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Antonios Gogios

Software Engineer

Projects

This section contains overviews of some of the previous projects I have undertaken. In some cases I also provide associated downloadable material (like source code). Click on any of the listed projects to follow a link to a fuller description of them.

Sample Project Overviews

My 3D Engine Project (C++ / DirectX)
2009 - 2016

A personal endeavor aimed at developing a real-time 3D engine for Microsoft Windows. This project has been the source of much gained experience for me. Implemented features include i) a renderer conforming to the Blinn-Phong shading model, ii) a portable 3D math utilities and collision detection library in standard C++ , iii) a dynamic "open-world" scene loading system using discrete spatial sectors, iv) a AI path-planning system, and v) a set of custom file types, importers and exporters for efficient handling of the engine’s data.

MSc Dissertation / GPU Performance Analyzer (C++ / DirectX)
2017

Undertaken in partial fulfillment of my MSc in Computing, this study involves research and software development aimed at determining key performance optimizations for interactive and real-time 3D renderers operating on systems with exclusive GPU memory. After a thorough review of contemporary field literature, the subsequent comparative tests, measurements and analysis quantify the efficacy of the suggested optimizations, indicating a 55.04% performance increase.

x86 Bootloader Stub: Secondary CPU initialization (C++ / IA-32)
2017

A two-stage bootloader stub for x86 machines. Stage-1 is a 512-byte boot sector implemented in unicore 16-bit real mode, in assembly language. It accesses the boot disk via BIOS interrupts, loads, validates and passes control to Stage-2. Stage-2 enables 32-bit protected mode and initializes the other CPUs of the machine, enabling hardware concurrency. The boot disk employed is created using a C++ utility I wrote.

3D Math & Collision Detection Library Demo (C++, includes source code)
2012

I started writing this library as part of my .OBJ Viewer in 2010. I have been expanding it as needed ever since. This is a small command-line demo and illustrated explanation showcasing some of the library's calculations at work -- specifically 3D transformations and static collision detection. I've also included the source code with all the math functions used in the demo.

.OBJ 3D File Loader & Interactive Viewer (C++ / OpenGL)
2010 (Also 2016 Android version using Java / OpenGL ES)

An early personal excercise in real-time graphics programming, written for its educational benefit. Originally written in Standard C++ for Windows and OpenGL. All program components, such as the OBJ file parser and the 3D math library used, were intentionally written from scratch by myself. An Android version of the program was written in 2016, using Java and OpenGL ES.

Disassembly Analysis Demo: Executable Patching (C++ / IA-32)
2015

A simple demonstration aimed at altering the behavior of a compiled program by patching the executable file. It also shows how the presence of embedded strings provides cues that can greatly simplify and expedite the disassembly analysis.

Old 2D Programming Samples (C++ / SDL)
2009

Some small projects I undertook while familiarizing myself with the SDL API. They are 2D samples showcasing 2D platformer-like behavior like 2D gravity, collision detection and sprite animation.

HND 3D Scanning Assignment
2011

As part of an HND assignment, I participated in the testing of a 3D scanning software prototype procured by our course instructor. The prototype, written in C, used a webcam and a video projector as its means of scanning. It output a series of 3D fragments in .OBJ files, one for each "snapshot" of the object scanned. The purpose of the assignment was to scan our face using the equipment, then manually combine the 3D fragments, retopologize, unwrap and texture the model.

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