v3math.h
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- /**
- * @file v3math.h
- * @brief LLVector3 class header file.
- *
- * $LicenseInfo:firstyear=2000&license=viewergpl$
- *
- * Copyright (c) 2000-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * 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://secondlifegrid.net/programs/open_source/licensing/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://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
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- *
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- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_V3MATH_H
- #define LL_V3MATH_H
- #include "llerror.h"
- #include "llmath.h"
- #include "llsd.h"
- class LLVector2;
- class LLVector4;
- class LLMatrix3;
- class LLVector3d;
- class LLQuaternion;
- // LLvector3 = |x y z w|
- static const U32 LENGTHOFVECTOR3 = 3;
- class LLVector3
- {
- public:
- F32 mV[LENGTHOFVECTOR3];
- static const LLVector3 zero;
- static const LLVector3 x_axis;
- static const LLVector3 y_axis;
- static const LLVector3 z_axis;
- static const LLVector3 x_axis_neg;
- static const LLVector3 y_axis_neg;
- static const LLVector3 z_axis_neg;
- static const LLVector3 all_one;
- inline LLVector3(); // Initializes LLVector3 to (0, 0, 0)
- inline LLVector3(const F32 x, const F32 y, const F32 z); // Initializes LLVector3 to (x. y, z)
- inline explicit LLVector3(const F32 *vec); // Initializes LLVector3 to (vec[0]. vec[1], vec[2])
- explicit LLVector3(const LLVector2 &vec); // Initializes LLVector3 to (vec[0]. vec[1], 0)
- explicit LLVector3(const LLVector3d &vec); // Initializes LLVector3 to (vec[0]. vec[1], vec[2])
- explicit LLVector3(const LLVector4 &vec); // Initializes LLVector4 to (vec[0]. vec[1], vec[2])
- explicit LLVector3(const LLSD& sd);
- LLSD getValue() const;
- void setValue(const LLSD& sd);
- inline BOOL isFinite() const; // checks to see if all values of LLVector3 are finite
- BOOL clamp(F32 min, F32 max); // Clamps all values to (min,max), returns TRUE if data changed
- BOOL clampLength( F32 length_limit ); // Scales vector to limit length to a value
- void quantize16(F32 lowerxy, F32 upperxy, F32 lowerz, F32 upperz); // changes the vector to reflect quatization
- void quantize8(F32 lowerxy, F32 upperxy, F32 lowerz, F32 upperz); // changes the vector to reflect quatization
- void snap(S32 sig_digits); // snaps x,y,z to sig_digits decimal places
- BOOL abs(); // sets all values to absolute value of original value (first octant), returns TRUE if changed
-
- inline void clear(); // Clears LLVector3 to (0, 0, 0)
- inline void setZero(); // Clears LLVector3 to (0, 0, 0)
- inline void clearVec(); // deprecated
- inline void zeroVec(); // deprecated
- inline void set(F32 x, F32 y, F32 z); // Sets LLVector3 to (x, y, z, 1)
- inline void set(const LLVector3 &vec); // Sets LLVector3 to vec
- inline void set(const F32 *vec); // Sets LLVector3 to vec
- const LLVector3& set(const LLVector4 &vec);
