Assigning Multiple Double Click Actions to Single Entity Type in AutoCAD

In the Unleash the Double Click Power post, you saw how to customize the double click action of an entity type to implement custom double click actions. Now we are going to see how we can implement different double click actions simultaneously on single entity type. Normally, we accomplish this by using Reactors or Events in the respective languages. But, we are not going to use any of these in our method. Rather, we will follow a tricky way to achieve the same result.

As an example, I will show you how to change the double click action of an 'Attribute Block'. Normally double clicking an attribute block shows the Enhanced Attribute Editor Dialog. We are going to change this to show either Enhanced Attribute Editor(_eattedit) or Edit Attributes dialog (_attedit) depending on certain condition. Let's say, when we double click on a title block named TITLE_BLOCK, it should display the Enhanced Attribute Editor dialog and for all other blocks in the drawing, it should display Edit Attributes dialog. The step by step configuration is given below.

1. Open CUI and create a custom command with the following code inside the macro section of the command. If you don't know how to create a custom command, then refer to the 'Unleash the Double Click Power' post mentioned above. Replace the 'TITLE_BLOCK' inside the following code with your actual title block name.
   ^C^C(if (= (cdr (assoc 2 (entget (ssname (ssget "P") 0)))) "TITLE_BLOCK") (command "_eattedit")(command "_ddatte" ))


2. Drag and drop the custom command under the 'Attribute Block' section inside the Double Click Actions.
   


3. Click on 'Apply' and close the CUI dialog.
   

That's it. Now if you double click on the title block, it will open the Enhanced Attribute Editor dialog and for all other attributed blocks, it will open Edit Attributes dialog. By the way, don't forget to take a backup of the default CUI files before you start experimenting with them.

Quick Tip - A Shortcut for Closing Active Drawing

You already know that ALT+F4 can effectively be used to quit a running application in windows operating system. For those who don't know, pressing CTRL+F4 inside AutoCAD will close the active drawing without touching the application or other drawings already open over there. Though it's a more straight forward shortcut than the ALT+F+C, I would like to stick to the latter as it looks easier to me (May be because I am used to that). CTRL+F4 shortcut is not limited to AutoCAD, but it works well with almost all windows multi document interface (MDI) applications.

My New Year Wish - An Intermediate AutoCAD Product for 2D Designing & Draughting

Why? Let's have a look at the existing product line. ie, Vanilla AutoCAD and AutoCAD LT. You might be able to find an answer from there.

AutoCAD LT: The lack of strong application programming interfaces makes AutoCAD LT really handicapped in the perspective of a Power User or CAD Administrator. You can not use any of your custom commands developed using AutoLISP/VBA/Dotnet/ObjectARX inside LT. The remaining option called DIESEL is only good enough to make small macros. Not only that; the number of commands are limited as compared to the full version.

Vanilla AutoCAD: Very powerful platform for 2D as well as 3D designing and modeling. The disadvantage is that it's loaded with comprehensive 3D modeling and rendering engines which are not at all used by the 2D user. Believe me; I have never used any of the 3D modeling or rendering features for the past 4 or 5 years for official purpose. That means the 2D users are carrying a burden over their shoulders and have been quite unnecessarily paying for the unwanted features. They could work much faster, if all those unwanted features were not loaded over there. The recent versions of AutoCAD show that it is more inclined towards 3D development than the 2D ones.

The need of the moment is an intermediate AutoCAD Product, which offers the power of Vanilla AutoCAD customization and 2D features minus all the 3D/rendering features with an attractive price tag. In that case, managers don't have to think twice at the time of purchase/upgrade of the product as they normally would do. As of now, we are forced to use Vanilla AutoCAD as we have in-house discipline specific menus and associated programs.

I am sorry to have started the New Year in a rebellion mood. But we really wish to see such a product available in the industry. Please note that the above views and opinions are my personal ones and those don't reflect the views or policies of the company I am working for. I take this opportunity to wish you a happy and prosperous new year. May the New Year make our dreams (including the CAD related ones ;-) come true...!! Many thanks to all you people for visiting my blog.

Developing a Sine Wave Generator using DIECAL

In the last post, we saw how easiy we could accomplish complicated operations using DIECAL. Further to that, we are going develop a sine wave generator using a few lines of code. I know that you don't have a sine wave generator even in your wildest DIESEL dreams. But it is a really simple task using DIECAL. Once again, I am going to use points in order to make it simple. For generating sine wave, use the following macro.

*^C^C_setvar;userr1;$M=$(+,$(getvar,userr1),$(getvar,userr2))$(if,$(>=,$(*,$(+,$(getvar,userr1),$(getvar,userr2)),10),$(*,$(getvar,userr3),360)),^C)_Point;'CAL;[$(getvar,userr4)+$(+,$(getvar,userr1),$(getvar,userr2))/18,sin(10*$(+,$(getvar,userr1),$(getvar,userr2)))];

The above macro makes use of USERR1 to USERR4 system variables. The USERR1 and USERR2 values are automatically set by the set/reset macro (given below). USERR3 holds the value for number of cycles created and USERR4 is for X axis lag value (See the sample image). Use the following macro to set/reset initial values. When you run this macro, just follow the status bar messages.

