I am developing an application to show students various different of algorithms in action on graphs.
In order to achieve the results I was working with networkx, but did not manage to find a good way to render the graph I am working on dyamically displaying colorcoded changes, such as the next node being considered.
I was looking into mathplotlib, but most of the functions handling interactive plotting seem pretty deprecated.
Do you know of any good alternative that, ideally might even be embedded into something like pyqt?
Thanks!
Related
I'd like to be able to produce PDF files in NodeJS.
Currently, we use puppeteer. We need to produce highly designed documents and so puppeteer/chromium gives me the ability to create a complex layout in HTML with the added benefit of also having the HTML version of the file.
It's great for relatively small documents where design is key.
The problem is when I try to produce long report documents. These documents do not require elaborate design. These are pretty much just a header with some information, and then a simple table with lots of records that stretch far as the eye can see, so they tend to be large. Like, really really large.
When I try using puppeteer for that, well pretty much just crashes and burns because loading such huge layouts into the underlying browser is just too much.
Currently I do "stitching". I create the document by having puppeteer create the doc in parts, and then I connect all those "doclets" into one using PDFKit.
But then I have problems like when one "doclet" ends and a new one begins, there are blank lines. (partially empty pages for no good reason from the perspective of a customer viewing it)
What I'm looking for is a library that has basic layout functionality but that doesn't use a browser (or perhaps uses something lightweight).
Problem is that libraries like PDFkit and pdf-lib seem to be too low level.
I'm going to literally have to "draw" the documents by telling it where exactly the text should be.
If I want tables, I'm going to straight up have to draw rectangles and stuff.
Having to create all of this manually would be a nightmare.
All I want is the ability to create simple layouts (tables, titles, text wrapping, background color) without having to use a library that just launches chromium.
Please, let me know if you know of any such option.
Thanks in advance!
What I tried:
PDFkit/pdf-lib - too low level. Unless I'm getting something wrong, there doesn't seem to be a way to create word wrapped layouts with basic tables.
jsPDF doesn't seem to be able to use the HTML functionality on the server(I think to get it to work I'd have to let it use a browser...? if so, doesn't really help).
Puppeteer/other libraries that pilot a browser - well, it uses a browser so a no-go for large docs.
Praying to Odin - No luck so far.
I have a custom graph algorithm and graph with some additional data in it, and I want to create a tool which creates this graph (Shape and size will be asked via UI) and then modifies it in some way. I tried simple forms and then processing the data with python, outputting and showing a graphviz converted to png. Graphviz makes edgeless graphs in an ugly way - they are in one line.
My goal is to create something more interactive, and user friendlier. My friends recommended me to do this in Unity, although, I have no experience with it. And internet recommends me javascript, but I have been always avoiding web as much as I could... So my Weapons are: Python, Java, C++ (I prefer Python). The tool is not meant to be commercial, it is for educational purposes only. Maybe there is really some simple way I am still missing. I want something similar to this: https://www.cs.usfca.edu/~galles/visualization/BTree.html
I am developing an online assessment package for elementary grade math (K-6) Many questions will need to contain graphics such as shown on this image:
https://www.dropbox.com/s/xwsi91l3bp9t3de/samplegraphics.PNG
All graphics needs to be generated on-the-fly (apart from photos of real objects that are stored in a database) - so that unlimited number of problems can be created). Another requirement is that this works well on both desktop and mobile devices.
I am looking for an advice as to what language / graphics package would be best suited for this purpose. I would rather do everything in one environment. If some of the above can not be generated on the fly, I would consider (but not prefer) off-line generation of many examples that are then stored in a database.
I have considered the following
php+gd -- seems nice for manipulating images; however 3D not readily available.
jpgraph.net/features/gallery.php seems like a nice addition for spiffy graphs
There also seems to be a 3D rendered for php phpclasses.org/package/3364-PHP-Compose-and-render-3D-object-models.html -- my 3D requirements are modest (basic shapes, no animation)
JS with different plugins i.e. threejs.org/ for 3D - but this seems like an overkill for my needs
there is also js interface to html 5 canvas : calebevans.me/projects/jcanvas/
and this: keith-wood.name/svgRef.html
Google charts also seems very simple to use, but it doesn't provide everything I need
CSS3 - seems like it can do everything (??)
gnuplot (??) - not on-the-fly
Basically, I am looking for the easiest way to accomplish this, without reinventing the wheel - I am just not quite sure what the trade-offs of different approaches are.
I am looking for a way to have an animated character in my game. I would like to have a running animation loop when he is running, a jump animation when he jumps etc.
Does the awe6 framework provide anything like this? Maybe using spritesheets, or separate images for each frame.
If I have to use my own system, are there any popular libraries that can help do this, and that work well with awe6? And how would I use it with the framework?
awe6 is not something that works out of the box but rather an architecture for you to build on. It is not designed to fill your requirements without work from you and requires you to have at least a good understanding to integrate another framework/target runtime for what you want. They do have a wiki however you can start with http://code.google.com/p/awe6/wiki/QuickStart
There are many popular frameworks out there that have a lower barrier to entry, such as haxepunk.com, haxeflixel.com, https://github.com/aduros/flambe they all have their own strengths/weaknesses etc for you to decide on and can all easily complete your requests.
I need to work with the 3d model of some places. Google Earth has the 3d building layer with "Gray Buildings" in it. This would be exactly what I would require. Is there any way to get the 3d models that are used? Is there a Google Earth API (other than the Javascript stuff)? (I'm working in .net) that would help?
Or is there at least a manual solution how I can get these models, say, into Sketchup?
Thanks a lot!
While there still isn't support for getting building geometry from Google's APIs, OpenStreetMaps does expose some data you can use. Check out this guide here:
http://wiki.flightgear.org/OpenStreetMap_buildings
Making a request like
http://overpass-api.de/api/xapi?way[bbox=-74.02037,40.69704,-73.96922,40.73971][building=*][#meta]
Will return an XML with building's base outlines and (in some cases) heights. You can use this info to extrude some very simple buildings: http://i.imgur.com/ayNPB.png
To fill in the missing height values (and they're missing on most buildings), I try to use the area of the building's footprint to determine how tall it might be compared to nearby buildings. Unfortunately, until Google is able to make their models public, this will have to do.
There is currently no way to download models from within Google Earth. Also, even is there was - extracting data is against the TOS. Many of the models come from government or private sources so there are issues with licencing the data as a whole. It is worth noting however that a lot of the models in Google Earth are located on the Sketch up 3dwarehouse so maybe you could get that data you want from there?
Also, to work with the javascript api from managed code you might want to check this control library I have put together. Whilst the controls themselves may not be applicable, the ideas behind them should get you under way. http://code.google.com/p/winforms-geplugin-control-library/ essentially there are a series of wrappers and helpers that let you seamlessly integrate the plugin into a winforms application.
You can also read more about Cities in 3d (the name of the project that developed the low-res building layer) here: http://sketchup.google.com/3dwh/citiesin3d/