How do I render .JT files in THREE.js? I checked following options and could not get anything to proceed with:
checked in Three.js on different loaders which are available - didn't get loader for JT files. Please let me know if there is anything already present which I am missing in three.js.
http://www.johannes-raida.de/jnetcad.htm - if I have to write my own conversion method, at this of point, not sure how to proceed with. any pointer will be helpful
Any help or pointers will be appriciated.
Thanks in advance,
Pradeep
JNetCAD won't help you a huge amount unless you write it as a web service. Its Java (server side code) while three.js is client side. If you wanted to go down this route though, you could create a small RESTful web service that took a .JT file as input and returned the converted JSON. This does require a fair amount of Java knowledge though.
Unless you specifically need on-the-fly transformation, you're probably going to find it a lot easier to just run the .JT file through the tool yourself and work directly from a supported format. This is what they have done on the JNetCAD web page to good effect.
Related
I have an external site from which I want to download a zipped CSV file. Currently, I'm downloading it unzipped, saving it to disk, then unzipping it, saving the unzipped file to disk, then reading the unzipped file with the CSV reader. Lots of useless steps in the process can be trimmed out, and I went on my way to do so.
This amazing answer helped me to get myself going. I tried to use the first option linked there (GZIPInputStream), but I get a "Not GZIP format" error, so I suppose I have to go to the second option.
This is my current code, and it does what I want it to do:
(defn download-zipped-stream!
(:body (clj-http.client/get "www.example.com" {:as :stream})))
(with-open
[stream (ZipInputStream. download-zipped-stream!)]
(.getNextEntry stream)
(doall (clojure.data.csv/read-csv (clojure.java.io/reader stream) :separator \;)))
I literally got to this by trial and error. There are mainly three things I'd like to change / understand about this code.
Ideally, I would want to break my code in two parts: one to download and unzip the content, returning a stream - the reason being that I want to decide later whether I want to read it as a csv directly, or write to disk (I don't want to lose this option, because, during development, it is much easier to read a pre-downloaded csv file than downloading the big content every single time). Turns out that, if I try to access the stream outside of the with-open call, I get a "stream closed" error (which, from what I understand, makes total sense).
On the above code, I have to call this .getNextEntry, or I get an empty list. As someone who is striving to write functional code, this bothers me, because, from what I can understand, I'm dealing with states here - my stream object looks mutable, which is something I really don't want. Isn't there a way to work around this step and straight-up not have it there?
I tried to call the read-csv method directly on the stream object, but the read-csv doesn't really know how to handle ZipInputStreams, apparently. Seeing this, I simply and hopefully throwed an io/reader call in between, and it worked. I don't know if this is the best approach, though. Is it correct?
I'm quite new to Clojure, and I'm completely clueless about Java in general, so, as you can see, my knowledge about those stream objects is pretty limited. I tried to read something about it in Java, but I quitted because I was not sure about how much of it could be useful for someone learning Clojure, so any pointers are also appreciated.
I think you are on the right approach. Suggestions to consider:
Consider using wget to manually download the *.csv.gz file to your local disk. Then, just open that local file instead of using clj-http.client/get.
I haven't played much with ZipInputStream, but if using .getNextEntry() seems to be required, just go with it.
The examples for read-csv show using a Reader to give access to the input file, so this is the expected behavior.
This template project shows how I like to organize a Clojure project & source code. Be sure to peruse the list of documentation provided.
Don't forget to utilize cljdoc.org for looking up Clojure library API docs. For example, see the API docs for data.csv.
Update
You may also want to review this answer.
Use https://github.com/techascent/tech.ml.dataset optionally with https://scicloj.github.io/tablecloth/index.html (a dplyr like api for TMD)
Also has advantage of being extremely fast and able to handle datasets that can't fit in memory, talks SQL, Arrow, et. al. Join conversation about it here:
https://clojurians.zulipchat.com/#narrow/stream/151924-data-science/topic/tech.2Eml.2Edataset
I'm working on a project that uses parallel methods to convert text from one form to another. We're going to implement a CSV to JSON converter to demonstrate the speedups that are possible using our parallel framework.
We want to benchmark our converter once it's finished. What are the fastest libraries/stand-alone programs/etc out there that are capable of doing CSV-JSON conversion? I found a list of potential candidates here:Large CSV to JSON/Object in Node.js, but I'm not sure how fast the listed options are. In the worst case I'll benchmark them myself, but if someone already knows what the "best in class" converters are it'd save me some time.
Looks like the maintainer of csvtojson has developed a benchmark application. I think I can add my csv to json converter to his benchmark project to test my converter.
if your project can consider in-browser apps, I suggest csvtojson as it is by far the speediest converter on the market as of 2017.
I created it myself so I may be a bit biaised, but I specifically developed it for a bigger project that required big csv to json crunching.
Tell me if it served.
This question has been troubling me for the past week. Below, I will list my issue, and the research I have put into it.
