IntersectionProjectPointsToBreps Method

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

namespace examples_cs
{
  public class ProjectPointsToBrepsCommand : Command
  {
    public override string EnglishName { get { return "csProjectPtointsToBreps"; } }

    protected override Result RunCommand(RhinoDoc doc, RunMode mode)
    {
      var gs = new GetObject();
      gs.SetCommandPrompt("select surface");
      gs.GeometryFilter = ObjectType.Surface | ObjectType.PolysrfFilter;
      gs.DisablePreSelect();
      gs.SubObjectSelect = false;
      gs.Get();
      if (gs.CommandResult() != Result.Success)
        return gs.CommandResult();
      var brep = gs.Object(0).Brep();
      if (brep == null)
        return Result.Failure;

      var points = Intersection.ProjectPointsToBreps(
                   new List<Brep> {brep}, // brep on which to project
                   new List<Point3d> {new Point3d(0, 0, 0), new Point3d(3,0,3), new Point3d(-2,0,-2)}, // some random points to project
                   new Vector3d(0, 1, 0), // project on Y axis
                   doc.ModelAbsoluteTolerance);

      if (points != null && points.Length > 0)
      {
        foreach (var point in points)
        {
          doc.Objects.AddPoint(point);
        }
      }
      doc.Views.Redraw();
      return Result.Success;
    }
  }
}

Imports Rhino
Imports Rhino.DocObjects
Imports Rhino.Input.Custom
Imports Rhino.Commands
Imports System.Collections.Generic
Imports Rhino.Geometry
Imports Rhino.Geometry.Intersect

Namespace examples_vb
  Public Class ProjectPointsToBrepsCommand
    Inherits Command
    Public Overrides ReadOnly Property EnglishName() As String
      Get
        Return "vbProjectPtointsToBreps"
      End Get
    End Property

    Protected Overrides Function RunCommand(doc As RhinoDoc, mode As RunMode) As Result
      Dim gs = New GetObject()
      gs.SetCommandPrompt("select surface")
      gs.GeometryFilter = ObjectType.Surface Or ObjectType.PolysrfFilter
      gs.DisablePreSelect()
      gs.SubObjectSelect = False
      gs.[Get]()
      If gs.CommandResult() <> Result.Success Then
        Return gs.CommandResult()
      End If
      Dim brep = gs.[Object](0).Brep()
      If brep Is Nothing Then
        Return Result.Failure
      End If

      ' brep on which to project
      ' some random points to project
      ' project on Y axis
      Dim points = Intersection.ProjectPointsToBreps(New List(Of Brep)() From { _
        brep _
      }, New List(Of Point3d)() From { _
        New Point3d(0, 0, 0), _
        New Point3d(3, 0, 3), _
        New Point3d(-2, 0, -2) _
      }, New Vector3d(0, 1, 0), doc.ModelAbsoluteTolerance)

      If points IsNot Nothing AndAlso points.Length > 0 Then
        For Each point As Point3d In points
          doc.Objects.AddPoint(point)
        Next
      End If
      doc.Views.Redraw()
      Return Result.Success
    End Function
  End Class
End Namespace

import rhinoscriptsyntax as rs
from scriptcontext import *
from Rhino.Geometry import *

def RunCommand():
  srfid = rs.GetObject("select surface", rs.filter.surface | rs.filter.polysurface)
  if not srfid: return
  brep = rs.coercebrep(srfid)
  if not brep: return

  pts = Intersect.Intersection.ProjectPointsToBreps(
      [brep], # brep on which to project
      [Point3d(0, 0, 0), Point3d(3,0,3), Point3d(-2,0,-2)], # points to project
      Vector3d(0, 1, 0), # project on Y axis
      doc.ModelAbsoluteTolerance)

  if pts != None and pts.Length > 0:
    for pt in pts:
      doc.Objects.AddPoint(pt)

  doc.Views.Redraw()

if __name__ == "__main__":
    RunCommand()