1 #ifndef GMATH_VEC_H_

2 #define GMATH_VEC_H_

3

4 #include <math.h>

5

6 namespace gph {

7

8 class Vector4;

9 class Matrix4x4;

10

11 class Vector3 {

12 public:

13 float x, y, z;

14

15 Vector3() : x(0), y(0), z(0) {}

16 Vector3(float x_, float y_, float z_) : x(x_), y(y_), z(z_) {}

17 Vector3(const Vector4 &v);

18

19 inline void normalize();

20 inline float &operator[] (int idx);

21 inline const float &operator[] (int idx) const;

22 };

23

24

25 class Vector4 {

26 public:

27 float x, y, z, w;

28

29 Vector4() : x(0), y(0), z(0), w(0) {}

30 Vector4(float x_, float y_, float z_, float w_) : x(x_), y(y_), z(z_), w(w_) {}

31 Vector4(const Vector3 &v);

32

33 inline void normalize();

34 inline float &operator[] (int idx);

35 inline const float &operator[] (int idx) const;

36 };

37

38 // ---- Vector3 functions ----

39 inline Vector3 operator +(const Vector3 &a, const Vector3 &b);

40 inline Vector3 operator -(const Vector3 &a, const Vector3 &b);

41 inline Vector3 operator *(const Vector3 &a, const Vector3 &b);

42 inline Vector3 operator /(const Vector3 &a, const Vector3 &b);

43 inline Vector3 operator *(const Vector3 &v, float s);

44 inline Vector3 operator *(float s, const Vector3 &v);

45 inline Vector3 operator /(const Vector3 &v, float s);

46 inline Vector3 operator /(float s, const Vector3 &v);

47 inline Vector3 &operator +=(Vector3 &a, const Vector3 &b);

48 inline Vector3 &operator -=(Vector3 &a, const Vector3 &b);

49 inline Vector3 &operator *=(Vector3 &a, const Vector3 &b);

50 inline Vector3 &operator /=(Vector3 &a, const Vector3 &b);

51 inline Vector3 &operator *=(Vector3 &v, float s);

52 inline Vector3 &operator /=(Vector3 &v, float s);

53

54 Vector3 operator *(const Vector3 &v, const Matrix4x4 &m);

55 Vector3 operator *(const Matrix4x4 &m, const Vector3 &v);

56

57 inline bool operator ==(const Vector3 &a, const Vector3 &b);

58 inline bool operator !=(const Vector3 &a, const Vector3 &b);

59

60 inline float dot(const Vector3 &a, const Vector3 &b);

61 inline Vector3 cross(const Vector3 &a, const Vector3 &b);

62 inline float length(const Vector3 &v);

63 inline float length_sq(const Vector3 &v);

64 inline Vector3 normalize(const Vector3 &v);

65

66 inline Vector3 reflect(const Vector3 &v, const Vector3 &n);

67 inline Vector3 refract(const Vector3 &v, const Vector3 &n, float ior);

68 inline Vector3 refract(const Vector3 &v, const Vector3 &n, float from_ior, float to_ior);

69

70 inline Vector3 distance(const Vector3 &a, const Vector3 &b);

71 inline Vector3 distance_sq(const Vector3 &a, const Vector3 &b);

72 inline Vector3 faceforward(const Vector3 &n, const Vector3 &vi, const Vector3 &ng);

73

74 }

75

76 #endif /* GMATH_VEC_H_ */