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Chapter 7: Drawing
About drawing
About vector graphics
Vector graphics are made up of lines and curves defined by mathematical objects called vectors . Vectors describe an
image according to its geometric characteristics. For example, the boot laces in a vector graphic are defined by a
specific width and length, set at a specific location, and filled with a specific color. You can move, resize, or change
the color of the laces without losing the quality of the graphic.
Vector graphics are resolution-independent—that is, they can be scaled to any size and printed at any resolution
without losing detail or clarity. As a result, vector graphics are the best choice for representing graphics that must
retain crisp lines when scaled to various sizes—for example, logos.
200%
800%
Vector graphic at different levels of magnification
About paths
As you draw, the resulting line is called a path . A path is made up of one or more straight or curved segments . The
beginning and end of each segment is marked by anchor points , which work like pins holding a wire in place. You
change the shape of a path by editing its anchor points. You can control curves by dragging the direction points at the
end of direction lines that appear at anchor points.
A path is either open , like an arc, or closed , like a circle. For an open path, the starting and ending anchor points for
the path are called endpoints .
A
E
B
C
D
Components of a path
A.
Selected (solid) endpoint
B.
Selected anchor point
C.
Curved path segment
D.
Direction line
E.
Direction point