Another update in the Graph Type Rendering Saga. I will use this entry to continuously add progress in the comment section. I will wrap up the remaining issues here and a layout fix for spacing. Continue reading “More Graph Type Rendering Updates …”
Tag: Embedded Device
Graph Type Rendering Update 4
Update four in the Graph Type Rendering Saga. Here just a quick update on fixing serif font glyphs like g and æ and inner shape or holes within OutlineShape in general. Continue reading “Graph Type Rendering Update 4”
Graph Type Rendering Update 3
Just another little update, the 3rd, see first update and the second one for progress.
Basically one bug within the TypecastRenderer has been fixed, transforming the Glyph into our OutlineShape. Furthermore it may produce Java code to be pasted in a test class to test remaining issues. Continue reading “Graph Type Rendering Update 3”
Graph Type Rendering Update 2
Since my last update, I changed the Type Rendering to produce OutlineShapes in font and resolution independent font em-size units instead of font-units to be divided by unitsPerEm earlier. The UI demos have also been updated and the following screenshots demonstrate Graph UIs potential of its immersive scene UI. Continue reading “Graph Type Rendering Update 2”
Graph Type Rendering Update 1
After releasing JogAmp 2.4.0 (see feature/buglist), it was time to tackle an outstanding issue once again: Type Rendering. Motivation was born again by finding the most interesting feature to use Java with JOGL on Desktop, Mobile and Embedded Devices. At least for my taste, I identified this to be Graph UI, an immersive UI within the 3D scene including text and UI objects and user interaction. Continue reading “Graph Type Rendering Update 1”
Some late C++/Java Project Experience
Lately we started to discuss JogAmp‘s Project Management a little bit and touched things like efficient Java JNI binding to native foreign functions.
Allow me to elaborate on this issue a little bit (forum copy), perhaps even go this far to debate down on the metal C++ vs virtual Java performance.
Keep in mind, I am an old dog and always focus on performance and such thing even on the Java side 😉 Continue reading “Some late C++/Java Project Experience”
Rational Expressions with frictionless Fractions and implemented Time
Natural numbers are defined as the sequence of numbers fully defined by their initial value, its successor and the successor of its successor and so forth. Despite the beauty of their intrinsic Dedekind–Peano axioms, they are also fully proven by induction.
Continue reading “Rational Expressions with frictionless Fractions and implemented Time”
Identifiable C++ Function Pointer of any kind in Direct-BT (Part 2)
Earlier I started elaborating on Direct-BT C++ implementation details, covering communication channels and data structures suitable for concurrency.
This part shall cover Jaulib’s jau::function<R(A…)>, used to manage callback lists e.g. in BTManager or simply utilizing them to delegate functionality like in jau::service_runner. Continue reading “Identifiable C++ Function Pointer of any kind in Direct-BT (Part 2)”
Direct-BT C++ Implementation Details (Part 1)
This is the first article covering Direct-BT‘s implementation details including jaulib.
See Direct-BT, Bluetooth Server and Client Programming in C++ and Java (Part 1) for a little introduction to Direct-BT.
Standard and Proprietary Communication Channels
As described, we were required to utilize the host Bluetooth implementation in the GNU/Linux kernel, i.e. BlueZ/Kernel directly without D-Bus to achieve best performance and access the native HCI, L2CAP/GATT and SMP communication channels directly. Continue reading “Direct-BT C++ Implementation Details (Part 1)”
Direct-BT, Bluetooth Server and Client Programming in C++ and Java (Part 1)
This is the first article covering Direct-BT using version 2.7.1 and may give you a little introduction into this project.
See Direct-BT C++ Implementation Details (Part 1) for some insight view.
Overview
Direct-BT provides direct Bluetooth LE and BREDR programming, offering robust high-performance support for embedded & desktop with zero overhead via C++ and Java.
It supports a fully event driven workflow from adapter management, device discovery to GATT programming, using its platform agnostic HCI, L2CAP, SMP and GATT protocol implementation.
Multiple Bluetooth adapter are handled, as well as multiple concurrent connections per adapter.
Peripheral server device programming is supported as well as the central client, which is also used for Java and C++ self unit testing across two or more Bluetooth adapter. Continue reading “Direct-BT, Bluetooth Server and Client Programming in C++ and Java (Part 1)”