chapter 3 Flashcards
Angle
formed by two intersecting lines
angular perspective
Most common type of perspective drawing
angular perspective or two-point perspective
If the object sits at an angle with the picture plane but with vertical edges parallel to the picture plane, two vanishing points are required.
designating a method of projection (axonometric projection) in which a three-dimensional object is represented by a drawing (axonometric drawing) having all axes drawn to exact scale, resulting in the optical distortion of diagonals and curves.
axonometric
consists of imagining the object enclosed in a rectangular box whose sides coincide with the main faces of the object.
box construction
when the receding lines are true length -( the projectors make an angle of 45* with the plane of projection) the oblique drawing is
cavalier projection
when the receding lines are drawn to half size
cabinet projection
lines used to block in light guidelines
construction lines
the main outlines that separate it from the surrounding space.
contours
planar
single curved
double curved
warped
four types of surfaces
has equal foreshortening along two axis directions
dimetric projection
where two surfaces intersect
edge
to reduce or distort
foreshortening
done by hand shows clarity and attention to proportions
freehand sketch
lines
hatching
the projections of the edges of a cube make angles of 120* with each other
isometric axes
all angles btween the axonometric axes are equal
isometeric projection
80% of true size
isometric scale
when you make a drawing using the full-length measurements of the actual object.
isometric sketch or isometric drawing
represents the edge of a solid surface
line
unoccupied space around an object
negative space
lines of an isometric drawing that are not parallel to the isometric axes
nonisometric lines
to mean “at right angles”
normal
method for creating quick pictorial
oblique drawing
can be at any angle to the plane of projection other than perpendicular or parallel.
oblique projectors
visual rays are parallel to each other but an angle other than 90*
oblique projections
when one vanishing point is required
one point perspective
