1
Agenda
• Review of Geometric Elements
• Intro of Multiview Drawings
– Observer Viewpoint
– Projection lines
– Plane of Projection
• Principle Views
• Review of Lines
• Quiz
Points, Lines
•
Point
 Theoretical Location that has neither width,
height, or depth.
•
Node
common reference in computer graphics to
mean point
•
Locus
represents all possible positions of a point
such as a locus of center points for circles
•
Line
is a geometric primitive that has length and
direction but no thickness.
Point, Lines, Nodes Graphic Representation
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
Line Terminology
• Straight Line generated by a point moving in a
constant direction finite
• Ray straight infinite line
• Parallel Lines two or more lines that are a
constant distance apart
• Perpendicular Lines two or more lines on a plane
intersecting each other at a 90° angle, sometimes
called normal
• Intersecting Lines two or more lines cross each
other at a common point no specific angle to each
other
Line Terminology
• Tangency when a straight line is in contact
with a curve at a single point usually at a
90º angle from a radius line from the center
of the arc or circle
Angles
• Complete
Circle
360º
•
Acute Angle
is an angle whose measure is greater than 0
but less than 90 degrees.
•
Right Angle
is an angle whose measure is exactly 90
degrees.
•
Obtuse Angle
is an angle whose measure is greater than
90 but less than 180 degrees.
•
Straight Angle
Straight angle is an angle whose measure
is exactly 180 degrees.
•
Complementary Angles
This is the end of the preview.
Sign up
to
access the rest of the document.
 Fall '08
 Mohler,J
 Multiview Drawings

Click to edit the document details