20 files changed, 438 insertions, 240 deletions

diff --git a/indra/llmath/CMakeLists.txt b/indra/llmath/CMakeLists.txt
index 379c3ee9ea..999bee0a3f 100644
--- a/indra/llmath/CMakeLists.txt
+++ b/indra/llmath/CMakeLists.txt
@@ -90,6 +90,7 @@ set(llmath_HEADER_FILES
     raytrace.h
     v2math.h
     v3color.h
+    v3colorutil.h
     v3dmath.h
     v3math.h
     v4color.h
diff --git a/indra/llmath/llcamera.cpp b/indra/llmath/llcamera.cpp
index ff90532f75..9034182072 100644
--- a/indra/llmath/llcamera.cpp
+++ b/indra/llmath/llcamera.cpp
@@ -93,6 +93,11 @@ F32 LLCamera::getMaxView() const
 		: MAX_FIELD_OF_VIEW; // narrow views
 }
 
+LLPlane LLCamera::getUserClipPlane()
+{
+    return mAgentPlanes[AGENT_PLANE_USER_CLIP];
+}
+
 // ---------------- LLCamera::setFoo() member functions ----------------
 
 void LLCamera::setUserClipPlane(LLPlane& plane)
diff --git a/indra/llmath/llcamera.h b/indra/llmath/llcamera.h
index 321b8ddcc4..d0afa0e88f 100644
--- a/indra/llmath/llcamera.h
+++ b/indra/llmath/llcamera.h
@@ -154,6 +154,7 @@ public:
 	
 	bool isChanged(); //check if mAgentPlanes changed since last frame.
 
+    LLPlane getUserClipPlane();
 	void setUserClipPlane(LLPlane& plane);
 	void disableUserClipPlane();
 	virtual void setView(F32 vertical_fov_rads);
diff --git a/indra/llmath/llcoordframe.cpp b/indra/llmath/llcoordframe.cpp
index 1bf51ca0eb..b25fd948f5 100644
--- a/indra/llmath/llcoordframe.cpp
+++ b/indra/llmath/llcoordframe.cpp
@@ -34,6 +34,20 @@
 #include "llquaternion.h"
 #include "llcoordframe.h"
 
+#define CHECK_FINITE(var)                                            \
+    if (!var.isFinite())                                             \
+    {                                                                \
+        LL_WARNS() << "Non Finite " << std::string(#var) << LL_ENDL; \
+        reset();                                                     \
+    }
+
+#define CHECK_FINITE_OBJ()                                       \
+    if (!isFinite())                                             \
+    {                                                            \
+        LL_WARNS() << "Non Finite in LLCoordFrame " << LL_ENDL;  \
+        reset();                                                 \
+    }
+
 #ifndef X_AXIS
 	#define X_AXIS 1.0f,0.0f,0.0f
 	#define Y_AXIS 0.0f,1.0f,0.0f
@@ -56,11 +70,7 @@ LLCoordFrame::LLCoordFrame(const LLVector3 &origin) :
 	mYAxis(Y_AXIS),
 	mZAxis(Z_AXIS)
 {
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+    CHECK_FINITE(mOrigin);
 }
 
 LLCoordFrame::LLCoordFrame(const LLVector3 &origin, const LLVector3 &direction) :
@@ -68,11 +78,7 @@ LLCoordFrame::LLCoordFrame(const LLVector3 &origin, const LLVector3 &direction)
 {
 	lookDir(direction);
 	
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+    CHECK_FINITE_OBJ();
 }
 
 LLCoordFrame::LLCoordFrame(const LLVector3 &x_axis,
@@ -83,11 +89,7 @@ LLCoordFrame::LLCoordFrame(const LLVector3 &x_axis,
 	mYAxis(y_axis), 
 	mZAxis(z_axis)
 {
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 LLCoordFrame::LLCoordFrame(const LLVector3 &origin,
@@ -99,11 +101,7 @@ LLCoordFrame::LLCoordFrame(const LLVector3 &origin,
 	mYAxis(y_axis), 
 	mZAxis(z_axis)
 {
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 
@@ -114,11 +112,7 @@ LLCoordFrame::LLCoordFrame(const LLVector3 &origin,
 	mYAxis(rotation.mMatrix[VY]),
 	mZAxis(rotation.mMatrix[VZ])
 {
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 LLCoordFrame::LLCoordFrame(const LLQuaternion &q) :
@@ -129,11 +123,7 @@ LLCoordFrame::LLCoordFrame(const LLQuaternion &q) :
 	mYAxis.setVec(rotation_matrix.mMatrix[VY]);
 	mZAxis.setVec(rotation_matrix.mMatrix[VZ]);
 
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 LLCoordFrame::LLCoordFrame(const LLVector3 &origin, const LLQuaternion &q) :
@@ -144,11 +134,7 @@ LLCoordFrame::LLCoordFrame(const LLVector3 &origin, const LLQuaternion &q) :
 	mYAxis.setVec(rotation_matrix.mMatrix[VY]);
 	mZAxis.setVec(rotation_matrix.mMatrix[VZ]);
 
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 LLCoordFrame::LLCoordFrame(const LLMatrix4 &mat) :
@@ -157,11 +143,7 @@ LLCoordFrame::LLCoordFrame(const LLMatrix4 &mat) :
 	mYAxis(mat.mMatrix[VY]),
 	mZAxis(mat.mMatrix[VZ])
 {
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 
@@ -173,11 +155,7 @@ LLCoordFrame::LLCoordFrame(const F32 *origin, const F32 *rotation) :
 	mYAxis(rotation+3*VY),
 	mZAxis(rotation+3*VZ)
 {
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 */
 
@@ -188,11 +166,7 @@ LLCoordFrame::LLCoordFrame(const F32 *origin_and_rotation) :
 	mYAxis(origin_and_rotation + 3*(VY+1)),
 	mZAxis(origin_and_rotation + 3*(VZ+1))
 {
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::LLCoordFrame()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 */
 
@@ -217,21 +191,13 @@ void LLCoordFrame::setOrigin(F32 x, F32 y, F32 z)
 {
 	mOrigin.setVec(x, y, z); 
 
