//============================================================
public void Update()
{
Vector3 position = new Vector3(_position.X, _position.Y, _position.Z);
Vector3 target = new Vector3(_target.X, _target.Y, _target.Z);
_matrix.AssignNative(DxMatrix.LookAtLH(position, target, Vector3.UnitY));
}
//============================================================
// <T>向上/向下旋转</T>
//
// @param angle 角度
//============================================================
public void DoPitch(float angle)
{
SFloatVector3 axis = new SFloatVector3();
SFloatVector3 axisUp = new SFloatVector3(0, 1, 0);
axisUp.Cross(_direction, axis);
DxMatrix dxMatrix = DxMatrix.RotationAxis(new Vector3(axis.X, axis.Y, axis.Z), angle);
SFloatVector3 direction = new SFloatVector3();
// 旋转Y轴
SDxMatrix matrix = new SDxMatrix();
matrix.AssignNative(dxMatrix);
matrix.UpdateData();
matrix.Transform3x3Vector3(direction, _direction);
// 旋转方向
direction.Normalize();
_direction.Assign(direction);
UpdateTarget();
}