Re: transom and deck

DELFTship forum Hull modeling transom and deck Re: transom and deck

John R. Coil

If I read you right what you need to do is insert an edge at the intersection of your layers.

You can do this by selecting Edit > Points > Intersect Layers.

The pop up will ask you which layer you want to put new control points into and which layer you want to use as basis for those points. When it does so it will tend to insert the control points you need but if you’ve used different layers for different parts of the hull (like having the “hull” and “deck” is separate layers) some lines may be left out that need to be manually inserted. Ditto for where these new details join to the centerline of your model.

Once that is done you should have something to see.

One thing I have learned by trial and error is that if there is no intersecting edge to intersect the program doesn’t generate any detail there. Since the surface you are using for your transom may lack control edges exactly where it passes through the hull to the extreme left and right of same this may result in alack of usable detail.

At this point you can do two things. The first, which is probably easiest, is to make sure you’ve got all the CPs you need for your transom on your hull and then, rather than making new matching detail by copying CPs on the hull to the curved surface (which is the other option), create a new face spanning the CPs for the transom in the hull by selecting all the CPs one to the next and then using EDIT > FACE > NEW. When you do this you’ll have to re-crease your edges and re-check any corner boxes that may have become unchecked. Also, since the new face is curved it would be a good idea to span it with control edges.

I hope that helps.

Aside: one thing you may want to play around with later is WHERE you put those creases on your hull. I’ve discovered doing this can create some interesting and desirable effects. For instance the only difference between these two transoms:


… and …


Is where the creases have been placed. On the first version they are at the transom control edges itself and the result is sharp edges. With the second version you can see the where I’ve placed the creases as black lines — back 1 level deep into the model — and the result is that smoothed shape. Considering that this particular critter is a sort of hybrid between an oversized kayak and a skiff for sailing (one with delusions of grandeur) the latter looks promising to me.

… that it’s small enough that I might even be able to afford to build it at some point … well that’s another matter….