The scenario: I was given a .csv file with 5000 rows and three columns. The three columns are defined as:
Site ID|Site Name|Site URL
My task: To create an HTML interface for the designers of the company to rate each site on a scale of 1-5.
My plan of action: I am a new hire. I am getting accustomed to the language I was hired for, which was Objective-C.
My algorithm for the project was to:
Parse the .csv
Remove the "Site Name" variable
Create a new .csv that contains the below variables: Site ID|Site URL|Rating|Image
Display the new .csv (with all aforementioned items) as an HTML page where there are toggles for "Ratings", which when pressed, will log the rating into the .csv which it was imported (or loaded) from.
The "Image" section I will be using a piece of software by the name of Paparazzi (on the Mac OS X operating system) which takes a fully formatted screenshot of the main page and saves it as a PNG file. I plan on using the file extension URL (which is stored locally) and load it into the "Image" column, thus when the designer clicks on the image, he is able to load the image that is stored locally.
My issue: As Objective-C is not entirely a scripting language, I am confused with some of the libraries I may need and/or methods I can implement this. I have the algorithm, but I am wholy unsure with the implementation.
My questions: If you have done a project similar to this before with Objective-C, what tips can you provide for me? How does one load the .csv as a HTML interface where upon edit, it will save this edit into the .csv? Will I need any servers for this, or is everything executable from just a machine? How do you grab an image (stored locally), extract its file extension, and load it onto the .csv?
The most important question: Is this achievable through Objective-C? My reasoning behind it is, I want to advance my knowledge of OC through a task like this. Yes, using Python is easier, but is it possible to do this with Objective-C?
Thank you.
It certainly is achievable, but I doubt you'd really want to go this way. If I understand it correctly, you want to serve the HTML page to others via web browser - that would mean either writing a (simple) http daemon, that would run on the server or writing a CGI script that would communicate with a standard http daemon. Python/PHP/Ruby do this for you readily, so there is much less room for possible errors.
As for
As Objective-C is not entirely a scripting language
I would perhaps rephrase it as
As Objective-C is entirely not a scripting language
Summary:
Are there good HTML5/javascript options for selectively reading chunks of data (let's say to be eventually converted to JSON) from a large local file?
Problem I am trying to solve:
Some existing program locally and outputs a ton of data. I want to provide a browser-based interactive viewer that will allow folks to browse through these results. I have control over how the data is written out. I can write it all out in one big file, but since it's quite large, I can't just read the whole thing in memory. Hence, I am looking for some kind of indexed or db-like access to this from my webapp.
Thoughts on solutions:
1. Brute-force: HTML5 FileReader API has a nice slice() method for random access. So I could write out some kind of an index in the beginning of the file, use it to look up positions of other stored objects, and read them whenever they're needed. I figured I'd ask if there are already javascript libraries that do something like this (or better) before trying to implement this ugly thing.
2. HTML5 local database. Essentially, I am looking for an analog of HTML5 openDatabase() call that would open (a read-only) connection to a database based on a user-specified local file. From what I understand, there's no way to specify a file with a pre-loaded database. Furthermore, even if there was such a hack, it's not clear whether the local file format would be the same across browsers. I've seen the phonegap solution that populates the browser local database from SQL statements. I can do that too, but the data I am talking about is quite large (5-10GB): it will take a while to load, and such duplication seems rather pointless.
HTML5 does not sound like the appropriate answer for your needs. HTML5's focus is on the client side, and based on your description you're asking a lot out of the browsers, most likely more than they can handle.
I would instead recommend you look at a server-based solution to deliver the desired goal/results to the client view, something like Splunk would be a good product to consider.
I'm trying to make something similar to this:
http://www.personalwine.com/catalog/label_designer_app.php?templateId=5046&action=4C92&userId=0
in Flash IDE with AS3.
My problem is how to save all objects on a stage, save it as a "template" and reuse it again - not as images, but as objects that can be editable again.
Could anyone point me to the right direction on how to solve this problem.
Thanks in advance!
Maybe a xml save/load function could help. Once one created something on save, all attributes of each object are written to a xml file. If you want to recreate, then you parse the info and build the screen.
Where?
You have two choices for saving data, you can either save it on the user's computer (client-side) or on your own server (server-side).
On the server
If you're going to use anything that is server-side related well, obviously you're going to need a server (and a database). Using php with mysql is both free and very fast for this sort of usage (small). You might also want to look into node.js since it will probably come very intuitively to an actionscript user since node is javascript and the syntax and structure of node.js files and actionscript files are very similar.
On the user's pc
If you just want to store the data on the user's computer, you can use a SharedObject, it will save all the data you need (variables and such) on the user's computer.
Here is a short nice tutorial on how to do so:
http://kirill-poletaev.blogspot.com/2010/07/how-to-save-local-data-with.html
Here is a much bigger and more detailed tutorial:
http://active.tutsplus.com/tutorials/actionscript/movieclip-reconstruction-with-the-sharedobject-class/
Basically you can do this for all the variables you want to save (movieclip locations, etc) and then load them. It is very straightforward, you can even store a whole movieclip object.