2Arton - ошиблись разделом, вам в раздел Болтовня.
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// при инициализации объекта
D3DXVECTOR3 right( 1, 0, 0 );
D3DXVECTOR3 up( 0, 1, 0 );
D3DXVECTOR3 look( 0, 0, 1 );
D3DXVECTOR3 pos( 0, 0, 0 );
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// В цикле
D3DXMATRIX out;
// Делаем оси ортогональными
D3DXVec3Normalize(&look, &look);
D3DXVec3Cross(&up, &look, &right);
D3DXVec3Normalize(&up, &up);
D3DXVec3Cross(&right, &up, &look);
D3DXVec3Normalize(&right, &right);
float x = -D3DXVec3Dot(&right, &pos);
float y = -D3DXVec3Dot(&up, &pos);
float z = -D3DXVec3Dot(&look, &pos);
// Строим матрицу
out._11 = right.x;
out._12 = up.x;
out._13 = look.x;
out._14 = 0.0f;
out._21 = right.y;
out._22 = up.y;
out._23 = look.y;
out._24 = 0.0f;
out._31 = right.z;
out._32 = up.z;
out._33 = look.z;
out._34 = 0.0f;
out._41 = x;
out._42 = y;
out._43 = z;
out._44 = 1.0f;
device->SetTransform( D3DTS_WORLD, &out );
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// Поворот
D3DXMATRIX result,pitchMatrix,yawMatrix,rollMatrix;
D3DXMatrixRotationAxis( &pitchMatrix, &D3DXVECTOR3( 1, 0, 0 ), pitchAngleRadians );
D3DXMatrixRotationAxis( &yawMatrix, &D3DXVECTOR3( 0, 1, 0 ), yawAngleRadians );
D3DXMatrixRotationAxis( &rollMatrix, &D3DXVECTOR3( 0, 0, 1 ), rollAngleRadians );
result = pitchMatrix * yawMatrix * rollMatrix;
D3DXVec3TransformCoord( &right, &D3DXVECTOR3( 1, 0, 0 ), &result );
D3DXVec3TransformCoord( &look, &D3DXVECTOR3( 0, 1, 0 ), &result );
D3DXVec3TransformCoord( &up, &D3DXVECTOR3( 0, 0, 1 ), &result );
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// Перемещение в зависимости от направления
pos += right * xSpeed;
pos += up * ySpeed;
pos += look * zSpeed;
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// Перемещение по осям
pos += xSpeed;
pos += ySpeed;
pos += zSpeed;
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