#include "Entity.h"

Entity::Entity(const Vector2& size, float mass)
    : size(size), inverseMass(1.0f / mass), onGround(false), jumpTicks(0) {
}

void Entity::addForce(const Vector2& force) {
    acceleration += force * inverseMass;
}

void Entity::preTick() {
    lastPosition = position;
    // start off with gravity for the next frame
    acceleration = Vector2(0.0f, -0.5f);
}

void Entity::tick() {
    // euler integration, timestep is constant
    velocity += acceleration;
    position += velocity;
}