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https://github.com/yoyoengine/p2d
A 2D rigidbody physics system written for yoyoengine
https://github.com/yoyoengine/p2d
2d physics-engine yoyoengine
Last synced: 18 days ago
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A 2D rigidbody physics system written for yoyoengine
- Host: GitHub
- URL: https://github.com/yoyoengine/p2d
- Owner: yoyoengine
- License: mit
- Created: 2024-12-28T18:31:50.000Z (about 1 month ago)
- Default Branch: main
- Last Pushed: 2025-01-10T20:39:15.000Z (24 days ago)
- Last Synced: 2025-01-10T21:39:15.049Z (24 days ago)
- Topics: 2d, physics-engine, yoyoengine
- Language: C
- Homepage:
- Size: 151 KB
- Stars: 1
- Watchers: 0
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Awesome Lists containing this project
README
[](https://opensource.org/licenses/MIT)
---
A 2D rigidbody physics system written for yoyoengine.
## Features
- Broad phase collision detection, using a hashed spatial grid
- OOB and Circle collision detection and resolution
- Collision and trigger callbacks
- Easy synchronization with existing ECS
## Usage
```c
#include
// example collision callback
void collision_callback(struct p2d_cb_data* data) {
// ...
}
// example trigger callback
void trigger_callback(struct p2d_cb_data* data) {
// ...
}
// at some point during init
p2d_init(TILE_SIZE, collision_callback, trigger_callback);
// create and register objects
// ...
struct p2d_object obj = {0};
obj.type = P2D_OBJECT_RECTANGLE,
obj.x = 100;
obj.y = 200;
obj.vx = 100;
obj.out_x = &YOUR_ECS_X;
obj.out_y = &YOUR_ECS_Y;
obj.out_rotation = &YOUR_ECS_ROTATION;
p2d_register_object(&obj);
// ...
// in your engine update loop: (run this at the hz you want your physics to run at)
p2d_step(physics_delta_time);
// before quitting, shutdown
p2d_shutdown();
```
## Future work
| Item | Description | Priority | Progress |
|---------------------|---------------------------------------------|----------|-----------------|
| Debug Resolution | The current basic resolution has edge cases | High | In Progress |
| Rotation Resolution | Implement rotation and torque | High | Planned |
| Advanced Gravity | Allow seperate spatial fields of gravity | Medium | Maybe Later |
| New Shapes | Implement planes for more complex shapes | Low | Maybe Later |
| Optimization | Micro-optimize for performance | Low | Maybe Later |
## Testing
`cmake -DBUILD_P2D_TESTS=ON ..`
## Resources
Here are some resources that helped me along the way, which can hopefully be useful to you too!
- [(Book) Game Physics Engine Development](https://www.amazon.com/Game-Physics-Engine-Development-Commercial-Grade/dp/0123819768)
- [(Book) Real Time Collision Detection (Book)](https://a.co/d/g9Rpjsk)
- [(Youtube) Two-Bit Coding Physics Engine Playlist](https://www.youtube.com/playlist?list=PLSlpr6o9vURwq3oxVZSimY8iC-cdd3kIs)