Is anyone developing robots and/or gadgets for Google Wave?
I have been a part of the sandbox development for a few days and I was interested in seeing what others have thought about the Google Wave APIs.
I was also wondering what everyone has been working on. Please share your opinions and comments!
I haven't tried the gadgets, but from the little I've looked at them, they seem pretty straight-forward. They're implemented in a template-ish way and you can easily keep states in them, allowing more complex things such as RSVP lists and even games.
Robots are what I'm most interested in, and well, all I can say is that they're really easy to develop! Like barely any effort at all! Heck, I'll code one for you right here:
import waveapi.events
import waveapi.robot
def OnBlipSubmitted(properties, context):
# Get the blip that was just submitted.
blip = context.GetBlipById(properties['blipId'])
# Respond to the blip (i.e. create a child blip)
blip.CreateChild().GetDocument().SetText('That\'s so funny!')
def OnRobotAdded(properties, context):
# Add a message to the end of the wavelet.
wavelet = context.GetRootWavelet()
wavelet.CreateBlip().GetDocument().SetText('Heeeeey everybody!')
if __name__ == '__main__':
# Register the robot.
bot = waveapi.robot.Robot(
'The Annoying Bot',
image_url='http://example.com/annoying-image.gif',
version='1.0',
profile_url='http://example.com/')
bot.RegisterHandler(waveapi.events.BLIP_SUBMITTED, OnBlipSubmitted)
bot.RegisterHandler(waveapi.events.WAVELET_SELF_ADDED, OnRobotAdded)
bot.Run()
Right now I'm working on a Google App Engine project that's going to be a collaborative text adventure game. For this game I made a bot that lets you play it on Wave. It uses Wave's threading of blips to let you branch the game at any point etc. For more info, have a look at the Google Code project page (scroll down a little bit for a screenshot.)
Go to Google Wave developers and read the blogs, forums and all your questions will be answered including a recent post for a gallery of Wave apps. You will also find other developers to play in the sandbox with.
I have been working on Gadgets, using the Wave API. It's pretty easy to work with. For the most part, you can use javascript inside an XML file. You just need to have the proper tags for the XML file. Below is a sample of what a Gadget would look like, this particular gadget retrieves the top headlines from Slashdot and displays them at the top of the Wave. You can learn more about Gadgets here and here.
alt text http://www.m1cr0sux0r.com/xml.jpg
Related
I'm not asking for anyone to build me an app.
I just need some tips on getting started.
So what I wanted to do:
be able to map some routes/directions, similar to what Google Maps already has regarding the local transit in a city.
Why? Because Google's database is a bit outdated, first. Second, because I want to create a local database with the routes and with the stations. Unfortunately, I can't really do that using Google Maps and I think Leaflet could help me with this much better. This would've been a web app, where someone with an account could add/edit/delete the routes.
create an Android app that :
a) sees the routes, allows an user to find the closest path to get from point A to B using only the routes I have in my database, sort by tram/bus etc
b) allows the user to mark a location and say something like "bus no 37 was here at hour:minute:second" - this would appear for anyone else that is using the app, similar to what another app lets you do this for police cars and traffic jams
c) extra: allow users to input some data so that my app could also give predictions; for example, someone inputs it took 10m50s to get from point X to point Y on route Z. That remains in a database and then someone else inputs some data for the same path...i would create some algorithm that could get predictions on where would a bus be now if someone marked it at Station 'bla' 5 minutes ago. I know, I know, this might be pretty hard, and it would be pretty inaccurate, I should consider the time of day, but it would just be something small, as an extra. Also, would be cool if this stuff could be added automatically: like the user sets the route he's on, starts "recording", then stops it when he gets off the vehicle and the time and locations are automatically taken into consideration.
Hope you understand what I have in my mind.
Thing is, what would you recommend?
I know Java, Spring MVC and a bit of Android. JavaScript, HTML and CSS won't be a problem. I need to combine these. If I will use Leaflet, as far as I can find, I won't really be able to use it in an Android APP, I would have to create a web app. At the same time, Google Maps doesn't really let me do what I want for my "personal" database. I can't even create decent custom routes by adding waypoints because parts of the Tramway Line aren't on streets with car access. ALso, would you think this is easier/better to do as an Android app or as a web app? I'm kinda new to Android.
I hope this isn't an unsuitable thing to ask on stackoverflow.
I'm open to any ideas.
allows an user to find the closest path to get from point A to B using only the routes I have in my database, sort by tram/bus etc
Routing is hard. Multi-modal routing (tram+bus+car+walking+cycle) even more so. See pgRouting and Valhalla. If you're going to do anything with public transport, then you'll have to deal with GTFS too.
Research into OpenTripPlanner also, as there are several actors developing some similar platforms.
I hope this isn't an unsuitable thing to ask on stackoverflow.
I'm afraid it kinda is - see https://stackoverflow.com/help/on-topic, point 4.
I want to generate chords from a midi file, but I can't find any source code written in java yet. So I want to write it by myself. What I want to do first is to gather the notes in the same position, but this is the problem, I don't know if there is a way to get the midi note position using JMusic. If not, are there any way to get this information? Thank you all~
Like slim mentioned, Midi files are basically a collection of Midi Events, which are basically hex bytes of code that correspond to a Midi action. EVERYTHING in Midi (including very in-depth things like tempo, setting the instrument bank to typical things such as note on/off events and note volume [called velocity in MIDI]) is controlled by those Midi Events. Unfortunately, you're going to need ALL of that information in order to do what you want.