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setOrigin()" << LL_ENDL;
-	}
+    CHECK_FINITE(mOrigin);
 }
 
 void LLCoordFrame::setOrigin(const LLVector3 &new_origin)
 {
 	mOrigin = new_origin; 
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setOrigin()" << LL_ENDL;
-	}
+	CHECK_FINITE(mOrigin);
 }
 
 void LLCoordFrame::setOrigin(const F32 *origin)
@@ -239,23 +205,13 @@ void LLCoordFrame::setOrigin(const F32 *origin)
 	mOrigin.mV[VX] = *(origin + VX);
 	mOrigin.mV[VY] = *(origin + VY);
 	mOrigin.mV[VZ] = *(origin + VZ);
-
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setOrigin()" << LL_ENDL;
-	}
+    CHECK_FINITE(mOrigin);
 }
 
 void LLCoordFrame::setOrigin(const LLCoordFrame &frame)
 {
 	mOrigin = frame.getOrigin();
-
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setOrigin()" << LL_ENDL;
-	}
+    CHECK_FINITE(mOrigin);
 }
 
 // setAxes()  member functions set the axes, and assume that
@@ -268,11 +224,7 @@ void LLCoordFrame::setAxes(const LLVector3 &x_axis,
 	mXAxis = x_axis;
 	mYAxis = y_axis;
 	mZAxis = z_axis;
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setAxes()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 
@@ -281,11 +233,7 @@ void LLCoordFrame::setAxes(const LLMatrix3 &rotation_matrix)
 	mXAxis.setVec(rotation_matrix.mMatrix[VX]);
 	mYAxis.setVec(rotation_matrix.mMatrix[VY]);
 	mZAxis.setVec(rotation_matrix.mMatrix[VZ]);
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setAxes()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 
@@ -293,11 +241,7 @@ void LLCoordFrame::setAxes(const LLQuaternion &q )
 {
 	LLMatrix3 rotation_matrix(q);
 	setAxes(rotation_matrix);
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setAxes()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 
@@ -313,11 +257,7 @@ void LLCoordFrame::setAxes(  const F32 *rotation_matrix )
 	mZAxis.mV[VY] = *(rotation_matrix + 3*VZ + VY);
 	mZAxis.mV[VZ] = *(rotation_matrix + 3*VZ + VZ);
 
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setAxes()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 
@@ -326,40 +266,22 @@ void LLCoordFrame::setAxes(const LLCoordFrame &frame)
 	mXAxis = frame.getXAxis();
 	mYAxis = frame.getYAxis();
 	mZAxis = frame.getZAxis();
-
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::setAxes()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
-
 // translate() member functions move mOrigin to a relative position
-
 void LLCoordFrame::translate(F32 x, F32 y, F32 z)
 {
 	mOrigin.mV[VX] += x;
 	mOrigin.mV[VY] += y;
 	mOrigin.mV[VZ] += z;
-
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::translate()" << LL_ENDL;
-	}
+    CHECK_FINITE(mOrigin);
 }
 
-
 void LLCoordFrame::translate(const LLVector3 &v)
 {
 	mOrigin += v;
-
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::translate()" << LL_ENDL;
-	}
+    CHECK_FINITE(mOrigin);
 }
 
 
@@ -368,12 +290,7 @@ void LLCoordFrame::translate(const F32 *origin)
 	mOrigin.mV[VX] += *(origin + VX);
 	mOrigin.mV[VY] += *(origin + VY);
 	mOrigin.mV[VZ] += *(origin + VZ);
-
-	if( !mOrigin.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::translate()" << LL_ENDL;
-	}
+	CHECK_FINITE(mOrigin);
 }
 
 
@@ -383,6 +300,7 @@ void LLCoordFrame::rotate(F32 angle, F32 x, F32 y, F32 z)
 {
 	LLQuaternion q(angle, LLVector3(x,y,z));
 	rotate(q);
+    CHECK_FINITE_OBJ();
 }
 
 
@@ -390,6 +308,7 @@ void LLCoordFrame::rotate(F32 angle, const LLVector3 &rotation_axis)
 {
 	LLQuaternion q(angle, rotation_axis);
 	rotate(q);
+    CHECK_FINITE_OBJ();
 }
 
 
@@ -397,6 +316,7 @@ void LLCoordFrame::rotate(const LLQuaternion &q)
 {
 	LLMatrix3 rotation_matrix(q);
 	rotate(rotation_matrix);
+    CHECK_FINITE_OBJ();
 }
 
 
@@ -405,12 +325,7 @@ void LLCoordFrame::rotate(const LLMatrix3 &rotation_matrix)
 	mXAxis.rotVec(rotation_matrix);
 	mYAxis.rotVec(rotation_matrix);
 	orthonormalize();
-
-	if( !isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::rotate()" << LL_ENDL;
-	}
+    CHECK_FINITE_OBJ();
 }
 
 
@@ -419,12 +334,7 @@ void LLCoordFrame::roll(F32 angle)
 	LLQuaternion q(angle, mXAxis);
 	LLMatrix3 rotation_matrix(q);
 	rotate(rotation_matrix);
-
-	if( !mYAxis.isFinite() || !mZAxis.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::roll()" << LL_ENDL;
-	}
+    CHECK_FINITE_OBJ();
 }
 
 void LLCoordFrame::pitch(F32 angle)
@@ -432,12 +342,7 @@ void LLCoordFrame::pitch(F32 angle)
 	LLQuaternion q(angle, mYAxis);
 	LLMatrix3 rotation_matrix(q);
 	rotate(rotation_matrix);
-
-	if( !mXAxis.isFinite() || !mZAxis.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::pitch()" << LL_ENDL;
-	}
+	CHECK_FINITE_OBJ();
 }
 
 void LLCoordFrame::yaw(F32 angle)
@@ -445,12 +350,7 @@ void LLCoordFrame::yaw(F32 angle)
 	LLQuaternion q(angle, mZAxis);
 	LLMatrix3 rotation_matrix(q);
 	rotate(rotation_matrix);
-
-	if( !mXAxis.isFinite() || !mYAxis.isFinite() )
-	{
-		reset();
-		LL_WARNS() << "Non Finite in LLCoordFrame::yaw()" << LL_ENDL;
-	}
+    CHECK_FINITE_OBJ();
 }
 
 // get*() routines
diff --git a/indra/llmath/llmath.h b/indra/llmath/llmath.h
index e508c9a199..8f01ad6c1c 100644
--- a/indra/llmath/llmath.h
+++ b/indra/llmath/llmath.h
@@ -537,6 +537,35 @@ inline void ll_remove_outliers(std::vector<VEC_TYPE>& data, F32 k)
 	}
 }
 
