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Trapezoid Transform Greyscale works in reverse

New Here ,
Apr 24, 2022 Apr 24, 2022

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Hi, I am using the Trapezoid Transform Geryscale node to expand the top of a shape. When I increase the Top Stretch parameter (positive number direction) the shape top reduce in stretch. I had to use a negative number to increase the stretch. It seems to me working in reverse. I am new to Designer to i might be wrong somewhere.

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General , Substance Graph

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correct answers 1 Correct answer

Community Expert , Apr 25, 2022 Apr 25, 2022

You are right, it does squash with a positive number.

 

You can get around that though by either of the following three methods (depending on how comfortable you are with Designer)

 

a. Just type a negative number into the stretch value

 

or

 

b. Control the value with a function and use that function to invert it

 

or

 

c. Open a reference copy of the node

    Save a copy of the node e.g save as Trapezoid_transform_edited

    Open the copy and edit the function graph of the pixel processor with

...

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Community Expert ,
Apr 25, 2022 Apr 25, 2022

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You are right, it does squash with a positive number.

 

You can get around that though by either of the following three methods (depending on how comfortable you are with Designer)

 

a. Just type a negative number into the stretch value

 

or

 

b. Control the value with a function and use that function to invert it

 

or

 

c. Open a reference copy of the node

    Save a copy of the node e.g save as Trapezoid_transform_edited

    Open the copy and edit the function graph of the pixel processor within it

    Change the float value at the top left from 1 to -1

    Save the edited package

 

Dave

   

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