Im trying to make a 3d model of a site in AutoCAD and it seems lofting between some contours is impossible, this is driving me insane, first it told me there was a U and V derivative problem so i loft the surfaces that i could but now there is a gap where it refuses to loft and i cannot create a surface in that gap using network or blend or pach.
View 3 RepliesSome background: We have a composite surface of existing surveyed contours as a TIN pasted into existing aerial contours that we received from a client. We used polylines to generate our proposed contours, and then generated a proposed surface from that. We've made a blank surface, pasted in the existing surface, and are trying to paste in our proposed surface... only the existing contours outside of the proposed suface no longer line up correctly once we do.
We've tried applying the method laid out here: [URL] ........ (and the link referenced in the bottom) but are still having trouble getting the surface to work. We've tried offsetting as little as 0.25' and as much as 5' with the feature line draped over the existing surface, but it seemed that the greater the offset, the greater the discrepancy.
Just to make sure we even tried that correctly - should the breaklines that we add be standard or non-destructive? (I've tried it both ways with little success either way, so I don't know if it matters much in this instance, but perhaps for future reference it would work.)
I've attached a screen shot of our surfaces. The pink and green lines are the proposed contours, the white dashed are the existing. The outer red line is offset 0.25'. As I've mentioned, we've tried offsetting various amounts with decreasing success.
I have to do a lot of lofting to create 3D shapes. The more the 2D sections are complicated, the more times takes for AutoCad to find a solution (even in a powerful computer). Beside that, I use Guide splines to create the exact shape I want. For this I have to wait two times, first Autocad find its own solution, then the solution with my Guides. Is there a way to make AutoCad loft by default with Guides, such that it doesn't ask for Guides after the initial loft, but immediately at the beginning.
View 3 Replies View Relatedwhat would be the procedure for creating a loft around a coiled path? is there a way to make the coil command create a path.
inventor 2014
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I'm trying to loft a base for a light fixture. It's narrowest at the top and bottom, and its widest point is in the middle. classic design.
Can I upload a pdf? I assume if it's available to everyone via a search engine, wouldn't it be ok to upload it? Any thoughts?
I digress. I'm trying to look at the circles from the side, so they form horizontal lines. I thought they'd be easier to offset a distance to.
I tried changing my views around to achieve that effect, but to no avail. UCS is World view. Or View.
One of the images in the .pdf, is of the appearance I'm after in a front view. So that way, I could do an offset distance of one inch, but as things stand now, that wouldn't work either.
It wouldn't work in this view projection, I think was what the wording was; or close to it.
The only view I was able to do any offsets in was the Top view IIRC, but that just gave me a bunch of concentric circles with no height. At least they were offset.
I want to loft the surface, made of polylines.The problem is that, when I select all the splines, and then do Draw-> Modeling -> Loft then I chose the "Cross-section only", this what kind of message I get in command box:
The selected entities are not valid.
Here the .dwg file with the mentioned splines in it:
[URL]
Basically we are trying to make a 3D plate (in this case a 2" thick piece of steel) and have a 3D hollow shape inside. Its split into Top and bottom, as shown as the below picture.
top View (plate 1).jpg
I have tried the loft command (which I just learned off within the past hour or so) and it indeed works. But I wish to use its as the opposite, where the middle is hollow and the rest is a solid object.
Side View (plate 1).jpg
I have tried the loft command (which I just learned off within the past hour or so) and it indeed works. But for the life of me does not know how to get it as one big object with the middle shape hollow. Am i missing a step or is it another command completely?
Also, once the object has been created, I want to split the object on its X axis mulitple times, almost like an exploded view. Each split will have its own set of top and bottom orifices which will represent multiple plates.
Is there a way to do that? Also is there a way to gain and separate the top and bottoms of these newly split plates?
Here is the drawing file as well to work on -> 3D-MK1.dwg
In previous autocad version that supported Lofting, i was always able to create a solid loft.
With 2013 the loft command seems to divide its abilities depending on what type of profiles are selected.
When selecting a closed polyline profile, loft produces a solid. Works fine.
When selecting a region or solid face loft produces only a surface.
The work i am trying to do at the moment involves irregular sections and/created from existing solids.
I could trace the profile and make a polyline, but each profile contains an ellipse, and you cant trace an ellipse.
