Processing Forum

How to implement a interactive 3D camera on a 2D world map ?

[10 Replies]
- 20-Apr-2013 03:39 AM
- Forum: General Discussion
Hello,
I am trying to visualiza the flow of tweets and retweets on a a 2D world map.
Something of this kind.

Just Landed - 36 Hours from blprnt on Vimeo .

Till now I have achieved this.

Can someone help me out in implementing a 3D interactive camera on this 2D map so that viewers can rotate, zoom etc on the map to see the visualization in a better way. I have tried using Pessay cam but its I am facing severe difficulties due to versions and compatibility issues with mac.

Edit Note: @amnon.owed: I am sorry for the inconvenience. I don't know why it was not appearing for you because I can see it very well. In any case I have uploaded the pic to this site only from the insert image option rather than using an URL link for the image. Hope you can see it now.

Thanks.

How to write multiple LinkLists line by line in a file and read them back as LinkedList and collectively store them in an ArrayList

[2 Replies]
- 19-Apr-2013 07:29 PM
- Forum: Programming Questions
I am doing a project in Processing. My project is on Visualizing the retweets for tweets on a give topics (# tags). I am using twitter4j to interact with Twitter API. I always end up exceeding the Twitter API Rate limit (15 queries an hour) which limits my visualization data set.

Now I am trying to write a script which runs overnight with some periodic interval to collect the data from twitter. In this way I think I will not cross the rate limit of Twitter API.

Something like this.

My project goes on twitter to search for tweets according to query parameters and for every tweets it finds it collects its retweets and then extract the user location of the tweet and retweet, pass it to Google Maps Geocoding API and gets the latitude and longitude of the tweet's user location and location of all the retweets for this tweet. Basically, the first node of the linked list stores the latitude and longitude of the tweet and following nodes stores the same of retweets.

Tweet -> Retweet 1 -> Retweet2

[22.4655, 34.5678]->[23.2344, 23.4545]->......

and I have n number of linked list of this kind which I store in an ArrayList. In short I have an ArrayList of LinkedList and the LinkedList's node is a PVector containing latitude and longitude of a location.

Now to handle the rate limit I want to write a script which does the same thing but writes the data to file which my visualization program can read and visualize on WorldMap. For this I want to prepare a LinkedList for a tweet with all its retweet's location and then write that linked list to a file then the same for the second tweet in the second line of the file.

In my visualization program I want to read the data line by line in linkedlists and store them collectively in an arraylist. I want keep this kind of structure because my visualization program is based on this.

I think this is more than sufficient information on what I am trying to do but with my limited exposure to Processing and Java I am confused about how to do it.

To summarize I want to write multiple linkedlist on a file so that one line contains one linked list and then read them line by line in n number of linkedlist and store them collectively in an arraylist.

I will be glad if someone can help me with this :)

Thanks.

Draw an animated curve between two points on a map

[19 Replies]
- 30-Mar-2013 08:24 PM
- Forum: Programming Questions
I am working on a project in processing with twitter. I am trying to visualize how topics spreads on twitter. For this I need to draw an arc or curve between two points on the map. I am using MercatorMap to display point on the map with geocoding from google api's.

I was able to draw a curve on the map with the help of some amazing member here but I need to draw these curves in animation. Can someone help me out with it.

Earlier thread: https://forum.processing.org/topic/how-to-draw-an-arc-between-two-points-on-a-map#25080000002046373

How to draw an arc between two points on a map

[10 Replies]
- 27-Mar-2013 07:54 PM
- Forum: General Discussion
I am working on a project in processing with twitter. I am trying to visualize how topics spreads on twitter. For this I need to draw an arc or curve between two points on the map. I am using MercatorMap to display point on the map with geocoding from google api's.

I am not able to find anything which can be helpful in drawing an arc between two points on the map. Can someone point me to the right direction. Furthermore I want to draw this with animation.

I am trying to achieve something like this:

Thanks.

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