pull back fix for STORM-1260 from beta branch

1 files changed, 102 insertions, 0 deletions

diff --git a/indra/llmath/llquaternion2.inl b/indra/llmath/llquaternion2.inl
new file mode 100644
index 0000000000..2a6987552d
--- /dev/null
+++ b/indra/llmath/llquaternion2.inl
@@ -0,0 +1,102 @@
+/** 
+ * @file llquaternion2.inl
+ * @brief LLQuaternion2 inline definitions
+ *
+ * $LicenseInfo:firstyear=2010&license=viewerlgpl$
+ * Second Life Viewer Source Code
+ * Copyright (C) 2010, Linden Research, Inc.
+ * 
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation;
+ * version 2.1 of the License only.
+ * 
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ * 
+ * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
+ * $/LicenseInfo$
+ */
+
+#include "llquaternion2.h"
+
+static const LLQuad LL_V4A_PLUS_ONE = {1.f, 1.f, 1.f, 1.f};
+static const LLQuad LL_V4A_MINUS_ONE = {-1.f, -1.f, -1.f, -1.f};
+
+// Ctor from LLQuaternion
+inline LLQuaternion2::LLQuaternion2( const LLQuaternion& quat )
+{
+	mQ.set(quat.mQ[VX], quat.mQ[VY], quat.mQ[VZ], quat.mQ[VW]);
+}
+
+//////////////////////////
+// Get/Set
+//////////////////////////
+
+// Return the internal LLVector4a representation of the quaternion
+inline const LLVector4a& LLQuaternion2::getVector4a() const
+{
+	return mQ;
+}
+
+inline LLVector4a& LLQuaternion2::getVector4aRw()
+{
+	return mQ;
+}
+
+/////////////////////////
+// Quaternion modification
+/////////////////////////
+
+// Set this quaternion to the conjugate of src
+inline void LLQuaternion2::setConjugate(const LLQuaternion2& src)
+{
+	static LL_ALIGN_16( const U32 F_QUAT_INV_MASK_4A[4] ) = { 0x80000000, 0x80000000, 0x80000000, 0x00000000 };
+	mQ = _mm_xor_ps(src.mQ, *reinterpret_cast<const LLQuad*>(&F_QUAT_INV_MASK_4A));	
+}
+
+// Renormalizes the quaternion. Assumes it has nonzero length.
+inline void LLQuaternion2::normalize()
+{
+	mQ.normalize4();
+}
+
+// Quantize this quaternion to 8 bit precision
+inline void LLQuaternion2::quantize8()
+{
+	mQ.quantize8( LL_V4A_MINUS_ONE, LL_V4A_PLUS_ONE );
+	normalize();
+}
+
+// Quantize this quaternion to 16 bit precision
+inline void LLQuaternion2::quantize16()
+{
+	mQ.quantize16( LL_V4A_MINUS_ONE, LL_V4A_PLUS_ONE );
+	normalize();
+}
+
+
+/////////////////////////
+// Quaternion inspection
+/////////////////////////
+
+// Return true if this quaternion is equal to 'rhs'. 
+// Note! Quaternions exhibit "double-cover", so any rotation has two equally valid
+// quaternion representations and they will NOT compare equal.
+inline bool LLQuaternion2::equals(const LLQuaternion2 &rhs, F32 tolerance/* = F_APPROXIMATELY_ZERO*/) const
+{
+	return mQ.equals4(rhs.mQ, tolerance);
+}
+
+// Return true if all components are finite and the quaternion is normalized
+inline bool LLQuaternion2::isOkRotation() const
+{
+	return mQ.isFinite4() && mQ.isNormalized4();
+}
+