private void btnConstructCircle_Click(object sender, EventArgs e)
{
if (gfactory == null)
gfactory = new GeometryFactory();
// 圆心
point = gfactory.CreateGeometry(gviGeometryType.gviGeometryPoint, gviVertexAttribute.gviVertexAttributeZ) as IPoint;
point.X = 5; point.Y = 6; point.Z = 7;
// 半径
double dRadius = 10.0;
// 垂直于圆所在平面的单位法向量，用于确定圆在三维空间的位置
// 如果只有圆心和半径那么在三维空间内有无数的这样的圆组成一个球
IVector3 vNormal = new Vector3();
vNormal.Set(0, 0, 1);
circle = gfactory.CreateGeometry(gviGeometryType.gviGeometryCircle, gviVertexAttribute.gviVertexAttributeZ) as ICircle;
circle.ConstructCenterAndRadius(point, dRadius, vNormal);
if (circle == null)
return;
Circle geo = new Circle();
// Geometry属性
geo.Dimension = circle.Dimension;
if (circle.Envelope != null)
{
geo.MaxX = circle.Envelope.MaxX;
geo.MaxY = circle.Envelope.MaxY;
geo.MaxZ = circle.Envelope.MaxZ;
geo.MinX = circle.Envelope.MinX;
geo.MinY = circle.Envelope.MinY;
geo.MinZ = circle.Envelope.MinZ;
}
geo.GeometryType = circle.GeometryType;
geo.IsEmpty = circle.IsEmpty;
geo.IsValid = circle.IsValid;
geo.VertexAttribute = circle.VertexAttribute;
geo.HasId = circle.HasId();
geo.HasM = circle.HasM();
geo.HasZ = circle.HasZ();
// Curve属性
geo.IsClosed = circle.IsClosed;
geo.Length = circle.Length;
if (circle.StartPoint != null)
{
geo.StartPointX = circle.StartPoint.X;
geo.StartPointY = circle.StartPoint.Y;
geo.StartPointZ = circle.StartPoint.Z;
}
if (circle.EndPoint != null)
{
geo.EndPointX = circle.EndPoint.X;
geo.EndPointY = circle.EndPoint.Y;
geo.EndPointZ = circle.EndPoint.Z;
}
// Circle属性
if (circle.CenterPoint != null)
{
geo.CenterPointX = circle.CenterPoint.X;
geo.CenterPointY = circle.CenterPoint.Y;
geo.CenterPointZ = circle.CenterPoint.Z;
}
geo.Radius = circle.Radius;
if (circle.Normal != null)
{
geo.NormalX = circle.Normal.X;
geo.NormalY = circle.Normal.Y;
geo.NormalZ = circle.Normal.Z;
}
this.propertyGrid1.SelectedObject = geo;
}
