/// <summary>
/// Verifies a PolylineCurve is a rectangle
/// </summary>
public static bool IsRectangle(PolylineCurve curve)
{
// Curve should be a valid, closed, planar polyline curve with 5 points
if (curve == null || !curve.IsValid || !curve.IsClosed || !curve.IsPlanar() || curve.PointCount != 5)
return false;
// Angle between each segment should be 90 degrees
const double angle = 90.0 * (Math.PI / 180.0);
for (var i = 1; i < curve.PointCount - 1; i++)
{
var p0 = curve.Point(i - 1);
var p1 = curve.Point(i);
var p2 = curve.Point(i + 1);
var v0 = p1 - p0;
v0.Unitize();
var v1 = p1 - p2;
v1.Unitize();
var a = Vector3d.VectorAngle(v0, v1);
if (Math.Abs(angle - a) >= RhinoMath.DefaultAngleTolerance)
return false;
}
return true;
}
/// <summary>
/// Creates grips
/// </summary>
public bool CreateGrips(PolylineCurve polylineCurve)
{
if (!SampleCsRectangleHelper.IsRectangle(polylineCurve))
return false;
if (GripCount > 0)
return false;
Plane plane;
if (!polylineCurve.TryGetPlane(out plane))
return false;
m_plane = plane;
m_active_rectangle = new Point3d[5];
for (var i = 0; i < polylineCurve.PointCount; i++)
m_active_rectangle[i] = polylineCurve.Point(i);
m_original_rectangle = new Point3d[5];
Array.Copy(m_active_rectangle, m_original_rectangle, 5);
var line = new Line();
for (var i = 0; i < 4; i++)
{
var gi = 2 * i;
line.From = m_active_rectangle[i];
line.To = m_active_rectangle[i + 1];
m_sample_cs_rectangle_grips[gi].OriginalLocation = line.From;
m_sample_cs_rectangle_grips[gi + 1].OriginalLocation = 0.5 * line.From + 0.5 * line.To;
m_sample_cs_rectangle_grips[gi].Active = true;
m_sample_cs_rectangle_grips[gi + 1].Active = true;
}
for (var i = 0; i < 8; i++)
AddGrip(m_sample_cs_rectangle_grips[i]);
return true;
}
public List<Curve> DuplicateSegments(PolylineCurve plinecurve)
{
List<Curve> lines = new List<Curve>(); ;
for (int i = 1; i < plinecurve.PointCount; i++)
{
Point3d PtA = plinecurve.Point(i - 1);
Point3d PtB = plinecurve.Point(i);
lines.Add(new LineCurve(PtA, PtB));
}
return lines;
}