Layer Transparency assistance

[andyb57J]

The attached piece of hatch set the transparency as 30%.  What is the code for 10% transparency.  I have tried to work it out using AI but when I ask for 10% it gives a transparency of 86%.

(entmod (append (entget (tblobjname "layer" lay)) '((-3("AcCmTransparency" (1071 . 33554610))))))

 

[Saxlle]

Hey @andyb57J,

 

I don't have an answer for value of 10% or either for the value "33554610" which present the 30%, why is it so. I know this is for the Hatching closed polylines from your last topic where I helped you, but I have question: Do you need a transparency for the layer or for the hatch?

 

There is a system variable HPTRANSPARENCY which is meant for sets the default transparency for new hatches and fills in the current drawing.

 

The basic formula for calculating percents for hatching is: ((percent/100) * 90). So, if you want a 10% transparency, when use HPTRANSPARENCY you need to put 9. This will set for all new hatches to be at 10% of transparency.

 

If you need the layer transparency, then replace the next code to avoid that number "33554610" with:

;; OLD
(setq lay (strcat "SHG_Hatch_(FD)_" layx))
(command "layer" "new" lay "")
(command "layer" "color" "truecolor" col lay "")
(command "LAYER" "SET" lay "")
(command "color" "bylayer")
(entmod (append (entget (tblobjname "layer" lay)) '((-3("AcCmTransparency" (1071 . 33554610))))))

;; NEW
(setq lay (strcat "SHG_Hatch_(FD)_" layx))
(command "layer" "new" lay "")
(command "layer" "color" "truecolor" col lay "")
(command "LAYER" "SET" lay "")
(command "color" "bylayer")
(command "layer" "tr" 9 lay "")

 

Best regards

Edited May 16 by Saxlle

[andyb57J]

2 hours ago, Saxlle said:

Hey @andyb57J,

 

I don't have an answer for value of 10% or either for the value "33554610" which present the 30%, why is it so. I know this is for the Hatching closed polylines from your last topic where I helped you, but I have question: Do you need a transparency for the layer or for the hatch?

 

There is a system variable HPTRANSPARENCY which is meant for sets the default transparency for new hatches and fills in the current drawing.

 

The basic formula for calculating percents for hatching is: ((percent/100) * 90). So, if you want a 10% transparency, when use HPTRANSPARENCY you need to put 9. This will set for all new hatches to be at 10% of transparency.

 

If you need the layer transparency, then replace the next code to avoid that number "33554610" with:

;; OLD
(setq lay (strcat "SHG_Hatch_(FD)_" layx))
(command "layer" "new" lay "")
(command "layer" "color" "truecolor" col lay "")
(command "LAYER" "SET" lay "")
(command "color" "bylayer")
(entmod (append (entget (tblobjname "layer" lay)) '((-3("AcCmTransparency" (1071 . 33554610))))))

;; NEW
(setq lay (strcat "SHG_Hatch_(FD)_" layx))
(command "layer" "new" lay "")
(command "layer" "color" "truecolor" col lay "")
(command "LAYER" "SET" lay "")
(command "color" "bylayer")
(command "layer" "tr" 9 lay "")

 

Best regards

The transparency is for the hatch but in each case the hatch is on its layer.  The new code works perfect except "tr" 9 gives me a 9% transparency.  10 is 10% , 30 is 30% etc.

 

 

Agai thankyou for everything.

[Saxlle]

No no, just to clarify. If you want to 10% of transparency you will need to enter 9 ((10/100) * 90), where the 10 is the desired percentage which you want and the 90 is the total amount of transparency which can be inputed. The 90 is equal to 100%.

Edited May 16 by Saxlle

[Steven P]

Try this, you might need to sign up to The Swam

 

 

https://www.theswamp.org/index.php?topic=52473.msg574001#msg574001

[ronjonp]

@andyb57J Another way to get the value is to set the transparency to what you want on layer 0 then dump the properties:

(entget (TBLOBJNAME "layer" "0") '("*"))
;; 10% transparency
;; ("AcCmTransparency" (1071 . 33554661))

 

[andyb57J]

11 hours ago, Saxlle said:

No no, just to clarify. If you want to 10% of transparency you will need to enter 9 ((10/100) * 90), where the 10 is the desired percentage which you want and the 90 is the total amount of transparency which can be inputed. The 90 is equal to 100%.

Ok sorry I now understand your code.  if I want 10% transparency the value is 9.  I was thinking that the value was actually the percentage i.e. 9 was 9% and 10 was 10%.

 

I would have a lot of difficulty in getting other users to familiarize with this so Ill will just use the values rather then a percentage.

 

Thankyou again.