public static double AroundLength(CadFigure fig)
{
if (fig == null)
{
return(0);
}
int cnt = fig.PointCount;
if (cnt < 2)
{
return(0);
}
CadVertex p0;
CadVertex p1;
CadVertex pd;
double d = 0;
for (int i = 0; i < cnt - 1; i++)
{
p0 = fig.GetPointAt(i);
p1 = fig.GetPointAt(i + 1);
pd = p1 - p0;
d += pd.Norm();
}
return(d);
}
// 三角形の重心を求める
public static Vector3d TriangleCentroid(CadFigure fig)
{
return(CadMath.TriangleCentroid(
fig.GetPointAt(0).vector,
fig.GetPointAt(1).vector,
fig.GetPointAt(2).vector
));
}
// 三角形の面積 3D対応
public static double TriangleArea(CadFigure fig)
{
return(CadMath.TriangleArea(
fig.GetPointAt(0).vector,
fig.GetPointAt(1).vector,
fig.GetPointAt(2).vector
));
}
public override void Undo(CadObjectDB db)
{
CadLayer layer = db.GetLayer(LayerID);
CadFigure fig = db.GetFigure(FigureID);
if (fig == null)
{
return;
}
int idx = PointIndex;
int i = 0;
if (mPointList == null)
{
mPointList = new VertexList();
}
mPointList.Clear();
for (; i < InsertNum; i++)
{
mPointList.Add(fig.GetPointAt(idx + i));
}
fig.RemovePointsRange(idx, InsertNum);
}
public static int InsertBezierHandle(CadFigure fig, int idx1, int idx2)
{
CadVertex a = fig.GetPointAt(idx1);
CadVertex b = fig.GetPointAt(idx2);
CadVertex hp1 = b - a;
hp1 = hp1 / 3;
hp1 = hp1 + a;
CadVertex hp2 = a - b;
hp2 = hp2 / 3;
hp2 = hp2 + b;
hp1.IsHandle = true;
hp2.IsHandle = true;
fig.InsertPointAt(idx1 + 1, hp1);
fig.InsertPointAt(idx1 + 2, hp2);
return(2);
}
public static EditResult CutSegment(CadObjectDB db, MarkSegment seg, Vector3d p)
{
EditResult result = new EditResult();
if (seg.Figure.Type != CadFigure.Types.POLY_LINES)
{
return(result);
}
CrossInfo ci = CadMath.PerpendicularCrossSeg(seg.pA.vector, seg.pB.vector, p);
if (!ci.IsCross)
{
return(result);
}
CadFigure org = db.GetFigure(seg.FigureID);
int a = Math.Min(seg.PtIndexA, seg.PtIndexB);
int b = Math.Max(seg.PtIndexA, seg.PtIndexB);
CadFigure fa = db.NewFigure(CadFigure.Types.POLY_LINES);
CadFigure fb = db.NewFigure(CadFigure.Types.POLY_LINES);
fa.AddPoints(org.PointList, 0, a + 1);
fa.AddPoint(new CadVertex(ci.CrossPoint));
fb.AddPoint(new CadVertex(ci.CrossPoint));
fb.AddPoints(org.PointList, b);
if (org.IsLoop)
{
fb.AddPoint(fa.GetPointAt(0));
}
result.AddList.Add(new EditResult.Item(seg.LayerID, fa));
result.AddList.Add(new EditResult.Item(seg.LayerID, fb));
result.RemoveList.Add(new EditResult.Item(org.LayerID, org));
return(result);
}