I have a spline that goes through 4 points:-
x1,y1 - x2,y2 - x3,y3 - x4,y4
The spline is of degree 3 and is fixed at points x1, y1 and x4, y4.
What i need is the equation of the spline.
Is there anyway of calculating the equation that represents the spline?
How can I draw Spline with fit points in AutoCAD 2013 .NET API using my own jig?
View 5 Replies View RelatedI have a group of Points coming from a step.file. So I don't have their coordinates, excel list or anything else. Just the step file. Around 100 points. There is a line between each 2 consecutive points.
Is there any way to select all the points and create a complete spline? Or even to select all the points and create tangent arcs between all of them?
I need to be able to extract all "X" and "Y" axis points from a "spline" created in a 2D "sketch" and display them in the "Debug" window (for test only).
View 3 Replies View RelatedI am trying to create a 3d surface by importing points from an excel file. I have been using "import points" in the 3d sketch mode, and checked off the box that says "create 3d spline." But this just causes Inventor to freeze and crash. My excel file had about 2000 points, all of which lie on the surface I want to create in Inventor.
Should this method work in theory, and do I just have too many points?
I am working on a little lisp routine to draw splines, but can't get it working. The basic idea is that i first select a set of points that i can feed to my spline command.
(defun c:test2 () (setq pt (getpoint "
define point:")) (setq ptlist nil) (while (not (equal pt nil)) (setq ptlist (cons pt ptlist)) (setq pt (getpoint "
define point:")) ) )
Now i need to draw a spline based on these points. My plan whas to simply use the acad command itself. But this option didn't work.
(command "spline" ptlist "")
Then i tried using the vla-addspline command. But i can't even get this one working .
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 want to know if there is a command that passes all entities (lines, text, etc.) to a single layer, but that the institution holds the color and line style assigned according to the original layer that contained it.
View 2 Replies View RelatedSurfaceBody.GetExistingFacets( ToleranceIndex As Double, VertexCount As Long, FacetCount As Long, VertexCoordinates() As Double, NormalVectors() As Double, VertexIndices() As Long )
This works fine in VBA (Inventor 2014). But when I start using the same in VB.NET (VS 2012) all declaration as long shows as integer and fails on compiling. If I change to integer compile passes but fail on executing in Inventor 2014.
I'm trying to render some passes in Maya 2013 and Mental Ray using proxy assemblies. The trouble is that none of the passes that do some kind of material definition override ie AO, camera depth work correctly with proxies. I have read a few posts where people have said that these passes need to be applied in the render globals when exporting the proxy file. This method works correctly in Maya 2009 and fixes the issues, unfortuently this method does not work in Maya 2013.
View 1 Replies View RelatedI am attempting to move a project from Max9 to Max2011. Using Mental Ray.
Test renders of Diffuse, reflection,refraction, shadow, Self Illumination are failing.
The diffuse pass is very dark and looks like it still contains all the elements. But very dark.
The rest of the passes are just black.
I had this render working well in Max9. Perhaps something in the newer version of Mental Ray that I am missing?
I did some tests with just a simple scene. A plane, a box and a sphere. (1.48GB)
Render elements seem to work rather well if the scene is created in MAX2011. So it must be something in the Max9 files that is causing the error. ?
I have recently discovered what I think could possibly be a bug when using the OpenEXR format with Mental Ray passes and color management in Maya 2011 & 2012.
For example If I create a scene using the below steps:
1. Enable Color Management (default linear work-flow)
1. Create a sphere and assign a Maya material or a mia_material_x_passes shader to it (textured)
2. Add the sphere and light to the masterLayer or any custom layer.
4. Create a beauty pass, and associate with layer
3. Change the output image format to OpenEXR
4. Render and the color looks correct once a gamma correction of 2.2 is applied. See image attached goodColorSpace.jpg
However, If I add a (CGpost) pass to the same layer; for example a cameraDepth or Object Normal. The color space for the beauty and even the masterlayer passes are all washed out. See image attached badColorSpace.jpg
It seems that when using Color Management and combining (illumination) and (CGpost) Pass Groups in a single layer with OpenEXR is creating this outcome.
I should add that changing the frame buffer dose not work either, same result with 8bit Int --> 32bit Float.
I have attached 2 images which show that by simply combining a CPost (cameraDepth) pass with an Illumination (beauty) pass creates a very different looking color space.
I was wondering the best way to draw a circle that passes through an endpoint of a line and then is tangent to another circle above it? I need to create a radius of 3.5 between the two points.
View 9 Replies View Relatedhow math works for scale factoring to specfiy a smaller or larger inserted object. Working with a door. I want to set the door at 3'. To do so I need an X scale factor for 12.
The factors for factional inch scale is derived by multpying the denominator of the scale by 12. Then dividing by the numerator.
Example. If the scale for 1/4" = 1',0" is ( 4x 12) / 1 or 48/1.
Not sure if these figures below have anything to do with the scale Factoring problem at hand. But.
For 3/16" = 1'-0" scale the operation is (16 x 12) / =3, or 64.
For whole foot scales like 1" = 10', mutlpe the feet side of th equation by 12.
I'm just starting out with learning equation curves in Inventor.How can I get this curve
r(t)= ti + 4cos tj +9sin tk; where t is greater than or equal to 0
how to get this VBA as an equation curve
I need to make a model of saddle surface. The surface is given by equation z = y^2 - x^2, and I must have some thickness - It will be printed on 3D printer.
