Upload
syed-saifullah-wan-ahmad
View
52
Download
0
Tags:
Embed Size (px)
Citation preview
MOHD NIZAM B KATIMON 1
BDA 20502
MOHD NIZAM B KATIMONJKBR, FKMP
MOHD NIZAM B KATIMON 2
Chapter 1
Intro - 3D TermsCoordinate System
Started with 3DUCS
Orthographic view
Intro - 3D Terms
Wireframe Model:
MOHD NIZAM B KATIMON 3
MOHD NIZAM B KATIMON 4
Intro - 3D Terms
Surface Model:
Intro - 3D Terms
Solid Model:
MOHD NIZAM B KATIMON 5
MOHD NIZAM B KATIMON 6
AutoCAD 2009
RIBBON
MOHD NIZAM B KATIMON 7
Coordinate System and Snaps ApplicationAbsolute coordinatesRelative coordinatesDirect distance entry
Objects snap
MOHD NIZAM B KATIMON 8
Coordinate Systems
AutoCAD uses the following coordinate systems to locate a point in an XY plane.
1. Absolute coordinates2. Relative coordinates
- Relative rectangular coordinates- Relative polar coordinates
3. Direct distance entry
MOHD NIZAM B KATIMON 9
Coordinate Systems
• Absolute coordinates- points are located with respect to the origin (0,0)
Command: Line
(10,10) (50,10)
(10,50) (50,50)
MOHD NIZAM B KATIMON 10
Coordinate Systems
• Relative rectangular coordinates- the displacements along X,Y axes are measured with reference to the previous point rather than to the origin (0,0)
Command: Line (@0,50)(@-50,0)
(@0,-50)(@50,0)
(10,10)
MOHD NIZAM B KATIMON 11
Coordinate Systems
• Relative polar coordinates- defining both the distance of the point from current point and the angle
Command: Line
(@50<30)
(10,10)
MOHD NIZAM B KATIMON 12
Coordinate Systems
• Direct distance entry- the direction is determined by the position of the cursor
Command: Line
MOHD NIZAM B KATIMON 13
Snap Application• Object snaps (OSNAP) - to improve
performance/accuracy and make drafting simpler• Keyboard Shortcut ON/OFF: F3 • Command: OSNAP
Snap Application
MOHD NIZAM B KATIMON 14
• OSNAP Overrides- Use SHIFT + Right-click and select the object snap from the shortcut menu
MOHD NIZAM B KATIMON 15
Started with 3D
MOHD NIZAM B KATIMON 16
Started with 3D
MOHD NIZAM B KATIMON 17
UCS
World Coordinate System (WCS)• Fixed origin (0,0,0) located at the lower left corner by
default and cannot be removed.• WCS is generally used in 2D drawings, wireframe
models and surface models.
Why UCS?make easier in create a feature.UCS allows to relocate and reorient the origin depends to user, mostly used in 3D.
UCSConventions in AutoCAD- ‘Right-hand rule’ – identify the X,Y,Z axes direction.
MOHD NIZAM B KATIMON 18
‘Right-hand thumb rule’- Identify the direction of rotation in 3D space.
UCS
1. Toolbar
2. Command : UCS
MOHD NIZAM B KATIMON 19
MOHD NIZAM B KATIMON 20
UCSUCSICON (2 methods)1. Menu : View > Display > UCS Icon2. Command : UCSICON
Select “properties”
MOHD NIZAM B KATIMON 21
Orthographic View
• Understandings X, Y and Z axes
• XY, YZ, XZ Plane
x
Z
Y
MOHD NIZAM B KATIMON 22
Activities• Construct 3D Wireframe Model
Guide:• Use line Command• Ortho ON • Work on XY plane