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Orthographic Projection of Points

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This means the point can not be fixed in space until another reference plane is used. ... The coordinates appear on each plane in this manner. 22 ... – PowerPoint PPT presentation

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Title: Orthographic Projection of Points


1
Orthographic Projection of Points
  • Definition Orthographic Projection is a
    system of drawings composed of images of an
    object formed by projectors from the object
    perpendicular to one or more desired planes of
    projection.

2
Orthographic Projection of Points
3
Orthographic Projection of Points
  • Orthographic projection is the graphical
    equivalent of the Cartesian coordinate system.
  • An object in space can be located graphically
    from three reference planes.
  • We will use the X,Y, and Z axes to construct the
    XY, YZ, and ZX planes.
  • These planes are mutually perpendicular and are
    called the Principal Planes (or views).

4
The X, Y, and Z axes
5
The X and Y axes form the XY Plane
6
You can plot a point on the X,Y plane. If each
grid below equals 10mm then the coordinates of
the point would be X20, Y20.
7
Each plane has only two coordinates. This means
the point can not be fixed in space until another
reference plane is used.
8
The X,Y plane is also called the Horizontal
plane.
9
This is because it is horizontal or lies flat in
the coordinate system. Just like paper on a
drafting board.
10
The Horizontal projection planes represents the
top or bottom view of an object.
11
The Z and X axes form the ZX Plane
12
If the grid is equal to 10mm each, then the
points coordinates are Z20, X20.
13
The ZX plane is also called the Frontal plane.
You can see elevation (height) in the Frontal
plane.
14
If the grid is equal to 10mm each, then the
points coordinates are Z20, X20.
15
The Frontal projection planes represents the
front or back view of an object.
16
The Y and Z axes form the YZ Plane
17
Again, if the grid is equal to 10mm each, then
the points coordinates are Y20, Z20.
18
The YZ plane is also called the Profile plane.
You can see elevation (height) in the Profile
plane.
19
The Profile projection planes represents the
right or left view of an object.
20
The image is projected onto each principal plane
to form the orthographic views.
21
The coordinates appear on each plane in this
manner.
22
Rotate the Horizontal plane 90 degrees and align
with the Frontal plane.
23
This will create a two-view orthographic
projection.
24
Rotate the Profile plane 90 degrees and align
with the Frontal plane.
25
This will create a three-view orthographic
projection.
26
Relationship and alignment of Principal
orthographic views.
27
Plotting a Point onto the Horizontal Plane.
28
Plotting a Point onto the Frontal Plane.
29
Plotting a Point onto the Profile Plane.
30
The orthographic representation of the point.
31
Orthographic Projection of Points
  • Principal Views. Six total.
  • Principal views are two types...Horizontal and
    Elevations.
  • Adjacent Views.Views that are hinged to each
    other.
  • Related ViewsViews that are adjacent to the
    same intermediate view. These views share the
    same coordinate distance.

32
Relationship and alignment of Principal
orthographic views.
ADJACENT VIEWS.
RELATED VIEWS.
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