JT Geometries mapping (Base Module)

Table of Contents

• Mesh Entities
• Topological Entities
• Surface Entities
• Curve Entities
• Point Entities
• Assembly

A JT file contains meshes, multiple Level-of-detail meshes.
It can contain also BREP in somes cases. Some JT Files does not contain BREP.
Brep can be stored as :

• JT-BREP : an internal JT BREP that contains only NURBS surfaces and NURBS Curves. Both 3D and UV trimming curves are written.
  
• XT-BREP : Parasolid body stored inside. To access this information you have to enable parasolid reader before starting Dtk_API
  
• ULP (LIBRA) form : Ultra Light Semiprecise BREP
  
  Datakit API supports all these forms.
  

Mesh Entities

JT Entity	DATAKIT Class	Remarks
Mesh triangles	Dtk_mesh
Mesh Polylines	Dtk_mesh
Mesh Points	Dtk_mesh

Topological Entities

JT Entity	DATAKIT Class	Remarks
Region	Dtk_Body
Shell	Dtk_Shell
Face	Dtk_Face
Loop	Dtk_Loop
Edge	Dtk_Edge
Coedge	Dtk_Coedge
Vertex	Dtk_Vertex

Surface Entities

JT Entity	DATAKIT Class	Remarks
Nurbs Surface	Dtk_NurbsSurface	JT contain only NURBS

Curve Entities

JT Entity	DATAKIT Class	Remarks
Nurbs Curve	Dtk_NurbsCurve	JT contain only NURBS

Point Entities

JT Entity	DATAKIT Class	Remarks
Point	Dtk_Point

Assembly

JT Entity	DATAKIT Class	Remarks
Assembly	Dtk_Component	Available for BREP and Meshs

Mesh Entities

JT Entity	DATAKIT Class	Remarks
Name	GetName into Dtk_Info
Color	ColorId into Dtk_Info
Opacity	ColorId into Dtk_Info	Alpha A() into Dtk_RGB
Layer	LayerId into Dtk_Info
Visibility	BlankStatus into Dtk_Info
Texture/Lighting	RenderInfosId into Dtk_Info	Dtk_RenderInfos

Only when a BREP is present inside the JT file. BREP is optionnal into a JT file.