40 lines
595 B
C
40 lines
595 B
C
#include "vector2d.h"
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bool
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vector2d_equals(Vector2d v1, Vector2d v2)
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{
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return v1.x == v2.x && v1.y == v2.y;
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}
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bool
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vector2d_is_opposite(Vector2d v1, Vector2d v2)
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{
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return ((v1.x > 0 && v2.x < 0) ^ (v1.y > 0 && v2.y < 0))
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|| ((v1.x < 0 && v2.x > 0) ^ (v1.y < 0 && v2.y > 0));
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}
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void
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vector2d_reverse(Vector2d *vec)
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{
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vec->x *= -1;
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vec->y *= -1;
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}
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Vector2d
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vector2d_to_direction(const Vector2d *vec)
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{
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Vector2d new = VEC2D(vec->x, vec->y);
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if (new.x > 0)
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new.x = 1;
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else if (new.x < 0)
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new.x = -1;
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if (new.y > 0)
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new.y = 1;
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else if (new.y < 0)
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new.y = -1;
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return new;
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}
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