RayLab/scene.h at main · jibstack64/RayLab · GitHub

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#ifndef SCENE_H
#define SCENE_H

#include <stdint.h>
#include <raylib.h>
#include "context.h"
#include "script.h"
#include "ui.h"

#define TOGGLES_SET(u32, i) ((u32) |= (1U << (i)))
#define TOGGLES_GET(u32, i) (((u32) >> (i)) & 1U)
#define TOGGLES_CLR(u32, i) ((u32) &= ~(1U << (i)))
#define TOGGLES_TOG(u32, i) ((u32) ^= (1U << (i)))

/* Mode specification for `Scene.init` function. */
typedef enum SceneInitMode {
    SCENE_INIT, SCENE_CLEAN, SCENE_ALT
} SceneInitMode;

typedef struct Scene {
    // Scene title
    uintptr_t uid;
    void *data, *content;
    uint32_t toggles;
    char *subtitle;
    void
        (*init)(Context*, struct Scene*, SceneInitMode),
        (*update)(Context*, struct Scene*, float),
        (*draw)(Context*, struct Scene*);
} Scene;

/* Creates a new `Scene`. */
static Scene scene_new(char *subtitle,
        void (*init)(Context*, struct Scene*, SceneInitMode),
        void (*update)(Context*, struct Scene*, float),
        void (*draw)(Context*, struct Scene*)) {
    return (Scene) {
        .uid = (uintptr_t)&subtitle, // UID (it works)
        .data = 0,
        .content = 0,
        .subtitle = subtitle,
        .init = init,
        .update = update,
        .draw = draw
    };
}

#endif