- const LLVector3& set(const LLVector3d &vec);// Sets LLVector3 to vec
- inline void setVec(F32 x, F32 y, F32 z); // deprecated
- inline void setVec(const LLVector3 &vec); // deprecated
- inline void setVec(const F32 *vec); // deprecated
- const LLVector3& setVec(const LLVector4 &vec); // deprecated
- const LLVector3& setVec(const LLVector3d &vec); // deprecated
- F32 length() const; // Returns magnitude of LLVector3
- F32 lengthSquared() const; // Returns magnitude squared of LLVector3
- F32 magVec() const; // deprecated
- F32 magVecSquared() const; // deprecated
- inline F32 normalize(); // Normalizes and returns the magnitude of LLVector3
- inline F32 normVec(); // deprecated
- inline BOOL inRange( F32 min, F32 max ) const; // Returns true if all values of the vector are between min and max
- const LLVector3& rotVec(F32 angle, const LLVector3 &vec); // Rotates about vec by angle radians
- const LLVector3& rotVec(F32 angle, F32 x, F32 y, F32 z); // Rotates about x,y,z by angle radians
- const LLVector3& rotVec(const LLMatrix3 &mat); // Rotates by LLMatrix4 mat
- const LLVector3& rotVec(const LLQuaternion &q); // Rotates by LLQuaternion q
- const LLVector3& scaleVec(const LLVector3& vec); // scales per component by vec
- LLVector3 scaledVec(const LLVector3& vec) const; // get a copy of this vector scaled by vec
- BOOL isNull() const; // Returns TRUE if vector has a _very_small_ length
- BOOL isExactlyZero() const { return !mV[VX] && !mV[VY] && !mV[VZ]; }
- F32 operator[](int idx) const { return mV[idx]; }
- F32 &operator[](int idx) { return mV[idx]; }
-
- friend LLVector3 operator+(const LLVector3 &a, const LLVector3 &b); // Return vector a + b
- friend LLVector3 operator-(const LLVector3 &a, const LLVector3 &b); // Return vector a minus b
- friend F32 operator*(const LLVector3 &a, const LLVector3 &b); // Return a dot b
- friend LLVector3 operator%(const LLVector3 &a, const LLVector3 &b); // Return a cross b
- friend LLVector3 operator*(const LLVector3 &a, F32 k); // Return a times scaler k
- friend LLVector3 operator/(const LLVector3 &a, F32 k); // Return a divided by scaler k
- friend LLVector3 operator*(F32 k, const LLVector3 &a); // Return a times scaler k
- friend bool operator==(const LLVector3 &a, const LLVector3 &b); // Return a == b
- friend bool operator!=(const LLVector3 &a, const LLVector3 &b); // Return a != b
- // less than operator useful for using vectors as std::map keys
- friend bool operator<(const LLVector3 &a, const LLVector3 &b); // Return a < b
- friend const LLVector3& operator+=(LLVector3 &a, const LLVector3 &b); // Return vector a + b
- friend const LLVector3& operator-=(LLVector3 &a, const LLVector3 &b); // Return vector a minus b
- friend const LLVector3& operator%=(LLVector3 &a, const LLVector3 &b); // Return a cross b
- friend const LLVector3& operator*=(LLVector3 &a, const LLVector3 &b); // Returns a * b;
- friend const LLVector3& operator*=(LLVector3 &a, F32 k); // Return a times scaler k
