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#ifndef __VEC3F_HH_
#define __VEC3F_HH_
#include <stdlib.h>
#include <math.h>
//CAPI:verb SqrDistancePt3
#define PF_SQUARE(_x) ((_x)*(_x))
#define PF_MIN2(a,b) ((a) < (b) ? (a) : (b))
#define PF_MAX2(a,b) ((a) > (b) ? (a) : (b))
#define PF_MIN3(a,b,c) ((a) < (b) ? PF_MIN2(a,c) : PF_MIN2(b,c))
#define PF_MAX3(a,b,c) ((a) > (b) ? PF_MAX2(a,c) : PF_MAX2(b,c))
#define PF_MIN4(a,b,c,d) ((a) < (b) ? PF_MIN3(a,c,d) : PF_MIN3(b,c,d))
#define PF_MAX4(a,b,c,d) ((a) > (b) ? PF_MAX3(a,c,d) : PF_MAX3(b,c,d))
#define PF_CLAMP(_x, _lo, _hi) \
(((_x) < (_lo)) ? (_lo) : (_x) > (_hi) ? (_hi) : (_x))
/*
* PF_ABS is faster than calling fabsf
* PF_ABSLT etc are faster than (PF_ABS(x1) < x2)
*/
#define PF_ABS(_x1) ((_x1 < 0) ? -(_x1) : (_x1))
#define PF_ABSLT(_x1,_x2) ((_x1) < (_x2) && -(_x1) < (_x2))
#define PF_ABSGT(_x1,_x2) ((_x1) > (_x2) || -(_x1) > (_x2))
#define PF_ABSLE(_x1,_x2) ((_x1) <= (_x2) && -(_x1) <= (_x2))
#define PF_ABSGE(_x1,_x2) ((_x1) >= (_x2) || -(_x1) >= (_x2))
/*
* Speed oriented macros
*/
#define PF_PI 3.14159265358979323846f /* F for SP float */
#define PF_PI_D 3.14159265358979323846 /* slower DP for more precision */
#define PF_DEG2RAD(x) ((x)*PF_PI /180.0f)
#define PF_DEG2RAD_D(x) ((x)*PF_PI_D/180.0)
#define PF_RAD2DEG(x) ((x)*180.0f/PF_PI)
#define PF_RAD2DEG_D(x) ((x)*180.0 /PF_PI_D)
#define PF_HUGEVAL 3.40282347e+37f
/* macro for fast square roots */
/* thresholds chosen so it's no worse than pfSqrt() */
#define PF_SQRT1(_x) \
(((_x) > 0.9996f && (_x) < 1.001f) ? \
0.5f + 0.5f*(_x) : \
pfSqrt(_x))
#define PF_1OVERSQRT1(_x) \
(((_x) > 0.9996f && (_x) < 1.001f) ? \
1.5f - 0.5f*(_x) : \
1.0f/pfSqrt(_x))
struct Vec3f {
// PFSTRUCT_DECLARE
public:
float vec[3];
public:
// constructors and destructors
//CAPI:private
Vec3f(float _x, float _y, float _z) { set(_x, _y, _z); }
Vec3f(float *_p) { set(_p); }
Vec3f() {};
public:
// sets and gets
//CAPI:arrayclass
//CAPI:verb SetVec3
void set(float _x, float _y, float _z) {
vec[0] = _x;
vec[1] = _y;
vec[2] = _z;
}
void set(float *_p){
vec[0]=_p[0];
vec[1]=_p[1];
vec[2]=_p[2];
}
public:
// other functions
//CAPI:verb
void copy(const Vec3f& _v) { *this = _v; }
int equal(const Vec3f& _v) const {
return (vec[0] == _v[0] &&
vec[1] == _v[1] &&
vec[2] == _v[2]);
}
int almostEqual(const Vec3f& _v, float _tol) const;
void negate(const Vec3f& _v) {
vec[0] = -_v[0];
vec[1] = -_v[1];
vec[2] = -_v[2];
}
float dot(const Vec3f& _v) const {
return (vec[0] * _v[0] +
vec[1] * _v[1] +
vec[2] * _v[2]);
}
void add(const Vec3f& _v1, const Vec3f& _v2) {
vec[0] = _v1[0] + _v2[0];
vec[1] = _v1[1] + _v2[1];
vec[2] = _v1[2] + _v2[2];
}
void sub(const Vec3f& _v1, const Vec3f& _v2) {
vec[0] = _v1[0] - _v2[0];
vec[1] = _v1[1] - _v2[1];
vec[2] = _v1[2] - _v2[2];
}
void scale(float _s, const Vec3f& _v) {
vec[0] = _s * _v[0];
vec[1] = _s * _v[1];
vec[2] = _s * _v[2];
}
void addScaled(const Vec3f& _v1, float _s, const Vec3f& _v2) {
vec[0] = _v1[0] + _s * _v2[0];
vec[1] = _v1[1] + _s * _v2[1];
vec[2] = _v1[2] + _s * _v2[2];
}
void combine(float _a, const Vec3f& _v1, float _b, const Vec3f& _v2) {
vec[0] = _a * _v1[0] + _b * _v2[0];
vec[1] = _a * _v1[1] + _b * _v2[1];
vec[2] = _a * _v1[2] + _b * _v2[2];
