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added an extension method for rectangle penetration

This commit is contained in:
Ell 2020-10-05 23:23:30 +02:00
parent 5bcfcaf3cb
commit 58eae7d240

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@ -200,5 +200,24 @@ namespace MLEM.Extensions {
0, 0, 0, 1));
}
/// <summary>
/// Returns the amount that the rectangle <paramref name="rect"/> is penetrating the rectangle <paramref name="other"/> by.
/// If a penetration on both axes is occuring, the one with the lower value is returned.
/// This is useful for collision detection, as it can be used to push colliding objects out of each other.
/// </summary>
/// <param name="rect">The rectangle to do the penetration</param>
/// <param name="other">The rectangle that should be penetrated</param>
/// <returns>A penetration vector, or <see cref="Vector2.Zero"/> if the rectangles don't intersect</returns>
public static Vector2 Penetrate(this RectangleF rect, RectangleF other) {
var intersection = RectangleF.Intersect(rect, other);
if (intersection.IsEmpty)
return Vector2.Zero;
if (intersection.Width < intersection.Height) {
return new Vector2(rect.Center.X < other.Center.X ? intersection.Width : -intersection.Width, 0);
} else {
return new Vector2(0, rect.Center.Y < other.Center.Y ? intersection.Height : -intersection.Height);
}
}
}
}