1. Contextual connections in shape model
Laboratory 10.
Contextual connections in shape model
László Horváth
university professor

2. László Horváth ÓU-IAM http://users.nik.uni-obuda.hu/lhorvath/
Contents
Case study
CS 10.1 Contextual features in shape model.
László Horváth ÓU-IAM

3. Case study CS10.1: Contextual features in shape model.
Plane.1 is defined in the context of yz plane
László Horváth ÓU-IAM

4. Case study CS10.1: Contextual features in shape model.
Length.1 model level parameter is defined.
Plane.1 offset value is placed in the context of Lenght.1 using formula.
László Horváth ÓU-IAM

5. Case study CS10.1: Contextual features in shape model.
The formula context replaces the direct definition of offset parameter value.
László Horváth ÓU-IAM

6. Case study CS10.1: Contextual features in shape model.
Adaptive filtering
Spline.1 closed curve is defined in the context of five points. The contextual connection is interpolation. Sketch.1 is defined in the context of this geometry and local coordinate system.
László Horváth ÓU-IAM

7. Case study CS10.1: Contextual features in shape model.
Form feature rib (Rib.1) is defined in the context of two curves. The generation rule is sweeping a closed curve along another closed curve. Form feature and its boundary representation are generated.
László Horváth ÓU-IAM

8. Case study CS10.1: Contextual features in shape model.
Surface in boundary representation of form feature Rib.1 is extracted as (green) contextual entity.
László Horváth ÓU-IAM

9. Case study CS10.1: Contextual features in shape model.
Extracted surface is transformed. The context is translation.
László Horváth ÓU-IAM

10. Case study CS10.1: Contextual features in shape model.
The value of translation distance parameter is placed in the context of Lenght.1 using formula.
László Horváth ÓU-IAM

11. Case study CS10.1: Contextual features in shape model.
László Horváth ÓU-IAM

12. Case study CS10.1: Contextual features in shape model.
Solid form feature (ThickSurface.1) is defined between the translated surface (Translate.1) and its offset.
László Horváth ÓU-IAM

13. Case study CS10.1: Contextual features in shape model.
Tabulated solid (Pad.1) form feature is defined in the context of a planar closed curve and boundary of the two existing solid (slide 1).
László Horváth ÓU-IAM

14. Case study CS10.1: Contextual features in shape model.
Tabulated solid (Pad.1) is defined in the context of a planar closed curve and boundary of the two existing solid (slide 2).
László Horváth ÓU-IAM

15. Case study CS10.1: Contextual features in shape model.
Tabulated solid (Pad.1) is defined in the context of a planar closed curve and boundary of the two existing solid (slide 3).
László Horváth ÓU-IAM

16. Case study CS10.1: Contextual features in shape model.
Hole is defined in the context of stating point on the boundary of the actual solid and limiting topological face. The procedure limits the hole by the surface which is mapped to the last topological face in the actual direction.
László Horváth ÓU-IAM

17. Case study CS10.1: Contextual features in shape model.
Open curve is defined in the context of four points. The contextual connection is interpolation. Sketch.5 is defined in the context of this geometry. All geometry is non-uniform rational B-spline (NURBS)
László Horváth ÓU-IAM

18. Case study CS10.1: Contextual features in shape model.
Tabulated surface (Extrude.1) is defined in the context of Sketch.5 and direction vector.
László Horváth ÓU-IAM

19. Case study CS10.1: Contextual features in shape model.
Actual solid is result of shape modification sequence by form features. Because last modification of solid was by Extrude.1, split is done in the context of Extrude.1. Other context is a vector which defines the direction of the remaining solid which is completed by surfaces inherited from Extrude.1 and includes the related topology.
László Horváth ÓU-IAM

20. Case study CS10.1: Contextual features in shape model.
Value of Length.1 was increased. This resulted new situation in which computation of surfaces in boundary became impossible. Diagnosis summarized this situation. Generation of the shape is not allowed.
László Horváth ÓU-IAM

21. Case study CS10.1: Contextual features in shape model.
Increasing limit values at the definition of Extrude.1 perhaps makes splitting operation possible. Appropriate completion of contexts would be advised to avoid similar situations.
László Horváth ÓU-IAM

22. Case study CS10.1: Contextual features in shape model.
Topological operators can not receive valued surface contexts in the boundary of solid.
László Horváth ÓU-IAM

23. Case study CS10.1: Contextual features in shape model.
Value of Length.1 should be decrease. Specification of value range would be advised to consider.
László Horváth ÓU-IAM

24. Case study CS10.1: Contextual features in shape model.
Offset surface is defined in the context of surface generated at splitting of solid .
László Horváth ÓU-IAM

25. Case study CS10.1: Contextual features in shape model.
New solid form feature (ThickSurface.2) is defined between the new offset surface (Offset.1) and its offset. The modified topology consists of two lumps.
László Horváth ÓU-IAM

26. Case study CS10.1: Contextual features in shape model.
One direction rectangular pattern (RectPattern.1) form feature is defined in the context of ThickSurface.2 and a reference element for the direction. The modified topology consists of seven lumps.
László Horváth ÓU-IAM

27. Case study CS10.1: Contextual features in shape model.
Parameters of the rectangular pattern in the list of model object parameters.
László Horváth ÓU-IAM

28. Case study CS10.1: Contextual features in shape model.
Spacing (Spacing.1) parameter of the rectangular pattern is placed in the context of Length.1.
László Horváth ÓU-IAM

29. Case study CS10.1: Contextual features in shape model.
Selected material in the model. Material definition brings complex information into the model among properties.
László Horváth ÓU-IAM

30. Case study CS10.1: Contextual features in shape model.
Material parameters in the model for the rendering and the analysis aspects in the properties.
László Horváth ÓU-IAM

31. Case study CS10.1: Contextual features in shape model.
Material parameters in the parameter list of model.
László Horváth ÓU-IAM

32. Case study CS10.1: Contextual features in shape model.
Part object in its physical environment with contextual light source representation. Shading effect light source parameter value is inactive then active.
This is contextual visualization model in model space. Its purpose is analysis and not only realistic picture generation.
László Horváth ÓU-IAM

33. Case study CS10.1: Contextual features in shape model.
Parameters of light source Light.1 in the list of parameters in model.
László Horváth ÓU-IAM

34. Case study CS10.1: Contextual features in shape model.
Visualization of a selected form feature.
László Horváth ÓU-IAM

35. Case study CS10.1: Contextual features in shape model.
Any dimension between any geometrical entities can be measured on the boundary representation and placed in model as parameter. Boundary representation includes consistent topology and geometry.
László Horváth ÓU-IAM