H are automated by using them as an ActiveX, the C# script object fails on the simplest tasks. That is, when initiating Rhino and GH externally (as by the following C# code):
Rhino5Application rhino_app = new Rhino5Application();
dynamic grasshopper = newRhino.rhino_app.GetPlugInObject("b45a29b1-4343-4035-989e-044e8580d9cf", "00000000-0000-0000-0000-000000000000") as dynamic;
The following very simple C# script component fails because it cant cast its input:
The c# code at the component is only:
Line 89 is simply casting of the input. Clearly, this makes the usage of C# component, under automation, impossible which is a major loss.
As said, when initiating Rhino and GH manually , all works well as in the following:
Any ideas why it misbehaves under automation (as an Active X ) ?
I added the gh file of this example.…
oCommonSDK, I modified a working C# component that does something similar (ReduceMesh, written by Andrew Heumann). Both scripts are attached.
Aside from changing the component name and eliminating the P parameter, I made two modifications to the script:1) changed line 87 from private void RunScript(Mesh M, double P, ref object A) to: private void RunScript(Mesh M, ref object A)2) changed line 93 from: Rhino.RhinoApp.RunScript("_-ReduceMesh _ReductionPercentage " + Convert.ToString(P) + " _Enter", false); to: Rhino.RhinoApp.RunScript("_-MatchMeshEdge " + " _Enter", false);When I run the ReduceMesh component, the mesh object I feed it gets baked, the ReduceMesh command is run, the temporary object is deleted, and the reduced mesh result is returned. (Thanks, Andrew).When I run the MatchMeshEdge component, the mesh object I feed it is baked, the MatchMeshEdge command is run, but the temporary object is not deleted and no result is returned. The runtime error reads: "Sequence contains no elements (line 0)". I have a feeling that the command line string I am handing to RunScript is incomplete. When I enter it manually on the Rhino command line I see that it wants a mesh and three parameters. Of course I can hit Enter to accept the default values, but when you invoke a command through RunScript do you have to supply all parameters regardless? Also, where would I find details on the argument types that the command wants? For example, the last parameter reads "RatchetMode=On" or "RatchetMode=Off". How do I know if the type is Bool or the literal string "On" or "Off"?I am a complete novice at this so any help you can provide would be greatly appreciated! …
t 3D positions of ABCD you need the exact dimension of XX' and A'B'C'D' because the OX depends on both the scale of and distance to A'B'C'D'.
Try to scale A'B'C'D' relative to X' or move along XX'. Angle A'OC' and AOC respectively will change.
If you assume A'B'C'D' to be the viewing frame of a camera, XX' will be normal to the frame and you can derive the angle AOC from the FoV settings of the camera. If A'B'C'D' is a rectangle in space projected to a screen, then angle AOC is totally arbitrary.…
black (or RGB value) = A1, green = BB etc ...) and get to the end of a text file with Num. columns = Vmesh and Num. rows = Umesh.
1) there is a problem at the color transition (personally it's possible to even approximate the boundary color (like pixelate effect) to one of two adjacent colors.
2) text file.
I do not know if I was clear but one example for instance could be the one of the images converted to ASCII codes.
Thank you in advance!…
get some problems as when I try to change the number "II" for 2 the number "III" happens to become a 2 as it has those 2 characters also. There are a lot of varieties of numerals and the problem repeats with many other combinations, and I could go from longer and bigger strings to smaller ones but it´s a lot of work. I mean starting form the longest and bigger string and end with the smaller one.
I need to replace A for B but in the situation of AA not get BB but C.
:)…
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POSTS
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ike using something like the Z vector, but technically you can use any vector you want. This vector will actually determine the static rotatation of all the planes, so you can control that here if you like. One important thing that I've noticed is that the closer the vector is to the plane of the curve or if its too similar to one of the tangent vectors, the more likely you'll have "flipping"
2) Take the cross product between the tangent and the static vector. This will be your first perpendicular vector, which you can use for the X component of the plane.
3) Take the cross product between the tangent and the result of the previous cross product. Use this result as the Y component of the plane. All three components (X, Y, and Z (which is the tangent vector)) are all perpendicular to each other now.
After you've done that you should have planes that decrease twisting. If your curve is not planar, then there will always be some twisting in the frames, but it will be minimal enough to use them effectively.
