78 lines
2.1 KiB
C
78 lines
2.1 KiB
C
/** @file 4x4 matrix structure, including operators when compiling in C++ */
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#ifndef AI_MATRIX4X4_H_INC
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#define AI_MATRIX4X4_H_INC
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct aiMatrix3x3;
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// Set packing to 4
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#if defined(_MSC_VER) || defined(__BORLANDC__) || defined (__BCPLUSPLUS__)
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#pragma pack(push,4)
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#define PACK_STRUCT
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#elif defined( __GNUC__ )
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#define PACK_STRUCT __attribute__((packed))
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#else
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#error Compiler not supported
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#endif
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// ---------------------------------------------------------------------------
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/** Represents a column-major 4x4 matrix,
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* use this for homogenious coordinates
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*/
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// ---------------------------------------------------------------------------
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typedef struct aiMatrix4x4
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{
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#ifdef __cplusplus
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aiMatrix4x4 () :
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a1(1.0f), a2(0.0f), a3(0.0f), a4(0.0f),
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b1(0.0f), b2(1.0f), b3(0.0f), b4(0.0f),
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c1(0.0f), c2(0.0f), c3(1.0f), c4(0.0f),
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d1(0.0f), d2(0.0f), d3(0.0f), d4(1.0f){}
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aiMatrix4x4 ( float _a1, float _a2, float _a3, float _a4,
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float _b1, float _b2, float _b3, float _b4,
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float _c1, float _c2, float _c3, float _c4,
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float _d1, float _d2, float _d3, float _d4) :
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a1(_a1), a2(_a2), a3(_a3), a4(_a4),
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b1(_b1), b2(_b2), b3(_b3), b4(_b4),
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c1(_c1), c2(_c2), c3(_c3), c4(_c4),
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d1(_d1), d2(_d2), d3(_d3), d4(_d4)
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{}
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/** Constructor from 3x3 matrix. The remaining elements are set to identity. */
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explicit aiMatrix4x4( const aiMatrix3x3& m);
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aiMatrix4x4& operator *= (const aiMatrix4x4& m);
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aiMatrix4x4 operator* (const aiMatrix4x4& m) const;
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aiMatrix4x4& Transpose();
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aiMatrix4x4& Inverse();
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float Determinant() const;
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float* operator[](unsigned int p_iIndex);
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const float* operator[](unsigned int p_iIndex) const;
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#endif // __cplusplus
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float a1, a2, a3, a4;
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float b1, b2, b3, b4;
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float c1, c2, c3, c4;
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float d1, d2, d3, d4;
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} PACK_STRUCT aiMatrix4x4_t;
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// Reset packing
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#if defined(_MSC_VER) || defined(__BORLANDC__) || defined (__BCPLUSPLUS__)
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#pragma pack( pop )
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#endif
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#undef PACK_STRUCT
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#ifdef __cplusplus
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} // end extern "C"
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#endif // __cplusplus
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#endif // AI_MATRIX4X4_H_INC
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