/* * Copyright (c) 2006 Kai Braaten * * Permission is hereby granted, free of charge, to any person * obtaining a copy of this software and associated documentation * files (the "Software"), to deal in the Software without * restriction, including without limitation the rights to use, * copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the * Software is furnished to do so, subject to the following * conditions: * * The above copyright notice and this permission notice shall be * included in all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR * OTHER DEALINGS IN THE SOFTWARE. */ #ifndef _VECTOR3_H_ #define _VECTOR3_H_ typedef struct vector3 Vector3; /* * General purpose vector structure in three dimensions. */ struct vector3 { double x, y, z; }; #ifdef __cplusplus extern "C" { #endif /* * Return the length of a vector * Not to be confused with the distance between two vectors! */ double vector_length( const Vector3 * const v ); /* * Normalize a vector */ void vector_normalize( Vector3 * const v ); /* * Copy vector a vector */ void vector_copy( Vector3 * const to, const Vector3 * const from ); /* * Return the distance between two vectors */ double vector_distance( const Vector3 * const a, const Vector3 * const b ); /* * Calculate dot product */ double vector_dot( const Vector3 * const a, const Vector3 * const b ); /* * Initialize a vector's member variables. */ void vector_init( Vector3 * const v ); /* * Set the coordinates. */ void vector_set( Vector3 * const vec, double x, double y, double z ); #ifdef __cplusplus } #endif #endif