#ifndef __COLLISION_H__ #define __COLLISION_H__ #include "list.h" #include "vector.h" #include <stdbool.h> /** * Represents the status of a collision between two shapes. * The shapes are either not colliding, or they are colliding along some axis. */ typedef struct { /** Whether the two shapes are colliding */ bool collided; /** * If the shapes are colliding, the axis they are colliding on. * This is a unit vector pointing from the first shape towards the second. * Normal impulses are applied along this axis. * If collided is false, this value is undefined. */ vector_t axis; } collision_info_t; /** * Computes the status of the collision between two convex polygons. * The shapes are given as lists of vertices in counterclockwise order. * There is an edge between each pair of consecutive vertices, * and one between the first vertex and the last vertex. * * @param shape1 the first shape * @param shape2 the second shape * @return whether the shapes are colliding, and if so, the collision axis. * The axis should be a unit vector pointing from shape1 towards shape2. */ collision_info_t find_collision(list_t *shape1, list_t *shape2); #endif // #ifndef __COLLISION_H__