maths3D.h

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#ifndef _MATHS3D_H_
#define _MATHS3D_H_
 
 
// 3D base structutes

typedef struct
{
    u16 x;
    u16 y;
    u16 z;
} Vect3D_u16;

typedef struct
{
    s16 x;
    s16 y;
    s16 z;
} Vect3D_s16;

typedef struct
{
    u32 x;
    u32 y;
    u32 z;
} Vect3D_u32;

typedef struct
{
    s32 x;
    s32 y;
    s32 z;
} Vect3D_s32;

typedef struct
{
    fix16 x;
    fix16 y;
    fix16 z;
} Vect3D_f16;

typedef struct
{
    fix32 x;
    fix32 y;
    fix32 z;
} Vect3D_f32;

typedef struct
{
    Vect3D_f16 a;
    Vect3D_f16 b;
    Vect3D_f16 c;
} Mat3D_f16;

typedef struct
{
    Vect3D_f32 a;
    Vect3D_f32 b;
    Vect3D_f32 c;
} Mat3D_f32;
 
 
// 4D base structures

typedef struct
{
    fix16 x;
    fix16 y;
    fix16 z;
    fix16 w;
} Vect4D_f16;

typedef struct
{
    fix32 x;
    fix32 y;
    fix32 z;
    fix32 w;
} Vect4D_f32;

typedef struct
{
    Vect4D_f16 a;
    Vect4D_f16 b;
    Vect4D_f16 c;
    Vect4D_f16 d;
} Mat4D_f16;

typedef struct
{
    Vect4D_f32 a;
    Vect4D_f32 b;
    Vect4D_f32 c;
    Vect4D_f32 d;
} Mat4D_f32;
 
 
// short alias

typedef Vect3D_u16 V3u16;
typedef Vect3D_s16 V3s16;
typedef Vect3D_u32 V3u32;
typedef Vect3D_s32 V3s32;
typedef Vect3D_f16 V3f16;
typedef Vect3D_f32 V3f32;

typedef Vect4D_f16 V4f16;
typedef Vect4D_f32 V4f32;

typedef Mat3D_f16 M3f16;
typedef Mat3D_f32 M3f32;
typedef Mat4D_f16 M4f16;
typedef Mat4D_f32 M4f32;
 
 
// advanced 3D structures

typedef struct
{
    V2u16 viewport;
    fix16 camDist;
    V3f16 light;
    u16 lightEnabled;
} Context3D;

typedef V3f16 Translation3D;

typedef V3f16 Rotation3D;

typedef struct
{
    u16 rebuildMat;
    Translation3D* translation;
    Rotation3D* rotation;
    M3f16 mat;
    M3f16 matInv;
    V3f16 cameraInv;
    V3f16 lightInv;
} Transformation3D;

void M3D_reset(void);

void M3D_setLightEnabled(u16 enabled);
u16  M3D_getLightEnabled(void);

void M3D_setViewport(u16 w, u16 h);
void M3D_setCamDistance(fix16 value);
void M3D_setLightXYZ(fix16 x, fix16 y, fix16 z);
void M3D_setLight(V3f16* value);

void M3D_resetTransform(Transformation3D* t);

void M3D_setTransform(Transformation3D* tr, Translation3D* t, Rotation3D *r);

void M3D_setTranslation(Transformation3D* t, fix16 x, fix16 y, fix16 z);
void M3D_setRotation(Transformation3D* t, fix16 x, fix16 y, fix16 z);

void M3D_combineTransform(Transformation3D* left, Transformation3D* right, Transformation3D* result);
void M3D_combineTranslationLeft(Translation3D* left, Transformation3D* right, Transformation3D* result);
void M3D_combineTranslationRight(Transformation3D* left, Translation3D* right, Transformation3D* result);

void M3D_buildMat3D(Transformation3D* t);
void M3D_buildMat3DOnly(Transformation3D* t);
void M3D_buildMat3DExtras(Transformation3D* t);

void M3D_translate(Transformation3D* t, V3f16* vertices, u16 numv);
void M3D_rotate(Transformation3D* t, const V3f16* src, V3f16* dest, u16 numv);
void M3D_rotateInv(Transformation3D* t, const V3f16* src, V3f16* dest);
void M3D_transform(Transformation3D* t, const V3f16* src, V3f16* dest, u16 numv);

void M3D_project_f16(const V3f16* src, V2f16* dest, u16 numv);
void M3D_project_s16(const V3f16* src, V2s16* dest, u16 numv);
 
 
#endif // _MATHS3D_H_