#ifndef PHYSICS_H
#define PHYSICS_H

#include "maths.h"

typedef struct {
	vec2_t pos;
	mat2_t dir;
	vec2_t vel;
	float rot;
	float mass;
} physics_t;

typedef struct {
	float dist, va, vb;
	vec2_t norm;
} physics_sep_t;

void physics_init();
void physics_update();

void physics_add(
    unsigned entity, vec2_t pos, mat2_t dir, vec2_t vel, float rot,
    float mass);
physics_t *physics_get(unsigned entity);

void physics_escape(unsigned entity);
physics_sep_t physics_separation(unsigned a, unsigned b);
void physics_bounce(unsigned a, unsigned b, physics_sep_t sep);

#endif