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Tag72a adds user scripts for document events

Tag72a settings

It seems that everyone running Tag72a needs something unique in their document information reporting. The settings panel has grown considerably trying to address as many user requests as possible, but along with flexibility comes the appearance of complexity!

One more preference has now been added, however, that should serve the purpose of countless additional items: the option to automatically run user scripts along with its own updates.

Why would you want to run a custom script? Well, for example:

  • Reformat a date to any of the many alternatives to the two formats in Tag72a.
  • Parse a filename to derive additional information such as version, language, region.
  • Re-order the spot color list so that certain colors are always shown first.

Simply check the “Run user scripts” option and Tag72a will look for and run any found scripts by these names.

  • Tag72a_doc_opened
  • Tag72a_doc_changed
  • Tag72a_doc_print
  • Tag72a_doc_save
  • Tag72a_doc_save_copy_as
  • Tag72a_update
  • Tag72a_every_event

You only need to use the script (or scripts) that are relevant to you. Some things to keep in mind are:

  • Doc Changed event happens every time a user switches from one document to another, including when a new document is opened or sometimes when a document is closed. You may not want to use both Doc Opened and Doc Changed events if one or the other does what you want. If both Doc Opened and Doc Changed run, it is not a bug, because Adobe Illustrator signals to the plugin that both events took place.
  • Doc Print and Doc Save happen just before the actual save or print takes place.
  • Doc Save Copy As happens just after you have saved a copy as, which enables the data to be updated from the saved version back to the currently-open version.
  • Update happens only when you click the Update button in the panel.
  • Every Event happens right after any of the other scripts runs, and works for all events regardless of what other scripts are there. You may want to put some scripting in Every Event and other scripting in specific events, depending on your needs.
  • All scripts run after Tag72a makes its own updates.
  • Your scripts may need to check the contents of the document to determine whether the script needs to run, because another event may have just run the script. Then again, it may not hurt anything if your script happens to run twice.

You can use either AppleScript or JavaScript. The plugin will run whichever version of the script Adobe Illustrator added to its Scripts menu.

If you write a custom script for one or more of these events, please share your idea with other users!

Horizontal extruding

First, I’d like to thank everyone who participated in the AxoTools survey. The meaningful comments are already making a difference in AxoTools’ features and documentation.

The most surprising thing was the number of users who wanted to extrude horizontally for a stylized drawing such as this one by Dörte Roßmann.

horizontal perspective

That seems like a natural thing for AxoTools to do, but we can’t forget that the plugin’s core function is to help illustrators work in views like isometric, dimetric, and trimetric where we see three surfaces, not two. It has never been a design tool, although there’s nothing wrong with bending the rules a bit to accomplish some design effects as long as it doesn’t hobble the plugin’s primary purpose.

Horizontal extruding has been available using the Extrude panel. Just set the angle to 0 and leave the option to project the art unchecked. That gives you something like this:

extrude panel 0 angle horizontal cylinder

If you projected the art with a 0° angle, you’d simply get a rectangle. The reason for this is that the Extrude panel, like the Extrude tool, work in the context of the current projection. If you drag a circle with the Extrude tool while holding the Cmd or Ctl key for a freeform angle, you’ll see that at a horizontal angle, all you see is a side view of your original shape.

horizontal extruding

To make things easier for people working with horizontal extruding, the Projection panel in the latest free update to AxoTools now supports broader Tilt and Turn values, which allows you to do a full-fledged horizontal extrusion.
Projection panel with 0 tilt  horizontal cylinder
Previously, values of 0 or 90 were not allowed for Tilt or Turn because they essentially hid one or even two of the three axonometric planes. Now, using a Tilt value of 0, or Turn value of 0 or 90, will disable the X and Z axis fields because there must be an incline on both axes in order to calculate the tilt and turn — in a case like this, the turn value is ambiguous. A Tilt value of 90 is essentially a top axo view, so Tilt is limited to 89°.
It’s important to understand, too, that at projections where the X and Z axes overlap, horizontal extruding is always on the X axis, so using the Extrude tool, the edges always drag out to the left. Can that be “fixed” to allow horizontal extruding to the right? Well, yes, if we add complications to an interface that some people say is already way too complicated. A workaround is that, with a Tilt value of 0, the Extrude panel extends your path to the left, while with other Tilt values, the panel extends it to the right.
In response to user requests, you can now press Shift when dragging with the Extrude tool to constrain to right angles. That won’t give you the above effect, though, because it’s constraining a freeform extrude. That is, it’s calculating what that shape looks like within your current projection, not a shadow effect.
If you truly want to go completely independent of the document’s current projection, you can always use the Transformations panel, which allows you to rotate and extrude your art in any orientation you like, be it upside-down or even backward.
Transformations panel
More user-requested options are coming soon.

