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#pragma once
#define _USE_MATH_DEFINES
#include <math.h>
#include "Vector3f.h"
class Matrix4f
{
public:
enum
{
TX=3,
TY=7,
TZ=11,
D0=0, D1=5, D2=10, D3=15,
SX=D0, SY=D1, SZ=D2,
W=D3
};
Matrix4f() { Identity(); }
float& operator [] ( int a_N ) { return cell[a_N]; }
void Identity()
{
cell[1] = cell[2] = cell[TX] = cell[4] = cell[6] = cell[TY] =
cell[8] = cell[9] = cell[TZ] = cell[12] = cell[13] = cell[14] = 0;
cell[D0] = cell[D1] = cell[D2] = cell[W] = 1;
}
void Init( Vector3f a_Pos, float a_RX, float a_RY, float a_RZ )
{
Matrix4f t;
t.RotateX( a_RZ );
RotateY( a_RY );
Concatenate( t );
t.RotateZ( a_RX );
Concatenate( t );
Translate( a_Pos );
}
void RotateX( float a_RX )
{
float sx = (float)sin( a_RX * M_PI / 180 );
float cx = (float)cos( a_RX * M_PI / 180 );
Identity();
cell[5] = cx, cell[6] = sx, cell[9] = -sx, cell[10] = cx;
}
void RotateY( float a_RY )
{
float sy = (float)sin( a_RY * M_PI / 180 );
float cy = (float)cos( a_RY * M_PI / 180 );
Identity ();
cell[0] = cy, cell[2] = -sy, cell[8] = sy, cell[10] = cy;
}
void RotateZ( float a_RZ )
{
float sz = (float)sin( a_RZ * M_PI / 180 );
float cz = (float)cos( a_RZ * M_PI / 180 );
Identity ();
cell[0] = cz, cell[1] = sz, cell[4] = -sz, cell[5] = cz;
}
void Translate( Vector3f a_Pos ) { cell[TX] += a_Pos.x; cell[TY] += a_Pos.y; cell[TZ] += a_Pos.z; }
void SetTranslation( Vector3f a_Pos ) { cell[TX] = a_Pos.x; cell[TY] = a_Pos.y; cell[TZ] = a_Pos.z; }
void Concatenate( const Matrix4f& m2 )
{
Matrix4f res;
int c;
for ( c = 0; c < 4; c++ ) for ( int r = 0; r < 4; r++ )
res.cell[r * 4 + c] = cell[r * 4] * m2.cell[c] +
cell[r * 4 + 1] * m2.cell[c + 4] +
cell[r * 4 + 2] * m2.cell[c + 8] +
cell[r * 4 + 3] * m2.cell[c + 12];
for ( c = 0; c < 16; c++ ) cell[c] = res.cell[c];
}
Vector3f Transform( const Vector3f& v ) const
{
float x = cell[0] * v.x + cell[1] * v.y + cell[2] * v.z + cell[3];
float y = cell[4] * v.x + cell[5] * v.y + cell[6] * v.z + cell[7];
float z = cell[8] * v.x + cell[9] * v.y + cell[10] * v.z + cell[11];
return Vector3f( x, y, z );
}
void Invert()
{
Matrix4f t;
int h, i;
float tx = -cell[3], ty = -cell[7], tz = -cell[11];
for ( h = 0; h < 3; h++ ) for ( int v = 0; v < 3; v++ ) t.cell[h + v * 4] = cell[v + h * 4];
for ( i = 0; i < 11; i++ ) cell[i] = t.cell[i];
cell[3] = tx * cell[0] + ty * cell[1] + tz * cell[2];
cell[7] = tx * cell[4] + ty * cell[5] + tz * cell[6];
cell[11] = tx * cell[8] + ty * cell[9] + tz * cell[10];
}
Vector3f GetXColumn() { return Vector3f( cell[0], cell[1], cell[2] ); }
Vector3f GetYColumn() { return Vector3f( cell[4], cell[5], cell[6] ); }
Vector3f GetZColumn() { return Vector3f( cell[8], cell[9], cell[10] ); }
void SetXColumn( const Vector3f & a_X )
{
cell[0] = a_X.x;
cell[1] = a_X.y;
cell[2] = a_X.z;
}
void SetYColumn( const Vector3f & a_Y )
{
cell[4] = a_Y.x;
cell[5] = a_Y.y;
cell[6] = a_Y.z;
}
void SetZColumn( const Vector3f & a_Z )
{
cell[8] = a_Z.x;
cell[9] = a_Z.y;
cell[10] = a_Z.z;
}
float cell[16];
};
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