Second Life viewer sources 1.13.2.12

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diff --git a/linden/indra/llmath/v2math.h b/linden/indra/llmath/v2math.h
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+/** 
+ * @file v2math.h
+ * @brief LLVector2 class header file.
+ *
+ * Copyright (c) 2000-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#ifndef LL_V2MATH_H
+#define LL_V2MATH_H
+
+#include <math.h>
+
+#include "llmath.h"
+
+class LLVector4;
+class LLMatrix3;
+class LLQuaternion;
+
+//  Llvector2 = |x y z w|
+
+static const U32 LENGTHOFVECTOR2 = 2;
+
+class LLVector2
+{
+        public:
+                F32 mV[LENGTHOFVECTOR2];
+
+                static LLVector2 zero;
+
+                LLVector2();                                                    // Initializes LLVector2 to (0, 0)
+                LLVector2(F32 x, F32 y);                            // Initializes LLVector2 to (x. y)
+                LLVector2(const F32 *vec);                              // Initializes LLVector2 to (vec[0]. vec[1])
+                
+                // Clears LLVector2 to (0, 0).  DEPRECATED - prefer zeroVec.
+                void    clearVec();
+
+                // Zero LLVector2 to (0, 0)
+                void    zeroVec();
+
+                void    setVec(F32 x, F32 y);           // Sets LLVector2 to (x, y)
+                void    setVec(const LLVector2 &vec);   // Sets LLVector2 to vec
+                void    setVec(const F32 *vec);                 // Sets LLVector2 to vec
+
+                F32             magVec() const;                         // Returns magnitude of LLVector2
+                F32             magVecSquared() const;          // Returns magnitude squared of LLVector2
+                F32             normVec();                                      // Normalizes and returns the magnitude of LLVector2
+
+                BOOL            abs();                                          // sets all values to absolute value of original value (first octant), returns TRUE if changed
+
+                const LLVector2&        scaleVec(const LLVector2& vec);                         // scales per component by vec
+
+                BOOL isNull();                  // Returns TRUE if vector has a _very_small_ length
+                BOOL isExactlyZero() const              { return !mV[VX] && !mV[VY]; }
+
+                F32 operator[](int idx) const { return mV[idx]; }
+                F32 &operator[](int idx) { return mV[idx]; }
+        
+                friend bool operator<(const LLVector2 &a, const LLVector2 &b);  // For sorting. x is "more significant" than y
+                friend LLVector2 operator+(const LLVector2 &a, const LLVector2 &b);     // Return vector a + b
+                friend LLVector2 operator-(const LLVector2 &a, const LLVector2 &b);     // Return vector a minus b
+                friend F32 operator*(const LLVector2 &a, const LLVector2 &b);           // Return a dot b
+                friend LLVector2 operator%(const LLVector2 &a, const LLVector2 &b);     // Return a cross b
+                friend LLVector2 operator/(const LLVector2 &a, F32 k);                          // Return a divided by scaler k
+                friend LLVector2 operator*(const LLVector2 &a, F32 k);                          // Return a times scaler k
+                friend LLVector2 operator*(F32 k, const LLVector2 &a);                          // Return a times scaler k
+                friend bool operator==(const LLVector2 &a, const LLVector2 &b);         // Return a == b
+                friend bool operator!=(const LLVector2 &a, const LLVector2 &b);         // Return a != b
+
+                friend const LLVector2& operator+=(LLVector2 &a, const LLVector2 &b);   // Return vector a + b
+                friend const LLVector2& operator-=(LLVector2 &a, const LLVector2 &b);   // Return vector a minus b
+                friend const LLVector2& operator%=(LLVector2 &a, const LLVector2 &b);   // Return a cross b
+                friend const LLVector2& operator*=(LLVector2 &a, F32 k);                                // Return a times scaler k
+                friend const LLVector2& operator/=(LLVector2 &a, F32 k);                                // Return a divided by scaler k
+
+                friend LLVector2 operator-(const LLVector2 &a);                                 // Return vector -a
+
+                friend std::ostream&     operator<<(std::ostream& s, const LLVector2 &a);               // Stream a
+};
+
+
+// Non-member functions 
+
+F32     angle_between(const LLVector2 &a, const LLVector2 &b);  // Returns angle (radians) between a and b
+BOOL are_parallel(const LLVector2 &a, const LLVector2 &b, F32 epsilon=F_APPROXIMATELY_ZERO);    // Returns TRUE if a and b are very close to parallel
+F32     dist_vec(const LLVector2 &a, const LLVector2 &b);               // Returns distance between a and b