I have Inventor 2014 and I dont see possibility of making the surface directly in Inventor. Is there any trick for that?
I'm afraid I cannot use solution as stated here Equation-driven surface , because saddle surface looks like this hyperbolic paraboloid .
I tried this solution: I made 3D surface in Matlab, exported it in .stl and opened in Inventor - but this only makes the surface with no thickness. Functions extrude, loft require 2D sketch.
Can an equation be used to calculate equal distances when using the rectangular pattern.Regarding the attached .ipt file i would like to place 25 holes in the X direction with equal gap size between each hole.Also how to calculate the number of holes in the Y direction again with equal distance between each hole.I have not done this before with equations but was thinking that i would need to use the Length x Width in the equation.Do i need to add figures into the Parameters box also?
The attached file with the Hole feature the sketch is not constrained for the purpose of using an equation so i know how far from the start of the part to get equal distances between each hole to the end of the part .
I need to put the following into equation form to plug into a User Parameter:
if d91 falls in the range of 4" to 11"
then d92 = d91 + 2"
else d92 = 7.5"
Windows 7 Pro, SP1
Inventor 2012 SP1
Due to the nature of our business, I am not permitted to attach any files showing models or .idw environments of any actual work-related components.
how can i access the value in this column using vba?
View 1 Replies View RelatedI need to put in the polar equation r=e^theta. Is this even possible in autodesk? How can I do it? Should I spline through points instead?
View 4 Replies View RelatedHow to hide the frame that comes with the equation? I inserted an equation using the “equation editor”. What’s weird is that the equation is inserted with a frame around it! Is there a way to remove this frame?
View 6 Replies View RelatedI have a station equation in my alignment that happens to fall in a vertical curve in my profile. I'm using the PVC and PVT station and elevations from the plans and the K value to draw a Fixed Vertical Curve. It doesn't seem to be taking into consideration the station equation. It is calculating the wrong PVI station and elevation.
View 8 Replies View RelatedWe have some equations in our templates which i have modified with iLogic. Once the rule is run it only shows the value and not the equation. ie i want it to show Thickness*2 instead of just '12'. The ilogic will say something like InnerRad = Thickness * 2 Is there a way to make it show the equation rather than the value? While i know whats going and can see the driven link in the parameters the planned change to 2012 could take some getting used to for users.
View 9 Replies View RelatedI'm trying to figure out the best way to split an alignment so that I do not disturb the stationing of the alignment beyond a station equation. I have a very long alignment with a finaized design. I have a design change to make, which means I need to move a section of the alignment, and I want to do it without changing the stationing past a defined point so that it does not affect the design (corridor) past that point.
View 7 Replies View RelatedOkay so is there anyway to enter the whole equation of an ellipse into autocad and it will map it? ex x^2/a^2+y^2/b^2+z^2/c^2=1 with different values for x y z a b c. I want to generate different ellipses and then loft them together?I just want one the starts with the basics and goes all the way to the move advance stuff.
View 3 Replies View RelatedI was trying to use ipart to create some parts and place the relevant dimensions in the table format in the idw file. However, the equation for the dimensions appeared and I like to have it as numeric. Also, the feature present or absent is preferred to be called "Yes" and "No" instead of "Computed" and "Suppress" respectively.
View 1 Replies View RelatedI have an asssembly stack and I have a known bending moment at a given place (ie the datum). I want then to create a drawing of this stack up and show the bending moments at known locations beside the relative dimension.
Now I can do this manually no problem...but I would like this drawing to update automatically. ie the stack up height(s) change and i want the bending moment figure to update accordingly.l
Is there a way to do this with drawing dimensions? ie dimensions created in drawing mode?
I'm trying to use the equation curve to draw a super ellipse.The formula I'm trying to translate for inventor is the following.I'm guessing this should be possible using the abs() for the first section and an IF() statement for the second. The problem is Iäm not even getting the abs() to work at all. How to translate this formula?
View 1 Replies View RelatedTrying to do something as simple as y=x^3 (Explicit Mode). Set xmin = 10, xmax = 20 then tried y(x) = :
1in *(x^3) -- no good
(x^3)/1 in -- no good
(x/1 in)^3 -- no good
Error is that "Equation y(x) contains errors. Expected units are length".
The point here is: Why should typing in such a simple equation as y=x^3 be so difficult??? Can't even do (x*x*x)/1 in & make it work.
Can i make an Equation Curve such that it is dependent on a parameter from my Parameters list?
View 1 Replies View RelatedI have a small assembly with the parts. I'm doing an array (pattern) of one of the parts and I tried to do two things without success:
1. Tried to link one of the parts to the assembly itself with the equation tool ,but the software doesn't let me do it and says "...was rejected since it causes a cyclic dependency" - so what?:-) I know and need to do it!
2. After rejected the first choice, I tried to "project geometry" some stuff of the pattern I created in order to try and and make my connection in this way, but then I got a similar rejection: : problem encountered when doing cross part projection"...probably it's because it's from a pattern I'm creating from the part I'm doing this sketch inside?
What Can I do in order to bypass these remarks and make it somehow? Most important, Why can't one "tie" something from a part to its own assembly in which it's located???
Inventor 2012 Pro.
I7 workstation
