I want the a slope so that liquid can flow from point A to point B with a gradual slope along the two paths shown with yellow arrows, any ideas. the existing half drain was made by substracting a pipe from the exisitng polysurface.
Thanks Nathan but the point is only the depth should have a slope the width should remain the same. So we dont disturb the exisitng geometry and just replace the drain
I’m guessing you want to keep the bottom curve as consistent throughout as possible, just higher walls where necessary.
Assuming you still have the initial curve you used to create the pipe I’d:
ensure you get a closed curve - you can always add the sphere bit later
use Pipe command with the radius you want
run ChangeDegree, keeping the U to 3, but changing the V to 5 or 7 (I tested with 7). Important is that the number is odd, so you get a layer of control points right along the middle. ChangeDegree is also why we wanted to start with a closed curve - I found ChangeDegree doesn’t work with a non-closed curve.
Use POn for the pipe surface
5 Now you can tweak the bottom half of the control points on the surface
After that you can use the object in BooleanDifference as the cutter. Of course you should adjust for the spherical extra bit that you want in the lowest part.