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/**
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 * @file world.h
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 * @author Colony Project
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 *
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 * @brief THE WHOLE WIDE WORLD
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 *
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 * Contains structures and function prototypes used
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 * for managing the world.
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 **/
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#ifndef __WORLD_H__
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#define __WORLD_H__
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#define ID_RECTANGLE 0
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#define ID_CIRCLE 1
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#define NUM_SHAPES 2
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typedef struct {
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    double x;
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    double y;
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} point_t;
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typedef struct {
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    point_t p1; /* Lower left point */
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    point_t p2; /* Upper right point */
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} bbox_t;
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typedef struct {
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    point_t p; /* origin */
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    double d; /* direction */
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} ray_t;
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typedef struct {
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    int id;
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    bbox_t *bbox;
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    void *props; /* shape-specific properties */
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} object_t;
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typedef struct {
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    int num_objs;
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    object_t *objs;
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    bbox_t world;
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} world_t;
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/* Specific collision functions */
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double collide_circle(ray_t *ray, object_t *obj);
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double collide_rect(ray_t *ray, object_t *obj);
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/*  Array of function pointers to the specific collide functions.
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 *  Must be listed in the same order as IDs */
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double  (*collide_func[NUM_SHAPES])(ray_t *ray, object_t *obj) = 
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    {
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        collide_rect,
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        collide_circle 
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    };
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#endif
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