breakhack/src/vector2d.h

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/*
* BreakHack - A dungeone crawler RPG
* Copyright (C) 2018 Linus Probert <linus.probert@gmail.com>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
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#ifndef VECTOR2D_H_
#define VECTOR2D_H_
#include <stdbool.h>
#define VECTOR2D_NODIR (Vector2d) { 0, 0 }
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#define VECTOR2D_RIGHT (Vector2d) { 1, 0 }
#define VECTOR2D_LEFT (Vector2d) { -1, 0 }
#define VECTOR2D_UP (Vector2d) { 0, -1 }
#define VECTOR2D_DOWN (Vector2d) { 0, 1 }
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typedef struct Vector2d_t {
float x;
float y;
} Vector2d;
bool
vector2d_equals(Vector2d, Vector2d);
bool
vector2d_is_opposite(Vector2d, Vector2d);
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#endif // VECTOR2D_H_