My advice? There is this odd notion (that I once held before working with Midi as well) that Midi should be simple to work with because it's been around for so long and it's so easy to use in DAW's like FL Studio. Well let me be the person to crush this notion for you; MIDI is complex, hard, and idiosyncratic. As a beginner, it will force you to take caffeine (to keep the gears rolling and for headaches), tylenol (also for the headaches) and alcohol when you realize you just worked 6 hours for one thing and you're getting the fatigue. Turn back now, pay Dave Smith to help you, or hit the books, cause it's going to get nasty.
HOWEVER: You will never feel greater success than when your baby starts playing music.
Just curious to know what it will take for me to have human capability to my java programs. Currently to display a message i use System.out.println and to read user's input i may use something like System.in. Wondering if there is a way for me to say System.out.speak() and System.hear();
If not possible with Java i'm okay to learn other languages please help.
Wondering if there is a way for me to say System.out.speak() and System.hear();
Literally, no.
System.out is a PrintWriter and there is no speak() method.
There is no System.hear() method.
Adding such methods would entail hacking on standard system classes ... making the resulting library "NOT Java(tm)".
Furthermore, there are no standard APIs in the Java libraries for text to speech or speech to text. (And I'm not aware of any other language that offers this functionality as a standard feature.)
However, I'm sure that if you looked hard enough you could find 3rd-party tools for doing this that could be integrated with Java, one way or another.
UPDATE
In fact, you have found the standard Android (as distinct from Java) APIs for this:
Speech recognition: android.speech
Text to speech: android.speech.tts
From a design perspective, I think it would be a better idea to support this kind of thing in the OS's user interface framework (where the user can control it), and not embed it in individual applications.
So it sounds like this is what you want:
"System.out.speak()" -- as you know by now, that's not a real thing. I think I could propose a high-level, temporary solution.
It sounds like you just want to be audibly notified when you reach a certain part in your code. Perhaps you could just record a wav or mp3 of yourself saying whatever it is you want to hear as an alert, and then import the wav/mp3 into your project directory. Refer to this article to figure out how to playback that audio:
Playing .mp3 and .wav in Java?
You could simply make a static method that takes in a string representing the desired audio playback and then does so by however the link above suggests.
If you want it to take in a string, and then have some sort of computer voice (e.g. Microsoft Sam) speak that string, that's a lot more complicated. I have no idea how to do that haha. But I'm guessing it's not as hard as your idea of "System.in.hear()"
"System.in.hear()" -- This is definitely not a thing. This requires knowledge in the field of Speech-To-Text (STT). This is basically how Siri or Google Now parses what you say to them. I'm sure there are libraries you could find that do this, but I'm too lazy to look for you :(
I hope this helps a little bit. I'm doing a little bit of research right now on STT and I saw your question pop up. I'm not very knowledgeable in the area, but I hope you figure out a way to get audio feedback instead of having to put println's everywhere. You should figure that out and reuse it.
Happy programming!
I have been busy in the last couple of days designing and coding a voxel for Java.
My ultimate goal is to have a small game with a player who can move around and shoot things in a voxel-based world. Everything has been working great so far - I have gotten the voxel engine to work and to load a map saved in a simple XML format. However, I would like to be able to load .vxl maps from Ace of Spades (I believe it uses Voxlap).
I found this as a manual on how a .vxl is structured. However, how would I go about implementing something similiar in Java, instead of the C++ pseudo-code? I'm not asking for code, just for a direction on how to do something like that.
i was wondering if anyone has knowledge on the recontruction of 3D objects from live video feed. Does any have any java based examples or papers JAVA based that i could be linked to as i have read up on algorithm's used to produce such 3d objects. If possible i would like to construct something such as the program demostrated in the link provided below.
Currently my program logs live video feed.
http://www.youtube.com/watch?v=brkHE517vpo&feature=related
3D reconstruction of an object from a single point of view is not really possible. You have two basic alternatives: a) To have a stereo camera system capturing the object, b) To have only one camera, but rotating the object (so you will have different points of view of the object), like the one in the video. This is a basic concept related with epipolar geometry.
There are other alternatives, but more intrusive. Some time ago I've been working on a 3D scanner based on a single camera and a laser beam.
For this, I used OpenCV which is C++ code, but now I think there are ports for Java. Have in mind that 3D reconstruction is not an easy task, and the resulting app. will have to be largely parametrized to achieve good results.
This isn't a solved problem - certain techniques can do it to a certain degree under the right conditions. For example, the linked video shows a fairly simple flat-faced object being analysed while moving slowly under relatively even lighting conditions.
The effectiveness of such techniques can also be considerably improved if you can get a second (stereo vision) video feed.
But you are unlikely to get it to work for general video feeds. Problem such as uneven lighting, objects moving in front of the camera, fast motion, focus issues etc. make the problem extremely hard to solve. The best you can probably hope for is a partial reconstruction which can then be reviewed and manually edited to correct the inevitable mistakes.
JavaCV and related projects are probably the best resource if you want to explore further. But don't get your hopes too high for a magic out-of-the-box solution!