlips = rProjected.EnableSplits = rProjected.EnableCollapses = true;
rProjected.MinEdgeLength = minEdgeLength; //0.1f;
rProjected.MaxEdgeLength = maxEdgeLength; // 0.2f;
rProjected.EnableSmoothing = true;
rProjected.SmoothSpeedT = smoothSpeed; // .5;
if (projectMeshInput != null)
{
float bestSmoothPassProjectAmount = projectAmount / smoothPasses;
float testbestSmoothPassProjectAmount = float.MaxValue;
for (float smoothPassProjectAmount = -.1f; smoothPassProjectAmount < 1.1f; smoothPassProjectAmount += 0.005f)
{
double test = 0;
for (int i = 0; i < smoothPasses; i++)
{
test = 1.0 * smoothPassProjectAmount + test * (1 - smoothPassProjectAmount);
}
if (Math.Abs(test - projectAmount) < Math.Abs(testbestSmoothPassProjectAmount - projectAmount))
{
bestSmoothPassProjectAmount = (float)smoothPassProjectAmount;
testbestSmoothPassProjectAmount = (float)test;
}
}
targetProject.amount = bestSmoothPassProjectAmount;
targetProject.maxDistance = projectedDistance;
for (int k = 0; k < smoothPasses; ++k) // smoothPasses = 20
{
rProjected.BasicRemeshPass();
}
}
else
{
for (int k = 0; k < smoothPasses; ++k) // smoothPasses = 20
{
rProjected.BasicRemeshPass();
}
}
return(mesh);
}
public LaplacianMeshDeformer(DMesh3 mesh)
{
Mesh = mesh;
Util.gDevAssert(mesh.IsCompact);
}
internal double TriangleArea(g3.DMesh3 mesh)
{
return(mesh.GetTriArea(meshIndex));
}
public MeshBoundaryLoops(DMesh3 mesh)
{
this.Mesh = mesh;
Compute();
}
public MeshProjectionTarget(DMesh3 mesh, ISpatial spatial)
{
Mesh = mesh;
Spatial = spatial;
}
static List <int> walk_edge_span_forward(DMesh3 mesh, int start_edge, int start_pivot_v, HashSet <int> EdgeSet, out bool bClosedLoop)
{
bClosedLoop = false;
List <int> edgeSpan = new List <int>();
edgeSpan.Add(start_edge);
// we update this as we step
//int cur_edge = start_edge;
int cur_pivot_v = start_pivot_v;
int stop_pivot_v = IndexUtil.find_edge_other_v(mesh.GetEdgeV(start_edge), start_pivot_v);
Util.gDevAssert(stop_pivot_v != DMesh3.InvalidID);
bool done = false;
while (!done)
{
// fink outgoing edge in set and connected to current pivot vtx
int next_edge = -1;
foreach (int nbr_edge in mesh.VtxEdgesItr(cur_pivot_v))
{
if (EdgeSet.Contains(nbr_edge))
{
next_edge = nbr_edge;
break;
}
}
// could not find - must be done span
if (next_edge == -1)
{
done = true;
break;
}
// figure out next pivot vtx (is 'other' from current pivot on next edge)
Index2i next_edge_v = mesh.GetEdgeV(next_edge);
if (next_edge_v.a == cur_pivot_v)
{
cur_pivot_v = next_edge_v.b;
}
else if (next_edge_v.b == cur_pivot_v)
{
cur_pivot_v = next_edge_v.a;
}
else
{
throw new Exception("walk_edge_span_forward: found valid next edge but not connected to previous vertex??");
}
edgeSpan.Add(next_edge);
EdgeSet.Remove(next_edge);
// if this happens, we closed a loop
if (cur_pivot_v == stop_pivot_v)
{
done = true;
bClosedLoop = true;
}
}
return(edgeSpan);
}
public MeshIsoCurves(DMesh3 mesh, Func <Vector3d, double> valueF)
{
Mesh = mesh;
ValueF = valueF;
}
public Remesher(DMesh3 m) : base(m)
{
}
public IndexHashSet BaseBorderV; // list of border vertex indices on base mesh
public DSubmesh3(DMesh3 mesh, int[] subTriangles)
{
BaseMesh = mesh;
compute(subTriangles, subTriangles.Length);
}
public DMeshIntersectionTarget(DMesh3 mesh, ISpatial spatial)
{
Mesh = mesh;
Spatial = spatial;
}
internal bool RandomAdjust(g3.DMesh3 mesh, DMeshAABBTree3 tree, Random r, double max, double moveTries, double targetArea)
{
bool moved = false;
if (this.locked)
{
return(false);
}
for (int i = 0; i < moveTries; i++)
{
var v0 = mesh.GetVertex(vertex_index.a);
var v1 = mesh.GetVertex(vertex_index.b);