- friend const LLVector3& operator/=(LLVector3 &a, F32 k); // Return a divided by scaler k
- friend const LLVector3& operator*=(LLVector3 &a, const LLQuaternion &b); // Returns a * b;
- friend LLVector3 operator-(const LLVector3 &a); // Return vector -a
- friend std::ostream& operator<<(std::ostream& s, const LLVector3 &a); // Stream a
- static BOOL parseVector3(const std::string& buf, LLVector3* value);
- };
- typedef LLVector3 LLSimLocalVec;
- // Non-member functions
- F32 angle_between(const LLVector3 &a, const LLVector3 &b); // Returns angle (radians) between a and b
- BOOL are_parallel(const LLVector3 &a, const LLVector3 &b, F32 epsilon=F_APPROXIMATELY_ZERO); // Returns TRUE if a and b are very close to parallel
- F32 dist_vec(const LLVector3 &a, const LLVector3 &b); // Returns distance between a and b
- F32 dist_vec_squared(const LLVector3 &a, const LLVector3 &b);// Returns distance squared between a and b
- F32 dist_vec_squared2D(const LLVector3 &a, const LLVector3 &b);// Returns distance squared between a and b ignoring Z component
- LLVector3 projected_vec(const LLVector3 &a, const LLVector3 &b); // Returns vector a projected on vector b
- LLVector3 lerp(const LLVector3 &a, const LLVector3 &b, F32 u); // Returns a vector that is a linear interpolation between a and b
- inline LLVector3::LLVector3(void)
- {
- mV[0] = 0.f;
- mV[1] = 0.f;
- mV[2] = 0.f;
- }
- inline LLVector3::LLVector3(const F32 x, const F32 y, const F32 z)
- {
- mV[VX] = x;
- mV[VY] = y;
- mV[VZ] = z;
- }
- inline LLVector3::LLVector3(const F32 *vec)
- {
- mV[VX] = vec[VX];
- mV[VY] = vec[VY];
- mV[VZ] = vec[VZ];
- }
- /*
- inline LLVector3::LLVector3(const LLVector3 ©)
- {
- mV[VX] = copy.mV[VX];
- mV[VY] = copy.mV[VY];
- mV[VZ] = copy.mV[VZ];
- }
- */
- // Destructors
- // checker
- inline BOOL LLVector3::isFinite() const
- {
- return (llfinite(mV[VX]) && llfinite(mV[VY]) && llfinite(mV[VZ]));
- }
- // Clear and Assignment Functions
- inline void LLVector3::clear(void)
- {
- mV[0] = 0.f;
- mV[1] = 0.f;
- mV[2] = 0.f;
- }
- inline void LLVector3::setZero(void)
- {
- mV[0] = 0.f;
- mV[1] = 0.f;
- mV[2] = 0.f;
- }
- inline void LLVector3::clearVec(void)
- {
- mV[0] = 0.f;
- mV[1] = 0.f;
- mV[2] = 0.f;
- }
- inline void LLVector3::zeroVec(void)
- {
- mV[0] = 0.f;
- mV[1] = 0.f;
- mV[2] = 0.f;
- }
- inline void LLVector3::set(F32 x, F32 y, F32 z)
- {
- mV[VX] = x;
- mV[VY] = y;
- mV[VZ] = z;
- }
- inline void LLVector3::set(const LLVector3 &vec)
- {
- mV[0] = vec.mV[0];
- mV[1] = vec.mV[1];
- mV[2] = vec.mV[2];
- }
- inline void LLVector3::set(const F32 *vec)
- {
- mV[0] = vec[0];
- mV[1] = vec[1];
- mV[2] = vec[2];
- }
- // deprecated
- inline void LLVector3::setVec(F32 x, F32 y, F32 z)
- {
- mV[VX] = x;
- mV[VY] = y;
- mV[VZ] = z;
- }
- // deprecated
- inline void LLVector3::setVec(const LLVector3 &vec)
- {
- mV[0] = vec.mV[0];
- mV[1] = vec.mV[1];
- mV[2] = vec.mV[2];
- }
- // deprecated
- inline void LLVector3::setVec(const F32 *vec)
- {
- mV[0] = vec[0];
