private void timer1_Tick(object sender, EventArgs e)
{
if (_isMoving)
{
MoveTank();
Invalidate();
}
if (_isFiring)
{
if (!_isBulletFlying)
{
_bulletX = _tankX 15;
_bulletY = _tankY 15;
_bulletDirection = _tankDirection;
_isBulletFlying = true;
}
MoveBullet();
Invalidate();
}
}控制方向键：
private void Form1_KeyDown(object sender, KeyEventArgs e)
{
switch (e.KeyCode)
{
case Keys.Up:
_tankDirection = 0;
_isMoving = true;
break;
case Keys.Down:
_tankDirection = 1;
_isMoving = true;
break;
case Keys.Left:
_tankDirection = 2;
_isMoving = true;
break;
case Keys.Right:
_tankDirection = 3;
_isMoving = true;
break;
case Keys.Space:
_isFiring = true;
break;
}
}引用方法1：
private void MoveBullet()
{
switch (_bulletDirection)
{
case 0:
_bulletY -= BulletSpeed;
break;
case 1:
_bulletY = BulletSpeed;
break;
case 2:
_bulletX -= BulletSpeed;
break;
case 3:
_bulletX = BulletSpeed;
break;
}
if (_bulletX < 0 || _bulletX > ClientSize.Width || _bulletY < 0 || _bulletY > ClientSize.Height)
{
_isBulletFlying = false;
}
}引用方法2：
private void MoveTank()
{
switch (_tankDirection)
{
case 0:
_tankY -= TankSpeed;
break;
case 1:
_tankY = TankSpeed;
break;
case 2:
_tankX -= TankSpeed;
break;
case 3:
_tankX = TankSpeed;
break;
}
if (_tankX < 0) _tankX = 0;
if (_tankX > ClientSize.Width - 40) _tankX = ClientSize.Width - 40;
if (_tankY < 0) _tankY = 0;
if (_tankY > ClientSize.Height - 40) _tankY = ClientSize.Height - 40;
}制作生成子弹：
private void DrawBullet(Graphics g)
{
g.FillEllipse(Brushes.Red, _bulletX, _bulletY, 20, 20);
}制作坦克图案：
private void DrawTank(Graphics g)
{
var tankRect = new Rectangle(_tankX, _tankY, 40, 40);
g.FillRectangle(Brushes.Pink, tankRect);
switch (_tankDirection)
{
case 0:
g.FillRectangle(Brushes.Black, _tankX 18, _tankY, 4, 20);
break;
case 1:
g.FillRectangle(Brushes.Black, _tankX 18, _tankY 20, 4, 20);
break;
case 2:
g.FillRectangle(Brushes.Black, _tankX, _tankY 18, 20, 4);
break;
case 3:
g.FillRectangle(Brushes.Black, _tankX 20, _tankY 18, 20, 4);
break;
}
}窗体初始化：
private const int TankSpeed = 5;
private const int BulletSpeed = 10;
private bool _isMoving;
private bool _isFiring;
private bool _isBulletFlying;
private int _bulletX;
private int _bulletY;
private int _bulletDirection;
private int _tankX;
private int _tankY;
private int _tankDirection;
public Form1()
{
InitializeComponent();
SetStyle(ControlStyles.OptimizedDoubleBuffer, true);
_tankX = ClientSize.Width / 2;
_tankY = ClientSize.Height / 2;
}
protected override void OnPaint(PaintEventArgs e)
{
base.OnPaint(e);
DrawTank(e.Graphics);
if (_isBulletFlying)
{
DrawBullet(e.Graphics);
}
}