var v2 = mesh.GetVertex(vertex_index.c);
var v0_old = mesh.GetVertex(vertex_index.a);
var v1_old = mesh.GetVertex(vertex_index.b);
var v2_old = mesh.GetVertex(vertex_index.c);
v0.x += (r.NextDouble() * max * 2 - max);
v0.y += (r.NextDouble() * max * 2 - max);
v0.z += (r.NextDouble() * max * 2 - max);
v1.x += (r.NextDouble() * max * 2 - max);
v1.y += (r.NextDouble() * max * 2 - max);
v1.z += (r.NextDouble() * max * 2 - max);
v2.x += (r.NextDouble() * max * 2 - max);
v2.y += (r.NextDouble() * max * 2 - max);
v2.z += (r.NextDouble() * max * 2 - max);
int tNearestID = tree.FindNearestTriangle(v0);
DistPoint3Triangle3 q = MeshQueries.TriangleDistance(tree.Mesh, tNearestID, v0);
v0 = q.TriangleClosest;
tNearestID = tree.FindNearestTriangle(v1);
q = MeshQueries.TriangleDistance(tree.Mesh, tNearestID, v1);
v1 = q.TriangleClosest;
tNearestID = tree.FindNearestTriangle(v2);
q = MeshQueries.TriangleDistance(tree.Mesh, tNearestID, v2);
v2 = q.TriangleClosest;
double oldArea = (HowCloseToTargetArea(mesh, targetArea, 2) / targetArea) * 3;
double oldAngleQuality = GetTriangleTotalAnglesQualityHelper(mesh, 2);
var n = mesh.GetTriNormal(meshIndex);
double oldNormalQuality = GetNormalQuality(mesh, n, 2) * 6;
mesh.SetVertex(vertex_index.a, v0);
mesh.SetVertex(vertex_index.b, v1);
mesh.SetVertex(vertex_index.c, v2);
double newArea = (HowCloseToTargetArea(mesh, targetArea, 2) / targetArea) * 3;
double newAngleQuality = GetTriangleTotalAnglesQualityHelper(mesh, 2);
double newNormalQuality = GetNormalQuality(mesh, n, 2) * 6;
if ((oldArea + oldAngleQuality + oldNormalQuality) < (newArea + newAngleQuality + newNormalQuality))
{
mesh.SetVertex(vertex_index.a, v0_old);
mesh.SetVertex(vertex_index.b, v1_old);
mesh.SetVertex(vertex_index.c, v2_old);
}
else
{
moved = true;
}
}
return(moved);
}
public static bool RandomizeMesh(g3.DMesh3 mesh, out g3.DMesh3 outputMesh, double amount, double moveTries)
{
System.Collections.Generic.SortedDictionary <int, MeshNode> faces = new System.Collections.Generic.SortedDictionary <int, MeshNode>();
int index = 0;
foreach (var meshFaceIndex in mesh.TriangleIndices())
{
var frame = mesh.GetTriFrame(meshFaceIndex);
g3.Index3i neighbors = mesh.GetTriNeighbourTris(meshFaceIndex);
g3.Index3i vertex_index = mesh.GetTriangle(meshFaceIndex);
faces.Add(meshFaceIndex, new MeshNode(index++, meshFaceIndex, frame, neighbors, vertex_index));
}
foreach (var f in faces)
{
f.Value.neighbors.Clear();
f.Value.neighbors.Capacity = 3;
for (int i = 0; i < 3; ++i)
{
int fn = f.Value.neighbors_index[i];
if (fn >= 0)
{
f.Value.neighbors.Add(faces[fn]);
}
}
if (f.Value.neighbors.Count < 3)
{
f.Value.locked = true;
foreach (var n in f.Value.neighbors)
{
n.locked = true;
}
}
}
DMesh3 projectMeshCopy = new DMesh3(mesh);
outputMesh = new DMesh3(mesh);
if (faces.Count == 0)
{
return(false);
}
DMeshAABBTree3 treeProject = new DMeshAABBTree3(projectMeshCopy);
treeProject.Build();
Random r = new Random();
bool result = false;
//for (int i = 0; i < moveTries; i++)
//{
double faceArea = 0;
foreach (var f in faces)
{
faceArea += f.Value.TriangleArea(outputMesh);
}
faceArea /= faces.Count;
foreach (var f in faces)
{
result |= f.Value.Randomize(outputMesh, treeProject, r, amount, moveTries, faceArea);
}
double newFaceArea = 0;
foreach (var f in faces)
{
newFaceArea += f.Value.TriangleArea(outputMesh);
}
newFaceArea /= faces.Count;
return(result);
}
public MeshConnectedComponents(DMesh3 mesh)
{
Mesh = mesh;
Components = new List <Component>();
}
public bool Fill()
{
compute_polygon();
// translate/scale fill loops to unit box. This will improve
// accuracy in the calcs below...
