MECT 1330 Final Exam Study Guide
Dimensional Constraints - answer define the distance between two geometric elements
geometric constraints
Geometric Constraints - answer define a relationship such as parallelism or
perpendicularity between elements
Sketching - answer Transferring of ideas or concepts onto paper or into a computer to
quickly capture them graphically.
Drawing - answer Transferring of an object's size, shape, proportion and/or main
features onto paper or into a computer
Orthographic Projection: - answer creates a 2-D image of 3-D objects or structures on
an image plane perpendicular to the lines of sight.
Axonometric Projection: - answer creates pictorial drawings of objects by rotating the
object on an axis relative to a projection plane.
Oblique Drawing: - answer results when the projectors are parallel to each other but at
some angle other than perpendicular to the projection plane.
Perspective Drawing: - answer A projection technique in which some or all of the
projectors converge at predefined points.
Convex Hall: - answer A simple grid that is the gross outline of the object. Does not
contain detail of the objects.
Conditions - answer Similar to constraints but they are not enforced, conditions are
simply the geometric (or kinematic) state of a feature at a given moment or location.
3-D Primitives: - answer Objects embedded in 3-D space such as space curves surfaces,
and basic solid objects.
Extrude(Linear Sweep): - answer Define the length (and direction) of the "sweep."
Direction cannot be parallel to the sketch plane.
Revolve (Revolute sweep): - answer Define the axis and the amount of rotation.
Sweep (Path-based sweep): - answer Define a space curve along which the profile will
be swept.
Loft (blended sweep): - answer Define space curve and intermediate profiles along the
curve.
Topology: - answer The study of geometric properties and spatial relations unaffected
, by the continuous change of shape or size of figures.
Parametric constraints: - answer Parametric constraints ensure that a drawing
maintains its original precision by maintaining the relationships between an object and
world space, between two objects, or within the object itself. (Examples: Dimensional
and Geometric)
Kinematic Constraint: - answer Kinematic constraints are constraints between rigid
bodies that result in the decrease of the degrees of freedom of rigid body system.
Mate: - answer Two surfaces associated with different objects are set to be coplanar
with direction vectors in opposing directions.
Offset - answer Instead of the surfaces being co-planar, an offset distance is specified.
Align Axis: - answer Axes (directional vectors) are constrained to be either colinear or at
specified relative angle.
Projection Theory: - answer This is the theory used to create 2-D representations
(projections) of a 3-D object in a prescribed way. You can think of a projection theory as
a mapping theory.
Third-Angle Projection: - answer When the projection plane is between the observer and
the object.
First-Angle Projection: - answer When the object is between an observer and the
projection plane.
Perspective Projections: - answer There is a finite distance, "d", between the observer
and the object. The lines of sight seem emanate from the observer.
One point Perspective: - answer a drawing method that shows how things appear to get
smaller as they get further away, converging towards a single 'vanishing point' on the
horizon line.
Parallel Projections: - answer a projection of an object in three-dimensional space onto
a fixed plane, known as the projection plane or image plane
Dimensional Constraints - answer define the distance between two geometric elements
geometric constraints
Geometric Constraints - answer define a relationship such as parallelism or
perpendicularity between elements
Sketching - answer Transferring of ideas or concepts onto paper or into a computer to
quickly capture them graphically.
Drawing - answer Transferring of an object's size, shape, proportion and/or main
features onto paper or into a computer
Orthographic Projection: - answer creates a 2-D image of 3-D objects or structures on
an image plane perpendicular to the lines of sight.
Axonometric Projection: - answer creates pictorial drawings of objects by rotating the
object on an axis relative to a projection plane.
Oblique Drawing: - answer results when the projectors are parallel to each other but at
some angle other than perpendicular to the projection plane.
Perspective Drawing: - answer A projection technique in which some or all of the
projectors converge at predefined points.
Convex Hall: - answer A simple grid that is the gross outline of the object. Does not
contain detail of the objects.
Conditions - answer Similar to constraints but they are not enforced, conditions are
simply the geometric (or kinematic) state of a feature at a given moment or location.
3-D Primitives: - answer Objects embedded in 3-D space such as space curves surfaces,
and basic solid objects.
Extrude(Linear Sweep): - answer Define the length (and direction) of the "sweep."
Direction cannot be parallel to the sketch plane.
Revolve (Revolute sweep): - answer Define the axis and the amount of rotation.
Sweep (Path-based sweep): - answer Define a space curve along which the profile will
be swept.
Loft (blended sweep): - answer Define space curve and intermediate profiles along the
curve.
Topology: - answer The study of geometric properties and spatial relations unaffected
, by the continuous change of shape or size of figures.
Parametric constraints: - answer Parametric constraints ensure that a drawing
maintains its original precision by maintaining the relationships between an object and
world space, between two objects, or within the object itself. (Examples: Dimensional
and Geometric)
Kinematic Constraint: - answer Kinematic constraints are constraints between rigid
bodies that result in the decrease of the degrees of freedom of rigid body system.
Mate: - answer Two surfaces associated with different objects are set to be coplanar
with direction vectors in opposing directions.
Offset - answer Instead of the surfaces being co-planar, an offset distance is specified.
Align Axis: - answer Axes (directional vectors) are constrained to be either colinear or at
specified relative angle.
Projection Theory: - answer This is the theory used to create 2-D representations
(projections) of a 3-D object in a prescribed way. You can think of a projection theory as
a mapping theory.
Third-Angle Projection: - answer When the projection plane is between the observer and
the object.
First-Angle Projection: - answer When the object is between an observer and the
projection plane.
Perspective Projections: - answer There is a finite distance, "d", between the observer
and the object. The lines of sight seem emanate from the observer.
One point Perspective: - answer a drawing method that shows how things appear to get
smaller as they get further away, converging towards a single 'vanishing point' on the
horizon line.
Parallel Projections: - answer a projection of an object in three-dimensional space onto
a fixed plane, known as the projection plane or image plane
