50 lines
1.3 KiB
C
50 lines
1.3 KiB
C
/*
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* BreakHack - A dungeone crawler RPG
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* Copyright (C) 2018 Linus Probert <linus.probert@gmail.com>
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#ifndef VECTOR2D_H_
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#define VECTOR2D_H_
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#include <stdbool.h>
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#define VECTOR2D_NODIR (Vector2d) { 0, 0 }
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#define VECTOR2D_RIGHT (Vector2d) { 1, 0 }
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#define VECTOR2D_LEFT (Vector2d) { -1, 0 }
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#define VECTOR2D_UP (Vector2d) { 0, -1 }
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#define VECTOR2D_DOWN (Vector2d) { 0, 1 }
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#define VEC2D(x, y) (Vector2d) { x, y }
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typedef struct Vector2d_t {
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float x;
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float y;
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} Vector2d;
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bool
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vector2d_equals(Vector2d, Vector2d);
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bool
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vector2d_is_opposite(Vector2d, Vector2d);
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Vector2d
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vector2d_to_direction(const Vector2d*);
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void
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vector2d_reverse(Vector2d*);
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#endif // VECTOR2D_H_
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