ol3d_matrix.h

#ifndef _OL3D_MATRIX_H_
#define _OL3D_MATRIX_H_

// 4x4 matrix
typedef float ol3d_matrix_t[16];

#define PI          3.1415926535898
#define R(angle)    ((angle) * PI/180)

#define MATRIX_UNIT {\
    1, 0, 0, 0,\
    0, 1, 0, 0,\
    0, 0, 1, 0,\
    0, 0, 0, 1 \
}
#define MATRIX_TRANSLATE(x, y, z) {\
    1, 0, 0, 0,\
    0, 1, 0, 0,\
    0, 0, 1, 0,\
    (x), (y), (z), 1 \
}

#define MATRIX_SCALE(x, y, z) {\
    (x), 0, 0, 0,\
    0, (y), 0, 0,\
    0, 0, (z), 0,\
    0, 0, 0, 1 \
}

#define MATRIX_ROTATE_X(a) {\
    1, 0, 0, 0,\
    0, cos(R(a)), sin(R(a)), 0,\
    0, -sin(R(a)), cos(R(a)), 0,\
    0, 0, 0, 1 \
}

#define MATRIX_ROTATE_Y(a) {\
    cos(R(a)), 0, sin(R(a)), 0,\
    0, 1, 0, 0,\
    -sin(R(a)), 0, cos(R(a)), 0,\
    0, 0, 0, 1 \
}

#define MATRIX_ROTATE_Z(a) {\
    cos(R(a)), sin(R(a)), 0, 0,\
    -sin(R(a)), cos(R(a)), 0, 0,\
    0, 0, 1, 0,\
    0, 0, 0, 1 \
}

#define M_AXIS_X    0x0001
#define M_AXIS_Y    0x0002
#define M_AXIS_Z    0x0004

extern void     ol3d_matrix_setUnit(ol3d_matrix_t a);
extern void     ol3d_matrix_setTranslate(ol3d_matrix_t a, float x, float y, float z);
extern void     ol3d_matrix_setScale(ol3d_matrix_t a, float x, float y, float z);
extern void     ol3d_matrix_setRotate(ol3d_matrix_t a, float angle, unsigned char axis);
extern void     ol3d_matrix_setPerspective(ol3d_matrix_t a, double fov, double aspect, double near, double far);
extern void     ol3d_matrix_copy(ol3d_matrix_t a, ol3d_matrix_t b);

extern void     ol3d_matrix_transpose(ol3d_matrix_t a);
extern float    ol3d_matrix_multi_chunk(ol3d_matrix_t a, ol3d_matrix_t b, unsigned char pos);
extern void     ol3d_matrix_multiply(ol3d_matrix_t a, ol3d_matrix_t b, ol3d_matrix_t c);
extern void     ol3d_matrix_translate(ol3d_matrix_t a, float x, float y, float z);
extern void     ol3d_matrix_scale(ol3d_matrix_t a, float x, float y, float z);
extern void     ol3d_matrix_rotate(ol3d_matrix_t a, float angle, unsigned char axis);
extern void     ol3d_matrix_multi_v3(ol3d_Vector3_t *a, ol3d_matrix_t b);

#endif