+// Converts given value from a linear RGB floating point value (0..1) to a gamma corrected (sRGB) value.
+// Some shaders require color values in linear space, while others require color values in gamma corrected (sRGB) space.
+// Note: in our code, values labeled as sRGB are ALWAYS gamma corrected linear values, NOT linear values with monitor gamma applied
+// Note: stored color values should always be gamma corrected linear (i.e. the values returned from an on-screen color swatch)
+// Note: DO NOT cache the conversion.  This leads to error prone synchronization and is actually slower in the typical case due to cache misses
+inline float linearTosRGB(const float val) {
+    if (val < 0.0031308f) {
+        return val * 12.92f;
+    }
+    else {
+        return 1.055f * pow(val, 1.0f / 2.4f) - 0.055f;
+    }
+}
+
+// Converts given value from a gamma corrected (sRGB) floating point value (0..1) to a linear color value.
+// Some shaders require color values in linear space, while others require color values in gamma corrected (sRGB) space.
+// Note: In our code, values labeled as sRGB are gamma corrected linear values, NOT linear values with monitor gamma applied
+// Note: Stored color values should generally be gamma corrected sRGB.  
+//       If you're serializing the return value of this function, you're probably doing it wrong.
+// Note: DO NOT cache the conversion.  This leads to error prone synchronization and is actually slower in the typical case due to cache misses.
+inline float sRGBtoLinear(const float val) {
+    if (val < 0.04045f) {
+        return val / 12.92f;
+    }
+    else {
+        return pow((val + 0.055f) / 1.055f, 2.4f);
+    }
+}
+
 // Include simd math header
 #include "llsimdmath.h"
 
diff --git a/indra/llmath/llquaternion.cpp b/indra/llmath/llquaternion.cpp
index 47374c287f..57a976b57a 100644
--- a/indra/llmath/llquaternion.cpp
+++ b/indra/llmath/llquaternion.cpp
@@ -104,6 +104,11 @@ LLQuaternion::LLQuaternion(const LLVector3 &x_axis,
 	normalize();
 }
 
+LLQuaternion::LLQuaternion(const LLSD &sd)
+{
+    setValue(sd);
+}
+
 // Quatizations
 void	LLQuaternion::quantize16(F32 lower, F32 upper)
 {
@@ -860,6 +865,26 @@ void LLQuaternion::getAngleAxis(F32* angle, LLVector3 &vec) const
 	}
 }
 
+const LLQuaternion& LLQuaternion::setFromAzimuthAndAltitude(F32 azimuthRadians, F32 altitudeRadians)
+{
+    // euler angle inputs are complements of azimuth/altitude which are measured from zenith
+    F32 pitch = llclamp(F_PI_BY_TWO - altitudeRadians, 0.0f, F_PI_BY_TWO);
+    F32 yaw   = llclamp(F_PI_BY_TWO - azimuthRadians,  0.0f, F_PI_BY_TWO);
+    setEulerAngles(0.0f, pitch, yaw);
+    return *this;
+}
+
+void LLQuaternion::getAzimuthAndAltitude(F32 &azimuthRadians, F32 &altitudeRadians)
+{
+    F32 rick_roll;
+    F32 pitch;
+    F32 yaw;
+    getEulerAngles(&rick_roll, &pitch, &yaw);
+    // make these measured from zenith
+    altitudeRadians = llclamp(F_PI_BY_TWO - pitch, 0.0f, F_PI_BY_TWO);
+    azimuthRadians  = llclamp(F_PI_BY_TWO - yaw,   0.0f, F_PI_BY_TWO);
+}
+
 // quaternion does not need to be normalized
 void LLQuaternion::getEulerAngles(F32 *roll, F32 *pitch, F32 *yaw) const
 {
diff --git a/indra/llmath/llquaternion.h b/indra/llmath/llquaternion.h
index 95e4c09695..51ce163b4e 100644
--- a/indra/llmath/llquaternion.h
+++ b/indra/llmath/llquaternion.h
@@ -28,7 +28,7 @@
 #define LLQUATERNION_H
 
 #include <iostream>
-#include <llsd.h>
+#include "llsd.h"
 
 #ifndef LLMATH_H //enforce specific include order to avoid tangling inline dependencies
 #error "Please include llmath.h first."
@@ -64,29 +64,10 @@ public:
 	LLQuaternion(const LLVector3 &x_axis,
 				 const LLVector3 &y_axis,
 				 const LLVector3 &z_axis);			// Initializes Quaternion from Matrix3 = [x_axis ; y_axis ; z_axis]
+    explicit LLQuaternion(const LLSD &sd);          // Initializes Quaternion from LLSD array.
 
-	explicit LLQuaternion(const LLSD& sd)
-	{
-		setValue(sd);
-	}
-
-	void setValue(const LLSD& sd)
-	{
-		mQ[VX] = (F32) sd[0].asReal();
-		mQ[VY] = (F32) sd[1].asReal();
-		mQ[VZ] = (F32) sd[2].asReal();
-		mQ[VS] = (F32) sd[3].asReal();
-	}
-
-	LLSD getValue() const
-	{
-		LLSD ret;
-		ret[0] = mQ[VX];
-		ret[1] = mQ[VY];
-		ret[2] = mQ[VZ];
-		ret[3] = mQ[VS];
-		return ret;
-	}
+    LLSD getValue() const;
+    void setValue(const LLSD& sd);
 