AxoTools adds Action support

Now you can record and play back actions that include many AxoTools functions, with the free update to AxoTools available online for Adobe Illustrator CC 2019 through 2023. Actions currently supported include:

  • Project art to or from an axonometric plane
  • Extrude, either from the tool or the panel
  • Axo Scale
  • Axo Rotate
  • Axo Shear
  • Axo Move
  • Axo Rectangle
  • Axo Ellipse

Actions will play back using the current document projection settings. That is, if you recorded moving or extruding an object along an axis of an isometric view, then changed your document’s projection, it would adjust to operate using the current projection. Action playback also honors your current draw settings and Projection panel options so old actions adapt to your current environment.

One example of using actions with AxoTools is a technique to do a block shadow effect (even though AxoTools was never made for that).

  1. Select path art to which you want to add a shadow
  2. Start recording the action
  3. Select Edit > Copy
  4. Extrude the art without projecting it, using either the Extrude panel or Extrude tool
  5. Set the fill and stroke of the extruded and selected art to your shadow color
  6. Select Edit > Paste in Front
  7. Stop recording

Now any time you want to add a similar block shadow, just select your art and run this action!

block shadow action

I’m curious what ingenious actions other AxoTools users will come up with. Maybe one to construct a detailed hex nut? Please let us know in the comments below.

AxoTools user survey

AxoTools Projection panel

If you’ve used AxoTools, either as a trial or as part of your everyday work, please take the AxoTools user survey to help us improve the plugin and its user experience.

AxoTools user survey

This will help to identify:

  • Which features are most important, or least important
  • Which features to revise, and which to leave alone
  • Direction for development of new tutorial videos and documentation

How can we make AxoTools work better for you? Your observations and concerns are important to us.

Multiple line weights in technical illustration

You may have seen a recent video summarizing methods to use multiple line weights in your illustrations.

It’s probably helpful to go into a bit more detail and show more examples.

single line weightUsing a single line weight (or “stroke width” as it applies to Illustrator’s path art property) is a simple and efficient way to work. 

upper-left shaded line weight

By using more than one line weight, however, your illustrations can have more interest and suggest form.

One method assumes a light source in the upper left. Here edges facing away from the light are given a heavier weight. This was the standard where I worked at Kalmbach Publishing Co. in the 1970s. My mentors there told me it was adopted from a standard for US Patent Office drawings. It was easy to apply using pen and ink, but when they switched from Rapidograph pen to Adobe Illustrator in the 1990s, they switched to a single line weight. Adobe Illustrator, unfortunately, doesn’t lend itself well to multiple line weights, especially if the path is filled.

GP30 hood line exampleHere’s an example of an illustration I did using the “Kalmbach” method, drawn in ink at 1.5 times reproduction size. Detail lines were drawn with a 4×0 Rapidograph pen, and the heavy lines were probably a no. 0 or 1 pen. In those days, we typically cut an Amberlith overlay to add a flat tint to the background, which helped separate the subject from the background.

dual line weightA more common method called “line contrast shading” used in exploded-view parts drawings uses heavier lines on all outside edges of objects. In this example, the bottom of the cube and cylinder are thin lines because they represent the joint between two surfaces. A heavy line would suggest the objects float above the other art. In the case of the round hole, a varied line width makes a smooth transition between the front- and rear-facing edges. Complex illustrations can use three or four line weights. Standards are more like guidelines, actually, that vary between people and between businesses, often based largely on the personal preference of someone with experience and/or influence.

filter drawingfilter drawing

Greg Maxson drew these filter illustrations with pen-and-ink on Mylar for Hyster Co. back in the late 80’s. He explained, “You could really get lost in the detail with pen-and-ink. Lines within an object are thin, exterior object lines are heavier, and exterior object lines that are down and away from the light source are heavier and darker still. The heavying up of the lines down and away from the light source was typically used when illustrating larger equipment, machinery, etc. to give those objects more visual weight. Appropriate for rendering a bulldozer, but less appropriate for rendering the exploded illustration of an ink pen, for example. Of course, super thin interior object lines were/are common when used to represent less than 90 degree radii, and thin broken lines to represent a highlight along an edge, knurling, screening, etc.”

suspension drawingGreg used a three weight treatment  on this Raptor suspension illustrations for Car and Driver magazine.

