Introduction
This is a basic Game Engine made by two students of the 3rd year of Design and Development of Videogames in CITM. It is based in Unity Engine so the GameObject sub-system, camera controls are similar and we have a game mode too. One of the features our engine has is a physics engine, implemented using Bullet Library and Opengl.
Team
Guillem
- GameObjects
- Own File
- Serialization
- Resource Manager
- Model Physicalized
- Shoot spheres
Enric
- UI
- Frustum Culling
- Mouse Picking
- Time Manager
- Vehicle
- Constraint
Core sub-systems
GameObjects sub-system
We use GameObjects like containers where they have the different components, such as transformation, mesh, textures, etc.
Own file format
We create our own way to read and load files.
Serialization
All the information of the scene that is necessarily to be replicated is converted to characters in order to be used in the future to replicate the scene.
Frustum Culling
In order to save resources, everything’s bounding box that is not colliding with the camera planes is not drawn. Also, there is a panel where the diferent features like the near and far plane can be modified as well as the FOV.
Mouse picking
A Raycast is used in order to select a GameObject from the scene. It intersects with all the GameObjects’ bounding boxes so the ray pass through them and calculate all the triangles to pick the nearest one. Once picked, in the inspector is shown the diferent components the GameObject has.
Time Management
When the play button is pressed another clock is activated so the game is running. In this case, the physics of the gameobjects work. It can be paused and if stop button is pressed, everything returns to the previous state.
Resource Manager
Only one GameObject is loaded and the others are references.
Physics sub-system
In order to implement physics in our Game Engine, we used Bullet Library. We have used it to make the following features:
Model physicalized
The whole model is physicalized so every GameObject has a collider that has the same size as their bounding box. The camera is surrounded by a sphere that collides with the other GameObjects. Finally, spheres can be shot through the camera.
Contraint
In the editor, a point to point constraint can be created. In this case, one cube can be anchored to another cube.
Vehicle
A vehicle is created to test the collision with the environment.
Video
Link to the video
Links
License
MIT License
Copyright (c) 2019 Enric & Guillem
Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the “Software”), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED “AS IS”, WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.