Vector2d shiftOrigin = Bounds.Center;
double scale = 1.0 / Bounds.MaxDim;
SpansPoly.Translate(-shiftOrigin);
SpansPoly.Scale(scale * Vector2d.One, Vector2d.Zero);
Dictionary <PlanarComplex.Element, int> ElemToLoopMap = new Dictionary <PlanarComplex.Element, int>();
// generate planar mesh that we will insert polygons into
MeshGenerator meshgen;
float planeW = 1.5f;
int nDivisions = 0;
if (FillTargetEdgeLen < double.MaxValue && FillTargetEdgeLen > 0)
{
int n = (int)((planeW / (float)scale) / FillTargetEdgeLen) + 1;
nDivisions = (n <= 1) ? 0 : n;
}
if (nDivisions == 0)
{
meshgen = new TrivialRectGenerator()
{
IndicesMap = new Index2i(1, 2), Width = planeW, Height = planeW,
};
}
else
{
meshgen = new GriddedRectGenerator()
{
IndicesMap = new Index2i(1, 2), Width = planeW, Height = planeW,
EdgeVertices = nDivisions
};
}
DMesh3 FillMesh = meshgen.Generate().MakeDMesh();
FillMesh.ReverseOrientation(); // why?!?
int[] polyVertices = null;
// insert each poly
MeshInsertUVPolyCurve insert = new MeshInsertUVPolyCurve(FillMesh, SpansPoly);
ValidationStatus status = insert.Validate(MathUtil.ZeroTolerancef * scale);
bool failed = true;
if (status == ValidationStatus.Ok)
{
if (insert.Apply())
{
insert.Simplify();
polyVertices = insert.CurveVertices;
failed = false;
}
}
if (failed)
{
return(false);
}
// remove any triangles not contained in gpoly
// [TODO] degenerate triangle handling? may be 'on' edge of gpoly...
List <int> removeT = new List <int>();
foreach (int tid in FillMesh.TriangleIndices())
{
Vector3d v = FillMesh.GetTriCentroid(tid);
if (SpansPoly.Contains(v.xy) == false)
{
removeT.Add(tid);
}
}
foreach (int tid in removeT)
{
FillMesh.RemoveTriangle(tid, true, false);
}
//Util.WriteDebugMesh(FillMesh, "c:\\scratch\\CLIPPED_MESH.obj");
// transform fill mesh back to 3d
MeshTransforms.PerVertexTransform(FillMesh, (v) => {
Vector2d v2 = v.xy;
v2 /= scale;
v2 += shiftOrigin;
return(to3D(v2));
});
//Util.WriteDebugMesh(FillMesh, "c:\\scratch\\PLANAR_MESH_WITH_LOOPS.obj");
//Util.WriteDebugMesh(MeshEditor.Combine(FillMesh, Mesh), "c:\\scratch\\FILLED_MESH.obj");
// figure out map between new mesh and original edge loops
// [TODO] if # of verts is different, we can still find correspondence, it is just harder
// [TODO] should check that edges (ie sequential verts) are boundary edges on fill mesh
// if not, can try to delete nbr tris to repair
IndexMap mergeMapV = new IndexMap(true);
if (MergeFillBoundary && polyVertices != null)
{
throw new NotImplementedException("PlanarSpansFiller: merge fill boundary not implemented!");
//int[] fillLoopVerts = polyVertices;
//int NV = fillLoopVerts.Length;
//PlanarComplex.Element sourceElem = (pi == 0) ? gsolid.Outer : gsolid.Holes[pi - 1];
//int loopi = ElemToLoopMap[sourceElem];
//EdgeLoop sourceLoop = Loops[loopi].edgeLoop;
//for (int k = 0; k < NV; ++k) {
// Vector3d fillV = FillMesh.GetVertex(fillLoopVerts[k]);
// Vector3d sourceV = Mesh.GetVertex(sourceLoop.Vertices[k]);
// if (fillV.Distance(sourceV) < MathUtil.ZeroTolerancef)
// mergeMapV[fillLoopVerts[k]] = sourceLoop.Vertices[k];
//}
}
// append this fill to input mesh
MeshEditor editor = new MeshEditor(Mesh);
int[] mapV;
editor.AppendMesh(FillMesh, mergeMapV, out mapV, Mesh.AllocateTriangleGroup());
// [TODO] should verify that we actually merged the loops...