 	BOOL isIdentity() const;
 	BOOL isNotIdentity() const;
@@ -103,7 +84,8 @@ public:
 	const LLQuaternion&	set(const F32 *q);						// Sets Quaternion to normalize(quat[VX], quat[VY], quat[VZ], quat[VW])
 	const LLQuaternion&	set(const LLMatrix3 &mat);				// Sets Quaternion to mat2quat(mat)
 	const LLQuaternion&	set(const LLMatrix4 &mat);				// Sets Quaternion to mat2quat(mat)
-
+    const LLQuaternion& setFromAzimuthAndAltitude(F32 azimuth, F32 altitude);
+    
 	const LLQuaternion&	setAngleAxis(F32 angle, F32 x, F32 y, F32 z);	// Sets Quaternion to axis_angle2quat(angle, x, y, z)
 	const LLQuaternion&	setAngleAxis(F32 angle, const LLVector3 &vec);	// Sets Quaternion to axis_angle2quat(angle, vec)
 	const LLQuaternion&	setAngleAxis(F32 angle, const LLVector4 &vec);	// Sets Quaternion to axis_angle2quat(angle, vec)
@@ -124,6 +106,7 @@ public:
 	void		getAngleAxis(F32* angle, F32* x, F32* y, F32* z) const;	// returns rotation in radians about axis x,y,z
 	void		getAngleAxis(F32* angle, LLVector3 &vec) const;
 	void		getEulerAngles(F32 *roll, F32* pitch, F32 *yaw) const;
+    void        getAzimuthAndAltitude(F32 &azimuth, F32 &altitude);
 
 	F32	normalize();	// Normalizes Quaternion and returns magnitude
 	F32	normQuat();		// deprecated
@@ -190,6 +173,24 @@ public:
 	//static U32 mMultCount;
 };
 
+inline LLSD LLQuaternion::getValue() const
+{
+    LLSD ret;
+    ret[0] = mQ[0];
+    ret[1] = mQ[1];
+    ret[2] = mQ[2];
+    ret[3] = mQ[3];
+    return ret;
+}
+
+inline void LLQuaternion::setValue(const LLSD& sd)
+{
+    mQ[0] = sd[0].asReal();
+    mQ[1] = sd[1].asReal();
+    mQ[2] = sd[2].asReal();
+    mQ[3] = sd[3].asReal();
+}
+
 // checker
 inline BOOL	LLQuaternion::isFinite() const
 {
diff --git a/indra/llmath/llvolume.cpp b/indra/llmath/llvolume.cpp
index 49a186bc87..2ac1eb99ce 100644
--- a/indra/llmath/llvolume.cpp
+++ b/indra/llmath/llvolume.cpp
@@ -2205,7 +2205,6 @@ BOOL LLVolume::generate()
 			{
 				rot_mat.rotate(*profile++, tmp);
 				dst->setAdd(tmp,offset);
-				llassert(dst->isFinite3()); // MAINT-5660; don't know why this happens, does not affect Release builds
 				++dst;
 			}
 		}
@@ -4657,6 +4656,10 @@ LLVolumeFace::LLVolumeFace() :
 	mTexCoords(NULL),
 	mIndices(NULL),
 	mWeights(NULL),
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    mJustWeights(NULL),
+    mJointIndices(NULL),
+#endif
     mWeightsScrubbed(FALSE),
 	mOctree(NULL),
 	mOptimized(FALSE)
@@ -4683,6 +4686,10 @@ LLVolumeFace::LLVolumeFace(const LLVolumeFace& src)
 	mTexCoords(NULL),
 	mIndices(NULL),
 	mWeights(NULL),
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    mJustWeights(NULL),
+    mJointIndices(NULL),
+#endif
     mWeightsScrubbed(FALSE),
 	mOctree(NULL)
 { 
@@ -4747,24 +4754,46 @@ LLVolumeFace& LLVolumeFace::operator=(const LLVolumeFace& src)
 
 		if (src.mWeights)
 		{
+            llassert(!mWeights); // don't orphan an old alloc here accidentally
 			allocateWeights(src.mNumVertices);
-			LLVector4a::memcpyNonAliased16((F32*) mWeights, (F32*) src.mWeights, vert_size);
+			LLVector4a::memcpyNonAliased16((F32*) mWeights, (F32*) src.mWeights, vert_size);            
+            mWeightsScrubbed = src.mWeightsScrubbed;
 		}
 		else
 		{
-			ll_aligned_free_16(mWeights);
-			mWeights = NULL;
-		}
-        mWeightsScrubbed = src.mWeightsScrubbed;
-	}
+			ll_aligned_free_16(mWeights);            
+			mWeights = NULL;            
+            mWeightsScrubbed = FALSE;
+		}   
+
+    #if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+        if (src.mJointIndices)
+        {
+            llassert(!mJointIndices); // don't orphan an old alloc here accidentally
+            allocateJointIndices(src.mNumVertices);
+            LLVector4a::memcpyNonAliased16((F32*) mJointIndices, (F32*) src.mJointIndices, src.mNumVertices * sizeof(U8) * 4);
+        }
+        else*/
+        {
+            ll_aligned_free_16(mJointIndices);
+            mJointIndices = NULL;
+        }     
+    #endif
 
+	}
+    
 	if (mNumIndices)
 	{
 		S32 idx_size = (mNumIndices*sizeof(U16)+0xF) & ~0xF;
 		
 		LLVector4a::memcpyNonAliased16((F32*) mIndices, (F32*) src.mIndices, idx_size);
 	}
-	
+	else
+    {
+        ll_aligned_free_16(mIndices);
+        mIndices = NULL;
+    }
+
 	mOptimized = src.mOptimized;
 
 	//delete 
@@ -4796,6 +4825,13 @@ void LLVolumeFace::freeData()
 	ll_aligned_free_16(mWeights);
 	mWeights = NULL;
 
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    ll_aligned_free_16(mJointIndices);
+	mJointIndices = NULL;
+    ll_aligned_free_16(mJustWeights);
+	mJustWeights = NULL;
+#endif
+
 	delete mOctree;
 	mOctree = NULL;
 }
@@ -5449,11 +5485,17 @@ bool LLVolumeFace::cacheOptimize()
 	// DO NOT free mNormals and mTexCoords as they are part of mPositions buffer
 	ll_aligned_free_16(mWeights);
 	ll_aligned_free_16(mTangents);
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    ll_aligned_free_16(mJointIndices);
+    ll_aligned_free_16(mJustWeights);
+    mJustWeights = NULL;
+    mJointIndices = NULL; // filled in later as necessary by skinning code for acceleration
+#endif
 
 	mPositions = pos;
 	mNormals = norm;
 	mTexCoords = tc;
-	mWeights = wght;
+	mWeights = wght;    
 	mTangents = binorm;
 
