AutoCAD 2010 :: Why Can't Use A Dimensional Constraint On A Knot In A Spline
Jan 23, 2012
why can't I snap to a knot on a spline when trying to use a dimensional constraint? I can snap any other geometric feature like a line or a dimension string to a knot. I can grab the knot (also seems to be in the same place as the "fit point", yes?) and move it around, so why, why, WHY can't I use a dimensional constraint? I really need to be able to control a spline's fit points with dimensional constraints, but I can't get at them exept to manually move them around.
public class DimConstraints{ [CommandMethod("Test")] public void Test() { Database db = HostApplicationServices.WorkingDatabase; using (Transaction trans = db.TransactionManager.StartTransaction()){ Circle circle = new Circle { Center = Point3d.Origin, Radius = 10 }; ObjectId modelId = SymbolUtilityServices.GetBlockModelSpaceId(db); BlockTableRecord model = (BlockTableRecord)modelId.GetObject(OpenMode.ForWrite); model.AppendEntity(circle); trans.AddNewlyCreatedDBObject(circle, true); AssocUtil.CreateRadialDimConstraint(circle.ObjectId, circle.StartPoint, circle.StartPoint); trans.Commit(); } }}
The above codes use the simplified .NET API for accessing AutoCAD parameters and constraints from: [URL] ....
The above codes can create a radial dimensional constraint. But the type of the dimensional constraint is annotational. How to change it to a dynamic constraint?
I have problem with animating camera along a spline using path constraint. The spline has been spline normalized before added to the path constraint. Then I add besier floating to be able to slow down the camera.
The final camera seems to move not smoothly. This can notice especially when the camera are further away from the origin (0,0).
Some says it's because of Max's coordinates is not fine enough which can clearly proved when import autocad file which located very far from the origin into max and most vertex will be shifted from where it should be in Autocad.
Is there a way to create a table to display parametric information -- either Dimensional Constraint Parameters or User Parameters? This can be done with Inventor but I haven't yet found a way to do this in AutoCAD. I've also considered Data Extraction but this doesn't seem to recognize parameters.
I'm an architecture student, trying to complicate my life a little bit more than required. I'm trying to make the next object in AutoCAD so I could "analyze" the form and its shadows with descriptive geometry later:
I'm pretty new to AutoCAD (I have the 2012 version) but I'm familiar with all the basic stuff since I've had some experience with SolidWorks. What I tried so far was to create a cube as a frame for my spline and then sweeping it with a rectangular shape.
I've been having trouble with the constraints in the intersecting points. I can't figure out the exact shape from the start and it makes it hard for me to play with the form later. I'm also having trouble to actually make it look like a knot.
When I am drawing using the "spline fit" I am unable to transfer my DXF to a laser,water-jet, CNC router etc... Is a spline any differnt than a "line? the yellow will show up on the machine, but the green isn't recognized.
I'm trying to make some 3d spline gears in autocad, I start by generating them in eMachineshop then importing into autocad, this works fine but the gear is imported as seperat lines so I can't extrude them, i also cant join the lines because after zooming in there are quite a few gaps. How I can join the lines together without manually connecting the dots? I'll include a copy of the gear, eMachineshop only outputs dxf files as far as i know.
Path array of a point on spline, I’m wondering why the path array of a particular point on the spline doesn’t force the points to lie on the spline itself!
I create a spline from a list of points and want to know where the curve of the spline changes to be able to dimension this point, it is not necessarily a point that is entered.
Is there a way to constrain a few objects to an attribute text box width? I want the background box and line to stretch, based on what is typed in that attribute box.
I know that if I make the attribute, a multi-line attribute, I can add a backgroud mask. I don't want to take this route, because the mask boundary varies, depending on what character is typed. Also, there is a gap between the mask and line I would like to maintain.
I tried some constraint stuff, but all I seem to be able to constrain is the insertion point of the text box, and not the width grip...
I am designing a vertical axis wind turbine just for some practice (just started using Inventor) and everything was going smoothly until I tried to "animate" it spinning. First, I set up a work plane that goes through the center of the structure, and then I clicked angle constraint "explicit reference vector." After watching several youtube videos, I figured that I should click on the work plane, click on another reference point, and then click another point that would be orthogonal to those two (right?). Well after I choose the first point, Inventor will only allow me to choose the center axis as the second option (which I think should be the third option).
I'm trying to create an external involute spline (ANSI B92.2M) Fillet Root Side Fit 26.9mm x 1 mm x 26 teeth x 38 mm long using the spline generator with Inventor 2012. I created a test shaft"M-182-AMA.ipt" that is Ø26.9 mm x 38 mm long with 1 mm radius on each end of shaft.
I use the following steps:
1. After creating component "M-182-AMA.ipt" I select Design tab>>Power Transmission>>Involute Spline. 2. A window appears that has the caption "Involute Splines Connection Generator".In the Dimensions section I choose "Splines Type: ANSI B92.2M - 37.5 deg, Fillet Root, Side Fit, 26 x 1.00 x 38 x 5H/5h" and change the Length to 38 mm. 3. In the Shaft Groove section I use Create new, and I push the Reference 1 button that turns blue, I then select the od feature from the model and I get an error(see attached pic "error1.jpg).
I changed the 26.9mm od to be 27mm and it still gave me the error.
Work Station : Dell Precision R5400 OS: Windows 7 Business 64 Version 6.1.7601 Service Pack 1 Build 7601 Processor Intel(R) Xeon(R) CPU E5405 @ 2.00GHz, 1995 Mhz, 4 Core(s), 4 Logical Processor(s) BIOS Version/Date Dell Inc. A10, 4/30/2012 Graphics Display Card: ATI FirePro V4800 (FireGL V) 1.00 GB Adapter RAM Computer Memory: 8 GB ECC RAM
I was wondering if the 8.5 x 11 dimensions change at all when going through an inkjet printer, and if so, how much. I suspect this is not a significant issue with scale accuracy, but wanted to be sure.
I'm working on a link between AutoCad and Excel. In order to complete the tasks at hand, I need the measurement units to be in a decimal form, and not the traditional feet and inches. Is there a way to set data extraction units separately from the regular dimensional styles? Or have you figured out a way to do this from the Excel side?
I have created an item made up of lines, circles and arcs. One side line distance will control all other sides, circles and arcs. I applied geometric constraints and then Dimensional constraints. D1 is the distance that will control all other objects. I have it working so that when I change D1, the sides adjust accordingly and the arcs and circles keep their geometry.
I was wondering if there is a way to add a range of distances for D1 so that if someone goes below the minimum value, nothing happens and if you go above the maximum value, nothing happens? I know if you make a block, you can make a list of distances for D1 to move. Is there a way to do this in the design drawing? Although, I don't just want a set range, I would like any distance between, say, 8 - 12 inches.
I tried to set some parameters in the Parameters Manager with no luck. Maybe there is an expression to use? Where would you find this expression if there is one?
I have a rectangle with a number of vertical gradients, what I would like is to add a gradient horizontally, to have the whole thing fade to white along the x-axis. Is there any way to do this?
I wish to create a scatter bubble chart where the position of the bubble is dependent on the values of the X and Y axis, the size of the bubble is dependent on a third data dimension and the colour of the bubble will vary according to another grouping type dimension. Is this possible under illustrator?
