I have already searched everywhere but those threads are about making rope-like objects.  I am trying to animate start and end values of a curve's geometry. But I want it to twist midway. I am trying  to rotate it's segment on Y axis as in the image but it is not working.    Here on the left is what I want to achieve and right is what I have. I tried rotating the segment/vertex on Y axis but its not working.
I have attached an image as an example below. I want to twist a rectangle. Do I have to convert that rectangle into a curve or into mesh and then twist it with ctrl+T?   Please explain with an example.
GDBus.Error when trying to enable second screen I connected an external screen to my laptop, but my desktop didn't automagically extend to it, as it used to do about a year ago (older version of Ubuntu).  I went to the display settings. The screen was listed there (correct resolution, brand name, etc.). But when i put the switch on 'on' and click 'apply', i get this error:   Failed to apply configuration: %s  GDBus.Error:org.freedesktop.DBus.Error.UnknownMethod: No such interface `org.gnome.SettingsDaemon.XRANDR_2' on object at path /org/gnome/SettingsDaemon/XRANDR   It's been like this for a few months now, but i'd really like to be able to use an external screen/beamer again.  Any ideas?  Thanks. Reprojecting vector layer in QGIS? I have a series of layers of lines (shapefiles) in My Project. The CRS of some are different and to merge them they all must have same CRS.  When I use Processing/Toolbox/Qgis_algorithims/Reproject_layer the reprojection only works if it is allowed to save to temporary file somewhere (it will not change the CRS when I reproject if I try to save and replace it in My Project directory);   I must remove the original from the layer list and reproject the temp file (without changing the CRS) to get it into my project and name it appropriately.  Is there a better way to reproject a layer in Qgis? Bug with Excavator Badge I edited this post today  on stack overflow. I was approved of the edit, so I waited a few minutes to get my  badge because this answer was posted on Jan 28 '10 at 1:06, but it never came. I have read multiple articles on meta that there have been bugs with this badge, but they have been about winning it multiple times (), or earning it then losing it (). Am I missing something here? Prevent direct access to a php include file I have a php file which I will be using as exclusively as an include. Therefore I would like to throw an error instead of executing it when it's accessed directly by typing in the URL instead of being included.  Basically I need to do a check as follows in the php file:  if ( $REQUEST_URL == $URL_OF_CURRENT_PAGE ) die ("Direct access not premitted");   Is there an easy way to do this? Is Switching the Neutral OK? What’s the worst that can happen if i put a switch in the neutral instead of the phase?   I just found out that 3 light bulbs sockets in my home  are connected this way, it first came to my mind to fix it but then I recalled the flow of current from positive to negative is just a convention since the electrons are charged negatively and they actually flow from N to L so i cant really find an solid excuse to mess with the wiring for the next 2 hrs When a 0-1-matrix with exactly two 1’s on each column and on each row is non-degenerated? [1] Let $A$ be an $n\times n$ matrix with entries in the set $\{0,1\}$ which has exactly two ones in each column and two ones in each row.  Give necessary and sufficient conditions for the rank of $A$ to be $n$. I'm from the State of Kuwait and hold an Eritrean passport. I'm planning to visit UK in October but my visa will expire in November.    Is it OK to make a journey in the last month of my visa, provided that I make sure that I book my plane back before expiring date? Comment authors are not getting migrated Why PlotStyle->Dashed make everything dashed? What is glue stretching? I had a question about dynamic vspaces () and there was a hint I should use a stretchable glue. Searching with Google didn't give me a helpful answer.  I would be glad, if someone can explain it and give me a simple example to understand how it works. Why doesn't the mirror modifier work with object groups? Why doesn't the mirror modifier work with object groups? I have a group made of four objects to which I want to apply a mirror modifier. For me, it's not working. What are the steps to make apply a mirror modifier to a group of objects? Where does the word "dog" come from? The speed of light as it approaches a massive body No matter how fast you go, you will aways perceive the speed of light as constant. Taking that as a fact, the special relativity theory was formulated. Now, for what I understand about general relativity, just by standing here on the surface of the planet under the effect of gravity, my frame of reference is a little different from someone in geostationary orbit, and time goes by a little slower for me.  So, considering me and someone in geostationary orbit, does both of us would perceive light at the same speed? If so, does that means that the light is slower down here than up there? Escaping both forward slash and back slash with sed Image a phone and browse on computer emulator? I have a galaxy nexus (stock OS). During its use I have used WeChat and WhatsApp, and would like to save my chat and voice histories within these programs.  Does a way exist to image my current phone as it is, so I can load it onto some PC emulator and browse these apps on my PC? This would allow me to save everything as it is, but also start fresh on my phone with a format. I do not want to format my phone then load back on WeChat for instance, yet I still want to be able to browse my old WeChat chats and voice clips (using a PC).  Thanks The limit to solve is $$\lim_{n\to\infty}\left(\frac{n^2+2}{2n^2+1}\right)^{n^2}$$ I tried to use L'Hôpital's rule but the derivatives are quite complex. I need to remove every line that has a value of 2 or less in the 8th field (column).   My data looks like this:  12-31   Airport 189 379 41  49.70946503 -124.91377258   2   2880    30.8 01-01   AlberniElementary   165 331 16  49.26100922 -124.80662537   4   5760    26.1 01-09   BamfieldMarine  161 323 23  48.83490372 -125.13572693   2   2875    27.4 01-10   BamfieldMarine  161 323 23  48.83490372 -125.13572693   3   3068    38.6   I understand that using awk I can strip off the values desired and print them to another file, and I understand that sed would edit the current file. In either case, I need to retain the original file.   Note: Please provide thorough explanations with your solutions. It is not suffice to just write the command, please annotate suggestions.   Further note: The data has a header line, so most likely solution will need to      awk 'FNR >1'   I suppose? Will wolves attack Ocelots? Will wolves attack and kill ocelots in Minecraft? I know they kill sheep. I just don't want my cats being eaten. How to evaluate the series $1+\frac34+\frac{3\cdot5}{4\cdot8}+\frac{3\cdot5\cdot7}{4\cdot8\cdot12}+\cdots$ Setting up a bicycle for someone with restricted knee articulation My father, now in his 70's, had a left knee replacement several years ago. He has limited movement in that knee - probably about 85 degrees on a good day. His knee can extend fully, but cannot bend as much as it should. As a result, he cannot pedal a bike he cannot get his left leg over the top of the pedal stroke.   He is desperate to get back onto a bike, he knows he won't be ripping up the road and winning races like the old days, but wants the freedom to go for a slow easy rides.    Does anyone have suggestions as to a solution to the problem. We don't mind spending money if we know the solution will work, but he can't afford to throw big money at wild ideas that may or may not work. If we find a solution, a new bike is likely.   We have access several mountain bikes in a range of sizes to trail ideas, and we have all the tools and skills to build bikes up from parts and rearrange things as needed.    EDIT: Thanks everyone - all great suggestions. What am am going to do is got tto the LBS and get hold of a cheap set of short cranks for around $30- probably from a kids bike, in the 120-150 size range, and see if he can ride that. Depending how he goes, I'll try a standard right crank and a short left crank. If all else fails, we will go for the Power Cranks   UPDATE: In case anyone else has similar problems. Got some 152mm cranks for $30. Set an old  mountain bike up with the seat as far back as possible. The old man is able to ride reasonably comfortably, now has a smile from ear to ear - any suggestions how to remove it - doesn't fit with the grumpy old man image :)   Has got me wondering how many people with minor knee problems would benefit from short(er) cranks.......