I'm playing around with native code from within processing at the moment to try and get Pen Pressure readings from a Wacom tablet on OSX.

Here's where I'm up to:

native.pde

Code:

HelloWorld hw;

void setup() {
  size(400, 400);
  
  hw = new HelloWorld();
}


void draw() {
    hw.displayHelloWorld();
}

 

new tab: HelloWorld.java

Code:

class HelloWorld {

    public native void displayHelloWorld();

    static {
	  System.loadLibrary("hello");
    }
    
    public static void main(String[] args) {
	  new HelloWorld().displayHelloWorld();
    }
}


 

save sketch and then compile the helloworld class with:

javac HelloWorld.java

create .h file with:

javah -jni HelloWorld

Write the native method implementation in file called HelloWorldImp.c, like this:

Code:

#include <jni.h>
#include "HelloWorld.h"
#include <stdio.h>

JNIEXPORT void JNICALL 
Java_HelloWorld_displayHelloWorld(JNIEnv *env, jobject obj) {
 printf("Hello world!\n");
 return;
 }

 

and then compile using:

cc -c -I/System/Library/Frameworks/JavaVM.framework/Headers HelloWorldImp.c

followed by:

cc -dynamiclib -o libhello.jnilib HelloWorldImp.o -framework JavaVM

create a code folder and insert the jnilib into it:

libhello.jnilib


Run your sketch, and bob's your uncle: Hello World!

(based on TomC's original Alpha thread http://processing.org/discourse/yabb/YaBB.cgi?board=Tools;action=display;num=1085053494)

This post suggests that Pen events can be had on OSX. Does this look possible within processing?

I'm experimenting with native code a bit, but lack the expertise to make an assessment as to whether it's possible following this thread:

http://www.jhlabs.com/java/tablet/index.html

Me no, I try different things with no results