lecture 5 Flashcards
what does the projection do ?
it just transform points in n space to m space where n>m
in planer projection what is projectors ?
they are stight lines from center of projection through each point in the object
the center of projection at infinity in ?
1-Perspective Projection
2-Parallel Projection
2-Paralllel Projection
in the Perspective Projection the projectors ?
1- converge to center of projection
2- keep going to the infinity
1- converge to center of projection
the parallel projection Determined by ?
1- the center of projection
2- the eye
3- the direction of projection
3- the direction of projection
do the projector in the parallel projection meet or cross each other at some point ?
no becase they are parallel
in the Orthographic projection the DOP is not perpendicular to pp
false the DOP (direction of projection ) is perpendicular to the pp ( project planer )
which one of these it’s DOP is not perpendicular to PP ?
1- Orthographic projection
2- Oblique projection
3- Perspective projection
4- Parallel projection
2- Oblique projection
in the othographic projection do we have accurate measurment ?
yes we have
in the othographic projection does it provide a realistic view for a 3D form
no it doesn’t
in the othographic projection are all view at the same scale ?
yes they are
in the othographic projection the projection plane is not perpendicular to any of the principal axes?
false it is perpendicular to one of the axes
if it is perpendicular to the x it is a side view
and if it is perpendicular to the y it is a top view
and if it is perpendicular to the z it is a front view
in the Axonometric Projections the Projection plan is perpendicular to the x axis ?
no it is not perpendicular to the x or the y ,z axis
in the Axonometric Projections if the angle between two of the principal axes are equal then it is ?
1- Isometric and need the same scale ratio
2- Dimetric and need the same scale ratio
3- Dimetric and need two scale ratio
4- Trimetric and need the same scale ratio
5- Trimetric and need two scale ratio
3- Dimetric and need two scale ratio
in the Trimetric we need ?
1- one scale ratio
2- two scale ratio
3- three scale ratio
4- four scale ratio
5- no scale ratio
3-three scale ratio
