Trapezoid Transform Greyscale works in reverse

Forum|Forum|3 years ago
April 25, 2022
1 reply
336 views

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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Correct answer davescm

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

davescm

Correct answer

Community Expert

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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