///<summary> This gets called when when the user runs this command.</summary>
public override IRhinoCommand.result RunCommand(IRhinoCommandContext context)
{
// Select a curve object
MRhinoGetObject go = new MRhinoGetObject();
go.SetCommandPrompt("Select curve");
go.SetGeometryFilter(IRhinoGetObject.GEOMETRY_TYPE_FILTER.curve_object);
go.GetObjects(1, 1);
if (go.CommandResult() != IRhinoCommand.result.success)
{
return(go.CommandResult());
}
// Validate the selection
IRhinoObject obj = go.Object(0).Object();
if (null == obj)
{
return(IRhinoCommand.result.failure);
}
// Get the active view
MRhinoView view = RhUtil.RhinoApp().ActiveView();
if (null == view)
{
return(IRhinoCommand.result.failure);
}
// Get the construction plane from the active view
OnPlane plane = new OnPlane(view.ActiveViewport().ConstructionPlane().m_plane);
// Create a construction plane aligned bounding box
OnBoundingBox bbox = new OnBoundingBox();
IRhinoObject[] objs = new IRhinoObject[1] {
obj
};
bool rc = RhUtil.RhinoGetTightBoundingBox(objs, ref bbox, false, plane);
if (rc == false)
{
return(IRhinoCommand.result.failure);
}
// Validate bounding box
if (0 != bbox.IsDegenerate())
{
RhUtil.RhinoApp().Print("Curve's tight bounding box is degenerate.\n");
return(IRhinoCommand.result.nothing);
}
// ON_BrepBox wants 8 points defining the box corners
// arranged in this order:
//
// v7______________v6
// |\ |\
// | \ | \
// | \ _____________\
// | v4 | v5
// | | | |
// | | | |
// v3---|---------v2 |
// \ | \ |
// \ | \ |
// \ | \ |
// \v0____________\v1
//
On3dPoint[] box_corners = new On3dPoint[8];
box_corners[0] = bbox.Corner(0, 0, 0);
box_corners[1] = bbox.Corner(1, 0, 0);
box_corners[2] = bbox.Corner(1, 1, 0);
box_corners[3] = bbox.Corner(0, 1, 0);
box_corners[4] = bbox.Corner(0, 0, 1);
box_corners[5] = bbox.Corner(1, 0, 1);
box_corners[6] = bbox.Corner(1, 1, 1);
box_corners[7] = bbox.Corner(0, 1, 1);
// Transform points to the world-xy plane
OnXform p2w = new OnXform();
p2w.ChangeBasis(plane, OnUtil.On_xy_plane);
for (int i = 0; i < 8; i++)
{
box_corners[i].Transform(p2w);
}
// Make a brep box
OnBrep brep = OnUtil.ON_BrepBox(box_corners);
if (null != brep)
{
context.m_doc.AddBrepObject(brep);
context.m_doc.Redraw();
}
return(IRhinoCommand.result.success);
}
/// <summary>
/// The one and only MakeBox
/// </summary>
static OnBrep MakeBox()
{
/*
* This example demonstrates how to construct a OnBrep
* with the topology shown below.
*
* v7_______e6_____v6
|\ |\
| e7 | e5
| \ ______e4_____\
| e11 v4 | v5
| | e10 |
| | | |
| v3---|---e2----v2 e9
\ e8 \ |
\ e3 | e1 |
\ | \ |
\ \v0_____e0_____\v1
\
*/
On3dPoint[] points = new On3dPoint[8];
points[0] = new On3dPoint(0.0, 0.0, 0.0);
points[1] = new On3dPoint(10.0, 0.0, 0.0);
points[2] = new On3dPoint(10.0, 10.0, 0.0);
points[3] = new On3dPoint(0.0, 10.0, 0.0);
points[4] = new On3dPoint(0.0, 0.0, 10.0);
points[5] = new On3dPoint(10.0, 0.0, 10.0);
points[6] = new On3dPoint(10.0, 10.0, 10.0);
points[7] = new On3dPoint(0.0, 10.0, 10.0);
OnBrep brep = new OnBrep();
int vi = 0, ei = 0, fi = 0, si = 0, c2i = 0;
for (vi = 0; vi < 8; vi++)
{
brep.NewVertex(points[vi], 0.0);
}
for (ei = 0; ei < 4; ei++)
{
OnBrepVertex v0 = brep.m_V[ei];
OnBrepVertex v1 = brep.m_V[(ei + 1) % 4];
brep.m_C3.Append(new OnLineCurve(v0.point, v1.point));
brep.NewEdge(ref v0, ref v1, ei, null, 0.0);
}
for (ei = 4; ei < 8; ei++)
{
