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Answer:

No verbal answer is required here.


Points in Space

Line between two Finials

In the physical world (the "real world"), the endpoints of the two spikes are at definite locations. Later on in these notes, locations will be specified using a coordinate frame. But for now let's just think of points in space. In 3D graphics programs you put points in space, and lines in space, and other things in space. And then project them into a 2D picture.

This mimics what has happened when the picture was produced with a camera. The ends of the spikes in the physical are two points in 3D. The whole scene was projected by a lens onto a 2D image sensor. The ends of the spikes in the 2D picture define two 2D points.



QUESTION 4:

What is the distance between the two points at the ends of the spikes?