/// <summary>
/// Sets the category bit mask of a body. Allows using an enum instead of uint bit values.
/// </summary>
/// <param name="body">Body.</param>
/// <param name="bits">Bits.</param>
/// <param name="overwrite">If set to <c>true</c> overwrite.</param>
public static void SetCategoryBitMask(this SKPhysicsBody body, CONTACT_BITS bits, bool overwrite = true)
{
if(body == null)
{
return;
}
if (overwrite)
{
// Overwrite all bits.
body.CategoryBitMask = (uint)bits;
}
else{
// Add missing bits.
body.CategoryBitMask |= (uint)bits;
}
}
/// <summary>
/// Determines if a body belongs to a specific category.
/// </summary>
/// <returns><c>true</c> body is of the category; otherwise, <c>false</c>.</returns>
/// <param name="body">Body.</param>
/// <param name="bits">Bits.</param>
/// <param name="matchAll">If set to <c>true</c> match all bits.</param>
public static bool IsOfCategory(this SKPhysicsBody body, CONTACT_BITS bits, bool matchAll = false)
{
if(body == null)
{
return false;
}
if(matchAll)
{
// All bits must match
return (body.CategoryBitMask & (uint)bits) == (uint)bits;
}
else
{
// Any bit must match
return (body.CategoryBitMask & (uint)bits) > 0;
}
}
