AutoCAD Dynamic Blocks :: Constraint Stability - Rotation Parameter
Jan 22, 2012
I have been trying unsuccessfully for several days to achieve a stable setup for the attached. This is the closest I have been able to get so far but as you can see if you change the width then the rotation parameter, the stability of the block very quickly breaks down.
The problem seems to be associated with the move action which determines the center point of the angle parameter. It seems to only work properly when you change the width parameter and the rotate handle is in the 180deg. Any other position of the angle parameter results in incorrect alignment of the geometry.
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Aug 24, 2011
I've got a block that has a couple of rotation parameters. The main one works OK. But the secondary one that is incremental and only 180 doesn't. Everything looks OK but the objects don't rotate according to the parameter but 90 degrees from what I think it should.
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Mar 12, 2012
I have a dynamic block that I am trying to add some pretty basic functionality to (at least it seems like it should be simple!). Since I’m still relatively new to DB’s, I figured I’d give some background on what I’m trying to do, cause maybe it could be done with a much easier approach than I have come up with. So if you don’t feel like reading the details, see the fourth paragraph for my actual question.
The block is a sheet reference annotation (that shows: SheetNum/TotalNumOfSheets) that we typical put in the notes section of our construction drawings. It looks nice when the text (which are attributes), lines up with the text in the note (usually Mtext, but sometimes a Mleader). So I constantly find myself completing the tedious task of placing the block at the insert point of the Mtext (which is always justified LEFT TOP), and then calculating the distance down to line that I want the block to line up with.
So what I want the block to be able to do is to be able to have the user grab the block by its basepoint, place it at the insert point of the Mtext object, and just enter the text height of the Mtext note, the line space factor, and the target line of the note that the sheet reference block should line up (the input would all be done via custom block properties in the Properties Palette). And since we almost always use a text height of 0.125 and Line Space factor of 1, those will be the defaults, and really the only thing that would need to be entered would be the line number of the Mtext that the annontation should line up with.
I already figured out most of the constraint parameters necessary and calculated the offset equation using custom parameters. I have all the linework moving correctly using the vertical constraint parameters, however, I cannot figure out how to get the Attributes to move along with the linework. I know how to move text and attributes using Action Parameters, but I can’t do it with Constraint Parameters. So I figured that maybe I could chain an Action Parameter to the Constraint Parameter, but I couldn’t figure out how to do this either. Also, I am using visibity states and would like the visibility grip to move along with everything else as well.
My block is attached. I used some lines for the Constraint Parameters to be associated with, but they are only there for the block to operate correctly, therefore they are invisible in both of the visiblity states. Probably not the best way, but it works.
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Jan 9, 2013
Just exactly what does "Angle" represent when placing a "Rotation Parameter" in a DBlock?
I've tried a bunch of diff angles and haven't noticed a difference. I'm trying to figure out just what effect diff values would have. I thought that maybe when rotating the block instance, I'd only be able rotate it "so far" (270 degrees in the example I've shown). But it still went well beyond that.
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Dec 1, 2013
I need to use the dimension created by an action-parameter as a variable in a user defined function but AutoCAD will not allow me (see attached).
How may I access the action-parameter's dimension ?
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Sep 30, 2013
I am making a simple continuation block (attached) and I am trying to get it to have a rotation parameter along the polyline. I am able to do that, but the only issue is the flip parameter goes all weird when I do so (the text starts distancing itself from the polyline when stretched, rotated and flipped).
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Mar 22, 2013
So I've done a reasonable amount of work with dynamic blocks. I have a block with a rotation action and grip to arbitrarily align it. However I realized when trying to combine it with an alignment grip (which actions on the basic or fundamental block rotation angle) that there didn't seem to be a way to some how link a dynamic block rotation action or one of the custom angle properties to a the fundamental block rotation angle. Thus there are two additive rotations at work; the dynamic block one with its grip and the fundamental rotation property.
This can cause some confusion when one person aligns with the grip and another via rotating the block's fundamental property and would also be problematic in the generalized sense if one was trying to select or programmatically read back the net angle alignment.
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Jun 14, 2012
Is it possible to mirror a rotation within a dynamic block?
