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/*************************************************************************
* Copyright (C) 2009-2011 Tavian Barnes <tavianator@tavianator.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/>. *
*************************************************************************/
/**
* @file
* Cameras.
*/
#include "dimension-internal.h"
#include <stdlib.h>
/* Allocate a new dummy camera */
dmnsn_camera *
dmnsn_new_camera(void)
{
dmnsn_camera *camera = dmnsn_malloc(sizeof(dmnsn_camera));
camera->free_fn = NULL;
camera->trans = dmnsn_identity_matrix();
DMNSN_REFCOUNT_INIT(camera);
return camera;
}
/* Free a dummy camera */
void
dmnsn_delete_camera(dmnsn_camera *camera)
{
if (DMNSN_DECREF(camera)) {
if (camera->free_fn) {
camera->free_fn(camera->ptr);
}
dmnsn_free(camera);
}
}
/* Invoke the camera ray function */
dmnsn_line
dmnsn_camera_ray(const dmnsn_camera *camera, double x, double y)
{
dmnsn_line ray = camera->ray_fn(camera, x, y);
return dmnsn_transform_line(camera->trans, ray);
}
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