 	//std::string result = llformat("ACMR pre/post: %.3f/%.3f  --  %d triangles %d breaks", pre_acmr, post_acmr, mNumIndices/3, breaks);
@@ -6363,7 +6405,19 @@ void LLVolumeFace::allocateTangents(S32 num_verts)
 void LLVolumeFace::allocateWeights(S32 num_verts)
 {
 	ll_aligned_free_16(mWeights);
-	mWeights = (LLVector4a*) ll_aligned_malloc_16(sizeof(LLVector4a)*num_verts);
+	mWeights = (LLVector4a*)ll_aligned_malloc_16(sizeof(LLVector4a)*num_verts);
+    
+}
+
+void LLVolumeFace::allocateJointIndices(S32 num_verts)
+{
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    ll_aligned_free_16(mJointIndices);
+    ll_aligned_free_16(mJustWeights);
+
+    mJointIndices = (U8*)ll_aligned_malloc_16(sizeof(U8) * 4 * num_verts);    
+    mJustWeights = (LLVector4a*)ll_aligned_malloc_16(sizeof(LLVector4a) * num_verts);    
+#endif
 }
 
 void LLVolumeFace::resizeIndices(S32 num_indices)
diff --git a/indra/llmath/llvolume.h b/indra/llmath/llvolume.h
index 1d6d35c432..a77e8c08c6 100644
--- a/indra/llmath/llvolume.h
+++ b/indra/llmath/llvolume.h
@@ -875,6 +875,7 @@ public:
 	void resizeVertices(S32 num_verts);
 	void allocateTangents(S32 num_verts);
 	void allocateWeights(S32 num_verts);
+    void allocateJointIndices(S32 num_verts);
 	void resizeIndices(S32 num_indices);
 	void fillFromLegacyData(std::vector<LLVolumeFace::VertexData>& v, std::vector<U16>& idx);
 
@@ -956,6 +957,11 @@ public:
 	// mWeights.size() should be empty or match mVertices.size()  
 	LLVector4a* mWeights;
 
+#if USE_SEPARATE_JOINT_INDICES_AND_WEIGHTS
+    LLVector4a* mJustWeights;
+    U8* mJointIndices;
+#endif
+
     mutable BOOL mWeightsScrubbed;
 
     // Which joints are rigged to, and the bounding box of any rigged
diff --git a/indra/llmath/m3math.cpp b/indra/llmath/m3math.cpp
index 802ddb9e57..65eb3348de 100644
--- a/indra/llmath/m3math.cpp
+++ b/indra/llmath/m3math.cpp
@@ -75,13 +75,6 @@ LLMatrix3::LLMatrix3(const F32 angle, const LLVector4 &vec)
 	setRot(quat);
 }
 
-LLMatrix3::LLMatrix3(const F32 angle, const F32 x, const F32 y, const F32 z)
-{
-	LLVector3 vec(x, y, z);
-	LLQuaternion	quat(angle, vec);
-	setRot(quat);
-}
-
 LLMatrix3::LLMatrix3(const F32 roll, const F32 pitch, const F32 yaw)
 {
 	setRot(roll,pitch,yaw);
@@ -294,14 +287,6 @@ LLQuaternion	LLMatrix3::quaternion() const
 	return quat;
 }
 
-
-// These functions take Rotation arguments
-const LLMatrix3&	LLMatrix3::setRot(const F32 angle, const F32 x, const F32 y, const F32 z)
-{
-	setRot(LLQuaternion(angle,x,y,z));
-	return *this;
-}
-
 const LLMatrix3&	LLMatrix3::setRot(const F32 angle, const LLVector3 &vec)
 {
 	setRot(LLQuaternion(angle, vec));
@@ -394,15 +379,6 @@ const LLMatrix3& LLMatrix3::setCol( U32 colIndex, const LLVector3& col )
 
 	return *this;
 }
-		
-// Rotate exisitng mMatrix
-const LLMatrix3&	LLMatrix3::rotate(const F32 angle, const F32 x, const F32 y, const F32 z)
-{
-	LLMatrix3	mat(angle, x, y, z);
-	*this *= mat;
-	return *this;
-}
-
 
 const LLMatrix3&	LLMatrix3::rotate(const F32 angle, const LLVector3 &vec)
 {
diff --git a/indra/llmath/m3math.h b/indra/llmath/m3math.h
index 2be5452f8d..bf38895855 100644
--- a/indra/llmath/m3math.h
+++ b/indra/llmath/m3math.h
@@ -60,7 +60,6 @@ class LLMatrix3
 		explicit LLMatrix3(const F32 *mat);					// Initializes Matrix to values in mat
 		explicit LLMatrix3(const LLQuaternion &q);			// Initializes Matrix with rotation q
 
-		LLMatrix3(const F32 angle, const F32 x, const F32 y, const F32 z);	// Initializes Matrix with axis angle
 		LLMatrix3(const F32 angle, const LLVector3 &vec);	// Initializes Matrix with axis angle
 		LLMatrix3(const F32 angle, const LLVector3d &vec);	// Initializes Matrix with axis angle
 		LLMatrix3(const F32 angle, const LLVector4 &vec);	// Initializes Matrix with axis angle
@@ -81,8 +80,7 @@ class LLMatrix3
 		// Matrix setters - set some properties without modifying others
 		//
 
-		// These functions take Rotation arguments
-		const LLMatrix3& setRot(const F32 angle, const F32 x, const F32 y, const F32 z);	// Calculate rotation matrix for rotating angle radians about (x, y, z)
+		// These functions take Rotation arguments		
 		const LLMatrix3& setRot(const F32 angle, const LLVector3 &vec);	// Calculate rotation matrix for rotating angle radians about vec
 		const LLMatrix3& setRot(const F32 roll, const F32 pitch, const F32 yaw);	// Calculate rotation matrix from Euler angles
 		const LLMatrix3& setRot(const LLQuaternion &q);			// Transform matrix by Euler angles and translating by pos
diff --git a/indra/llmath/m4math.cpp b/indra/llmath/m4math.cpp
index d89c482804..3baf1bad18 100644
--- a/indra/llmath/m4math.cpp
+++ b/indra/llmath/m4math.cpp
@@ -384,13 +384,6 @@ void LLMatrix4::initRows(const LLVector4 &row0,
 }
 
 
-const LLMatrix4& 	LLMatrix4::initRotation(const F32 angle, const F32 x, const F32 y, const F32 z)
-{
-	LLMatrix3	mat(angle, x, y, z);
-	return initMatrix(mat);
-}
-
-
 const LLMatrix4& 	LLMatrix4::initRotation(F32 angle, const LLVector4 &vec)
 {
 	LLMatrix3	mat(angle, vec);
@@ -412,17 +405,6 @@ const LLMatrix4&  	LLMatrix4::initRotation(const LLQuaternion &q)
 }
 
