Following ThinMatrix's engine tutorial found here: https://www.youtube.com/watch?v=VS8wlS9hF8E&list=PLRIWtICgwaX0u7Rf9zkZhLoLuZVfUksDP
LWJGL is a java implementation of OpenGL, OpenCV, OpenAL and other libraries natively written in C.
ThinMatrix uses a deprecated version of LWJGL (LWJGL 2). This project follows along with his tutorial but recreates his engine in LWJGL 3, the most updated version of the library. The majority of changes found in LWJGL 3 are due to updating to more concise/optimized OpenGL functions.
Differences between LWJGL 2 and LWJGL 3 discovered so far:
- No more Display class -> Instead adopts GLFW
- No more Vector/Matrix classes -> Created my own Vector/Matrix classes
- Getting input now is uses GLFW to get keys.
- Timing and fps/ups is checked through GLFW's accurate timer instead of native timer/lwjgl2's Sys class.
- Scroll wheel, cursor position and mouse input is now done through GLFW's callback functions.
Deviations from tutorial
- Constants class is created so that there are as little hard coded values as possible.
- Camera is intended to model 2.5D instead of the 0-yaw, 0-pitch, 0-roll view adopted by the tutorial
- Projection matrix is defined in MathUtils for consistency
- Fog constants are designated outside of GLSL code
- Created inline anonymous functions (updated to Java 8) to accept mouse/cursor/scroll input. Currently have templates for a utilities package to hold these callback functions but will implement later