See the attached drawing. I am trying to have two rotations within a dynamic block, but only one grip. When the grip is rotated one half of the block rotates while the other half rotates in reverse. The resulting action would be much like the wings of a butterfly.
I have tried many different combinations of parameters, actions and constraints with no luck. The block in the attached file was as close as I could get. Have I reached the end of what AutoCAD is capable of?
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Jan 7, 2013
I have a block that I'm trying to convert for dynamic use.
In the first image, you'll see the items that I want to have rotatable in blue. The items in red should NOT rotate. That part seems to work fine. But the items that do rotate don't behave as expected.
I created the rotate parameter selecting the center of the red circle as the base point. Shouldn't that cause ALL the items to rotate about that center point?
As you'll see from the second image, the blue line rotates about some other point.
EDIT: Well I guess it only does it if I have the blue horizontal line defined with a length constraint. I also need to have that line dynamic--I need to make it longer/shorter.
I've attached a dwg file with the block in it--it's at the top of the block list (___SectMark2).
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May 25, 2010
Wondering if there was a way to have text maintain a rotation angle of 0 while being included in a rotation parameter. I am wanting the "N" for my North Arrow to follow the direction of the symbol of my viewport tag without the "N" character rotation angle changing with it.
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Oct 11, 2012
What is the variable to change the dynamic grip parameter size and color.
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Mar 6, 2013
I have an interior elevation callout block with four arrows, noting the N, S, E, W interior wall elevations. I trick I use to rotate Text while keeping the Text oriented in the upright position is to place a Point Parameter at the center of the text then set the "Chain Actions" to Yes. Then I use the Move Action to tie the text to the Point Parameter. Next step is to use a Rotation Action to select only the Point Parameter, which rotates the Point Parameter and brings the text along with it, keeping the text oriented in the upright reading position always. As an example, think about a viewport tag with a North arrow, and the letter "N" at the arrow tip. When you rotate the arrow, the "N" position rotates with the arrow's point but always is oriented upright.
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Jul 15, 2011
How do I manipulate a height parameter all of the dynamic blocks in the drawing from one single field? Say a field located in the drawing properties or on the drawing itself.
For example: Multiple blocks of different walls of same height with other blocks of things on located on those walls, dependant on the wall height, all linked to and changed by a single field. Possibly a Wall Height field located in the custom tab of the drawing properties.
I can pickout each of the blocks and change them at the same time in properites menu because they all share the same parameter name. I would just like to have that height parameter of every block in the drawing, that has that specific parameter controled by a single field. Which I could enter a new height at anytime that would change every block in the drawing to that height.
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Jun 12, 2013
I realize that i don't understand how to use constraints (specifically how to "fully constrain" entities) in my dynamic block.
attached is a sample of what i've got. (note the small circle at the insertion point that has 4 lines in it - i used these to base my angle constraints on)
upon inserting the first instance, everything behaves as i'd like. but once i stretch out the bubble, it seems to go back and automatically update the definition so that the next instance i insert is using the first instances dimension as the starting point.
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Nov 22, 2012
In the attached block, how can I contraints the red line to follow the end of the attribute text?
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Feb 6, 2013
I'm trying to create a window block with a grille. I've created the block and the horizontal grilles. What I'm having a hard time with is creating the vertical grilles. I would like to set up an array that would take the glass width, divide by 12, round up the value to get the number of vertical sections. Here's the code that I've figured out:
(W/(ceil(GW/12)))
W=Width
GW=Glass width
How do I set up an array with this formula?
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Dec 14, 2012
This is just a basic block to specify a section plane. What I would like to have is a BPT with 4 rotation options (0, 90 180, 270) that would rotate the whole block but it would keep the text upright and be able to stretch the ends of the arrows. I know I must be including/not including something important. Pointers on how to do this
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Nov 23, 2011
if it's possible to link a rotation with a stretching action. I have a text (or an attribute) inside a box that can be stretched. But if the box becomes too small to hold the text horizontally, I would like that the text automatically rotate vertically without any other action that stretching the box. If that is possible, is it also possible that instead of a text, there's an attribute, and that it rotates according to the attribute's length ?
