presentation on solid manipulation in computer aided design
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Solid manipulation involves evaluating and modifying 3D solids. It includes displaying solids as wireframes or shaded images, evaluating points and intersections on solids, trimming solids using boundary surfaces, splitting solids into sub-solids through segmentation, applying transformations like translation and rotation, and editing solids by changing their geometry or topology using their CSG trees. The document then describes each of these solid manipulation techniques in more detail.
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presentation on solid manipulation in computer aided design
- 1. GANDHINAGAR INSTITUTE OF TECHNOLOGY COMPUTER AIDED DESIGN ACTIVE LEARNING ASSIGNMENT SOLID MANIPULATION PREPARED BY VADI RAKSHIT D (150123119055) MECHANICAL 6 D3
- 3. Solid manipulation involves manipulation both geometry and topology to make resulting solid valid. The manipulations on solid are shown below : 2/28/2017CAD/ALA/6D33 1. Displaying. 2. Evaluation of points, curves and surface on solids. 3. Trimming and intersection. 4. Segmentation. 5. Transformation. 6. Editing.
- 4. Displaying: 2/28/2017CAD/ALA/6D34 Solid model can be displayed in two forms : wire frame display and shaded image display. The wire frame display is used to produce line drawings of solid models. It uses the boundary representation data of solid model. The shaded image display of solid model uses constructive solid geometry of models. It provides realistic image of solids.
- 6. Evaluation of points, curves and surfaces: 2/28/2017CAD/ALA/6D36 Evaluation of points, curves and surface on solid can be done by considering intersection problems. The intersection of plane and solid gives cross- section of solid model. The intersection of curves and solid generates points and intersection of surface and solid generates curves. The surfaces on the solid model can be bounded by the edges of the solid.
- 7. Trimming and Intersection: 2/28/2017CAD/ALA/6D37 Trimming of solid model can be done by intersecting the solid models with trimming boundaries . The trimming boundaries are the surfaces which divides solid into two sub-solids. The solid outside or inside the boundary can be trimmed.
- 8. Segmentation: 2/28/2017CAD/ALA/6D38 Segmentation means splitting the solid into 2 or 4 sub- solids. The resulting sub solids will have its own geometry and topology.
- 9. Transformation: 2/28/2017CAD/ALA/6D39 Transformation can be done either on the primitives or on the final solid model. Transformation may be translation, rotation or scaling.
- 10. Editing: 2/28/2017CAD/ALA/6D310 Editing is used to change the geometry or topology of the solid model. The CSG tree is used to edit solid efficiently.