return(true);
}
// compute distance from point to triangle ti in mesh, with minimal extra objects/etc
// TODO: take in current-max-distance so we can early-out?
public static double TriDistanceSqr(DMesh3 mesh, int ti, Vector3d point)
{
Vector3d V0 = Vector3d.Zero, V1 = Vector3d.Zero, V2 = Vector3d.Zero;
mesh.GetTriVertices(ti, ref V0, ref V1, ref V2);
Vector3d diff = V0 - point;
Vector3d edge0 = V1 - V0;
Vector3d edge1 = V2 - V0;
double a00 = edge0.LengthSquared;
double a01 = edge0.Dot(edge1);
double a11 = edge1.LengthSquared;
double b0 = diff.Dot(edge0);
double b1 = diff.Dot(edge1);
double c = diff.LengthSquared;
double det = Math.Abs(a00 * a11 - a01 * a01);
double s = a01 * b1 - a11 * b0;
double t = a01 * b0 - a00 * b1;
double sqrDistance;
if (s + t <= det)
{
if (s < 0)
{
if (t < 0) // region 4
{
if (b0 < 0)
{
t = 0;
if (-b0 >= a00)
{
s = 1;
sqrDistance = a00 + (2) * b0 + c;
}
else
{
s = -b0 / a00;
sqrDistance = b0 * s + c;
}
}
else
{
s = 0;
if (b1 >= 0)
{
t = 0;
sqrDistance = c;
}
else if (-b1 >= a11)
{
t = 1;
sqrDistance = a11 + (2) * b1 + c;
}
else
{
t = -b1 / a11;
sqrDistance = b1 * t + c;
}
}
}
else // region 3
{
s = 0;
if (b1 >= 0)
{
t = 0;
sqrDistance = c;
}
else if (-b1 >= a11)
{
t = 1;
sqrDistance = a11 + (2) * b1 + c;
}
else
{
t = -b1 / a11;
sqrDistance = b1 * t + c;
}
}
}
else if (t < 0) // region 5
{
t = 0;
if (b0 >= 0)
{
s = 0;
sqrDistance = c;
}
else if (-b0 >= a00)
{
s = 1;
sqrDistance = a00 + (2) * b0 + c;
}
else
{
s = -b0 / a00;
sqrDistance = b0 * s + c;
}
}
else // region 0
// minimum at interior point
{
double invDet = (1) / det;
s *= invDet;
t *= invDet;
sqrDistance = s * (a00 * s + a01 * t + (2) * b0) +
t * (a01 * s + a11 * t + (2) * b1) + c;
}
}
else
{
double tmp0, tmp1, numer, denom;
if (s < 0) // region 2
{
tmp0 = a01 + b0;
tmp1 = a11 + b1;
if (tmp1 > tmp0)
{
numer = tmp1 - tmp0;
denom = a00 - (2) * a01 + a11;
if (numer >= denom)
{
s = 1;
t = 0;
sqrDistance = a00 + (2) * b0 + c;
}
else
{
s = numer / denom;
t = 1 - s;
sqrDistance = s * (a00 * s + a01 * t + (2) * b0) +
t * (a01 * s + a11 * t + (2) * b1) + c;
}
}
else
{
s = 0;
if (tmp1 <= 0)
{
t = 1;
sqrDistance = a11 + (2) * b1 + c;
}
else if (b1 >= 0)
{
t = 0;
sqrDistance = c;
}
else
{
t = -b1 / a11;
sqrDistance = b1 * t + c;
}
}
}
else if (t < 0) // region 6
{
tmp0 = a01 + b1;
tmp1 = a00 + b0;
if (tmp1 > tmp0)
{
numer = tmp1 - tmp0;
denom = a00 - (2) * a01 + a11;
if (numer >= denom)
{
t = 1;
s = 0;
sqrDistance = a11 + (2) * b1 + c;
}
else
{
t = numer / denom;
s = 1 - t;
sqrDistance = s * (a00 * s + a01 * t + (2) * b0) +
t * (a01 * s + a11 * t + (2) * b1) + c;
}
}
else
{
t = 0;
if (tmp1 <= 0)
{
s = 1;
sqrDistance = a00 + (2) * b0 + c;
}
else if (b0 >= 0)
{
s = 0;
sqrDistance = c;
}
else
{
s = -b0 / a00;
sqrDistance = b0 * s + c;
}
}
}
else // region 1
{
numer = a11 + b1 - a01 - b0;
if (numer <= 0)
{
s = 0;
t = 1;
sqrDistance = a11 + (2) * b1 + c;
}
else
{
denom = a00 - (2) * a01 + a11;
if (numer >= denom)
{
s = 1;
t = 0;
sqrDistance = a00 + (2) * b0 + c;
}
else
{
s = numer / denom;
t = 1 - s;
sqrDistance = s * (a00 * s + a01 * t + (2) * b0) +
t * (a01 * s + a11 * t + (2) * b1) + c;
}
}
}
}
if (sqrDistance < 0)
{
sqrDistance = 0;
}
return(sqrDistance);
}
public GraphSupportGenerator(DMesh3 mesh, DMeshAABBTree3 spatial, double cellSize)
{
Mesh = mesh;
MeshSpatial = spatial;
CellSize = cellSize;
}
public Remesher(DMesh3 m)
{
mesh = m;
}
