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INTRODUCTON TO 3 D

FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS. INTRODUCTON TO 3 D. SOLID MODELLING VIEW, 3D ORBIT, VIEWPORTS SHADE, HIDE, WIREFRAME UCS. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS. 3 D MODELS- WHY 3D?. 3D modelling has several advantages:

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INTRODUCTON TO 3 D

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  1. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS INTRODUCTON TO 3 D SOLID MODELLING VIEW, 3D ORBIT, VIEWPORTS SHADE, HIDE, WIREFRAME UCS

  2. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS 3 D MODELS- WHY 3D? 3D modelling has several advantages: • You can view the model from any vantage point • You can generate reliable standard and auxiliary 2D views automatically • You can remove the hidden lines and do realistic shading • Export the model to create an animation • With one 3D CAD model, you can generate views from any angle either side or outside the house.

  3. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS

  4. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS TYPES OF 3D MODELLING IN AUTOCAD Three types of 3D modelling are supported in Autocad: • Wireframe, • Surface • Solid Each type of modelling has its own creation and editing techniques. There are some commands to create basic 3D solids in Autocad.

  5. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS TYPES OF 3D MODELLING IN AUTOCAD We can also create our own 3d objects by using 2d drawings. Extrude Command: “creating solids” Subtract Command: “subtracting voids from solids”:

  6. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS PROCESS OF 3D MODELLING 1 2 3 4 5 6 7 8 9

  7. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS PROCESS OF 3D MODELLING

  8. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS DISPLAYING 3D SOLIDS There is also ways of displaying 3D objects: • Wireframe • Shade • Hide • Render HIDE WIREFRAME RENDER SHADE

  9. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS 3D VIEW, 3D ORBIT, VIEWPORTS • TO CHANGE THE VIEW OF 3D OBJECT: • 3D VIEW • VIEWPORTS • 3D ORBIT • UCS • Whenever we change our viewpoint, the UCS İcon of Autocad modifies.

  10. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS 3D VIEW The location of the eye (VIEWPOINT) and the location of the 3D object generates the way object looks. • 3D VIEW options in Autocad: • Orthographic options: • Top, bottom, front, back, left, right • Isometric options are: • SW Isometric, SE Isometric, NE Isometric, NW Isometric

  11. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS VIEWPORTS

  12. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS 3D ORBIT The 3D Orbit view displays an arcball, which is a circle divided into four quadrants by smaller circles. When 3DORBIT is active, the target of the view stays stationary and the point of view moves around the target. Rotating the view by clicking on the quadrants rotates the view around only around, X,Y, Z axis.

  13. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS UNDERSTANDING UCS (USER COORDINATE SYSTEM) A Cartesian coordinate system has three axes, X, Y, and Z. When you enter coordinate values, you indicate a point's distance (in units) and its direction (+ or -) along the X, Y, and Z axes relative to the coordinate system origin (0,0,0). There are two coordinate systems: a fixed system called the world coordinate system (WCS) and a movable system called the user coordinate system (UCS). In the WCS, the X axis is horizontal, the Y axis is vertical, and the Z axis is perpendicular to the XY plane. The origin is where the X and Y axes intersect (0,0) in the lower-left corner of the drawing. The USER COORDINATE SYSTEM(UCS) allows you to reposition the XY plane for use of creating 3D models. The UCS icon changes according to changing orientation of the XY plane-changing UCS.

  14. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS UNDERSTANDING UCS (USER COORDINATE SYSTEM) But, you also have to know how AutoCAD measures angles of rotation in 3-D. There is a somewhat simple rule for this called "The Right Hand Rule". To figure out which is the positive rotation angle, imagine that you are wrapping your right hand around the axis with your thumb pointing towards the positive end. The direction that your fingers are wrapped is the positive direction. This applies to all three axes.

  15. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS UNDERSTANDING UCS THROUGH EXAMPLES As you can see from the two illustrations above, the UCS icon shifts its position to indicate the orientation of the current User Co-ordinate System. Also, when you are working in a UCS the W disappears from the icon to indicate that you are no longer in the World Co-ordinate System.

  16. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS SAMPLE TO 3D MODELS

  17. FFD 201 – BASIC 3D AUTOCAD COMMANDS AND TOOLS SAMPLE TO 3D MODELS

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