 
-// Position and Rotation
-const LLMatrix4&  	LLMatrix4::initRotTrans(const F32 angle, const F32 rx, const F32 ry, const F32 rz,
-											const F32 tx, const F32 ty, const F32 tz)
-{
-	LLMatrix3	mat(angle, rx, ry, rz);
-	LLVector3	translation(tx, ty, tz);
-	initMatrix(mat);
-	setTranslation(translation);
-	return (*this);
-}
-
 const LLMatrix4&  	LLMatrix4::initRotTrans(const F32 angle, const LLVector3 &axis, const LLVector3&translation)
 {
 	LLMatrix3	mat(angle, axis);
@@ -513,15 +495,6 @@ const LLMatrix4& LLMatrix4::initAll(const LLVector3 &scale, const LLQuaternion &
 	return (*this);
 }
 
-// Rotate exisitng mMatrix
-const LLMatrix4&  	LLMatrix4::rotate(const F32 angle, const F32 x, const F32 y, const F32 z)
-{
-	LLVector4	vec4(x, y, z);
-	LLMatrix4	mat(angle, vec4);
-	*this *= mat;
-	return *this;
-}
-
 const LLMatrix4&  	LLMatrix4::rotate(const F32 angle, const LLVector4 &vec)
 {
 	LLMatrix4	mat(angle, vec);
diff --git a/indra/llmath/m4math.h b/indra/llmath/m4math.h
index a77c5bc76d..bf60adb9b6 100644
--- a/indra/llmath/m4math.h
+++ b/indra/llmath/m4math.h
@@ -137,7 +137,6 @@ public:
 	bool isIdentity() const;
 	const LLMatrix4& setZero();						// Clears matrix to all zeros.
 
-	const LLMatrix4& initRotation(const F32 angle, const F32 x, const F32 y, const F32 z);	// Calculate rotation matrix by rotating angle radians about (x, y, z)
 	const LLMatrix4& initRotation(const F32 angle, const LLVector4 &axis);	// Calculate rotation matrix for rotating angle radians about vec
 	const LLMatrix4& initRotation(const F32 roll, const F32 pitch, const F32 yaw);		// Calculate rotation matrix from Euler angles
 	const LLMatrix4& initRotation(const LLQuaternion &q);			// Set with Quaternion and position
@@ -148,10 +147,6 @@ public:
 
 	// These operation create a matrix that will rotate and translate by the
 	// specified amounts.
-	const LLMatrix4& initRotTrans(const F32 angle,
-								  const F32 rx, const F32 ry, const F32 rz,
-								  const F32 px, const F32 py, const F32 pz);
-
 	const LLMatrix4& initRotTrans(const F32 angle, const LLVector3 &axis, const LLVector3 &translation);	 // Rotation from axis angle + translation
 	const LLMatrix4& initRotTrans(const F32 roll, const F32 pitch, const F32 yaw, const LLVector4 &pos); // Rotation from Euler + translation
 	const LLMatrix4& initRotTrans(const LLQuaternion &q, const LLVector4 &pos);	// Set with Quaternion and position
@@ -211,7 +206,6 @@ public:
 
 	// Rotate existing matrix
 	// These are really, really, inefficient as implemented! - djs
-	const LLMatrix4& rotate(const F32 angle, const F32 x, const F32 y, const F32 z); 		// Rotate matrix by rotating angle radians about (x, y, z)
 	const LLMatrix4& rotate(const F32 angle, const LLVector4 &vec);		// Rotate matrix by rotating angle radians about vec
 	const LLMatrix4& rotate(const F32 roll, const F32 pitch, const F32 yaw);		// Rotate matrix by Euler angles
 	const LLMatrix4& rotate(const LLQuaternion &q);				// Rotate matrix by Quaternion
diff --git a/indra/llmath/tests/m3math_test.cpp b/indra/llmath/tests/m3math_test.cpp
index 1ca2b005d9..2a0fe76aa7 100644
--- a/indra/llmath/tests/m3math_test.cpp
+++ b/indra/llmath/tests/m3math_test.cpp
@@ -77,7 +77,7 @@ namespace tut
 	template<> template<>
 	void m3math_test_object_t::test<2>()
 	{
-		LLMatrix3 llmat3_obj(30, 1, 2, 3);
+		LLMatrix3 llmat3_obj;
 		llmat3_obj.setZero();
 
 		ensure("LLMatrix3::setZero failed", 0.f == llmat3_obj.setZero().mMatrix[0][0] &&
diff --git a/indra/llmath/v2math.cpp b/indra/llmath/v2math.cpp
index a0cd642853..a24571f2c8 100644
--- a/indra/llmath/v2math.cpp
+++ b/indra/llmath/v2math.cpp
@@ -118,7 +118,7 @@ LLSD LLVector2::getValue() const
 	return ret;
 }
 
-void LLVector2::setValue(LLSD& sd)
+void LLVector2::setValue(const LLSD& sd)
 {
 	mV[0] = (F32) sd[0].asReal();
 	mV[1] = (F32) sd[1].asReal();
diff --git a/indra/llmath/v2math.h b/indra/llmath/v2math.h
index 8d5db96f5e..2335a2e327 100644
--- a/indra/llmath/v2math.h
+++ b/indra/llmath/v2math.h
@@ -49,6 +49,7 @@ class LLVector2
 		LLVector2(F32 x, F32 y);			      // Initializes LLVector2 to (x. y)
 		LLVector2(const F32 *vec);				  // Initializes LLVector2 to (vec[0]. vec[1])
         explicit LLVector2(const LLVector3 &vec); // Initializes LLVector2 to (vec[0]. vec[1])
+        explicit LLVector2(const LLSD &sd);
 		
 		// Clears LLVector2 to (0, 0).  DEPRECATED - prefer zeroVec.
 		void	clear();
@@ -61,7 +62,7 @@ class LLVector2
 		void	set(const F32 *vec);			// Sets LLVector2 to vec
 
