Trapezoid Transform Greyscale works in reverse

[NicolaJA]

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.

[davescm · Accepted solution]

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