Maxson spark plugOne more piece by Greg Maxson shows his skill at technical illustration using a variety of software, often including SketchUp, Illustrator, and others. Here he adds clarity to the subject with varied line weights, line colors, sometimes sketchy line treatments, and meaningful shading and textures in filled areas.

When AxoTools adds add multiple line weights, it places stroked paths above non-stroked filled paths so weights can change as needed anywhere along the object without affecting the fill. With a simple click of the Axo Line tool, you can toggle weights between thick and thin as necessary. In the coming months, users can expect to see more refinements in AxoTools handling of stroke properties. Please contact me if you have ideas that can make your work faster or easier.

Project a house to isometric

It really is possible to project these orthographic drawings of a house to isometric in less than a minute! I actually did it in 35 seconds!

This video gives an overview of the process using AxoTools in Adobe Illustrator. You can find the step-by-step instructions and link to the project file (saved for Adobe Illustrator CC 2019) here:

Project to isometric

Project and extrude in isometric

The technique highlights AxoTools’ project-in-place functionality using reference points for quick, accurate placement, ad well as extruding in an axonometric view, measured from a corresponding distance dragged in a flat ortho view.

This visual approach eliminates tedious measuring or counting of isometric grid units. Try it! If you don’t have AxoTools, you can download it here.

Project to isometric

AxoTools gradient shading

Gradient shading

The latest update to AxoTools includes three improvements to shaded fills on extruded art. First, curved paths now have a gradient fill to more accurately show the curvature of the surface.

shaded objects

Second, the lighting is based on the location of a theoretical light source, so surfaces are shaded based on their actual orientation relative to the light, and no longer assigned a simple “top,” “left,” or “right” tint or shade.

Third, the light source is user-definable.

When you extrude a path, its fill color is used as the base color for shading values. For each base color AxoTools uses, it creates a gradient that’s stored in the document’s Swatches panel. To use your own gradient for shade values, just fill your starting object with the gradient and extrude it.

There is also a new panel where you can make adjustments to your light and shading, but it’s important to stress that you don’t ever have to fuss with those controls in order to use the new lighting and shading features. Most of you will probably want to stop reading here and just go download the update!

More for “explorers”

For those other few people in the room who want to take things a notch or two higher, the new panel works in three areas:

  • Gradient colors
  • Light location
  • Lighting properties.

At the top of the panel is a series of five color well widgets that represent the five stops on the shading gradient ramp for your current document color. The gradient itself represents the range of all possible colors to apply to your fills. AxoTools generates a shaded gradient ramp for each fill color you start with when you extrude with the shading option enabled.

gradient ramp

The gradient represents the range of possible tints and shades available based on the angle of the lighting. The first gradient stop represents the lightest highlight color where the light hits it at a 90° angle. Using the default settings, the angle of light on the left isometric plane falls very close to the second stop, which is set to the original color. The third stop represents the shade when the light hits an object on its edge, and stops 4 and 5 represent the rear surfaces, with the last stop showing the effect of backlighting.

The light source’s location is defined with the familiar Tilt and Turn adjustments, which are relative to the viewer. Following these are slider controls for the light intensity, ambient light, and amount of backlighting. As you make adjustments to the lighting properties, the color wells along the top of the panel will preview the results of changes to the intensity, ambient, and backlight lighting properties.

At the bottom right, the “Reset to defaults” button will restore the default settings for all slider controls.

Below the color wells are two buttons relating directly to them. The “Rebuild gradient” button will generate five shades of the current document color.

The “Save gradient” button, I’ll confess, was included for the true “explorers.” If you changed the colors in the color well controls, either by changing lighting properties or using the color pickers in the color wells, this will overwrite the gradient ramp used for the base color.

Please see the online documentation for more information.

I hope you find this new feature useful!

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