phoi canh

On the perspective of an inclined picture plane, what is the perspective of two straight line ?

• Converge at a point on eye level

• Duplicate

• Cut at a point above eye level

• There is no common point

On the perspective of an inclined picture plane, where is the vanishing point of two straight lines that parallel to both the picture plane and the ground plane?

• Converge at a point on eye level

• Duplicate

• There is no vanishing point

• Cut at a point above eye level

In perspective projection, what is the picture plane used for?

• On the picture plane, we draw the perspective projection of the object

• On the picture plane, we place the object to draw perspective

• The picture plane is used for the observer to stand up

What perspective projection systems are there?

• Inclined picture plane and vertical picture plane

• Only Inclined picture plane

• Only vertical picture plane

What are the characteristics of vertical picture plane?

• The picture plane is inclined at an angle greater than or less than 90 degrees to the ground plane

• The picture plane is parallel to the ground plane

• The picture plane coincides with the ground plane

• The picture plane is perpendicular to the ground plane

In which situation, the perspective of the inclined picture plane is used?

• When the observer looks straight, the axis of the cone of vision is parallel to the ground

• When the observer looks up, the axis of the cone of vision looks upwards

• When the observer looks down, the axis of the cone of vision looks downwards

• Both cases when the observer looks up or down, the axis of the cone of vision looks upwards or downwards.