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/*************************************************************************
* Copyright (C) 2008 Tavian Barnes <tavianator@gmail.com> *
* *
* This file is part of The Dimension Library. *
* *
* The Dimension Library is free software; you can redistribute it and/ *
* or modify it under the terms of the GNU Lesser General Public License *
* as published by the Free Software Foundation; either version 3 of the *
* License, or (at your option) any later version. *
* *
* The Dimension Library is distributed in the hope that it will be *
* useful, but WITHOUT ANY WARRANTY; without even the implied warranty *
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this program. If not, see *
* <http://www.gnu.org/licenses/>. *
*************************************************************************/
#ifndef DIMENSION_CAMERA_H
#define DIMENSION_CAMERA_H
/*
* A camera.
*/
/* Forward-declare dmnsn_camera */
typedef struct dmnsn_camera dmnsn_camera;
/* Camera callback types */
typedef dmnsn_line dmnsn_camera_ray_fn(const dmnsn_camera *camera,
const dmnsn_canvas *canvas,
unsigned int x, unsigned int y);
struct dmnsn_camera {
/* Generic pointer for camera info */
void *ptr;
/* Callback function */
dmnsn_camera_ray_fn *ray_fn;
};
dmnsn_camera *dmnsn_new_camera();
void dmnsn_delete_camera(dmnsn_camera *camera);
/* A perspective camera, at the origin, looking at (0, 0, 1). The feild of view
is the section of the plane z = 1 from (-0.5, -0.5) to (0.5, 0.5). Rays are
transformed by the transformation matrix `trans'. */
dmnsn_camera *dmnsn_new_perspective_camera(dmnsn_matrix trans);
void dmnsn_delete_perspective_camera(dmnsn_camera *camera);
#endif /* DIMENSION_CAMERA_H */
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