//public static void VoronoiMesh(List<g3.PolyLine3d> mesh, out List<g3.Line3d> listLines, out List<g3.PolyLine3d> listPolylines)
//{
// System.Collections.Generic.SortedDictionary<int, MeshNode> faces = new System.Collections.Generic.SortedDictionary<int, MeshNode>();
// int index = 0;
// foreach (var meshFaceIndex in mesh.TriangleIndices())
// {
// var frame = mesh.GetTriFrame(meshFaceIndex);
// g3.Index3i neighbors = mesh.GetTriNeighbourTris(meshFaceIndex);
// g3.Index3i vertex_index = mesh.GetTriangle(meshFaceIndex);
// faces.Add(meshFaceIndex, new MeshNode(index++, meshFaceIndex, frame, neighbors, vertex_index));
// }
// foreach (var f in faces)
// {
// f.Value.neighbors.Clear();
// f.Value.neighbors.Capacity = 3;
// for (int i = 0; i < 3; ++i)
// {
// int fn = f.Value.neighbors_index[i];
// if (fn >= 0)
// f.Value.neighbors.Add(faces[fn]);
// }
// if (f.Value.neighbors.Count < 3)
// {
// f.Value.locked = true;
// foreach (var n in f.Value.neighbors)
// n.locked = true;
// }
// }
// outputMesh = new g3.DMesh3(g3.MeshComponents.None);
// listLines = new List<g3.Line3d>();
// listPolylines = new List<g3.PolyLine3d>();
// foreach (var f in faces)
// {
// outputMesh.AppendVertex(f.Value.frame.Origin);
// }
// HashSet<int> processedPoints = new HashSet<int>();
// foreach (var f in faces)
// {
// for (int i = 0; i < 3; i++)
// {
// List<int> outputLine = new List<int>();
// if (processedPoints.Contains(f.Value.vertex_index[i]))
// continue;
// int checkVertex = f.Value.vertex_index[i];
// MeshNode currentFaces = f.Value;
// MeshNode prevFace = null;
// bool fullLoop = false;
// while (true)
// {
// for (int j = 0; j < currentFaces.neighbors.Count; j++)
// {
// var neighbor = currentFaces.neighbors[j];
// if (neighbor.UsesVertex(checkVertex))
// {
// if (neighbor == prevFace)
// continue;
// if (neighbor == f.Value)
// {
// fullLoop = true;
// break; // Found full loop
// }
// outputLine.Add(neighbor.index);
// prevFace = currentFaces;
// currentFaces = neighbor;
// j = -1;
// }
// }
// break;
// }
// if (fullLoop)
// {
// processedPoints.Add(checkVertex);
// var polyline = new g3.PolyLine3d();
// if (outputLine.Count > 2)
// {
// g3.Vector3d centerPoint = f.Value.frame.Origin;
// foreach (var p in outputLine)
// centerPoint += outputMesh.GetVertex(p);
// centerPoint /= (outputLine.Count + 1);
// int center = outputMesh.AppendVertex(centerPoint);
// var pS = outputMesh.GetVertex(f.Value.index);
// var p0 = outputMesh.GetVertex(outputLine[0]);
// var pE = outputMesh.GetVertex(outputLine[outputLine.Count - 1]);
// var normal = mesh.GetTriNormal(f.Value.meshIndex);
// polyline.AppendVertex(pS);
// polyline.AppendVertex(p0);
// listLines.Add(new g3.Line3d(pS, p0 - pS));
// var n = MathUtil.Normal(centerPoint, pS, p0);
// bool reverseTri = n.Dot(normal) < 0;
// if (!reverseTri)
// outputMesh.AppendTriangle(center, f.Value.index, outputLine[0]);
// else
// outputMesh.AppendTriangle(center, outputLine[0], f.Value.index);
// for (int j = 0; j < outputLine.Count - 1; j++)
// {
// var p1 = outputMesh.GetVertex(outputLine[j]);
// var p2 = outputMesh.GetVertex(outputLine[j + 1]);
// listLines.Add(new g3.Line3d(p1, p2 - p1));
// polyline.AppendVertex(p2);
// if (!reverseTri)
// outputMesh.AppendTriangle(center, outputLine[j], outputLine[j + 1]);
// else
// outputMesh.AppendTriangle(center, outputLine[j + 1], outputLine[j]);
// }
