ObjFW  Diff

static const float identityValues[16] = {
	1, 0, 0, 0,
	0, 1, 0, 0,
	0, 0, 1, 0,
	0, 0, 0, 1
};
static OFMatrix4x4 *identityMatrix;

static void
initIdentityMatrix(void)
{
	identityMatrix = [[OFMatrix4x4 alloc] initWithValues: identityValues];
}

@implementation OFMatrix4x4
+ (void)initialize
{
	if (self != [OFMatrix4x4 class])
		return;
}

+ (OFMatrix4x4 *)identityMatrix
{
	static OFOnceControl onceControl = OFOnceControlInitValue;
	OFOnce(&onceControl, initIdentityMatrix);

	return identityMatrix;
}

+ (instancetype)matrixWithValues: (const float [16])values
{
	return [[[self alloc] initWithValues: values] autorelease];
}