 		LLSD	getValue() const;
-		void	setValue(LLSD& sd);
+		void	setValue(const LLSD& sd);
 
 		void	setVec(F32 x, F32 y);	        // deprecated
 		void	setVec(const LLVector2 &vec);	// deprecated
@@ -145,6 +146,10 @@ inline LLVector2::LLVector2(const LLVector3 &vec)
 	mV[VY] = vec.mV[VY];
 }
 
+inline LLVector2::LLVector2(const LLSD &sd)
+{
+    setValue(sd);
+}
 
 // Clear and Assignment Functions
 
diff --git a/indra/llmath/v3color.h b/indra/llmath/v3color.h
index daf3a6857b..43a632408c 100644
--- a/indra/llmath/v3color.h
+++ b/indra/llmath/v3color.h
@@ -100,6 +100,23 @@ public:
 
 	const LLColor3&	operator=(const LLColor4 &a);
 	
+    LL_FORCE_INLINE LLColor3 divide(const LLColor3 &col2)
+    {
+        return LLColor3(
+                mV[0] / col2.mV[0],
+                mV[1] / col2.mV[1],
+                mV[2] / col2.mV[2] );
+    }
+
+    LL_FORCE_INLINE LLColor3 color_norm()
+    {
+        F32 l = length();
+        return LLColor3(
+                mV[0] / l,
+                mV[1] / l,
+                mV[2] / l );
+    }
+
 	friend std::ostream&	 operator<<(std::ostream& s, const LLColor3 &a);		// Print a
 	friend LLColor3 operator+(const LLColor3 &a, const LLColor3 &b);	// Return vector a + b
 	friend LLColor3 operator-(const LLColor3 &a, const LLColor3 &b);	// Return vector a minus b
@@ -458,5 +475,22 @@ inline LLColor3 lerp(const LLColor3 &a, const LLColor3 &b, F32 u)
 		a.mV[VZ] + (b.mV[VZ] - a.mV[VZ]) * u);
 }
 
+inline const LLColor3 srgbColor3(const LLColor3 &a) {
+	LLColor3 srgbColor;
+	srgbColor.mV[0] = linearTosRGB(a.mV[0]);
+	srgbColor.mV[1] = linearTosRGB(a.mV[1]);
+	srgbColor.mV[2] = linearTosRGB(a.mV[2]);
+
+	return srgbColor;
+}
+
+inline const LLColor3 linearColor3(const LLColor3 &a) {
+    LLColor3 linearColor;
+    linearColor.mV[0] = sRGBtoLinear(a.mV[0]);
+    linearColor.mV[1] = sRGBtoLinear(a.mV[1]);
+    linearColor.mV[2] = sRGBtoLinear(a.mV[2]);
+
+    return linearColor;
+}
 
 #endif
diff --git a/indra/llmath/v3colorutil.h b/indra/llmath/v3colorutil.h
new file mode 100644
index 0000000000..6d8cd9329b
--- /dev/null
+++ b/indra/llmath/v3colorutil.h
@@ -0,0 +1,115 @@
+/** 
+ * @file v3color.h
+ * @brief LLColor3 class header file.
+ *
+ * $LicenseInfo:firstyear=2001&license=viewerlgpl$
+ * 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
+ * $/LicenseInfo$
+ */
+
+#ifndef LL_V3COLORUTIL_H
+#define LL_V3COLORUTIL_H
+
+#include "v3color.h"
+
+inline LLColor3 componentDiv(LLColor3 const &left, LLColor3 const & right)
+{
+    return LLColor3(left.mV[0] / right.mV[0],
+        left.mV[1] / right.mV[1],
+        left.mV[2] / right.mV[2]);
+}
+
+
+inline LLColor3 componentMult(LLColor3 const &left, LLColor3 const & right)
+{
+    return LLColor3(left.mV[0] * right.mV[0],
+        left.mV[1] * right.mV[1],
+        left.mV[2] * right.mV[2]);
+}
+
+
+inline LLColor3 componentExp(LLColor3 const &v)
+{
+    return LLColor3(exp(v.mV[0]),
+        exp(v.mV[1]),
+        exp(v.mV[2]));
+}
+
+inline LLColor3 componentPow(LLColor3 const &v, F32 exponent)
+{
+    return LLColor3(pow(v.mV[0], exponent),
+        pow(v.mV[1], exponent),
+        pow(v.mV[2], exponent));
+}
+
+inline LLColor3 componentSaturate(LLColor3 const &v)
+{
+    return LLColor3(std::max(std::min(v.mV[0], 1.f), 0.f),
+        std::max(std::min(v.mV[1], 1.f), 0.f),
+        std::max(std::min(v.mV[2], 1.f), 0.f));
+}
+
+
+inline LLColor3 componentSqrt(LLColor3 const &v)
+{
+    return LLColor3(sqrt(v.mV[0]),
+        sqrt(v.mV[1]),
+        sqrt(v.mV[2]));
+}
+
+inline void componentMultBy(LLColor3 & left, LLColor3 const & right)
+{
+    left.mV[0] *= right.mV[0];
+    left.mV[1] *= right.mV[1];
+    left.mV[2] *= right.mV[2];
+}
+
+inline LLColor3 colorMix(LLColor3 const & left, LLColor3 const & right, F32 amount)
+{
+    return (left + ((right - left) * amount));
+}
+
+inline LLColor3 smear(F32 val)
+{
+    return LLColor3(val, val, val);
+}
+
+inline F32 color_intens(const LLColor3 &col)
+{
+    return col.mV[0] + col.mV[1] + col.mV[2];
+}
+
+inline F32 color_max(const LLColor3 &col)
+{
+    return llmax(col.mV[0], col.mV[1], col.mV[2]);
+}
+
+inline F32 color_max(const LLColor4 &col)
+{
+    return llmax(col.mV[0], col.mV[1], col.mV[2]);
+}
+
+
+inline F32 color_min(const LLColor3 &col)
+{
+    return llmin(col.mV[0], col.mV[1], col.mV[2]);
+}
+
+#endif
diff --git a/indra/llmath/v4color.h b/indra/llmath/v4color.h
index 8f353ead5a..175edf1471 100644
--- a/indra/llmath/v4color.h
+++ b/indra/llmath/v4color.h
@@ -114,9 +114,11 @@ class LLColor4
 		friend LLColor4 operator-(const LLColor4 &a, const LLColor4 &b);	// Return vector a minus b
 		friend LLColor4 operator*(const LLColor4 &a, const LLColor4 &b);	// Return component wise a * b
 		friend LLColor4 operator*(const LLColor4 &a, F32 k);				// Return rgb times scaler k (no alpha change)
+        friend LLColor4 operator/(const LLColor4 &a, F32 k);                // Return rgb divided by scalar k (no alpha change)
 		friend LLColor4 operator*(F32 k, const LLColor4 &a);				// Return rgb times scaler k (no alpha change)
 		friend LLColor4 operator%(const LLColor4 &a, F32 k);				// Return alpha times scaler k (no rgb change)
 		friend LLColor4 operator%(F32 k, const LLColor4 &a);				// Return alpha times scaler k (no rgb change)
+
 		friend bool operator==(const LLColor4 &a, const LLColor4 &b);		// Return a == b
 		friend bool operator!=(const LLColor4 &a, const LLColor4 &b);		// Return a != b
 		
