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authorTavian Barnes <tavianator@tavianator.com>2014-08-19 17:10:03 -0400
committerTavian Barnes <tavianator@tavianator.com>2015-10-25 11:03:56 -0400
commit7b09710392d35fb55b52031d447a542d99fc6b4b (patch)
tree270eb927ee8c52ceeb99926ebf4843704775a610 /libdimension/dimension/model/camera.h
parent200c86b91ea7063d35be3bffc11c5da53c054653 (diff)
downloaddimension-7b09710392d35fb55b52031d447a542d99fc6b4b.tar.xz
Modularize the libdimension codebase.
Diffstat (limited to 'libdimension/dimension/model/camera.h')
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1 files changed, 66 insertions, 0 deletions
diff --git a/libdimension/dimension/model/camera.h b/libdimension/dimension/model/camera.h
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+/*************************************************************************
+ * Copyright (C) 2009-2014 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.
+ */
+
+/* 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);