Class MeshInsertProjectedPolygon

Inserts a polygon into a mesh using a planar projection. You provide a projection frame and either the polygon in the frame's XY-coordinate system, or a DCurve3 space curve that will be projected.

Currently you must also provide a seed triangle, that intersects the curve. We flood-fill from the vertices of that triangle to find the interior vertices, and hence the set of faces that are modified.

The insertion operation splits the existing mesh edges, so the inserted polygon will have more segments than the input polygon, in general. If you set SimplifyInsertion = true, then we collapse these extra edges, so you (should) get back an edge loop with the same number of vertices. However, on a non-planar mesh this means the edges will no longer lie on the input surface.

If RemovePolygonInterior = true, the faces inside the polygon are deleted

returns: ModifiedRegion: this is the RegionOperator created to subset the mesh for editing. You can use this to access the modified mesh

InsertedPolygonVerts: the output vertex ID for Polygon[i]. This does not include the intermediate vertices, it's a 1-1 correspondence.

InsertedLoop: inserted edge loop on output mesh

InteriorTriangles: the triangles inside the polygon, null if RemovePolygonInterior=true

If you would like to change the behavior after the insertion is computed, you can subclass and override BackPropagate().

[TODO] currently we construct a planar BVTree (but 3D) to map the new vertices to 3D via barycentric interpolation. However we could do this inline. MeshInsertUVPolyCurve needs to fully support working on separate coordinate set (it tries via Get/Set PointF, but it is not 100% working), and it needs to let client know about poke and split events, w/ bary-coords, so that we can compute the new 3D positions.

Inheritance
Object
MeshInsertProjectedPolygon
Inherited Members
Namespace: gs
Assembly: cs.temp.dll.dll
Syntax
public class MeshInsertProjectedPolygon

Constructors

MeshInsertProjectedPolygon(DMesh3, DCurve3, Frame3f, Int32)

create Polygon by projecting polygon3 into frame

Declaration
public MeshInsertProjectedPolygon(DMesh3 mesh, DCurve3 polygon3, Frame3f frame, int seedTri)
Parameters
Type Name Description
DMesh3 mesh
DCurve3 polygon3
Frame3f frame
Int32 seedTri

MeshInsertProjectedPolygon(DMesh3, Polygon2d, Frame3f, Int32)

insert polygon in given frame

Declaration
public MeshInsertProjectedPolygon(DMesh3 mesh, Polygon2d poly, Frame3f frame, int seedTri)
Parameters
Type Name Description
DMesh3 mesh
Polygon2d poly
Frame3f frame
Int32 seedTri

Fields

InsertedLoop

Declaration
public EdgeLoop InsertedLoop
Field Value
Type Description
EdgeLoop

InsertedPolygonVerts

Declaration
public int[] InsertedPolygonVerts
Field Value
Type Description
Int32[]

InteriorTriangles

Declaration
public int[] InteriorTriangles
Field Value
Type Description
Int32[]

Mesh

Declaration
public DMesh3 Mesh
Field Value
Type Description
DMesh3

ModifiedRegion

Declaration
public RegionOperator ModifiedRegion
Field Value
Type Description
RegionOperator

Polygon

Declaration
public Polygon2d Polygon
Field Value
Type Description
Polygon2d

ProjectFrame

Declaration
public Frame3f ProjectFrame
Field Value
Type Description
Frame3f

RemovePolygonInterior

Declaration
public bool RemovePolygonInterior
Field Value
Type Description
Boolean

SeedTriangle

Declaration
public int SeedTriangle
Field Value
Type Description
Int32

SimplifyInsertion

Declaration
public bool SimplifyInsertion
Field Value
Type Description
Boolean

Methods

BackPropagate(RegionOperator, Int32[], EdgeLoop)

Declaration
protected virtual bool BackPropagate(RegionOperator regionOp, int[] insertedPolyVerts, EdgeLoop insertedLoop)
Parameters
Type Name Description
RegionOperator regionOp
Int32[] insertedPolyVerts
EdgeLoop insertedLoop
Returns
Type Description
Boolean

Insert()

Declaration
public bool Insert()
Returns
Type Description
Boolean

Validate()

Declaration
public virtual ValidationStatus Validate()
Returns
Type Description
ValidationStatus