From 7b09710392d35fb55b52031d447a542d99fc6b4b Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Tue, 19 Aug 2014 17:10:03 -0400 Subject: Modularize the libdimension codebase. --- libdimension/dimension/model/camera.h | 66 +++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 libdimension/dimension/model/camera.h (limited to 'libdimension/dimension/model/camera.h') diff --git a/libdimension/dimension/model/camera.h b/libdimension/dimension/model/camera.h new file mode 100644 index 0000000..37f80b9 --- /dev/null +++ b/libdimension/dimension/model/camera.h @@ -0,0 +1,66 @@ +/************************************************************************* + * Copyright (C) 2009-2014 Tavian Barnes * + * * + * 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 * + * . * + *************************************************************************/ + +/** + * @file + * Cameras. + */ + +/* Forward-declare dmnsn_camera */ +typedef struct dmnsn_camera dmnsn_camera; + +/** + * Camera ray callback. + * @param[in] camera The camera itself. + * @param[in] x The x coordinate of the pixel (in [0, 1]). + * @param[in] y The y coordinate of the pixel (in [0, 1]). + * @return The ray through (\p x, \p y). + */ +typedef dmnsn_ray dmnsn_camera_ray_fn(const dmnsn_camera *camera, double x, double y); + +/** A camera. */ +struct dmnsn_camera { + /* Callback functions */ + dmnsn_camera_ray_fn *ray_fn; /**< Camera ray callback. */ + + dmnsn_matrix trans; /**< Transformation matrix. */ +}; + +/** + * Create a dummy camera. + * @param[in] pool The memory pool to allocate from. + * @return The allocated camera. + */ +dmnsn_camera *dmnsn_new_camera(dmnsn_pool *pool); + +/** + * Initialize a dmnsn_camera field. + * @param[out] camera The camera to initialize. + */ +void dmnsn_init_camera(dmnsn_camera *camera); + +/** + * Invoke the camera ray callback, then correctly transform the ray. + * @param[in] camera The camera itself. + * @param[in] x The x coordinate of the pixel (in [0, 1]). + * @param[in] y The y coordinate of the pixel (in [0, 1]). + * @return The ray through (\p x, \p y). + */ +dmnsn_ray dmnsn_camera_ray(const dmnsn_camera *camera, double x, double y); -- cgit v1.2.3