public bool FindHitEdge(Ray3f sceneRay, MeshEditorOpType.BoundaryType boundaryMode, bool snap_to_center, ref Frame3f hitFrameS, ref int hitEID)
{
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);
}
var intr = MeshQueries.TriangleIntersection(PreviewMesh, hit_tri, objRay);
int e_idx = -1; double near_sqr = double.MaxValue; DistRay3Segment3 near_dist = null;
for (int j = 0; j < 3; ++j)
{
Segment3d seg = new Segment3d(intr.Triangle[j], intr.Triangle[(j + 1) % 3]);
DistRay3Segment3 dist = new DistRay3Segment3(objRay, seg);
if (dist.GetSquared() < near_sqr)
{
near_sqr = dist.GetSquared();
near_dist = dist;
e_idx = j;
}
}
int eid = PreviewMesh.GetTriEdge(hit_tri, e_idx);
if (boundaryMode != MeshEditorOpType.BoundaryType.Any)
{
bool is_boundary = PreviewMesh.IsBoundaryEdge(eid);
if ((is_boundary && boundaryMode == MeshEditorOpType.BoundaryType.OnlyInternal) ||
(is_boundary == false && boundaryMode == MeshEditorOpType.BoundaryType.OnlyBoundary))
{
return(false);
}
}
if (snap_to_center)
{
Frame3f hitFrameL = new Frame3f(PreviewMesh.GetEdgePoint(eid, 0.5), PreviewMesh.GetTriNormal(hit_tri));
hitFrameS = SceneTransforms.ObjectToScene(previewSO, hitFrameL);
}
else
{
Frame3f hitFrameL = new Frame3f(near_dist.SegmentClosest, PreviewMesh.GetTriNormal(hit_tri));
hitFrameS = SceneTransforms.ObjectToScene(previewSO, hitFrameL);
}
hitEID = eid;
return(true);
}
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);
}
