Orthographic Projection of Points

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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.

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Orthographic Projection of Points
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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).

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The X, Y, and Z axes
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The X and Y axes form the XY Plane
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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.
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Each plane has only two coordinates. This means
the point can not be fixed in space until another
reference plane is used.
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The X,Y plane is also called the Horizontal
plane.
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This is because it is horizontal or lies flat in
the coordinate system. Just like paper on a
drafting board.
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The Horizontal projection planes represents the
top or bottom view of an object.
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The Z and X axes form the ZX Plane
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If the grid is equal to 10mm each, then the
points coordinates are Z20, X20.
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The ZX plane is also called the Frontal plane.
You can see elevation (height) in the Frontal
plane.
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If the grid is equal to 10mm each, then the
points coordinates are Z20, X20.
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The Frontal projection planes represents the
front or back view of an object.
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The Y and Z axes form the YZ Plane
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Again, if the grid is equal to 10mm each, then
the points coordinates are Y20, Z20.
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The YZ plane is also called the Profile plane.
You can see elevation (height) in the Profile
plane.
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The Profile projection planes represents the
right or left view of an object.
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The image is projected onto each principal plane
to form the orthographic views.
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The coordinates appear on each plane in this
manner.
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Rotate the Horizontal plane 90 degrees and align
with the Frontal plane.
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This will create a two-view orthographic
projection.
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Rotate the Profile plane 90 degrees and align
with the Frontal plane.
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This will create a three-view orthographic
projection.
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Relationship and alignment of Principal
orthographic views.
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Plotting a Point onto the Horizontal Plane.
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Plotting a Point onto the Frontal Plane.
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Plotting a Point onto the Profile Plane.
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The orthographic representation of the point.
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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.

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