// polyline.AppendVertex(pS);
// listLines.Add(new g3.Line3d(pE, pS - pE));
// listPolylines.Add(polyline);
// if (!reverseTri)
// outputMesh.AppendTriangle(center, outputLine[outputLine.Count - 1], f.Value.index);
// else
// outputMesh.AppendTriangle(center, f.Value.index, outputLine[outputLine.Count - 1]);
// }
// }
// }
// }
//}
public static void VoronoiMesh(g3.DMesh3 mesh, out g3.DMesh3 outputMesh, out List <g3.Line3d> listLines, out List <g3.PolyLine3d> listPolylines)
{
System.Collections.Generic.SortedDictionary <int, MeshNode> faces = new System.Collections.Generic.SortedDictionary <int, MeshNode>();
int index = 0;
foreach (var meshFaceIndex in mesh.TriangleIndices())
{
var frame = mesh.GetTriFrame(meshFaceIndex);
g3.Index3i neighbors = mesh.GetTriNeighbourTris(meshFaceIndex);
g3.Index3i vertex_index = mesh.GetTriangle(meshFaceIndex);
faces.Add(meshFaceIndex, new MeshNode(index++, meshFaceIndex, frame, neighbors, vertex_index));
}
foreach (var f in faces)
{
f.Value.neighbors.Clear();
f.Value.neighbors.Capacity = 3;
for (int i = 0; i < 3; ++i)
{
int fn = f.Value.neighbors_index[i];
if (fn >= 0)
{
f.Value.neighbors.Add(faces[fn]);
}
}
if (f.Value.neighbors.Count < 3)
{
f.Value.locked = true;
foreach (var n in f.Value.neighbors)
{
n.locked = true;
}
}
}
outputMesh = new g3.DMesh3(g3.MeshComponents.None);
listLines = new List <g3.Line3d>();
listPolylines = new List <g3.PolyLine3d>();
foreach (var f in faces)
{
outputMesh.AppendVertex(f.Value.frame.Origin);
}
HashSet <int> processedPoints = new HashSet <int>();
foreach (var f in faces)
{
for (int i = 0; i < 3; i++)
{
List <int> outputLine = new List <int>();
if (processedPoints.Contains(f.Value.vertex_index[i]))
{
continue;
}
int checkVertex = f.Value.vertex_index[i];
MeshNode currentFaces = f.Value;
MeshNode prevFace = null;
bool fullLoop = false;
while (true)
{
for (int j = 0; j < currentFaces.neighbors.Count; j++)
{
var neighbor = currentFaces.neighbors[j];
if (neighbor.UsesVertex(checkVertex))
{
if (neighbor == prevFace)
{
continue;
}
if (neighbor == f.Value)
{
fullLoop = true;
break; // Found full loop
}
outputLine.Add(neighbor.index);
prevFace = currentFaces;
currentFaces = neighbor;
j = -1;
}
}
break;
}
if (fullLoop)
{
processedPoints.Add(checkVertex);
var polyline = new g3.PolyLine3d();
if (outputLine.Count > 2)
{
g3.Vector3d centerPoint = f.Value.frame.Origin;
foreach (var p in outputLine)
{
centerPoint += outputMesh.GetVertex(p);
}
centerPoint /= (outputLine.Count + 1);
int center = outputMesh.AppendVertex(centerPoint);
var pS = outputMesh.GetVertex(f.Value.index);
var p0 = outputMesh.GetVertex(outputLine[0]);
var pE = outputMesh.GetVertex(outputLine[outputLine.Count - 1]);
var normal = mesh.GetTriNormal(f.Value.meshIndex);
polyline.AppendVertex(pS);
polyline.AppendVertex(p0);
listLines.Add(new g3.Line3d(pS, p0 - pS));
var n = MathUtil.Normal(centerPoint, pS, p0);
bool reverseTri = n.Dot(normal) < 0;
if (!reverseTri)
{
outputMesh.AppendTriangle(center, f.Value.index, outputLine[0]);
}
else
{
outputMesh.AppendTriangle(center, outputLine[0], f.Value.index);
}
for (int j = 0; j < outputLine.Count - 1; j++)
{
var p1 = outputMesh.GetVertex(outputLine[j]);
var p2 = outputMesh.GetVertex(outputLine[j + 1]);
listLines.Add(new g3.Line3d(p1, p2 - p1));
polyline.AppendVertex(p2);
if (!reverseTri)
{
outputMesh.AppendTriangle(center, outputLine[j], outputLine[j + 1]);
}
else