+F32     dist_vec_squared(const LLVector2 &a, const LLVector2 &b);// Returns distance sqaured between a and b
+F32     dist_vec_squared2D(const LLVector2 &a, const LLVector2 &b);// Returns distance sqaured between a and b ignoring Z component
+LLVector2 lerp(const LLVector2 &a, const LLVector2 &b, F32 u); // Returns a vector that is a linear interpolation between a and b
+
+// Constructors
+
+inline LLVector2::LLVector2(void)
+{
+        mV[VX] = 0.f;
+        mV[VY] = 0.f;
+}
+
+inline LLVector2::LLVector2(F32 x, F32 y)
+{
+        mV[VX] = x;
+        mV[VY] = y;
+}
+
+inline LLVector2::LLVector2(const F32 *vec)
+{
+        mV[VX] = vec[VX];
+        mV[VY] = vec[VY];
+}
+
+
+// Clear and Assignment Functions
+
+inline void     LLVector2::clearVec(void)
+{
+        mV[VX] = 0.f;
+        mV[VY] = 0.f;
+}
+
+inline void     LLVector2::zeroVec(void)
+{
+        mV[VX] = 0.f;
+        mV[VY] = 0.f;
+}
+
+inline void     LLVector2::setVec(F32 x, F32 y)
+{
+        mV[VX] = x;
+        mV[VY] = y;
+}
+
+inline void     LLVector2::setVec(const LLVector2 &vec)
+{
+        mV[VX] = vec.mV[VX];
+        mV[VY] = vec.mV[VY];
+}
+
+inline void     LLVector2::setVec(const F32 *vec)
+{
+        mV[VX] = vec[VX];
+        mV[VY] = vec[VY];
+}
+
+// LLVector2 Magnitude and Normalization Functions
+
+inline F32              LLVector2::magVec(void) const
+{
+        return fsqrtf(mV[0]*mV[0] + mV[1]*mV[1]);
+}
+
+inline F32              LLVector2::magVecSquared(void) const
+{
+        return mV[0]*mV[0] + mV[1]*mV[1];
+}
+
+inline F32              LLVector2::normVec(void)
+{
+        F32 mag = fsqrtf(mV[0]*mV[0] + mV[1]*mV[1]);
+        F32 oomag;
+
+        if (mag > FP_MAG_THRESHOLD)
+        {
+                oomag = 1.f/mag;
+                mV[0] *= oomag;
+                mV[1] *= oomag;
+        }
+        else
+        {
+                mV[0] = 0.f;
+                mV[1] = 0.f;
+                mag = 0;
+        }
+        return (mag);
+}
+
+inline const LLVector2& LLVector2::scaleVec(const LLVector2& vec)
+{
+        mV[VX] *= vec.mV[VX];
+        mV[VY] *= vec.mV[VY];
+
+        return *this;
+}
+
+inline BOOL     LLVector2::isNull()
+{
+        if ( F_APPROXIMATELY_ZERO > mV[VX]*mV[VX] + mV[VY]*mV[VY] )
+        {
+                return TRUE;
+        }
+        return FALSE;
+}
+
+
+// LLVector2 Operators
+
+// For sorting. By convention, x is "more significant" than y.
+inline bool operator<(const LLVector2 &a, const LLVector2 &b)   
+{
+        if( a.mV[VX] == b.mV[VX] )
+        {
+                return a.mV[VY] < b.mV[VY];
+        }
+        else
+        {
+                return a.mV[VX] < b.mV[VX];
+        }
+}
+
+
+inline LLVector2 operator+(const LLVector2 &a, const LLVector2 &b)
+{
+        LLVector2 c(a);
+        return c += b;
+}
+
+inline LLVector2 operator-(const LLVector2 &a, const LLVector2 &b)
+{
+        LLVector2 c(a);
+        return c -= b;
+}
+
+inline F32  operator*(const LLVector2 &a, const LLVector2 &b)
+{
+        return (a.mV[0]*b.mV[0] + a.mV[1]*b.mV[1]);
+}
+
+inline LLVector2 operator%(const LLVector2 &a, const LLVector2 &b)
+{
+        return LLVector2(a.mV[0]*b.mV[1] - b.mV[0]*a.mV[1], a.mV[1]*b.mV[0] - b.mV[1]*a.mV[0]);
+}
+
+inline LLVector2 operator/(const LLVector2 &a, F32 k)
+{
+        F32 t = 1.f / k;
+        return LLVector2( a.mV[0] * t, a.mV[1] * t );
+}
+
+inline LLVector2 operator*(const LLVector2 &a, F32 k)
+{
+        return LLVector2( a.mV[0] * k, a.mV[1] * k );
+}
+
+inline LLVector2 operator*(F32 k, const LLVector2 &a)
+{
+        return LLVector2( a.mV[0] * k, a.mV[1] * k );
+}
+
+inline bool operator==(const LLVector2 &a, const LLVector2 &b)
+{
+        return (  (a.mV[0] == b.mV[0])
+                        &&(a.mV[1] == b.mV[1]));
+}
+
+inline bool operator!=(const LLVector2 &a, const LLVector2 &b)
+{
+        return (  (a.mV[0] != b.mV[0])
+                        ||(a.mV[1] != b.mV[1]));
+}
+
+inline const LLVector2& operator+=(LLVector2 &a, const LLVector2 &b)
+{
+        a.mV[0] += b.mV[0];
+        a.mV[1] += b.mV[1];
+        return a;
+}
+
+inline const LLVector2& operator-=(LLVector2 &a, const LLVector2 &b)
+{
+        a.mV[0] -= b.mV[0];
+        a.mV[1] -= b.mV[1];
+        return a;
+}
+
+inline const LLVector2& operator%=(LLVector2 &a, const LLVector2 &b)
+{
+        LLVector2 ret(a.mV[0]*b.mV[1] - b.mV[0]*a.mV[1], a.mV[1]*b.mV[0] - b.mV[1]*a.mV[0]);
+        a = ret;
+        return a;
+}
+
+inline const LLVector2& operator*=(LLVector2 &a, F32 k)
+{
+        a.mV[0] *= k;
+        a.mV[1] *= k;
+        return a;
+}
+
+inline const LLVector2& operator/=(LLVector2 &a, F32 k)
+{
+        F32 t = 1.f / k;
+        a.mV[0] *= t;
+        a.mV[1] *= t;
+        return a;
+}
+
+inline LLVector2 operator-(const LLVector2 &a)
+{
+        return LLVector2( -a.mV[0], -a.mV[1] );
+}
+
+inline std::ostream& operator<<(std::ostream& s, const LLVector2 &a) 
+{
+        s << "{ " << a.mV[VX] << ", " << a.mV[VY] << " }";
+        return s;
+}
+
+#endif