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Jan 12, 2012
I have attached a drawing that I am trying to stretch two lines - one lengthen and one shorten as I rotate the connecting line.
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Nov 10, 2011
I need a rectangle block which on insertion prompts me for some data (name/tag/item number) and then displays it (this I can do). This is al pretty straightforward. But I also want to be able to fill in width and height and then have the block stretch to the correct size. So basically what I think I need is to have the value of a parameter refer to the value of an attribute. I've gotten it to work the other way around, where the attribute displays the size of one side of the rectangle (after stretching and regenerating), but I'd really like to have it working the other way.
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Aug 11, 2011
is it possible to have a label set to a parmeter so that after inserting a block I can see what each parameter is.
the label could just be there or show when the cursor is over the parameter symbol?
autocad 2007
windows 7
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Dec 17, 2012
What I'm trying to do is have a graphic scale with a set list of scales the user can pick from. This was easy using the Visibility Parameter.
However, I want to add a "custom" vis state where, once they select this option, the attributed definition box will pop up and give them the option to input whatever scale they are using.Check out the attached .dwg to see what I've done so far (I just have the attributes on the "custom" vis state).
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Aug 14, 2011
Is it possible to link a parameter value to a function? I want text or attributes to never be "upside down".
If it is rotated with a rotation parameter the text would need to be automatically flipped or rotated if the angle is less than say >3*PI / 4 and < 7*PI/8.
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Jun 17, 2011
Any way to change the order that the parameter properties appear in the property manager. Currently I think they are appearing in the order in which I placed them, but I would likr to re-arrange them.
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Nov 8, 2013
The "Main Stretch" parameter does not correspond with the Block Properties Table. What does this parameter need to be attached to?The paramter will adjust with the pull down options of the Block Properties Table.
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Aug 25, 2011
I am trying to create a block that has a stretch and array command, but I would also like to rotate each arrayed item indvidually. However I cannot select the rotate parameter as part of the array function, so the block end up only containing one rotate grip.
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Nov 14, 2011
I have 3 circles, randomly spaced. They will always be the same size. I want to resize them all about there centre points using just one parameter in the properties fly out. I've created individual linear/stretch for each circle, but I can't work out how to combine them.
AutoCAD 2012 Structural Detailing SP1 & Revit Structure 64bit
Win 7 64bit
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May 29, 2012
I've only got LT2008 at the moment, but this is a pet project that if my office upgrades me I want to finish.
Is it possible to rotate a line by using the length of a separate line? But the degrees of rotation need to be worked out by the length of the line
as in the following sum
angle of rotated line = (fixed number/360) * length of linear line
Left handed and PROUD
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May 6, 2013
I am trying to be able to have my outreach arm stretch horizontally and on angles of 5 / 10 / 15 degrees from the pole. I have been able to make the polar stretch for this and it works fine though what i am trying to do is have the luminaire height also stretch and move when the size of the outreach changes (i can make the linear dimension work the way i want though not the luminaire parameter) as when you add the paremter into the stretch action is only moves the top and leaves the bottom at the same location which is not giving me the correct height.
The block itself is alot more complicated then this I have stripped most of the parameters out to make it less confusing but the end result would allow the user to input the outreach angle, outreach length and luminaire height. I have attached drawing for your reference.
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Jul 21, 2011
I am very new to dynamic blocks. I am starting off learning the small stuff before I get to the larger more complex blocks to convert to dynamic.
I have a reference block I am trying to "master" all the functions we would like to see.
I have two major concerns.
1) Why can't I rotate this block (via rotate action) and have the attributes stay at angle zero? I thought I built the parameters and actions correct.
2) I haven't ran across anything that explains how to stretch 2 linear parameters at the same time with the same distance (ex: stretch both at .25, .5, .75)
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Jun 16, 2011
how (if) I can set up my dynamic blocks so that I can set the parameter values as I insert the block, rather than with the grips afterwards?
To take a simple example; I have a block consisting of a rectangle, with 2 linear stretch parameters - length, width. Can I set it up so that when I insert the block, it asks for the length and breadth,just as it would for attributes.
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