camera.h

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#ifndef CAMERA_H
#define CAMERA_H
 
#include "object.h"
 
struct vox_camera;
 
struct vox_camera_interface
{
    VOX_OBJECT (vox_camera);
    /*
     * -------
     * Methods
     * -------
    */
    void (*screen2world) (const struct vox_camera *camera, vox_dot ray, int sx, int sy);
    void (*rotate_camera) (struct vox_camera *camera, const vox_dot delta);
    void (*move_camera) (struct vox_camera *camera, const vox_dot delta);
    void (*look_at) (struct vox_camera *camera, const vox_dot coord);
    /*
     * ------------------------
     * Specific setters/getters
     * ------------------------
     */
    void (*get_position) (const struct vox_camera *camera, vox_dot res);
    void (*set_window_size) (struct vox_camera *camera, int w, int h);
    /*
     * --------------
     * 64-byte border
     * --------------
     */
 
    /*
     * ----------------------
     * Constructor/destructor
     * ----------------------
     */
    struct vox_camera* (*construct_camera) (const struct vox_camera *camera);
    void (*destroy_camera) (struct vox_camera *camera);
};
 
struct vox_camera
{
    struct vox_camera_interface *iface; 
};
 
VOX_EXPORT void vox_use_camera_methods (struct vox_camera *camera,
                                        const struct vox_camera_interface *iface);
 
VOX_EXPORT void vox_init_camera (struct vox_camera *camera);
 
VOX_EXPORT struct vox_camera_interface* vox_camera_methods (const char *name);
#endif