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/*************************************************************************
* Copyright (C) 2010 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
* Perspective cameras.
*/
#include "dimension.h"
#include <stdlib.h>
/** Perspective camera ray callback. */
static dmnsn_line
dmnsn_perspective_camera_ray_fn(const dmnsn_camera *camera, double x, double y)
{
dmnsn_line l = dmnsn_new_line(
dmnsn_zero,
dmnsn_new_vector(x - 0.5, y - 0.5, 1.0)
);
return l;
}
/* Create a new perspective camera. */
dmnsn_camera *
dmnsn_new_perspective_camera(void)
{
dmnsn_camera *camera = dmnsn_new_camera();
camera->ray_fn = &dmnsn_perspective_camera_ray_fn;
return camera;
}
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