Where i used to be able to select the ends of the existing solids and create a solid loft,
I now have to produce a section twice (gives you a region), loft the regions, convert the regions to surfaces (because the produced surface doesn't have and faces), union the surface and then convert to solids
Instead of 1 command there are now 6.
I tried turning of the assiciativity (surfaceassociativity 0) hoping that it had some sort of influence but to no avail.
There was no issue with 2010 and 2012 and i have just installed all 2013 products.
I have a lot of work to do and have to produce 3dsolids.
I am working on creating a male mold for a canoe. I first designed the cross sections for the canoe and then began converting them to the mold cross sections. When I try to loft the cross sections I have converted so far, they all loft as I intended until I get to the rear of the canoe (sketch 8). The issue typically arises in gunwale section (the part that appears to be a notch in the sides). Everytime I loft, one of the gunwales splits/twists in an undesired fashion (in the image below the right gunwale is incorrectly twisted).
I do not understand why this is happening for a few reason:
1. The canoe cross sections lofted as planned, and I only added simple boxy shapes to those cross sections.
2. Each cross section is symmetrical (or at least from what I can tell they are).
3. The cross sections that are lofting improperly all have the same number of segments and are in very similar shapes.
I have attached the file of the cross sections and another file of an improper loft.
Coming from Sketch up to real big boy tools. I watched the tutorial videos and tried poking around a bit for this specific answer but came up a bit short.
What I'm trying to do is loft a face to a point. Easy enough. I've got my point established on an offset work plane, and I can just loft to that, however, I get nothing but straight lines. (First attachment)
An example of the ideal outcome in SketchUp is the second attachment.
I'm having the most difficulty trying to draw the curves along which I want the face to be lofted because, even as I sketch along my 2D plane, I can't snap the endpoints of my arcs to the endpoints of the face (or the point to which they'll all connect).
If you can create a solid by lofting between two section, in this case they are 3d polylines, along a given path. The path is at the top of the sections. Using the loft command I have to key in the PO ( point ) option several times to get the path option to show then when I select the path it gets treated as another section. See attached.
View 8 Replies View RelatedSuccessfully drawn a eggshape for tabletop using 3 ellipse and arcs and converted these into polylines but having trouble converting them all into 1 polyline for lofting.
View 8 Replies View RelatedWhich program is used now days to create a ships hull lines plan? In the old days it was done on the floor or board drafting.
If I have a unique curved bow, which software is used to create the lines plan.
what determines the way the surface is created when lofting. I am creating a shape and a path but i cant seem to get them surface to follow the path. It always gets creating in a different axis. Is there a way to control that?
Here is an image it should be following the line i made
I have 3 scientific waveforms, made into splines , from X,Y and Z data. Basically 3 long wiggly lines.
I wish to visualise the data by modulating a spheres surface in 3 dimensions so that the X data creates wave on the surface of the sphere running along the x-axis , the Y data along the Y axis and the Z along the Z axis. All the data (splines) will interfere and modulate with each other across the surface.
I have spent a couple of days looking at nurbs and lofting but cannot even get close to this. They all only allow splines in 2 dimensions to interact and nurbs cannot cope with the data volume anyway.
ps i can obviously extrude the 1d data or lathe the data but each only makes 1 or 2d surface interaction. The attatched pic is each one of the data splines made into a sphere using a 180 bend and lathe. This isnt exactly how id ideally have it. I need all three joined into one shape.
I have spent some time over the last few days attempting to create a boat hull by lofting sections along a line representing the center line of the hull, but I'm not having much luck. The shape that is created appears to be rotated some weird way, and I just can't seem to get a handle on what is going on. The section splines were created in the Front view, the path was created in the Top view. The section shapes were then placed in the Left view to correspond to their location along the hull.
My question is this: where can I find a tutorial that deals with boat hulls and lofting specifically, or failing that.
It's new to me the loft compound object, and I found it a little cumbersome.Provided the shape objects have the same amount of vertices, the loft should do its business, is it?
View 6 Replies View RelatedBasically I am following a tutorial which says that when you create a loft from a path and two shapes, the loft should still be linked to the shapes, so if you resize one, the loft would change, but that is not happening for me. I am using 2014 so I don't know if this feature has changed, or if you access it in a different way?
View 6 Replies View RelatedI'm trying to make a simple race track for my uni project. I've created the track's path using lines and arcs, and attached them all together into one single path.
