simple-2d

Set of pre-built 2d components and systems to simplify writing 2d games using @strictly-regulated-fun/ecs.

Provides some simple functions to operate on vectors.

Usage

Define prebuilt systems.

const engine = createEngine();
engine.defineSystem(accelerationSystem);
engine.defineSystem(velocitySystem);
engine.defineSystem(angularAccelerationSystem);
engine.defineSystem(angularVelocitySystem);
engine.defineSystem(maxVelocitySystem);

You may not need all of them. For example, you may leave out the ones operating on acceleration and directly change the velocities of your entities.

Create your entity:

const { position, velocity, acceleration, rotation, maximumVelocity } = simple2dComponents;

const player = engine
  .createEntity()
  .set(position, { x: 1, y: 1 })
  .set(velocity, { dx: 0, dy: 0 })
  .set(maximumVelocity, 5)
  .set(rotation, Math.PI / 2);

// Accelerate in the direction you are pointing at.
player.set(acceleration, vectorInDirection(player.get(rotation), 10));