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Physics simulation engine implemented, basic cases (null and 2d SideScroller) works

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This commit is contained in:
Andrew Kesterson
2026-05-26 10:36:31 -04:00
parent d87c5d2c20
commit 314ce5e10d
8 changed files with 271 additions and 26 deletions
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2
include/akgl/SDL_GameControllerDB.h
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@@ -1,7 +1,7 @@
#ifndef _SDL_GAMECONTROLLERDB_H_
#define _SDL_GAMECONTROLLERDB_H_
// Taken from https://raw.githubusercontent.com/mdqinc/SDL_GameControllerDB/refs/heads/master/gamecontrollerdb.txt on Mon May 25 09:28:01 PM EDT 2026
// Taken from https://raw.githubusercontent.com/mdqinc/SDL_GameControllerDB/refs/heads/master/gamecontrollerdb.txt on Tue May 26 10:27:58 AM EDT 2026
#define AKGL_SDL_GAMECONTROLLER_DB_LEN 2228

8
include/akgl/actor.h
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@@ -18,8 +18,8 @@
#define AKGL_ACTOR_STATE_MOVING_RIGHT 1 << 8 // 256 0000 0001 0000 0000
#define AKGL_ACTOR_STATE_MOVING_UP 1 << 9 // 512 0000 0010 0000 0000
#define AKGL_ACTOR_STATE_MOVING_DOWN 1 << 10 // 1024 0000 0100 0000 0000
#define AKGL_ACTOR_STATE_UNDEFINED_11 1 << 11 // 2048 0000 1000 0000 0000
#define AKGL_ACTOR_STATE_UNDEFINED_12 1 << 12 // 4096 0001 0000 0000 0000
#define AKGL_ACTOR_STATE_MOVING_IN 1 << 11 // 2048 0000 1000 0000 0000
#define AKGL_ACTOR_STATE_MOVING_OUT 1 << 12 // 4096 0001 0000 0000 0000
#define AKGL_ACTOR_STATE_UNDEFINED_13 1 << 13 // 8192 0010 0000 0000 0000
#define AKGL_ACTOR_STATE_UNDEFINED_14 1 << 14 // 16384 0100 0000 0000 0000
#define AKGL_ACTOR_STATE_UNDEFINED_15 1 << 15 // 32768 1000 0000 0000 0000
@@ -71,7 +71,9 @@ typedef struct akgl_Actor {
void *actorData;
bool visible;
SDL_Time movetimer;
float32_t mass;
float32_t vx;
float32_t vy;
float32_t vz;
float32_t x;
float32_t y;
float32_t z;

20
include/akgl/character.h
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@@ -9,14 +9,18 @@
#define AKGL_MAX_HEAP_CHARACTER 256
typedef struct akgl_Character {
uint8_t refcount;
char name[AKGL_SPRITE_MAX_CHARACTER_NAME_LENGTH];
SDL_PropertiesID state_sprites;
uint64_t movementspeed;
float32_t vx;
float32_t vy;
akerr_ErrorContext AKERR_NOIGNORE *(*sprite_add)(struct akgl_Character *, akgl_Sprite *, int);
akerr_ErrorContext AKERR_NOIGNORE *(*sprite_get)(struct akgl_Character *, int, akgl_Sprite **);
uint8_t refcount;
char name[AKGL_SPRITE_MAX_CHARACTER_NAME_LENGTH];
SDL_PropertiesID state_sprites;
uint64_t speedtime;
float32_t ax;
float32_t ay;
float32_t az;
float32_t sx;
float32_t sy;
float32_t sz;
akerr_ErrorContext AKERR_NOIGNORE *(*sprite_add)(struct akgl_Character *, akgl_Sprite *, int);
akerr_ErrorContext AKERR_NOIGNORE *(*sprite_get)(struct akgl_Character *, int, akgl_Sprite **);
} akgl_Character;

40
include/akgl/physics.h Normal file
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@@ -0,0 +1,40 @@
#ifndef _PHYSICS_H_
#define _PHYSICS_H_
#include <SDL3/SDL.h>
#include <akerror.h>
#include <akgl/actor.h>
#include <akgl/iterator.h>
typedef struct akgl_PhysicsBackend {
akerr_ErrorContext AKERR_NOIGNORE *(*simulate)(struct akgl_PhysicsBackend *self, akgl_Iterator *opflags);
akerr_ErrorContext AKERR_NOIGNORE *(*gravity)(struct akgl_PhysicsBackend *self, akgl_Actor *actor, SDL_Time curtime);
akerr_ErrorContext AKERR_NOIGNORE *(*collide)(struct akgl_PhysicsBackend *self, akgl_Actor *a1, akgl_Actor *a2);
akerr_ErrorContext AKERR_NOIGNORE *(*move)(struct akgl_PhysicsBackend *self, akgl_Actor *actor, SDL_Time curtime);
double drag_x;
double drag_y;
double drag_z;
double gravity_x;
double gravity_y;
double gravity_z;
SDL_Time gravity_time;
SDL_Time timer_gravity;
} akgl_PhysicsBackend;
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_null_gravity(akgl_PhysicsBackend *self, akgl_Actor *actor, SDL_Time curtime);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_null_collide(akgl_PhysicsBackend *self, akgl_Actor *a1, akgl_Actor *a2);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_null_move(akgl_PhysicsBackend *self, akgl_Actor *actor, SDL_Time curtime);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_init_null(akgl_PhysicsBackend *self);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_ss_gravity(akgl_PhysicsBackend *self, akgl_Actor *actor, SDL_Time curtime);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_ss_collide(akgl_PhysicsBackend *self, akgl_Actor *a1, akgl_Actor *a2);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_ss_move(akgl_PhysicsBackend *self, akgl_Actor *actor, SDL_Time curtime);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_init_sidescroller(akgl_PhysicsBackend *self);
akerr_ErrorContext AKERR_NOIGNORE *akgl_physics_simulate(akgl_PhysicsBackend *self, akgl_Iterator *opflags);
#endif // _PHYSICS_H_