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3 D AutoCAD

3 D AutoCAD. 30 August 2010. Objective. Differences between 3D and 2D. Some Frequently used 3D Terms. Model 3D objects made in AutoCAD called models 2D work referred to as drawing/drafting. Some Frequently used 3D Terms. Wireframe Model Object by i ts edges only

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3 D AutoCAD

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  1. 3 D AutoCAD 30 August 2010

  2. Objective

  3. Differences between 3D and 2D

  4. Some Frequently used 3D Terms Model • 3D objects made in AutoCAD called models • 2D work referred to as drawing/drafting

  5. Some Frequently used 3D Terms Wireframe Model • Object by its edges only • Wireframe cannot hide object that are behind them • Hole has no meaning in a wireframe model because there is nothing in which to make a hole

  6. Some Frequently used 3D Terms Surface Model • Surface model; solid + empty shell • Surface model often use wireframe models as a frame for their surfaces • Surface model; part wireframe + part surface

  7. Some Frequently used 3D Terms Solid Model • Wireframe, surface model & computer-calculated mass; eg: volume, centre of gravity, mass moment of inertia • Solid models look like wireframe unless a hidden line removal command is in effect

  8. Some Frequently used 3D Terms Rendering • Shaded, realistic-looking picture of a surface solid model is called a rendering • Gray scale rendering • Fully capable of colour rendering

  9. Reasons For Using 3D • Closer to representing real object than a 2D • Show design more clearly • Good for verifying design as well as for use in presentation and documentation as well.

  10. 3D Capabilities of AutoCAD • AutoCAD has complete 3D coordinate system for specifying points and drawing objects anywhere in space • To assist in point input and for working in local area, AutoCAD has a movable user coordinate system • It can set viewpoints from any location in space that can look in any directions

  11. 3D Capabilities of AutoCAD • The computer screen can be divided into multiple viewports for simultaneously viewing 3D space from different viewpoints and different direction • AutoCAD has a good assortment of surface entities for making surface models that have a variety of shapes

  12. 3D Capabilities of AutoCAD • Solid models of most objects typically manufactured in machine shop can be made within AutoCAD • 3D models can be transformed into standard multi-view, dimensioned production drawing • AutoCAD has a built-in renderer with lights and surface materials, capable of making realistic-looking shaded picture from 3D models

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