Experience

    2008.04~2009.02 GPD-Tools Team, software engineer
  •  Developed PC/Console platform tools and engine
  1. Auto-build tools pipeline
  2. Level editor development
  3. Planar shadow
  4. Game play character animation system
  5. Sky box/dome
  6. Dynamic texture lighting 
  7. BSP-based scene graph
    2009.02~2010.11 BU3-Technical group, senior software engineer
  • Developed  PC platform engine
  1. Direct3D 9 api
  2. Advance material: diffuse, detail, normal, specular, environment map, glossy map
  3. Light system: per vertex/pixel lighting, direction/point/spot light
  4. Cascade shadow map
  5. Deferred rendering
  6. Material sorting, sorting and proper display of transparent objects
  7. Visibility culling
  8. Distance/volumetric fog
  •  PSP platform engine development
  1. UI scripting system
  2. Font system
  3. Post effect
    2010.11~2012.6 R&D office, senior software engineer
  • Developing Flash 3D engine, Adobe Flash runtime prerelease team member
  1. GPU rendering, support Stage3D API
  2. Lighting system
  3. Materials-diffuse, normal, specular, emissive, glossy map
  4. Material sorting, sorting and proper display of transparent objects
  5. 3D billboard, plane
  6. Projective texturing
  7. Shadow map with PCF filter
  8. Flash display object GPU acceleration
  9. Particle system with local and world transform
  10. Sphere map in environment map
  11. GPU particle
  12. Depth sorting for alpha-blending objects and particle
  13. Layer-based object sorting
   2012.6~ 2013.7 R&D office, supervisory programmer
  •  Developed Android social network app
  1. Facebook graph api
  2. Google map api
  3. Http post/get
  4. Async-Http client
  5. Take picture function
  6. Chat room 
  7. Utilize SQLite to be the local database system 
  8. Notification system: Google Cloud Messaging for Android (GCM)
  • Developing HTML5 engine
  1. OpenGLES api
  2. Use LLVM compiler to transform native code from C/C++ to JavaScript (Emscripten). 
  • Developing Flash 3D engine, Adobe Flash runtime prerelease team member
  1. Using Adobe AIR to support iOS mobile devices
  2. Using Adobe AIR to support Android mobile devices
   2013.9~  Technical Development Center, lead programmer
  • Developing a cross-platform game engine(C++, Flash)
  1. Design a entity-componented based game system
  2. Cross-platform material system which support OpenGL, Direct3D, Stage3D
  3. Using WPF to develop a node-based shader editor, and WYSIWYG. This system can automatically convert shader to HLSL, GLSL, and AGAL.
  4. Design a new production pipeline, and collaborate to develop the level editor to achieve WYSIWYG by using this engine.
  5. Cross-platform compressed texture format
  6. Support PC(Direct3D, OpenGL), Flash, iOS, and Andorid platforms

Popular posts from this blog

Drawing textured cube with Vulkan on Android

Image
Vulkan is a modern hardware-accelerated Graphics API. Its goal is providing an high efficient way in low-level graphics and compute on modern GPUs for PC, mobile, and embedded devices. I am personally working a self training project, vulkan-android , to teach myself how to use this new APIs. The difference between OpenGL and Vulkan OpenGL: Higher level API in comparison with Vulkan, and the next generation of OpenGL 4 will be Vulkan.   Cross-platform and Cross-language (mostly still based on C/C++, but people implemented diverse versions and expose similar API binding based on OpenGL C++, WebGL is a good example).  Mainly used in 3D graphics and 2D image processing to interact with GPU in order to achieve hardware acceleration. Don't have a command buffer can be manipulated at the application side. That means we will be easily see draw calls being the performance bottleneck in a big and complex 3D scene. Vulkan: Cross-platform and low-overhead. Erase the boundary bet...
Read more

glTF loader for Android Vulkan

Image
This post is going to introduce how we integrate with an existing glTF loader library to make it be able to show glTF models in our Vulkan rendering framework,  vulkan-android . tinygltf In the beginning, we don't want to make our new own wheel, so choosing  tinygltf as our glTF loader. tinygltf is a C++11 based library that would help us support all possible cross-platform project easily. tinygltf setup in Android Studio In  vulkan-android  project, we put third party libraries into third_party folder. Therefore, we need to include tinygltf from third_party folder in app/CMakeLists.txt as below. set(THIRD_PARTY_DIR ../../third_party) include_directories(${THIRD_PARTY_DIR}/tinygltf) Model loading from tinygltf We are going to load a gltf ASCII or binary format model from the storage. tinygltf provides two APIs , they are LoadBinaryFromFile() and LoadASCIIFromFile() respectively based on the extension name is *.glb or *.gltf. TinyGLTF loader will return a tiny...
Read more

C++ unit testing & CI integration in GitHub (I/2)

Image
I am working on a side project,  Vulkan-Android , that is based on Java, JNI, C++, and Vulkan for Android platform. It also uses my C++ math library. Therefore, the requirement of my build and unit tests are around C++. First of all, I would make sure the unit tests in local are run properly. C++ unit test on Mac OS On Mac OS, I think the most convenient way to do unit testing for C++ is writing XCT in Xcode. In the beginning, we need to create a test plan in Xcode. It will helps us create a schema, then, in the test navigator, create a new Unit Test Target. Due to XCT was originally designed for Objective-C or Swift, if we wanna test our C++ code, we need a workaround by making the file extension name to be *.mm . And then, write down the unit tests as below: #import <XCTest/XCTest.h> #include "Vector3d.h" using namespace gfx_math; @interface testVector3D : XCTestCase @end @implementation testVector3D - (void)setUp { // Put setup code here. This method is cal...
Read more