What event deals with point entering closed curve and solid brep?

ivelin.peychev · May 9, 2019, 4:14pm

I could not find anything in the api.

ivelin.peychev · May 10, 2019, 10:09am

nathanletwory · May 10, 2019, 11:36am

Not sure what you mean by event for entering closed curve or closed surface. Are you really looking for motion of geometry?

Or do you just want to know how to know if a point is in the area of a closed (planar) curve or a closed surface.

(i.e. Grasshopper components Point In Curve and Point In Brep)

edit: Point In Curve:

https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_Curve_Contains.htm

Point in Brep

https://developer.rhino3d.com/api/RhinoCommon/html/M_Rhino_Geometry_Brep_IsPointInside.htm

ivelin.peychev · May 10, 2019, 11:54am

Think of it as a live collision detection.
While you’re working on some object, say a surface you want that the points from that surface to not exit specific boundaries. If it does then a message should be displayed.

I know I can use Grasshopper but I do not want to.
I want it to be an event solely inside Rhino.
I also don’t want to use Node in code. I do not want to load grasshopper and all its plugins’ assemblies every time.

Another case is if you have an object expanding (scaling) based on some dynamic rules. And you want to trigger an event when this object collides with another, say trigger the other object to be shrunk or moved.

nathanletwory · May 10, 2019, 12:10pm

There are no events for that, you’ll have to code up your own detection and handling using the two functions I just linked to. You’ll do that in some transform handler or so

Some example code to look at

github.com

mcneel/rhino-developer-samples/blob/53f7108408fd4905e48bda566d15bd87458c7369/rhinocommon/cs/SampleCsCommands/SampleCsRotate.cs

using System;
using Rhino;
using Rhino.ApplicationSettings;
using Rhino.Collections;
using Rhino.Commands;
using Rhino.Display;
using Rhino.Geometry;
using Rhino.Input;
using Rhino.Input.Custom;

namespace SampleCsCommands
{
  #region GetReferencePoint class

  /// <summary>
  /// GetReferencePoint class
  /// </summary>
  internal class GetReferencePoint : GetPoint
  {
    private readonly Point3d m_base_point;

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github.com

mcneel/rhino-developer-samples/blob/53f7108408fd4905e48bda566d15bd87458c7369/rhinocommon/cs/SampleCsCommands/SampleCsOrientOnMesh.cs

using System.Collections.Generic;
using Rhino;
using Rhino.Commands;
using Rhino.Display;
using Rhino.DocObjects;
using Rhino.Geometry;
using Rhino.Input.Custom;

namespace SampleCsCommands
{
  public class SampleCsOrientOnMesh : Command
  {
    /// <summary>
    /// The command name
    /// </summary>
    public override string EnglishName
    {
      get { return "SampleCsOrientOnMesh"; }
    }

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(more here)

FWIW, Grasshopper is inside Rhino, so you are staying in Rhino…

ivelin.peychev · May 10, 2019, 12:15pm

Thanks for the links Nathan,

I meant not loading additional stuff. Everytime I use node-in-code GH loads upon the initial launch. I want to avoid this. GH about screen to popup, I don’t like this.

I logged this here as a wish RH-52534