An "object" is a set of points that is understood to be one singular entity.
Contiguity and having the same color are strong indicators that something should be understood as an object.
A rectangular container.
The toplevel viewport is always implicitly understood as a special box.
There are two or more boxes drawn inside the toplevel and sharing boundaries with toplevel.
There are two toplevel boxes, one contains only input, and all output goes to the second one. The second one may also contain some input.
A path is something you obtain by somehow drawing from one point to another, e.g. a line, and then starting another drawing between two points from the end point.
Distance = 0.
Rectangle is like a box but always fully filled.
A point is a 1-square.
A dotted line is a generalized line that cycles between a color pattern, e.g.:would be a line:An extra color "transparent" may also be added to not change for that pixel.
r r g
r r g r r g r r g
A dotted path that is also a dotted line.
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