Retro-3D-Neon-LineGrid in processing
Posted by Nikolaus Gradwohl
I made some aimated neon 3d linegrid in processing, very retro-style.
It uses no openGL - only lines, just as i would have coded it in Basic on my Atari :-)
click here to see it!
File Upload in Servlet 3.0
Posted by Nikolaus Gradwohl
I played around a bit with the new servlet-api 3.0 and tomcat7 and i really like it. it has some nice features like servlet declaration using annotations or the support for asynchornous requesthandling, but the feature that i really really love is the support for file upload.
To handle a file upload form like this
<html>
<body>
<form action="upload" enctype="multipart/form-data" method="post">
<input type="file" name="filename"/>
<input type="submit" value="submit"/>
</form>
</body>
</html>
is to mark the servlet with an annotation and access the uploaded file using 'request.getPart("filename")' like this
package at.hpc.servlettest;
import java.io.*;
import javax.servlet.*;
import javax.servlet.annotation.*;
import javax.servlet.http.*;
@WebServlet(name="testUpload", urlPatterns={"/upload"})
@MultipartConfig
public class TestUpload extends HttpServlet {
protected void doPost( HttpServletRequest req, HttpServletResponse res )
throws ServletException, IOException {
Part part = req.getPart("filename");
res.setContentType( part.getContentType());
res.setHeader( "disposition", "inline" );
OutputStream out = res.getOutputStream();
InputStream in = part.getInputStream();
byte buffer[] = new byte[ 4048 ];
int n = 0;
while ((n = in.read( buffer )) > 0) {
out.write( buffer, 0, n );
}
out.close();
}
}
This is a really silly example that just copies the uploaded file back to the browser, but it shows how clean and simple handling fileuploads gets with this api - this is the feature i have been waiting for years!
Outdoor Monster
Posted by Nikolaus Gradwohl
These are some monsters that have been found out on the street (tnx to sidney and paul for the ticket monster :-))
Curling Animation II
Posted by Nikolaus Gradwohl
I made another animation with Context Free Art and a small ruby script. The scroll down to see the sourcecode I have used for this file. This animation uses the same technique i used for my first one
Curling Recursion 2 from Nikolaus Gradwohl on Vimeo.
Read more...
hand drawn stop motion very-short-film
Posted by Nikolaus Gradwohl
This are very small pencil doodles i made while waiting that the "percusion-drill-in-concrete"-sounds in my flat go away. I then turned them into an short movie. and - tataaaa! - here it is
tataaaa! from Nikolaus Gradwohl on Vimeo.
Spool Holder printed on Makerbot
Posted by Nikolaus Gradwohl
I have some spools with cables lying around on my working desk. so i printed 2 spool holders on my makerbot to tidy things up a bit.
downlaod the openscad file or the stl file to print them.
OpenFrameworks boid demo
Posted by Nikolaus Gradwohl
I made a small boids demo in openframeworks. It is more or less a port of the boids demo i made in processing a while ago.
It's bin a while since i wrote c++ the last time, so i'm pretty sure i have forgotten to free some memory or have done something very unc++y :-)
Calling R from Processing
Posted by Nikolaus Gradwohl
Processing is a simple and powerfull programming language to create images, animation and interaction.
R is a powerfull free software environment for statistical computing.
For me this sounds like a perfect match. This is a short howto that shows how these two languages can comunicate with each other.
On the R-Side I use the Rserve extension, which can be installed by calling
install.packages("Rserve")
from within the R environment.
By calling
library(Rserve)
Rserve()
from within the R, you can start a serverprocess that accepts commands on a network socket and can be used by a javaclient to execute R commands.
In the processing sketch we need to add the two jar files of the javaclient that can be downloaded at the Rserve download page http://www.rforge.net/Rserve/files/
just add the jar files to the sketch using "Add file ..." from the "Sketch"-Menu.
Now we can use the REngine class to execute some R code in the server process and ask R to return the calculated data
Read more...little 3D figure
Posted by Nikolaus Gradwohl
My boss asked me to clone myself several times, so i started by making a little 3d figure in blender and printed it on my Makerbot. Not quite a clone of me, but every journey begins with a first step :-)
click here to download the stl file
