/// <summary>
/// Returns a vector with the same orientation as this one but with a <see cref="Length"/> of <c>1f</c>.
/// </summary>
/// <remarks>
/// This operation is also referred to as Normalization.
/// </remarks>
/// <returns>[this.X / Length, this.Y / Length, this.Z / Length, this.W / Length]</returns>
public Vector4 ToUnit()
{
Assure.False(EqualsExactly(ZERO), "Zero vector has no corresponding unit.");
if (IsUnit)
{
return(this);
}
float magnitude = Length;
return(new Vector4(X / magnitude, Y / magnitude, Z / magnitude, W / magnitude));
}
/// <summary>
/// Returns a unit-length quaternion with the same inter-component proportions.
/// </summary>
/// <returns>A unit length Quaternion.</returns>
public Quaternion ToUnit()
{
Assure.False(EqualsExactly(ZERO), "Zero quaternion has no corresponding unit.");
if (IsUnit)
{
return(this);
}
float magnitude = Norm;
return(new Quaternion(X / magnitude, Y / magnitude, Z / magnitude, W / magnitude));
}
/// <summary>
/// Freeze mutations to sensitive state, blocking any callers to <see cref="AcquirePermit()"/>.
/// This method will block if mutations are currently ongoing on another thread; and will return once all active <see cref="MutationPermit"/>s
/// have been disposed.
/// </summary>
public void FreezeMutations()
{
Assure.False(Monitor.IsEntered(freezeLock), "MutationPermits have not been disposed on current thread or mutations are already frozen.");
Monitor.Enter(freezeLock);
var msb = LosgapSystem.ActiveMSB;
if (msb != null)
{
msb.MasterWaitOnExternalLock(freezeLock, freezeMasterBlockPredicate);
}
Assure.Equal(activeMutatorsCounter, 0);
}
public static void WriteGenericToPtr <T>(IntPtr dest, T value, int sizeOfT) where T : struct
{
Assure.False(dest == IntPtr.Zero);
Assure.True(typeof(T).IsBlittable());
Assure.Equal(sizeOfT, (uint)SizeOf <T>());
byte * bytePtr = (byte *)dest;
TypedReference valueref = __makeref(value);
byte * valuePtr = (byte *)*((IntPtr *)&valueref);
for (uint i = 0U; i < sizeOfT; ++i)
{
bytePtr[i] = valuePtr[i];
}
}
/// <summary>
/// Copies data from the <paramref name="source"/> pointer to the <paramref name="destination"/> array.
/// </summary>
/// <typeparam name="T">The array element type. Must be a <see cref="Extensions.IsBlittable">blittable</see> struct.</typeparam>
/// <param name="source">The pointer to the source data. Must not be <see cref="IntPtr.Zero"/>.</param>
/// <param name="destination">The destination array to which the data will be copied. This method will copy
/// <see cref="ArraySlice{T}.Length"/> elements' worth of data, starting at the <see cref="ArraySlice{T}.Offset"/>.</param>
/// <param name="arrayElementSizeBytes">The size of <typeparamref name="T"/>. Use either sizeof() (preferred), or
/// <see cref="SizeOf{T}"/> if the type is not known at compile-time.</param>
public static unsafe void CopyGenericArray <T>(IntPtr source, ArraySlice <T> destination, uint arrayElementSizeBytes) where T : struct
{
Assure.False(source == IntPtr.Zero);
Assure.True(typeof(T).IsBlittable());
Assure.Equal((int)arrayElementSizeBytes, SizeOf <T>());
GCHandle pinnedArrayHandle = GCHandle.Alloc(destination.ContainingArray, GCHandleType.Pinned);
try {
MemCopy(source,
pinnedArrayHandle.AddrOfPinnedObject() + (int)(arrayElementSizeBytes * destination.Offset), destination.Length * arrayElementSizeBytes);
}
finally {
pinnedArrayHandle.Free();
}
}
public static T ReadGenericFromPtr <T>(IntPtr source, int sizeOfT) where T : struct
{
Assure.False(source == IntPtr.Zero);
Assure.True(typeof(T).IsBlittable());
Assure.Equal(sizeOfT, (uint)SizeOf <T>());
byte *bytePtr = (byte *)source;
T result = default(T);
TypedReference resultRef = __makeref(result);
byte * resultPtr = (byte *)*((IntPtr *)&resultRef);
for (uint i = 0U; i < sizeOfT; ++i)
{
resultPtr[i] = bytePtr[i];
}
return(result);
}
/// <summary>
/// Relinquishes permission for mutation, allowing state-freezing to happen.
/// </summary>
public void Dispose()
{
if (additionalLockObject != null)
{
Monitor.Exit(additionalLockObject);
}
lock (barrier.freezeLock) {
#if DEBUG
Assure.False(isDisposed, "Can not dispose same MutationPermit more than once!");
isDisposed = true;
#endif
--barrier.activeMutatorsCounter;
if (barrier.activeMutatorsCounter == 0)
{
Monitor.PulseAll(barrier.freezeLock);
}
}
}
public void False()
{
// Define variables and constants
// Set up context
// Execute
Assure.False(false);
try {
Assure.False(true);
Assert.Fail();
}
catch (AssuranceFailedException) {
}
// Assert outcome
}
