http://technet.microsoft.com/zh-cn/bb205546

Describes a three-component vector including operator overloads and type casts.

Syntax

typedef struct D3DXVECTOR3 {
  FLOAT x;
  FLOAT y;
  FLOAT z;
} D3DXVECTOR3, *LPD3DXVECTOR3;

Members

x

Type: FLOAT

The x-component.

y

Type: FLOAT

The y-component.

z

Type: FLOAT

The z-component.

Remarks

D3DXVECTOR3 Extensions

D3DXVECTOR3 has the following C++ extensions.

1. #ifdef __cplusplus
2. typedef struct D3DXVECTOR3 : public D3DVECTOR
3. {
4. public:
5.     D3DXVECTOR3() {};
6.     D3DXVECTOR3( CONST FLOAT * );
7.     D3DXVECTOR3( CONST D3DVECTOR& );
8.     D3DXVECTOR3( CONST D3DXFLOAT16 * );
9.     D3DXVECTOR3( FLOAT x, FLOAT y, FLOAT z );
10.  
11.     // casting
12.     operator FLOAT* ();
13.     operator CONST FLOAT* () const;
14.  
15.     // assignment operators
16.     D3DXVECTOR3& operator += ( CONST D3DXVECTOR3& );
17.     D3DXVECTOR3& operator -= ( CONST D3DXVECTOR3& );
18.     D3DXVECTOR3& operator *= ( FLOAT );
19.     D3DXVECTOR3& operator /= ( FLOAT );
20.  
21.     // unary operators
22.     D3DXVECTOR3 operator + () const;
23.     D3DXVECTOR3 operator - () const;
24.  
25.     // binary operators
26.     D3DXVECTOR3 operator + ( CONST D3DXVECTOR3& ) const;
27.     D3DXVECTOR3 operator - ( CONST D3DXVECTOR3& ) const;
28.     D3DXVECTOR3 operator * ( FLOAT ) const;
29.     D3DXVECTOR3 operator / ( FLOAT ) const;
30.  
31.     friend D3DXVECTOR3 operator * ( FLOAT, CONST struct D3DXVECTOR3& );
32.  
33.     BOOL operator == ( CONST D3DXVECTOR3& ) const;
34.     BOOL operator != ( CONST D3DXVECTOR3& ) const;
35.  
36. } D3DXVECTOR3, *LPD3DXVECTOR3;
37.  
38. #else //!__cplusplus
39. typedef struct _D3DVECTOR D3DXVECTOR3, *LPD3DXVECTOR3;
40. #endif //!__cplusplus
41.  
42. typedef struct D3DXVECTOR3_16F
43. {
44. #ifdef __cplusplus
45. public:
46.     D3DXVECTOR3_16F() {};
47.     D3DXVECTOR3_16F( CONST FLOAT * );
48.     D3DXVECTOR3_16F( CONST D3DVECTOR& );
49.     D3DXVECTOR3_16F( CONST D3DXFLOAT16 * );
50.     D3DXVECTOR3_16F( CONST D3DXFLOAT16 &x, CONST D3DXFLOAT16 &y, CONST D3DXFLOAT16 &z );
51.  
52.     // casting
53.     operator D3DXFLOAT16* ();
54.     operator CONST D3DXFLOAT16* () const;
55.  
56.     // binary operators
57.     BOOL operator == ( CONST D3DXVECTOR3_16F& ) const;
58.     BOOL operator != ( CONST D3DXVECTOR3_16F& ) const;
59.  
60. public:
61. #endif //__cplusplus
62.     D3DXFLOAT16 x, y, z;
63.  
64. } D3DXVECTOR3_16F, *LPD3DXVECTOR3_16F;