- mV[1] = vec[1];
- mV[2] = vec[2];
- }
- inline F32 LLVector3::normalize(void)
- {
- F32 mag = fsqrtf(mV[0]*mV[0] + mV[1]*mV[1] + mV[2]*mV[2]);
- F32 oomag;
- if (mag > FP_MAG_THRESHOLD)
- {
- oomag = 1.f/mag;
- mV[0] *= oomag;
- mV[1] *= oomag;
- mV[2] *= oomag;
- }
- else
- {
- mV[0] = 0.f;
- mV[1] = 0.f;
- mV[2] = 0.f;
- mag = 0;
- }
- return (mag);
- }
- // deprecated
- inline F32 LLVector3::normVec(void)
- {
- F32 mag = fsqrtf(mV[0]*mV[0] + mV[1]*mV[1] + mV[2]*mV[2]);
- F32 oomag;
- if (mag > FP_MAG_THRESHOLD)
- {
- oomag = 1.f/mag;
- mV[0] *= oomag;
- mV[1] *= oomag;
- mV[2] *= oomag;
- }
- else
- {
- mV[0] = 0.f;
- mV[1] = 0.f;
- mV[2] = 0.f;
- mag = 0;
- }
- return (mag);
- }
- // LLVector3 Magnitude and Normalization Functions
- inline F32 LLVector3::length(void) const
- {
- return fsqrtf(mV[0]*mV[0] + mV[1]*mV[1] + mV[2]*mV[2]);
- }
- inline F32 LLVector3::lengthSquared(void) const
- {
- return mV[0]*mV[0] + mV[1]*mV[1] + mV[2]*mV[2];
- }
- inline F32 LLVector3::magVec(void) const
- {
- return fsqrtf(mV[0]*mV[0] + mV[1]*mV[1] + mV[2]*mV[2]);
- }
- inline F32 LLVector3::magVecSquared(void) const
- {
- return mV[0]*mV[0] + mV[1]*mV[1] + mV[2]*mV[2];
- }
- inline BOOL LLVector3::inRange( F32 min, F32 max ) const
- {
- return mV[0] >= min && mV[0] <= max &&
- mV[1] >= min && mV[1] <= max &&
- mV[2] >= min && mV[2] <= max;
- }
- inline LLVector3 operator+(const LLVector3 &a, const LLVector3 &b)
- {
- LLVector3 c(a);
- return c += b;
- }
- inline LLVector3 operator-(const LLVector3 &a, const LLVector3 &b)
- {
- LLVector3 c(a);
- return c -= b;
- }
- inline F32 operator*(const LLVector3 &a, const LLVector3 &b)
- {
- return (a.mV[0]*b.mV[0] + a.mV[1]*b.mV[1] + a.mV[2]*b.mV[2]);
- }
- inline LLVector3 operator%(const LLVector3 &a, const LLVector3 &b)
- {
- return LLVector3( a.mV[1]*b.mV[2] - b.mV[1]*a.mV[2], a.mV[2]*b.mV[0] - b.mV[2]*a.mV[0], a.mV[0]*b.mV[1] - b.mV[0]*a.mV[1] );
- }
- inline LLVector3 operator/(const LLVector3 &a, F32 k)
- {
- F32 t = 1.f / k;
- return LLVector3( a.mV[0] * t, a.mV[1] * t, a.mV[2] * t );
- }
- inline LLVector3 operator*(const LLVector3 &a, F32 k)
- {
- return LLVector3( a.mV[0] * k, a.mV[1] * k, a.mV[2] * k );
- }
- inline LLVector3 operator*(F32 k, const LLVector3 &a)
- {
- return LLVector3( a.mV[0] * k, a.mV[1] * k, a.mV[2] * k );
- }
- inline bool operator==(const LLVector3 &a, const LLVector3 &b)
- {
- return ( (a.mV[0] == b.mV[0])
- &&(a.mV[1] == b.mV[1])
- &&(a.mV[2] == b.mV[2]));
- }
- inline bool operator!=(const LLVector3 &a, const LLVector3 &b)
- {
- return ( (a.mV[0] != b.mV[0])
- ||(a.mV[1] != b.mV[1])
- ||(a.mV[2] != b.mV[2]));
- }
- inline bool operator<(const LLVector3 &a, const LLVector3 &b)
- {
- return (a.mV[0] < b.mV[0]
- || (a.mV[0] == b.mV[0]
- && (a.mV[1] < b.mV[1]
- || ((a.mV[1] == b.mV[1])
- && a.mV[2] < b.mV[2]))));
- }
- inline const LLVector3& operator+=(LLVector3 &a, const LLVector3 &b)
- {
- a.mV[0] += b.mV[0];
- a.mV[1] += b.mV[1];
- a.mV[2] += b.mV[2];
- return a;
- }
