Also has a complete set of common 3D stuff like shapes, simple objects, textures, particle emiters, cameras, lights, video in 3d, etc. The API is available on their web site.

An interesting example that came with the API, is the trends example. Originally it show the earth with a beam (like the sun) coming out form random places over the surface. I changed that beam to a particle emitter and put a sequence of images of the profile of a location aware (fake) social network. Basically, it shows now who is where in the world (watch the video).

Another great example is a GAME I’ve found, a kind of wonder boy style called Infinite journey form LargeAnimal.

That’s all for now, next time I will be posting more of my work. Appreciate any comment, Cheers!

If you pay attentio to the chart in the lower part shows how “news about” twitter eclipsed any other thing on the web, at  least for a couple of days (the kutner effect).

Cheers!

Leandro Milmanda Perez

Something changed, we did? I guess…. the use of social network is here for good.

If you are interested in being part of social networks or want to build your,  own leave your comments or contact me.

by Leandro Milanda Perez.

As I twitted last week I am testing an early version of Google’s App Engine in Java flavor. If you never got the chance to try it, or you are just curious about it, I wrote a few tutorials about how to do regular things, including: java patters, servlets, data access, etc.

Use this command to anonymously check out the latest project source code:

Example 1 – Using DataStore nad JPA

I created a POJO calle SimplePojo and stored un DS using JPA. Below is a copy of the persistance.xml file I am using…

<?xml version="1.0" encoding="UTF-8" ?>
<persistence xmlns="http://java.sun.com/xml/ns/persistence"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/persistence
        http://java.sun.com/xml/ns/persistence/persistence_1_0.xsd" version="1.0">

    <persistence-unit name="transactions-optional">
        <provider>org.datanucleus.store.appengine.jpa.DatastorePersistenceProvider</provider>
        <class>com.gae.tutorial.pojo.SimplePojo</class>
        <properties>
            <property name="datanucleus.NontransactionalRead" value="true"/>
            <property name="datanucleus.NontransactionalWrite" value="true"/>
            <property name="datanucleus.ConnectionURL" value="appengine"/>
        </properties>
    </persistence-unit>
</persistence>

Note the the hardcoded appengie value from the connection URL. Below the Poj file…

import javax.jdo.annotations.Column;

import javax.persistence.Entity;

import javax.persistence.GeneratedValue;

import javax.persistence.GenerationType;

import javax.persistence.Id;

import javax.persistence.NamedQueries;

import javax.persistence.NamedQuery;

import javax.persistence.Table;

@Entity

@Table(name = "simple_pojo")

@NamedQueries( {

    @NamedQuery(name = "getLast", query = "SELECT p FROM SimplePojo p ORDER BY p.id DESC")

})

public class SimplePojo {

    @Id

    @GeneratedValue(generator="generador",strategy=GenerationType.IDENTITY)

    @Column(name="ID")

    private Long id;

    @Column(name="VALOR")

    private String valor;

    public Long getId() {

        return id;

    }

    public void setId(Long id) {

        this.id = id;

    }

    public String getValor() {

        return valor;

    }

    public void setValor(String valor) {

        this.valor = valor;

    }

}

To fully understand this example I recommend you to checkout the SVN source repo and open it on eclipse. One important thing is that you need to install the App Engine SDK for Java and the eclipse plugins from App Engine too.

Also recommend you to get an account and start uusing it.!

Cheers!

Leandro.