{
outputMesh.AppendTriangle(center, outputLine[j + 1], outputLine[j]);
}
}
polyline.AppendVertex(pS);
listLines.Add(new g3.Line3d(pE, pS - pE));
listPolylines.Add(polyline);
if (!reverseTri)
{
outputMesh.AppendTriangle(center, outputLine[outputLine.Count - 1], f.Value.index);
}
else
{
outputMesh.AppendTriangle(center, f.Value.index, outputLine[outputLine.Count - 1]);
}
}
}
}
}
}
protected override Result RunCommand(RhinoDoc doc, RunMode mode)
{
bool bHavePreselectedObjects = false;
const ObjectType geometryFilter = ObjectType.MeshFace;
OptionDouble minEdgeLengthOption = new OptionDouble(minEdgeLength, 0.001, 200);
OptionDouble maxEdgeLengthOption = new OptionDouble(maxEdgeLength, 0.001, 200);
OptionDouble constriantAngleOption = new OptionDouble(constriantAngle, 0.001, 360);
OptionInteger smoothStepsOptions = new OptionInteger(smoothSteps, 0, 100);
OptionDouble smoothSpeedOption = new OptionDouble(smoothSpeed, 0.01, 1.0);
OptionDouble projectAmountOption = new OptionDouble(projectedAmount, 0.01, 1.0);
OptionDouble projectedDistanceOption = new OptionDouble(projectedDistance, 0.01, 100000.0);
GetObject go = new GetObject();
go.SetCommandPrompt("Select mesh faces to project onto another mesh");
go.GeometryFilter = geometryFilter;
go.AddOptionDouble("ConstraintAngle", ref constriantAngleOption);
go.AddOptionDouble("MinEdge", ref minEdgeLengthOption);
go.AddOptionDouble("MaxEdge", ref maxEdgeLengthOption);
go.AddOptionInteger("SmoothSteps", ref smoothStepsOptions);
go.AddOptionDouble("SmoothSpeed", ref smoothSpeedOption);
go.GroupSelect = true;
go.SubObjectSelect = true;
for (; ;)
{
GetResult faceres = go.GetMultiple(1, 0);
if (faceres == GetResult.Option)
{
go.EnablePreSelect(false, true);
continue;
}
else if (go.CommandResult() != Result.Success)
{
return(go.CommandResult());
}
if (go.ObjectsWerePreselected)
{
bHavePreselectedObjects = true;
go.EnablePreSelect(false, true);
continue;
}
break;
}
minEdgeLength = minEdgeLengthOption.CurrentValue;
maxEdgeLength = maxEdgeLengthOption.CurrentValue;
constriantAngle = constriantAngleOption.CurrentValue;
smoothSteps = smoothStepsOptions.CurrentValue;
smoothSpeed = smoothSpeedOption.CurrentValue;
//System.Collections.Generic.List<System.Guid> meshes = new System.Collections.Generic.List<System.Guid>();
System.Guid rhinoMesh = System.Guid.Empty;
System.Collections.Generic.List <int> removeFaces = new System.Collections.Generic.List <int>();
g3.DMesh3 projectFaces = new g3.DMesh3(true, false, false, false);
Rhino.Geometry.Mesh rhinoInputMesh = new Rhino.Geometry.Mesh();
for (int i = 0; i < go.ObjectCount; i++)
{
ObjRef obj = go.Object(i);
if (rhinoMesh == System.Guid.Empty)
{
rhinoMesh = obj.ObjectId;
rhinoInputMesh = obj.Mesh();
for (int j = 0; j < rhinoInputMesh.Vertices.Count; j++)
{
var vertex = new g3.NewVertexInfo();
vertex.n = new g3.Vector3f(rhinoInputMesh.Normals[j].X, rhinoInputMesh.Normals[j].Y, rhinoInputMesh.Normals[j].Z);
vertex.v = new g3.Vector3d(rhinoInputMesh.Vertices[j].X, rhinoInputMesh.Vertices[j].Y, rhinoInputMesh.Vertices[j].Z);
projectFaces.AppendVertex(vertex);
}
}
var m = rhinoInputMesh;
if (rhinoMesh != obj.ObjectId)
{
continue;
}
removeFaces.Add(obj.GeometryComponentIndex.Index);
var mf = rhinoInputMesh.Faces[obj.GeometryComponentIndex.Index];
if (mf.IsQuad)
{
double dist1 = m.Vertices[mf.A].DistanceTo(m.Vertices[mf.C]);