^C^C_setvar;userr1;-1;;userr2;1;userr3;1;_modemacro;Enter number of cycles:;userr3;\userr4;0;_modemacro;Enter lag value for X axis:;setvar;userr4;\_modemacro;.;

The following image illustrates three sine waves gererated with a cycle value of 3 and X axis lag value 0 (Red) .22 (Green) and .44(Yellow).

DIECAL - It's DIESEL Enhanced with a Mathematical Engine

In the last post I mentioned that I could come up with some better posts after the vacation, with the help of a refreshed mind. Hope this post justifies my words.

The absence of a strong mathematical engine inside DIESEL has troubled most of us in the past. We are going to overcome this limitation by mixing up DIESEL with the command line calculater. It should work in AutoCAD LT as command line calculator has been included in LT2009.If you compare, DIECAL capabilities are far better than DIESEL. Using DIECAL, you can do vector calculations, access various numeric functions which are not available in DIESEL and can do so many other things. If you are not convinced, here is a sample macro to draw a sphere by placing points across the surface of a sphere.

*^C^Csetvar;userr1;$M=$(+,$(getvar,userr1),$(getvar,userr4));$(if,$(>=,$(getvar,userr1),360),setvar;userr2;$
(+,$(getvar,userr2),$(getvar,userr5));setvar;userr1;0;)_Point;'CAL;[$(getvar,userr3)
<$(+,$(getvar,userr1),$(getvar,userr4))<$(getvar,userr2)];$(if,$(>,$(getvar,userr2),270),^c)

This macro uses USERR1 to USERR5 system variables to store values. The USERR1 and USERR2 system variable values are handled by the above macro. The USERR3 system variable stores the radius of the sphere, USERR4 holds the angle between the horizontal points and USERR5 holds the angle between vertical points. These values can be set/reset using the following macro. When you run this macro, just follow the instructions shown in the status bar.

^C^C_setvar;userr1;0;;userr2;90;_modemacro;Enter sphere radius:;userr3;\_modemacro;Enter angle between horizontal points:;userr4;\_modemacro;Enter angle between vertical points:;userr5;\_modemacro;.;

Please remember to run this macro to set/reset values before using the main macro.The first macro makes use of the Spherical Coordinate System point format entry to place points across the surface of the sphere.Please note that the CAL command has to be invoked transparently ('CAL) in the macro in order to output the result of calculation to the active command. It's my lack of knowledge in mathematics that prevents me from showing off a powerful application to exihibit the true potential of DIECAL. Those who know trigonometry and vector algebra will really enjoy this method. Following are some sample spheres made using different radius and angle values.

Point Sphere - 3D View

Point Sphere - Top View

Due to the presence of 3D elements, I am not quite sure whether the LT people can use the above macro. But they can surely develop a lot of advanced macros using DIECAL. To get an idea of things that can be done using DIECAL, refer to command line calculator section in AutoCAD help. Now even AutoCAD LT seems to be really unlimited. Doesn't it?

A Shortcut for Jumping over Words in AutoCAD

This method works fine almost everywhere in windows; be it a word processor, text editor or a dialog prompt. But I thought it would be really interesting to the AutoCAD people who normally deal with a lot of text in day to day life.

You can use CTRL + Right Arrow key to move to the next word or CTRL + Left Arrow key to move to the previous word while you are editing text inside AutoCAD. It successfully worked wherever I tried including Edit Text dialog box, Edit Attributes dialog box, MText Editor and Enhanced Attribute Editor. You can also use CTRL + Up/Down arrows to move to the beginning and end of a MText paragraph.

Thanks to Digital Inspiration for the tip. By the way, I am going back home on vacation for the next three weeks and might not be spending time in front of the computers during the period. Hope to post some good stuff after the trip with the help of a 'refreshed mind' ;-)

Wake up Dubai / U.A.E CADers....Shaan Hurely is coming to meet you...!!

Shaan Hurely is currently Platform Technology Evangelist for the AutoCAD & Platform Products as well as author of one of the most popular AutoCAD blogs, Between the Lines . Don't miss this oppertunity to grab his wealth of experience, knowledge and wisdom. He is available in Dubai on 26th of October. His visiting purpose in his own words;

"I will be presenting about AutoCAD and its future development as well as other topics in Istanbul Turkey, Kuwait, and Dubai in the next two weeks. I want to invite all AutoCAD customers in the region to the events or to possibly arrange for a private meeting at your office to discuss your use of AutoCAD and the future of AutoCAD. All events and meetings are free. This is not a sales presentation but focused on product use and technical topics. I am extremely excited to visit customers in these locations and honored to have been invited."

Unfortunately I miss the oppertunity to catch him as I will be back in India for my vacation. You can see the program details in his blog.

Welcome Aboard Shaan....!!