79 lines
2.1 KiB
C
79 lines
2.1 KiB
C
#pragma once
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#include <stdint.h>
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#include "types.h"
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#include "util/vector.h"
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#include "util/tree.h"
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#include "physics.h"
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#include "player.h"
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#include "render_component.h"
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#include "mapper_misc.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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typedef struct _App App;
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typedef struct _Entity Entity;
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typedef void (*entity_Thinker)(App *app, Entity *e, Duration deltaTime); // The Thinker function type assigned to Entities
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// Entity.
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typedef struct _Entity {
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uintptr_t id;
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char *name; // Allocated on the stack & copied
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Component_Position *position;
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Component_Hitbox *hitbox;
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Component_Player *player;
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Component_Render *render;
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Component_Misc *misc;
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entity_Thinker thinker; // Called by System_Entity each frame if not NULL.
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void *thinkerData; // Data managed by the Thinker, if exists.
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} Entity;
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// https://en.cppreference.com/w/c/language/sizeof
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// The expression in sizeof is not evaluated
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#define ADD_COMPONENT(entity, component) \
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do { \
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entity->component = zero_malloc(sizeof(*entity->component)); \
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entity->component->super = entity; \
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} while (false)
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// Entity manager.
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typedef struct {
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App *super;
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tree_Tree *entities; // Contains Entity objects on the nodes
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uintptr_t maxID;
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vector_Vector *flaggedDelete;
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} System_Entity;
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System_Entity *entity_NewSystem(App *super);
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void entity_DeleteSystem(System_Entity *sys);
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Entity *entity_Create(System_Entity *sys, const char *name);
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// After the Entity from Create is assigned its components,
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// it should be commited into the system via this function.
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void entity_Commit(System_Entity *sys, Entity *e);
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void entity_Delete(System_Entity *sys, uintptr_t id);
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void entity_Advance(System_Entity *sys, Duration deltaTime);
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// Clears all the entities. Also calls other systems
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// to update these removals.
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//
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// Should load all other new entities and the player
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// before any game logic after this, or this probably
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// will crash. Sketchy.
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void entity_Clear(System_Entity *sys);
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#ifdef __cplusplus
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}
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#endif
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