It was some time since I used my original Rasperry PI, as it had been gathering dust for a number of reasons.  The main reason was one of performance, as much as anyone might love the PI they cannot claim that at 700mhz browsing the internet on a PI is anything more that a turgid […]

When sending some SVG work to a laser cutter I stumbled on an interesting problem (where really there shouldn’t be one!) Now you’d be forgiven for thinking that a vector graphics format using document units of mm (millimetres) couldn’t possible have any issue with scale from one package to another… Surely 1mm in Inkscape = […]

The mini is a great ereader, I love the fact that its size makes it even more convenient than a pulp paperback, best of all I love that the internal boot media is a removable SD card, while its not a terrible inconvenience to use something like a bus pirate to modify a flash chip […]

Here we’re going to look at a very simple callback in C an how you might wrap it for Java. Let’s dive straight in with some example code JNIEXPORT void JNICALL Java_Bogus_setCallback   (JNIEnv *e, jclass c, jobject inst, jstring method) {     const char *cbn = (*e)->GetStringUTFChars(e, method, 0);     bcbclass = (*e)->GetObjectClass(e, inst); […]

First off I don’t claim to be any kind of JNI guru and frankly I like to touch C as little as possible – C’s memory management model is only marginally better than C++’s (shudder) – that should get me a few flames >:) That said I did struggle to find any easy to digest […]

I posted last time about my discovery of nanovg a lightweight vector graphic library, and mentioned that I was wrapping it for Java. Well now its in a working condition I put it up on github Enjoy!    

I stumbled on a really nice vector graphics library, its not all featured but the big advantage its both lightweight and simple and makes some nice graphics as can be seen by a screen shot Its not an actual gui just a mock up, but there is some animation to the demo, and it looks […]

I looked at using Lwjgl’s framework for creating a GLES 2.0 wrapper, but failed miserably (several times) at even working out how you’d even tell it there was a new library… instead I decided to port my Lwjgl3 example to an existing GLES 2.0 wrapper… For a while now I’ve had a slim wrapper of […]

Well… I meant to do this a lot earlier and indeed having this would have saved me flooding the console with junk – not an ideal way to debug! I wanted a few things from my string printer, first of all I wanted it to scale with the screen (regardless of screen ratio) I decided […]

Its common when using OpenGL to simply rotate objects by doing successive rotations around different axes, while keeping track of these rotations via 3 angles, one for each axis.  This is simple to implement and if for example you’re simply travelling over a plane or surface then you’re unlikely to have much in the way […]