MeshTopology

Remarks

Doc 24's P2 selection table, as functions rather than as gestures. "Alt-click an edge" is a binding; what it selects is a walk over the edge table, and the walk is the part that can be wrong. Keeping it here means a loop round a cylinder is a test with a cylinder in it rather than a click somebody has to perform.

⚠ Every query answers with indices and takes none of its own state. A selection is the editor's — see MeshSelection — and these are what it is changed by. A query that mutated a selection would be one that could not be composed: grow-then-loop and loop-then-grow are both things a designer does.

⚠ The edge table is what makes all of this cheap, and it is why doc 24's D2 keeps one. A loop is a walk of one step per edge in it, and a step is two spans and a comparison. Without an explicit table each step is a search over every face in the mesh.

Fields and properties (1)

• public const float DefaultCoplanarTolerance

  How nearly parallel two faces must be to count as coplanar for a selection.

Methods (6)

• public static void EdgeLoop(EditMesh mesh, int edge, List<int> into)

  The edge loop an edge is part of.

• public static void EdgeRing(EditMesh mesh, int edge, List<int> into)

  The edge ring an edge is part of.

• public static void Coplanar(EditMesh mesh, int face, List<int> into, float tolerance = 0.9994)

  Every face reachable from one by crossing edges, while staying coplanar with it.

• public static void Group(EditMesh mesh, int group, List<int> into)

  Every face in a group.

• public static void Shell(EditMesh mesh, int face, List<int> into)

  Every face joined to one through shared edges, however the surface turns.

• public static bool BoundaryLoop(EditMesh mesh, int edge, List<int> into)

  The boundary loop an open edge is part of.

Used by (3)

• MeshOperationsVixen.Geometry
• MeshTopologyTestsVixen.Geometry.Tests
• BlockoutSelectionVixen.Editor.Blockout