| public SplitEdge ( LibTessDotNet.MeshUtils.Edge eOrg ) : LibTessDotNet.MeshUtils.Edge | ||
| eOrg | LibTessDotNet.MeshUtils.Edge | |
| Результат | LibTessDotNet.MeshUtils.Edge | |
public void AddContour(ContourVertex[] vertices, int count, ContourOrientation forceOrientation)
{
if (_mesh == null)
{
_mesh = new Mesh();
}
bool reverse = false;
if (forceOrientation != ContourOrientation.Original)
{
float area = SignedArea(vertices, count);
reverse = (forceOrientation == ContourOrientation.Clockwise && area < 0.0f) || (forceOrientation == ContourOrientation.CounterClockwise && area > 0.0f);
}
MeshUtils.Edge e = null;
for (int i = 0; i < count; ++i)
{
if (e == null)
{
e = _mesh.MakeEdge();
_mesh.Splice(e, e._Sym);
}
else
{
// Create a new vertex and edge which immediately follow e
// in the ordering around the left face.
_mesh.SplitEdge(e);
e = e._Lnext;
}
int index = reverse ? count - 1 - i : i;
// The new vertex is now e._Org.
e._Org._coords = vertices[index].Position;
e._Org._data = vertices[index].Data;
// The winding of an edge says how the winding number changes as we
// cross from the edge's right face to its left face. We add the
// vertices in such an order that a CCW contour will add +1 to
// the winding number of the region inside the contour.
e._winding = 1;
e._Sym._winding = -1;
}
}
private void AddContourInternal(IList <ContourVertex> vertices, ContourOrientation forceOrientation)
{
if (_mesh == null)
{
_mesh = _pool.Get <Mesh>();
}
bool reverse = false;
if (forceOrientation != ContourOrientation.Original)
{
var area = SignedArea(vertices);
reverse = (forceOrientation == ContourOrientation.Clockwise && area < new DeterministicFloat(0)) || (forceOrientation == ContourOrientation.CounterClockwise && area > new DeterministicFloat(0));
}
MeshUtils.Edge e = null;
for (int i = 0; i < vertices.Count; ++i)
{
if (e == null)
{
e = _mesh.MakeEdge(_pool);
_mesh.Splice(_pool, e, e._Sym);
}
else
{
// Create a new vertex and edge which immediately follow e
// in the ordering around the left face.
_mesh.SplitEdge(_pool, e);
e = e._Lnext;
}
int index = reverse ? vertices.Count - 1 - i : i;
// The new vertex is now e._Org.
e._Org._coords = vertices[index].Position;
e._Org._data = vertices[index].Data;
// The winding of an edge says how the winding number changes as we
// cross from the edge's right face to its left face. We add the
// vertices in such an order that a CCW contour will add +1 to
// the winding number of the region inside the contour.
e._winding = 1;
e._Sym._winding = -1;
}
}
private bool CheckForRightSplice(ActiveRegion regUp)
{
ActiveRegion activeRegion = RegionBelow(regUp);
MeshUtils.Edge eUp = regUp._eUp;
MeshUtils.Edge eUp2 = activeRegion._eUp;
if (Geom.VertLeq(eUp._Org, eUp2._Org))
{
if (Geom.EdgeSign(eUp2._Dst, eUp._Org, eUp2._Org) > 0f)
{
return(false);
}
if (!Geom.VertEq(eUp._Org, eUp2._Org))
{
_mesh.SplitEdge(eUp2._Sym);
_mesh.Splice(eUp, eUp2._Oprev);
regUp._dirty = (activeRegion._dirty = true);
}
else if (eUp._Org != eUp2._Org)
{
_pq.Remove(eUp._Org._pqHandle);
SpliceMergeVertices(eUp2._Oprev, eUp);
}
}
else
{
if (Geom.EdgeSign(eUp._Dst, eUp2._Org, eUp._Org) < 0f)
{
return(false);
}
RegionAbove(regUp)._dirty = (regUp._dirty = true);
_mesh.SplitEdge(eUp._Sym);
_mesh.Splice(eUp2._Oprev, eUp);
}
return(true);
}