- inline const LLVector3& operator-=(LLVector3 &a, const LLVector3 &b)
- {
- a.mV[0] -= b.mV[0];
- a.mV[1] -= b.mV[1];
- a.mV[2] -= b.mV[2];
- return a;
- }
- inline const LLVector3& operator%=(LLVector3 &a, const LLVector3 &b)
- {
- LLVector3 ret( a.mV[1]*b.mV[2] - b.mV[1]*a.mV[2], a.mV[2]*b.mV[0] - b.mV[2]*a.mV[0], a.mV[0]*b.mV[1] - b.mV[0]*a.mV[1]);
- a = ret;
- return a;
- }
- inline const LLVector3& operator*=(LLVector3 &a, F32 k)
- {
- a.mV[0] *= k;
- a.mV[1] *= k;
- a.mV[2] *= k;
- return a;
- }
- inline const LLVector3& operator*=(LLVector3 &a, const LLVector3 &b)
- {
- a.mV[0] *= b.mV[0];
- a.mV[1] *= b.mV[1];
- a.mV[2] *= b.mV[2];
- return a;
- }
- inline const LLVector3& operator/=(LLVector3 &a, F32 k)
- {
- F32 t = 1.f / k;
- a.mV[0] *= t;
- a.mV[1] *= t;
- a.mV[2] *= t;
- return a;
- }
- inline LLVector3 operator-(const LLVector3 &a)
- {
- return LLVector3( -a.mV[0], -a.mV[1], -a.mV[2] );
- }
- inline F32 dist_vec(const LLVector3 &a, const LLVector3 &b)
- {
- F32 x = a.mV[0] - b.mV[0];
- F32 y = a.mV[1] - b.mV[1];
- F32 z = a.mV[2] - b.mV[2];
- return fsqrtf( x*x + y*y + z*z );
- }
- inline F32 dist_vec_squared(const LLVector3 &a, const LLVector3 &b)
- {
- F32 x = a.mV[0] - b.mV[0];
- F32 y = a.mV[1] - b.mV[1];
- F32 z = a.mV[2] - b.mV[2];
- return x*x + y*y + z*z;
- }
- inline F32 dist_vec_squared2D(const LLVector3 &a, const LLVector3 &b)
- {
- F32 x = a.mV[0] - b.mV[0];
- F32 y = a.mV[1] - b.mV[1];
- return x*x + y*y;
- }
- inline LLVector3 projected_vec(const LLVector3 &a, const LLVector3 &b)
- {
- LLVector3 project_axis = b;
- project_axis.normalize();
- return project_axis * (a * project_axis);
- }
- inline LLVector3 lerp(const LLVector3 &a, const LLVector3 &b, F32 u)
- {
- return LLVector3(
- a.mV[VX] + (b.mV[VX] - a.mV[VX]) * u,
- a.mV[VY] + (b.mV[VY] - a.mV[VY]) * u,
- a.mV[VZ] + (b.mV[VZ] - a.mV[VZ]) * u);
- }
- inline BOOL LLVector3::isNull() const
- {
- if ( F_APPROXIMATELY_ZERO > mV[VX]*mV[VX] + mV[VY]*mV[VY] + mV[VZ]*mV[VZ] )
- {
- return TRUE;
- }
- return FALSE;
- }
- inline void update_min_max(LLVector3& min, LLVector3& max, const LLVector3& pos)
- {
- for (U32 i = 0; i < 3; i++)
- {
- if (min.mV[i] > pos.mV[i])
- {
- min.mV[i] = pos.mV[i];
- }
- if (max.mV[i] < pos.mV[i])
- {
- max.mV[i] = pos.mV[i];
- }
- }
- }
- inline F32 angle_between(const LLVector3& a, const LLVector3& b)
- {
- LLVector3 an = a;
- LLVector3 bn = b;
- an.normalize();
- bn.normalize();
- F32 cosine = an * bn;
- F32 angle = (cosine >= 1.0f) ? 0.0f :
- (cosine <= -1.0f) ? F_PI :
- (F32)acos(cosine);
- return angle;
- }
- inline BOOL are_parallel(const LLVector3 &a, const LLVector3 &b, F32 epsilon)
- {
- LLVector3 an = a;
- LLVector3 bn = b;
- an.normalize();
- bn.normalize();
- F32 dot = an * bn;
- if ( (1.0f - fabs(dot)) < epsilon)
- {
- return TRUE;
- }
- return FALSE;
- }
- inline std::ostream& operator<<(std::ostream& s, const LLVector3 &a)
- {
- s << "{ " << a.mV[VX] << ", " << a.mV[VY] << ", " << a.mV[VZ] << " }";
- return s;
- }
- #endif