[URL]
I'm then trying to extrude the track geometry (a simple rectangle) along the path of the track (see the bottom image).
I'm following a tutorial that says to select the line, then under compound objects select loft. Then under creation method I should chose "Get shape" and select the rectangle, however I'm unable to click on "get shape", the option is greyed out.
Autodesk 3DS Max 2012 Student Version
I have a few points within an area of 2m x 2m and I will like to create contour lines. At the moment I can only produce models with shade difference.
Thge contour command does not accept sub 1 metre accuracy (putting 0.1m does not work).
Is there something I can do?
I create a contour layer from a DEM raster and everytime it comes out about 700' offset from the DEM.
View 8 Replies View Relatedi'm exporting a surface from 2013 to be used in 2010 for presentation. works great but the contour interval is not the same as the surface i'm exporting. working in 5/25 contours...xml import comes in with 2/10 contours. looked for a setting but can't seem to find.
View 2 Replies View RelatedI'm drawing a topo and trying to figure out a way to manually smooth out my contours. I'm not talking about the little jagged edges that you can remove if you use the smooth surface option under surface properties but the big ugly looking jumps you see when contouring a relatively flat lot. In the ancient version of AutoCAD my company used the contours came in almost like splines and you could move the vertices around to make them look good. I know you can go in and delete some TIN lines and edit point elevations but that is very time consuming and I'm hoping there is a quicker way.
I know I can extract them into polylines but there are too many little segments to be useful. I've seen the SIMPLIFY SURFACE option and while that takes away some of the roughness it creates some as well. Is there some better option than extracting and then drawing a spline between the parts I want to smooth out? These contours don't need to be 100% accurate, I just need them to look simple, like if someone was drawing them by hand.
I have added contours to my surface (the blue lines). For some reason the surface generated contour (the orange line) is jumping across the contours I've added.
View 8 Replies View RelatedWhen exporting 3D contours, what property do you use to export the elevation to attribute data in the shapefile?
View 2 Replies View RelatedMy TIN surface either did not generate contours or did not display them on my drawing. I created and tried surface styles of many contour intervals(from 0.5' and 4' to 2' and 10') without success. I made sure my contour layers on both the Style Dialog box Display Tab and Layer Properties Manager were turned on, still no success.
View 6 Replies View RelatedI'm having problems contouring in C3D 2014.
I'm using the command PL - polyline to create my break lines (Centerlines, top and bottom of curb)?.
In this particular drawing the first point I click on is carrying the elevation throughout the entire length and yielding bad contours.
Essentially the bottom of curb on each side of the street should be the same elevation with a crown at the centerline.
Instead the elevations are about five feet different because the beginning point is around the corne at a point of tangency on a hill.
This has not happened in any other drawings and I've done them the same way.
I redid the breaklines with the 3DPOLY command and aside from a few minor edits the surface came out OK.
I've been reading about 3DPOLY command but have not found out too much about what the actual difference is between 3DPOLY and PL commands.
Seems like 3DPOLY is the way to go.
I do not have too much experience with C3D 2014 and am making a huge jump from 2004 LDD. How to build 3D surfaces/contouring.
I'm trying to label elevations on some large contours.
The problem i'm having is that 'multi line' does not give me enough elevations, while 'advanced placement' gives far to many elevations for mapping and plotting purposes. Is there a way to have more control on how Map labels contours?
How to draw contours in Autocad 2010 LT? Is it possible without eagle point?
View 3 Replies View RelatedWhen I generating contour(surface) using Civil 3D it gives very complicated contours.Some times those contours cuts each other and have very strange shape.
I used to use SURFER software to generate contours.It gives simple contours.But I like to use Civil 3D because.
I attached SURFER contours and Civil 3D contours. I also attached AutoCAD file those who using older versing of Civil 3D.
I know how to smooth contours in Civil 3D but it does not solve my problem. You may say "You should use commands like swap edge,delete line .
I want to color fill between contour lines. Most of the plug-ins I have tried only color the actual contour lines. Some of the large stand-alone packages say that they do it, however most are beyond my maker financial reach.
So my queries are: can this be done within any AutoCAD package? Are there any known plug-ins that can do this?
Or will I have to commission a customized plug-in. The image below is an example of the color fill required.
DH Colored Cont Image of 001.jpg