Keels rudders and layer selection/deleting

[simon whitehouse]

Hi, hopefully someone can help!

I’ve generally figured out most of the intricacies of using delftship (free version) fairly well i think- but there are a couple of things I can’t quite get my head round-

first- If i add a layer to the model, then later decide to remove it, how can I select just that layer? I can select individual control points and delete them one by one, but this is extremely time consuming, surely there must be a way to just delete an entire unwanted layer?

second- using the keel and rudder wizard, I can get the keel of the dimensions I want, and get it where I want it on the model no problem at all- but I can’t select any of the control points for the keel in profile view, whereas I can in any of the other three views. is this possible?

thanks in advance,

simon.

[MICHAEL KERR]

To delete layers, select the layer in Layer Properties and press Delete on your key board, you can delete water lines, buttocks etc the same way in the Intersect Box.
Dont know why you cant select control points in the Profile view ?

[Marven]

Perhaps you have set the profile view to shaded mode? You can only select points in wireframe mode.

[simon whitehouse]

Mike and Marven, thank you very much for your help, the answers were so simple I now almost feel a little silly asking the questions, I suppose as the old saying goes, it’s easy when you know how!

I do now have a couple of other keel related questions though, hopefully which don’t have quite such obvious answers!

I’ve read mike’s really clear description elsewhere on the forum on how to join a keel to a hull, and followed it carefully- but when I choose the option to find the intersection of two layers, the program doesn’t think there is an intersection between the bottom of the hull and the aft end of the keel, even though I’ve checked their measurements on the transverse axis are both 0.0 (on the centreline), and made the keel slightly longer than necessary (poking up inside the hull) to be trimmed off. this makes the shape of the keel go haywire when the top protrusion inside the hull is trimmed, because it doesn’t have the control point where the aft edge of the keel meets the hull. any ideas?

next question, could you please give me some pointers on where to start with modelling a torpedo shaped keel bulb to be imported as a part and added to the fin on my design?

Thanks again guys, the forum is really helpful!

simon.

[MICHAEL KERR]

Hi Anthem,
its a bit hard to work out what when wrong when you cant see it, when you pressed Intersect Layers, a box appears to see if you want the intersection in the keel or hull, I prefer the Keel myself because you will move the keel back and forth to balance the hull and create your Lead. Any way when you create the intersection curve it sometimes leaves out the beginning and the end part of your newly created Intersection curve and you have to join it up manually by clicking on the control points at the end of your new curve and the centre line of your keel, highlight them both and insert a new edge. Then turn the new intersection curve into a crease and then turn the old curve into a normal and then Remove the edge, use the remove icon on the bar (dont delete it). If that doesnt work you can send me your model and Ill have a look mike101@exemail.com.au

Bulbs you can download a bulb from the model database, go to Downloads and click on the model on the left and it will get you there, there is a model called Little America 9m, you can nick his bulb Save it as a part and import it into your model as a part and Scale it. Or you can do it the hard way which means your on your own,…………. well I told you it was hard.

Mike

[MICHAEL KERR]

In regard to my last post on keels, if the Intersection Curve didn’t form properly this is what to do next time. Before you create the Intersection Curve, with the keel protruding through the hull put a control point on the leading and aft edge of the keel where they intersect the hull. Use the alignment tool (Project Selected Points on a Straight line) so the edges are straight then create your Intersection Curve. The new curve will automatically connect to those two new control points and there will be no gaps along the curve.
Then turn your new Intersection Curve into a crease and turn the old curve at the top of the keel into a normal and then remove the old edge by Merging (don’t delete) then I straighten out the centreline using the alignment tool and there will be 2 redundant control points on the center line one towards the beginning and one towards the end that you can remove if you want.
Now all of this is pretty unless if you havnt aligned the LCG of the keel directly below the hulls LCB and you havnt got the correct Lead for the rig you are using.

[Eric Baxter]

Don’t you mean “remove top superfluous edge of keel by “collapsing” edges, not “merging” – which just puts two points on top of each other and leads to a “leak point” problem? Eric

[MICHAEL KERR]

To the best of my knowledge (which is limited and usually concentrated around my crouch) there is no button or routine called “collapse” the routine is called Merge. And yes! there is still some house keeping to be done, here a tweak, there a tweak, everywhere a tweak tweak.

[Eric Baxter]

Hi Mike, As I am desiring to post as correct a version of “Delftship for Dummies(like me)” help manual as posible I would really like to clear this up. I have the pro version in english without extensions. The word “merge” only shows up twice in my whole program: 1) “collapsing an edge by MERGING the two unconnected faces into one new face” button does the same thing as Edit-Edge-collapse, and 2) ” MERGE two selected edges by removing their common control point” button does the same thing as Edit-point-collapse. A third button: ” Copy values to other points” puts point(s) on top of each other, as I said,. It does not truely merge them. If you select that point in the future (without having first addressed the leak point /extra face issue-see leak points tutorial) and drag it you will separate the two “merged” points. Maybe we need Marven as an umpire here to prevent an internet fist fight. Its an awesome program; I am just trying to elucidate some of the quirks and fine points. Any comments in english or auf deutsch are welcome. Eric

[Marven]

Collapse should be the correct one, not merge.

[Eric Baxter]

Thanks Marven for claification and as always very fast. Eric

[MICHAEL KERR]

I stand corrected Eric, as a matter of fact, I’ve never used that collapse command before, didn’t even know it was there.

[otaku]

The nice thing about it not truly merging is that it remains possible to adjust the endpoints of lines of a surface or mesh when turning off other layers that share that coordinate.

[Author]

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