There also may be "flipping" within the frames, which means one (or both) of two things. First, you could have planes that have reversed their vectors, so the X vector is properly oriented, but pointing down when it should be pointing up. Second, the X and Y vectors could have potentially swapped, so that Y "should" be X and X "should" be Y. In order to check these things, you'll need to do a few tests. The first one is find out whether the vector (X or Y) of the plane your testing is pointing in the opposite direction of previous vector. The second test is to find out whether the vector (X or Y) of the plane your testing is perpendicular to the previous vector. In both cases, an angle test between the two vectors will be able to tell you what you need to know, but you will likely NEVER get exactly 180 for an opposite test or 90 for a perpendicular test. That means that you have to choose a range with which to determine that a given vector is opposite or perpendicular.
You should start testing the X vector to see if anything is wrong. If you find that the X vector is fine, then just move on because Rhino will only allow you to create right handed planes, and the Z vector (the tangent) will always be the same.
I don't believe that there's a native function within the old dotNET SDK for calculating angles, so use the example at the link below. It basically takes the arcCosine of the Dot Product of the two vectors your testing to return the angle in Radians. I'm not sure if this function is included in RhinoCommon or not....
http://wiki.mcneel.com/developer/sdksamples/anglebetweenvectors…
ed when membrane cones are invited to the party (then mesh (via Starling is the best way) the brep and send data to Kangaroo : the easiest thing to do). But patch doesn't trim the inner Loops and ... well initially I thought to find this in SDK and do the job:
Well... I confess that I can't get the gist of the Brep.Trim (as explained in SDK).
Thus go to plan B: having already the closed breps (the "cones") as cutters ... attempt a Boolean difference
but this does that (this looks to me a bit paranoid, but some reason must exist):
What I want is this:
the code that mess things is (open the script inside definition attached):
BTW: where in SDK is that DeBrep thing?
BTW: Delaunay GH syntax is still cryptic to me (but this is not an issue anymore)
I would greatly appreciate any help on that final step (to greatness).
The full working definition soon (v5: with 90% of components replaced by C# stuff).
best, Peter
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bout angle since the exact same wires can suddenly start working fine later! Just adding new items to Rhino and then using undo to get back to your failing geometry will fix it sometimes?! Flipping the pair of curves' directions, either one or both, fixes it. It's just black box broken. It happens for really boring angles near 90 degrees.
Rotating the entire pair in space has no effect.
Rescaling the lines from their joint point has no effect.
Simply cutting and pasting the lines out of Rhino back in *sometimes* fixes it, so it's angle and something else that makes certain lines "toxic."
Duplicating the pair of failed lines via alt-dragging the Rhino gumball fails to fix it.
Running the "line-like curves" through a Line component to give "lines" doesn't fix it.
Re-creating the lines by extracting endpoints fails to fix it.
Each line, if separated from each other works fine.
Grafting makes each line into its own little cylinder minus a hub.
The error is the boilerplate "Object reference not set to an instance of an object."
Once the pair spontaneously starts working I cannot reproduce the error with that pair again, though sometimes Rhino undo will get me back to failing.
CAN ANYBODY REPRODUCE THIS WITH MY FILE? If so I can submit a bug report.
Exoskeleton is here: http://www.grasshopper3d.com/group/exoskeleton
Source code is here but it's for compiling, not something I can just test in a C# component out of the box:
https://github.com/davestasiuk/Exoskeleton2/commit/f63c4aa691a7f26b...
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s is like flattening your data PARTIALLY - chopping an index off the end of the branch paths without obliterating the tree entirely. When working with one "set" of input data, a flatten works to get these lists to match up - but when working with multiple sets, we need to be careful to preserve the original branch indices that keep all four of your original regions separate. As a rule, whenever you're feeding two data trees into any component, they should have the same number of branches. (or one should have branches and the other should be a flat list, in other cases).
The rule of thumb I tend to teach is this:
In 90% of cases...
For lists, all your inputs should either have 1 item or N items. That is to say, if you're feeding 4 items into one input and 9 items into another, something is probably wrong.
For trees, all your inputs should have either 1 branch or M branches. That is to say, if you're feeding a tree w/ branches {0;0} to {0;3} into one input, and a tree w branches {0;0;0} to {0;3;8} into the other input, something is probably wrong.
Grasshopper essentially matches up branches first, then lists second. By "matching" I mean it processes them together. Simple example of the Line component - it will match the first branch of points in the A input to the first branch of points in the B input, creating lines between those points, then match the second branches, the third branches, etc. THEN, it applies the same logic to the level of the list (with a pair of matched branches {0;2}, match all the items in those branches to each other - first item in one branch to the first item in the other branch, etc.)
This is a tricky concept but it seems like you're already well on your way to understanding it from your definition - "PShift" is a critical tool in your path management arsenal. I hope this (overly long) response helps clear things up for you!
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