@@ -477,6 +479,15 @@ inline LLColor4 operator*(const LLColor4 &a, F32 k)
 		a.mV[VW]);
 }
 
+inline LLColor4 operator/(const LLColor4 &a, F32 k)
+{
+    return LLColor4(
+        a.mV[VX] / k,
+        a.mV[VY] / k,
+        a.mV[VZ] / k,
+        a.mV[VW]);
+}
+
 inline LLColor4 operator*(F32 k, const LLColor4 &a)
 {
 	// only affects rgb (not a!)
@@ -645,5 +656,29 @@ void LLColor4::clamp()
 	}
 }
 
+// Return the given linear space color value in gamma corrected (sRGB) space
+inline const LLColor4 srgbColor4(const LLColor4 &a) {
+    LLColor4 srgbColor;
+
+    srgbColor.mV[0] = linearTosRGB(a.mV[0]);
+    srgbColor.mV[1] = linearTosRGB(a.mV[1]);
+    srgbColor.mV[2] = linearTosRGB(a.mV[2]);
+    srgbColor.mV[3] = a.mV[3];
+
+    return srgbColor;
+}
+
+// Return the given gamma corrected (sRGB) color in linear space
+inline const LLColor4 linearColor4(const LLColor4 &a)
+{
+    LLColor4 linearColor;
+    linearColor.mV[0] = sRGBtoLinear(a.mV[0]);
+    linearColor.mV[1] = sRGBtoLinear(a.mV[1]);
+    linearColor.mV[2] = sRGBtoLinear(a.mV[2]);
+    linearColor.mV[3] = a.mV[3];
+
+    return linearColor;
+}
+
 #endif
 
diff --git a/indra/llmath/v4math.h b/indra/llmath/v4math.h
index 623c8b2003..b8835ba2e4 100644
--- a/indra/llmath/v4math.h
+++ b/indra/llmath/v4math.h
@@ -30,6 +30,7 @@
 #include "llerror.h"
 #include "llmath.h"
 #include "v3math.h"
+#include "v2math.h"
 
 class LLMatrix3;
 class LLMatrix4;
@@ -46,8 +47,11 @@ class LLVector4
 		LLVector4();						// Initializes LLVector4 to (0, 0, 0, 1)
 		explicit LLVector4(const F32 *vec);			// Initializes LLVector4 to (vec[0]. vec[1], vec[2], vec[3])
 		explicit LLVector4(const F64 *vec);			// Initialized LLVector4 to ((F32) vec[0], (F32) vec[1], (F32) vec[3], (F32) vec[4]);
+        explicit LLVector4(const LLVector2 &vec);
+        explicit LLVector4(const LLVector2 &vec, F32 z, F32 w);
 		explicit LLVector4(const LLVector3 &vec);			// Initializes LLVector4 to (vec, 1)
 		explicit LLVector4(const LLVector3 &vec, F32 w);	// Initializes LLVector4 to (vec, w)
+        explicit LLVector4(const LLSD &sd);
 		LLVector4(F32 x, F32 y, F32 z);		// Initializes LLVector4 to (x. y, z, 1)
 		LLVector4(F32 x, F32 y, F32 z, F32 w);
 
@@ -61,6 +65,15 @@ class LLVector4
 			return ret;
 		}
 
+        void setValue(const LLSD& sd)
+        {
+            mV[0] = sd[0].asReal();
+            mV[1] = sd[1].asReal();
+            mV[2] = sd[2].asReal();
+            mV[3] = sd[3].asReal();
+        }
+
+
 		inline BOOL isFinite() const;									// checks to see if all values of LLVector3 are finite
 
 		inline void	clear();		// Clears LLVector4 to (0, 0, 0, 1)
@@ -175,6 +188,22 @@ inline LLVector4::LLVector4(const F64 *vec)
 	mV[VW] = (F32) vec[VW];
 }
 
+inline LLVector4::LLVector4(const LLVector2 &vec)
+{
+    mV[VX] = vec[VX];
+    mV[VY] = vec[VY];
+    mV[VZ] = 0.f;
+    mV[VW] = 0.f;
+}
+
+inline LLVector4::LLVector4(const LLVector2 &vec, F32 z, F32 w)
+{
+    mV[VX] = vec[VX];
+    mV[VY] = vec[VY];
+    mV[VZ] = z;
+    mV[VW] = w;
+}
+
 inline LLVector4::LLVector4(const LLVector3 &vec)
 {
 	mV[VX] = vec.mV[VX];
@@ -191,6 +220,11 @@ inline LLVector4::LLVector4(const LLVector3 &vec, F32 w)
 	mV[VW] = w;
 }
 
+inline LLVector4::LLVector4(const LLSD &sd)
+{
+    setValue(sd);
+}
+
 
 inline BOOL LLVector4::isFinite() const
 {
@@ -500,6 +534,18 @@ inline F32		LLVector4::normVec(void)
 	return (mag);
 }
 
+// Because apparently some parts of the viewer use this for color info.
+inline const LLVector4 srgbVector4(const LLVector4 &a) {
+    LLVector4 srgbColor;
+
+    srgbColor.mV[0] = linearTosRGB(a.mV[0]);
+    srgbColor.mV[1] = linearTosRGB(a.mV[1]);
+    srgbColor.mV[2] = linearTosRGB(a.mV[2]);
+    srgbColor.mV[3] = a.mV[3];
+
+    return srgbColor;
+}
+
 
 #endif