}
float sqrDistance(const Vec3f& _v) const {
return (PF_SQUARE(vec[0] - _v[0]) +
PF_SQUARE(vec[1] - _v[1]) +
PF_SQUARE(vec[2] - _v[2]));
}
void norm(const Vec3f& _v1, const Vec3f& _v2, const Vec3f& _v3){
Vec3f s1,s2;
s1 = _v1-_v2;
s2 = _v3-_v2;
cross(s1,s2);
normalize();
}
float normalize(){
float len=length();
if(len==0) this->set(len,len,len);
vec[0]/=len; vec[1]/=len; vec[2]/=len;
return len;
}
float length() const{
return sqrt(PF_SQUARE(vec[0]) +
PF_SQUARE(vec[1]) +
PF_SQUARE(vec[2]));
}
//CAPI:verb DistancePt3
float distance(const Vec3f& _v) const{
return sqrt(this->sqrDistance(_v));
}
void cross(const Vec3f& v1, const Vec3f& v2){
float temp[3];
temp[0] = (v1[1] * v2[2]) - (v1[2] * v2[1]);
temp[1] = (v1[2] * v2[0]) - (v1[0] * v2[2]);
temp[2] = (v1[0] * v2[1]) - (v1[1] * v2[0]);
set(temp);
}
void cross(const Vec3f& v2){
float temp[3];
temp[0] = (vec[1] * v2[2]) - (vec[2] * v2[1]);
temp[1] = (vec[2] * v2[0]) - (vec[0] * v2[2]);
temp[2] = (vec[0] * v2[1]) - (vec[1] * v2[0]);
set(temp);
}
/*CAPI:verb XformVec3
void xformVec(const Vec3f& _v, const pfMatrix& _m);
//CAPI:verb XformPt3
void xformPt(const Vec3f& _v, const pfMatrix& _m);
//CAPI:verb FullXformPt3
void fullXformPt(const Vec3f& _v, const pfMatrix& _m);*/
public:
// Operators
float& operator [](int i) { return vec[i]; }
const float& operator [](int i) const { return vec[i]; }
int operator ==(const Vec3f& _v) const {
return vec[0] == _v[0] && vec[1] == _v[1] && vec[2] == _v[2];
}
int operator !=(const Vec3f& _v) const {
return !(*this == _v);
}
public:
// Vec3f operators (N.B. return by value can be slow)
Vec3f operator -() const {
return Vec3f(-vec[0], -vec[1], -vec[2]);
}
Vec3f operator +(const Vec3f& _v) const {
return Vec3f(vec[0]+_v[0], vec[1]+_v[1], vec[2]+_v[2]);
}
Vec3f operator -(const Vec3f& _v) const {
return Vec3f(vec[0]-_v[0], vec[1]-_v[1], vec[2]-_v[2]);
}
friend inline Vec3f operator *(float _s, const Vec3f&);
friend inline Vec3f operator *(const Vec3f& _v, float _s);
friend inline Vec3f operator /(const Vec3f& _v, float _s);
// friend inline Vec3f operator *(const Vec3f& _v, const pfMatrix& _m);
public:
// Assignment Operators
Vec3f& operator =(const Vec3f& _v) {
vec[0] = _v[0];
vec[1] = _v[1];
vec[2] = _v[2];
return *this;
}
Vec3f& operator *=(float _s) {
vec[0] *= _s;
vec[1] *= _s;
vec[2] *= _s;
return *this;
}
Vec3f& operator /=(float _s) {
_s = 1.0/_s;
return *this *= _s;
}
Vec3f& operator +=(const Vec3f& _v) {
vec[0] += _v[0];
vec[1] += _v[1];
vec[2] += _v[2];
return *this;
}
Vec3f& operator -=(const Vec3f& _v) {
vec[0] -= _v[0];
vec[1] -= _v[1];
vec[2] -= _v[2];
return *this;
}
};
inline Vec3f operator *(float _s, const Vec3f& _v) {
return Vec3f(_v[0]*_s, _v[1]*_s, _v[2]*_s);
}
inline Vec3f operator *(const Vec3f& _v, float _s) {
return Vec3f(_v[0]*_s, _v[1]*_s, _v[2]*_s);
}
inline Vec3f operator /(const Vec3f& _v, float _s) {
_s = 1.0f/_s;
return Vec3f(_v[0]*_s, _v[1]*_s, _v[2]*_s);
}
//inline Vec3f operator *(const Vec3f& _v, const pfMatrix& _m) {
// transform as point (w=1), assuming affine transformation
// i.e. does not use slower dst.xformFullPt().
// Vec3f dst; dst.xformPt(_v, _m); return dst;
//}
#endif
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