Difference between Dashed
Pen Dash Pattern
Pen Dashed Pattern
Reference the attached screen-capture of my TC-Explorer Palette/Line Styles
I haven't added or changed any of the Line Styles; these are the TurboCAD-provided defaults.
Note that the "Dashed" Line Style has values of 2,.5,-.25
- The first "cell" (that's what I will call each value between each of the commas) is 2. That means that there are 2 values in the Line Style. Two elements that will go into making the pattern of the Line Style.
- The next cell is .5; That means that the Line will be .5 Units long.
- The next cell is -.25; the minus-sign-- or negative-symbol-- tells us that this will be a space. How long?... .25 long.
- Because the first cell was 2, we know this Line Style is "over"... it just repeats those values-- those pattern elements.
Now compare that-- with your new understanding of how Line Styles works... are "created"-- with the "Hidden" Line Style lower down in the table in the screen-capture. See how the "Hidden" Line Style will have a Line
that is .25 Units
long, followed by a space
that is .125 Units
When we set our Dash Scale
to 1 and
our Pen Width Scaling to "World" or "Device Width", the Dash Pattern fully reflects the values assigned to the Line Style in the "Line Styles Editor", at a 1:1 scaling. Tick "Geometry", and we can actually measure-- using a Dimension Tool-- to verify this.
Given that the "Dashed" Line Style and the "Hidden" Line Style both have only two elements
-- a line followed by a space-- and in both Line Styles, the space is half
the length of the line, with the correct Dash Scale
assigned in Objects' Pen Properties, "Dashed" and "Hidden" would essentially be drawn the same. As long as the Dash Scale
we assign to the "Dashed" pattern is half
of what we assign to the "Hidden" pattern (because the values in the "Dashed"-pattern Line Style are one-half
the values of those in the "Hidden"-pattern Line Style).
I hope that at least takes some of the mystery
out of what controls these Dash Patterns and how they are based on your Drawings Units, and not just some arbitrary, random, patterns.
Or... I may have just confused you and/or gave you some unnecessary, non-useful information. I hope not.