OnBrepVertex v0 = brep.m_V[ei];
OnBrepVertex v1 = brep.m_V[ei == 7 ? 4 : (ei + 1)];
brep.m_C3.Append(new OnLineCurve(v0.point, v1.point));
brep.NewEdge(ref v0, ref v1, ei, null, 0.0);
}
for (ei = 8; ei < 12; ei++)
{
OnBrepVertex v0 = brep.m_V[ei - 8];
OnBrepVertex v1 = brep.m_V[ei - 4];
brep.m_C3.Append(new OnLineCurve(v0.point, v1.point));
brep.NewEdge(ref v0, ref v1, ei, null, 0.0);
}
OnBrepBoxFaceInfo[] f = new OnBrepBoxFaceInfo[6];
f[0] = new OnBrepBoxFaceInfo(0, 9, 4, 8, false, false, true, true);
f[1] = new OnBrepBoxFaceInfo(1, 10, 5, 9, false, false, true, true);
f[2] = new OnBrepBoxFaceInfo(2, 11, 6, 10, false, false, true, true);
f[3] = new OnBrepBoxFaceInfo(3, 8, 7, 11, false, false, true, true);
f[4] = new OnBrepBoxFaceInfo(3, 2, 1, 0, true, true, true, true);
f[5] = new OnBrepBoxFaceInfo(4, 5, 6, 7, false, false, false, false);
for (fi = 0; fi < 6; fi++)
{
OnBrepEdge e0 = brep.m_E[f[fi].e[0]];
OnBrepEdge e1 = brep.m_E[f[fi].e[1]];
OnBrepEdge e2 = brep.m_E[f[fi].e[2]];
OnBrepEdge e3 = brep.m_E[f[fi].e[3]];
OnBrepVertex v0 = brep.m_V[e0.get_m_vi(f[fi].bRev[0] ? 1 : 0)];
OnBrepVertex v1 = brep.m_V[e1.get_m_vi(f[fi].bRev[1] ? 1 : 0)];
OnBrepVertex v2 = brep.m_V[e2.get_m_vi(f[fi].bRev[2] ? 1 : 0)];
OnBrepVertex v3 = brep.m_V[e3.get_m_vi(f[fi].bRev[3] ? 1 : 0)];
si = brep.AddSurface(OnUtil.ON_NurbsSurfaceQuadrilateral(v0.point, v1.point, v2.point, v3.point));
OnInterval s = brep.m_S[si].Domain(0);
OnInterval t = brep.m_S[si].Domain(1);
On2dPoint p0 = new On2dPoint(s[0], t[0]);
On2dPoint p1 = new On2dPoint(s[1], t[0]);
On2dPoint p2 = new On2dPoint(s[1], t[1]);
On2dPoint p3 = new On2dPoint(s[0], t[1]);
OnBrepFace face = brep.NewFace(si);
OnBrepLoop loop = brep.NewLoop(IOnBrepLoop.TYPE.outer, ref face);
loop.m_pbox.m_min.x = s[0];
loop.m_pbox.m_min.y = t[0];
loop.m_pbox.m_min.z = 0.0;
loop.m_pbox.m_max.x = s[1];
loop.m_pbox.m_max.y = t[1];
loop.m_pbox.m_max.z = 0.0;
// south side of surface
c2i = brep.AddTrimCurve(new OnLineCurve(p0, p1));
OnBrepTrim trim0 = brep.NewTrim(ref e0, f[fi].bRev[0], ref loop, c2i);
trim0.set_m_tolerance(0, 0.0);
trim0.set_m_tolerance(1, 0.0);
trim0.m_type = (trim0.get_m_vi(0) != trim0.get_m_vi(1)) ? IOnBrepTrim.TYPE.mated : IOnBrepTrim.TYPE.singular;
trim0.m_iso = IOnSurface.ISO.S_iso;
// east side of surface
c2i = brep.AddTrimCurve(new OnLineCurve(p1, p2));
OnBrepTrim trim1 = brep.NewTrim(ref e1, f[fi].bRev[1], ref loop, c2i);
trim1.set_m_tolerance(0, 0.0);
trim1.set_m_tolerance(1, 0.0);
trim1.m_type = (trim1.get_m_vi(0) != trim1.get_m_vi(1)) ? IOnBrepTrim.TYPE.mated : IOnBrepTrim.TYPE.singular;
trim1.m_iso = IOnSurface.ISO.E_iso;
// north side of surface
c2i = brep.AddTrimCurve(new OnLineCurve(p2, p3));
OnBrepTrim trim2 = brep.NewTrim(ref e2, f[fi].bRev[2], ref loop, c2i);
trim2.set_m_tolerance(0, 0.0);
trim2.set_m_tolerance(1, 0.0);
trim2.m_type = (trim2.get_m_vi(0) != trim2.get_m_vi(1)) ? IOnBrepTrim.TYPE.mated : IOnBrepTrim.TYPE.singular;
trim2.m_iso = IOnSurface.ISO.N_iso;
// west side of surface
c2i = brep.AddTrimCurve(new OnLineCurve(p3, p0));
OnBrepTrim trim3 = brep.NewTrim(ref e3, f[fi].bRev[3], ref loop, c2i);
trim3.set_m_tolerance(0, 0.0);
trim3.set_m_tolerance(1, 0.0);
trim3.m_type = (trim3.get_m_vi(0) != trim3.get_m_vi(1)) ? IOnBrepTrim.TYPE.mated : IOnBrepTrim.TYPE.singular;
trim3.m_iso = IOnSurface.ISO.W_iso;
}
if (!brep.IsValid())
{
return(null);
}
return(brep);
}
