Hey all, just wanted to see if i can get some feedback as to how you guys have your ctb's configured regarding line weights. I've heard theories from "the high visibility colors are used for most-common entities" to "color 1 is thinnest, 9 is heaviest" to "ctb's?"
i'd love to hear what theories some of the larger firms are using.
(in my hobby hours, i've been playing with the notion of coding various systems to a color and then using the light-dark gradient to indicate thickness. the colors ending with a "0" would be the base-line and have a "section-cut" thickness. colors ending with a "2" would be a typical "foreground" thickness and so on as the entities fade to the distance. not sure it will work out, but hey tryin' sum'in diffrint
We've got multiple disciplines contributing models to an overall product, and they all want their own colors. There aren't enough "named" colors (GREEN, YELLOW, RED, etc.) to go around, so I've set up the "numbered" colors (10 - 249) to plot the same weight as object lines in drawings. The "named" colors are used for annotations like dimensions and leaders, plus generic thin, medium, and thick lines. The "grey-scales" at the end of the list plot a mix of half-tones and line weights.
If one discipline wants anothers (say, electrical drawing referencing a piping model) as thin or half-tone to fade out, they only need to override the XREF layers with the generic thin line or one of the greys.
One of these years, I may finally persuade the others to stop using polyline thickness for P&IDs. Maybe.
when you say "object lines", (in addition to your comment about stopping using pline thickness) i assume that your guys set the lineweights per line and NOT by color? if so, my condolences
i was curious how you aligned the "named colors" with the line thicknesses. - like Red is thinnest (or thickest) and then Yellow is the next (thinnest/thickest). just wondering if there was an order to increasing/decreasing weights that corresponded to the color numbers.
currently ours are all over the place.
Actually I was using drafting parlance; "object line" (medium-heavy) vs. "dimension line" (thin) vs. "center line" (medium-thin) etc. All of our in-house stuff is BYLAYER - even when the client CTB is set for lineweight by object, the object is set BYLAYER, and the layer has a lineweight set.
Our named color lineweights are pick-and-choose, mostly through inheriting what the company did previously. Trying to migrate color settings was bad enough (objects and text both green, for example. Oy... ) About the only consistent thing is the maxim "Only use BLUE for uncommon things.", in our case very thick lines.
This response is sincere and not meant to start a fight, but moving to STB really makes a lot of sense, you should try it.
You could have styles named Object, Dim, etc if you wanted, no need to memorize your color mapping. Objects on the drawing could be any color and then you set your lineweights with the plot style names and if you think in terms of systems instead of colors for lineweights it becomes natural pretty quickly and you wonder how you ever used ctb. With STB you might only need 8 style names to replace the 255 you have now.
what are the "styles" of style tables based on? entities? or are they like styles in Word?
got it. they're analogous to Word Styles. seems they would be good for 3D but prob don't add much to 2D
They are just as good for 2D as for 3D, not sure how you arrived at that assumption. I don't think they are anything at all like Word styles.
Names styles are similar to color based styles except in ctb the styles are pen colors and those names can't be changed, in stb the styles are named by you, and the color that is plotted is controlled by the layer or object rather than by the pen color name.
Makes sense, but for one teensey problem: the vast majority of drawings are not our own, and pretty much our entire industry (oil and gas) is still CTB. We would have to convert all incoming files to STB, and all outgoing files to CTB. And futz around with certain clients who provide their own CTBs and/or settings. Many have specific color/plot thickness mappings, one even has the plot thickness (and therefore color) as part of the layer name even though they assign lineweight by the lineweight setting for the layer and have the CTB line weights as "by object setting".
dgorsman - that is a problem for sure and as such I would stay with CTB, but I was responding to the OP and didn't know about your specific needs.