Question

the projection of sphere always​

Answer 1

Explanation:

• The perspective projection of a sphere can be a circle, an ellipse, a parabola or a hyperbola. You only get a circle when the sphere is centered in the screen. Consider the plane that contains the eye and is parallel to the screen. ... In that case, you will only get one branch of the hyperbola.

Answer 2

Answer:

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Explanation:

The perspective projection of a sphere can be a circle, an ellipse, a parabola or a hyperbola. ... Then the projection of the sphere is: *an ellipse if the vanishing plane and the sphere don''t intersect; *a region limited by a parabola if they intersect in a single point