double dist2 = m.Vertices[mf.B].DistanceTo(m.Vertices[mf.D]);
if (dist1 > dist2)
{
projectFaces.AppendTriangle(mf.A, mf.B, mf.D);
projectFaces.AppendTriangle(mf.B, mf.C, mf.D);
}
else
{
projectFaces.AppendTriangle(mf.A, mf.B, mf.C);
projectFaces.AppendTriangle(mf.A, mf.C, mf.D);
}
}
else
{
projectFaces.AppendTriangle(mf.A, mf.B, mf.C);
}
}
if (rhinoInputMesh == null)
{
return(Result.Failure);
}
removeFaces.Sort();
removeFaces.Reverse();
foreach (var removeFace in removeFaces)
{
rhinoInputMesh.Faces.RemoveAt(removeFace);
}
rhinoInputMesh.Compact();
GetObject goProjected = new GetObject();
goProjected.EnablePreSelect(false, true);
goProjected.SetCommandPrompt("Select mesh to project to");
goProjected.GeometryFilter = ObjectType.Mesh;
goProjected.AddOptionDouble("ConstraintAngle", ref constriantAngleOption);
goProjected.AddOptionDouble("MinEdge", ref minEdgeLengthOption);
goProjected.AddOptionDouble("MaxEdge", ref maxEdgeLengthOption);
goProjected.AddOptionInteger("SmoothSteps", ref smoothStepsOptions);
goProjected.AddOptionDouble("SmoothSpeed", ref smoothSpeedOption);
goProjected.AddOptionDouble("ProjectAmount", ref projectAmountOption);
goProjected.AddOptionDouble("ProjectDistance", ref projectedDistanceOption);
goProjected.GroupSelect = true;
goProjected.SubObjectSelect = false;
goProjected.EnableClearObjectsOnEntry(false);
goProjected.EnableUnselectObjectsOnExit(false);
for (; ;)
{
GetResult resProject = goProjected.Get();
if (resProject == GetResult.Option)
{
continue;
}
else if (goProjected.CommandResult() != Result.Success)
{
return(goProjected.CommandResult());
}
break;
}
minEdgeLength = minEdgeLengthOption.CurrentValue;
maxEdgeLength = maxEdgeLengthOption.CurrentValue;
constriantAngle = constriantAngleOption.CurrentValue;
smoothSteps = smoothStepsOptions.CurrentValue;
smoothSpeed = smoothSpeedOption.CurrentValue;
projectedAmount = projectAmountOption.CurrentValue;
projectedDistance = projectedDistanceOption.CurrentValue;
if (bHavePreselectedObjects)
{
// Normally, pre-selected objects will remain selected, when a
// command finishes, and post-selected objects will be unselected.
// This this way of picking, it is possible to have a combination
// of pre-selected and post-selected. So, to make sure everything
// "looks the same", lets unselect everything before finishing
// the command.
for (int i = 0; i < go.ObjectCount; i++)
{
RhinoObject rhinoObject = go.Object(i).Object();
if (null != rhinoObject)
{
rhinoObject.Select(false);
}
}
doc.Views.Redraw();
}
bool result = false;
if (goProjected.ObjectCount < 1)
{
return(Result.Failure);
}
var rhinoMeshProject = goProjected.Object(0).Mesh();
if (rhinoMeshProject == null || !rhinoMeshProject.IsValid)
{
return(Result.Failure);
}
var meshProjected = GopherUtil.ConvertToD3Mesh(rhinoMeshProject);
var res = GopherUtil.RemeshMesh(projectFaces, (float)minEdgeLength, (float)maxEdgeLength, (float)constriantAngle, (float)smoothSpeed, smoothSteps, meshProjected, (float)projectedAmount, (float)projectedDistance);
var newRhinoMesh = GopherUtil.ConvertToRhinoMesh(res);
if (newRhinoMesh != null && newRhinoMesh.IsValid)
{
newRhinoMesh.Append(rhinoInputMesh);
result |= doc.Objects.Replace(rhinoMesh, newRhinoMesh);
}
doc.Views.Redraw();
return(Result.Success);
}
public PlanarSpansFiller(DMesh3 mesh, IList <EdgeSpan> spans)
{
Mesh = mesh;
FillSpans = new List <EdgeSpan>(spans);
Bounds = AxisAlignedBox2d.Empty;
}