1 #include <math.h>

2

3 inline float Vector3::length()

4 {

5 return sqrt(x * x + y * y + z * z);

6 }

7

8 inline float Vector3::lengthsq()

9 {

10 return x * x + y * y + z * z;

11 }

12

13 inline Vector3 operator +(const Vector3 &a, const Vector3 &b)

14 {

15 return Vector3(a.x + b.x, a.y + b.y, a.z + b.z);

16 }

17

18 inline Vector3 operator -(const Vector3 &a, const Vector3 &b)

19 {

20 return Vector3(a.x - b.x, a.y - b.y, a.z - b.z);

21 }

22

23 inline Vector3 operator *(const Vector3 &a, const Vector3 &b)

24 {

25 return Vector3(a.x * b.x, a.y * b.y, a.z * b.z);

26 }

27

28 inline Vector3 operator /(const Vector3 &a, const Vector3 &b)

29 {

30 return Vector3(a.x / b.x, a.y / b.y, a.z / b.z);

31 }

32

33

34 inline Vector3 operator -(const Vector3 &vec)

35 {

36 return Vector3(-vec.x, -vec.y, -vec.z);

37 }

38

39 inline Vector3 operator *(const Vector3 &vec, float s)

40 {

41 return Vector3(vec.x * s, vec.y * s, vec.z * s);

42 }

43

44 inline Vector3 operator /(const Vector3 &vec, float s)

45 {

46 return Vector3(vec.x / s, vec.y / s, vec.z / s);

47 }

48

49 inline float dot(const Vector3 &a, const Vector3 &b)

50 {

51 return a.x * b.x + a.y * b.y + a.z * b.z;

52 }

53

54 inline Vector3 cross(const Vector3 &a, const Vector3 &b)

55 {

56 return Vector3(a.y * b.z - a.z * b.y, a.z * b.x - a.x * b.z, a.x * b.y - a.y * b.x);

57 }

58

59 inline Vector3 reflect(const Vector3 &v, const Vector3 &n)

60 {

61 return n * (2.0 * dot(v, n)) - v;

62 }