From d47af986a7832add1c149235f44fa8f57b56e6d8 Mon Sep 17 00:00:00 2001 From: Tavian Barnes Date: Fri, 19 Nov 2010 20:30:14 -0500 Subject: Implement sky spheres. --- libdimension/dimension/sky_sphere.h | 63 +++++++++++++++++++++++++++++++++++++ 1 file changed, 63 insertions(+) create mode 100644 libdimension/dimension/sky_sphere.h (limited to 'libdimension/dimension/sky_sphere.h') diff --git a/libdimension/dimension/sky_sphere.h b/libdimension/dimension/sky_sphere.h new file mode 100644 index 0000000..5edacb0 --- /dev/null +++ b/libdimension/dimension/sky_sphere.h @@ -0,0 +1,63 @@ +/************************************************************************* + * Copyright (C) 2010 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 + * Sky spheres. + */ + +#ifndef DIMENSION_SKY_SPHERE_H +#define DIMENSION_SKY_SPHERE_H + +/** A sky sphere. */ +typedef struct dmnsn_sky_sphere { + /** An array of pigments in inside-to-outside order. */ + dmnsn_array *pigments; + dmnsn_matrix trans; +} dmnsn_sky_sphere; + +/** + * Create a sky sphere. + * @return A new blank sky sphere. + */ +dmnsn_sky_sphere *dmnsn_new_sky_sphere(); + +/** + * Delete a sky sphere. + * @param[in,out] sky_sphere The sky sphere to delete. + */ +void dmnsn_delete_sky_sphere(dmnsn_sky_sphere *sky_sphere); + +/** + * Initialize a sky sphere. + * @param[in,out] sky_sphere The sky sphere to initialize. + */ +void dmnsn_sky_sphere_init(dmnsn_sky_sphere *sky_sphere); + +/** + * Evaluate the color of the sky sphere. + * @param[in] sky_sphere The sky sphere to evaluate. + * @param[in] d The direction to look. + * @return The color of the sky in the direction of \p d. + */ +dmnsn_color dmnsn_sky_sphere_color(const dmnsn_sky_sphere *sky_sphere, + dmnsn_vector d); + +#endif /* DIMENSION_SKY_SPHERE_H */ -- cgit v1.2.3