public bool FindHitVertex(Ray3f sceneRay, MeshEditorOpType.BoundaryType boundaryMode, ref Frame3f hitFrameS, ref int hitVID)
{
Ray3f objRay = SceneTransforms.SceneToObject(Target, sceneRay);
int hit_tri = PreviewSpatial.FindNearestHitTriangle(objRay);
if (hit_tri == DMesh3.InvalidID)
{
return(false);
}
if (allow_backface_hits == false && is_back_facing(hit_tri))
{
return(false);
}
Index3i vt = PreviewMesh.GetTriangle(hit_tri);
hitVID = -1; double near_sqr = double.MaxValue;
for (int j = 0; j < 3; ++j)
{
Vector3f v = (Vector3f)PreviewMesh.GetVertex(vt[j]);
if (objRay.DistanceSquared(v) < near_sqr)
{
near_sqr = objRay.DistanceSquared(v);
hitVID = vt[j];
}
}
if (boundaryMode != MeshEditorOpType.BoundaryType.Any)
{
bool is_boundary = PreviewMesh.IsBoundaryVertex(hitVID);
if ((is_boundary && boundaryMode == MeshEditorOpType.BoundaryType.OnlyInternal) ||
(is_boundary == false && boundaryMode == MeshEditorOpType.BoundaryType.OnlyBoundary))
{
return(false);
}
}
Frame3f hitFrameL = new Frame3f(PreviewMesh.GetVertex(hitVID), PreviewMesh.GetTriNormal(hit_tri));
hitFrameS = SceneTransforms.ObjectToScene(previewSO, hitFrameL);
return(true);
}
public void CollapseEdge(int eid, Frame3f posL, bool bInteractive)
{
if (PreviewMesh.IsEdge(eid) == false)
{
DebugUtil.Log("MeshEditorTool.CollapseEdge: invalid eid!");
return;
}
Index2i ev = PreviewMesh.GetEdgeV(eid);
int keep = ev.a, discard = ev.b;
bool boundarya = PreviewMesh.IsBoundaryVertex(keep);
bool boundaryb = PreviewMesh.IsBoundaryVertex(discard);
if (boundaryb && !boundarya)
{
keep = ev.b; discard = ev.a;
}
HashSet <int> removeT = new HashSet <int>();
foreach (int tid in PreviewMesh.VtxTrianglesItr(keep))
{
removeT.Add(tid);
}
foreach (int tid in PreviewMesh.VtxTrianglesItr(discard))
{
removeT.Add(tid);
}
RemoveTrianglesMeshChange removeChange = null;
AddTrianglesMeshChange addChange = null;
previewSO.EditAndUpdateMesh((mesh) => {
removeChange = new RemoveTrianglesMeshChange();
removeChange.InitializeFromExisting(mesh, removeT);
DMesh3.EdgeCollapseInfo collapseInfo;
if (mesh.CollapseEdge(keep, discard, out collapseInfo) == MeshResult.Ok)
{
foreach (int tid in removeT)
{
PreviewSpatial.RemoveTriangle(tid);
}
foreach (int tid in PreviewMesh.VtxTrianglesItr(keep))
{
PreviewSpatial.AddTriangle(tid);
}
if (boundarya == false & boundaryb == false)
{
mesh.SetVertex(keep, posL.Origin);
}
addChange = new AddTrianglesMeshChange();
addChange.InitializeFromExisting(mesh, new List <int>()
{
keep
}, get_vtx_tris(mesh, keep));
}
}, GeometryEditTypes.ArbitraryEdit);
if (addChange != null)
{
add_replace_change(removeChange, addChange, bInteractive);
}
}