Is it possible to create a PAZ / Compound cell that will perforate a (compound) wall form vertically?
or
Is it possible to create a 3D "subtractive" perforator for complex geometry?
Currently if I draw a shape in plan to use as a perforator it does not seem to cut. Is it that only perforators drawn in elevation will work?
By default, perforators have never created openings in walls from a vertical orientation (or other angles). However, there is an undocumented variable (I know, I know) that does allow perforators to cut vertically: BB_PERFORATEALL. Set this to a value of 1, restart ABD, then move the object in order to regenerate the geometry. That should work.
Undocumented? Does that mean unsupported or just forgotten?
Thanks - I'll give that a go.
Good answer Tom (?)
My only other frustration with this was the inability to define the "Length" value of sense distance using a variable that could be modified during placement. I haven't tried it in a long while but I assume that hasn't changed.
Thanks Tom, I was aware of that info. My problem is when cutting "pockets" of different depths in the same paz cell. All depths get overridden by the single value stated in the datagroup catalog....
As Dennis days being able to set this (these) depths via a variable is not possible.
How important is the datagroup information to you? If it isn't important you could try importing the cell directly (keyin TFPACELL IMPORT) and move it into place to see if it works the way you expect. It will import at the origin.
This is also good way to test cells before putting them into the DG system.
I havent tried that, but isn't the whole point to go through the datgroup system and add that metadata. Doors and Windows placement tools only accept PAZ & PCF. Otherwise I might have just stuck with compound cells and lived with the huge amount of effort rebuilding those each time I needed a variation.
One thing I have used to create a variable depth pocket is to create a variable
and use it to control the movement of the perforator off the reference plane.
Most cells I have seen use a static perforator.
However,
If you set
Blind = False
Direction = 1
It tells the perforator to cut the entire form in the outward direction only.
This way you can use the variable to control how far into the form or wall
to locate the perforator and it will remove the part of wall from the perforator
to the front of the wall.
This concept can be used in combination with a bidirection rough opening perforator.
In this sceneio, it is useful to create an opening in a wall where you want two different size openings.
For instance, a window in a brick metal stud wall.
I would use the standard bi-directional rough opening perforator to cut all the wall through the wall.
Then set up a second perforator as discribed above with the height and width
set independently of the rough opening perforator
Maybe in this case, I would have created a variable (i.e. Masonry_Opening) to control the second
perforator height and width and set it 2" larger than the rough opening.
I then set my variable to the depth of the second perforator
to occur in the cavity between brick and metal stud wall.
The perforator will only remove the brick which is in front of the second perforator.
I now have room to place my wood trim.
HTH
Tom
Hi Tom,
Yes that is a shrewd move, but doesnt really work in the alternative vertical situation I was looking at previously in this thread. My "pockets" would be a vertical perforator cutting a complex shape from the foot of the door to the lintel, and then complex shapes cutting along the cill and lintel horizontally along the wall. ie not a simple puch through the wall.
Do you have a sketch of what you are trying to acheive?
For starters: A simple traditional wall construction (please don't laugh too hard at my detailing)
Compound wall = 102.5mm Brick + Void + 75mm Insulation + 140mm Block-work + 25mm Finish
I've assembled this example as a compound cell in this case because PCS is such a nightmare to use, and I get to show the multiple perforators needed to cut the wall leaves separate from the 3d Solids used to close the hole.
The reason for the 45 degree perforators is to make for a clean join in the brickwork and internal finish returns (for Perspective views and rendering)
I havn't created perforators that might accommodate sloping cills, or more complex lintels.
All of these perforators could be preplaced by just one or two if the problems discussed in this thread were addressed.
The brick and internal finish parts and families had to be hard coded in the cell.
Very cool.
You are correct that having control over depth of each cut would be important.
And I do dislike the way the placement Sense distance overrides the default
values of all the perforators during placement.
A variable defined perforator depths disassociated from sense distance
is definately what is needed.
And I do like your concept of subtractive 3d perforators.
Sounds like CR time to me.
CR submitted.