我正在使用 XNA 在 C# 中开发游戏，并且由于 Nick Gravelyn 的教程，我一直在学习 C# 中的程序，但我遇到了障碍。当我使用 Nick 的碰撞系统时，我没有使用他的玩家代码。我使用的是基于我修改过的 Fatso784 的教程。因此，我无法使修改后的碰撞系统正常工作。我已经知道它会将玩家推出某些方 block ，但我需要它更坚固，因为玩家仍然可以偶尔穿过墙壁。我很确定我对碰撞的处理有误，但碰撞可能有点糊状。所以这是我的玩家类的相关代码，移动代码:
public void Move()
{
pos.X = bounds.X;
pos.Y = bounds.Y;
offsetPos.X = bounds.Width;
offsetPos.Y = bounds.Height;
if (frameCount % delay == 0)
{
switch (direction)
{
case "stand":
if (sideCollide == "none")
{
Equalize(2);
}
else if (sideCollide == "left")
{
speed += 1f;
}
else if (sideCollide == "right")
{
speed -= 1f;
}
bounds.X += (int)speed;
if (frameCount / delay >= 8)
frameCount = 0;
srcBounds = new Rectangle(frameCount / delay * 64, 0, 64, 64);
break;
case "left":
if (sideCollide != "left")
{
if (speed > -maxspeed)
{
speed -= acceleration;
}
else if (speed < -maxspeed)
{
speed -= acceleration;
speed += drag;
Equalize(2);
}
speed += friction;
}
bounds.X += (int)speed;
if (frameCount / delay >= 4)
frameCount = 0;
srcBounds = new Rectangle(frameCount / delay * 64, 64, 64, 64);
break;
case "right":
if (sideCollide != "right")
{
if (speed < maxspeed)
{
speed += acceleration;
}
else if (speed > maxspeed)
{
speed += acceleration;
speed -= drag;
Equalize(2);
}
speed -= friction;
}
bounds.X += (int)speed;
if (frameCount / delay >= 4)
frameCount = 0;
srcBounds = new Rectangle(frameCount / delay * 64, 64, 64, 64);
break;
case "up":
if (speed > -4 && speed < 4)
srcBounds.Y = 128;
else
srcBounds.Y = 64;
if (srcBounds.Y == 0 || srcBounds.Y == 128)
{
if (jumpCount < 2)
{
if (frameCount / delay >= 9)
frameCount = 0;
}
else if (jumpCount > 2 && jumpCount <= 10)
{
if (frameCount / delay > 3)
frameCount = 2 * delay;
}
else if (jumpCount > 10 && jumpCount <= 18)
{
if (frameCount / delay > 5)
frameCount = 4 * delay;
}
else if (jumpCount > 18)
{
if (frameCount / delay >= 9)
frameCount = 0;
}
srcBounds = new Rectangle(frameCount / delay * 64, 128, 64, 64);
}
else if (srcBounds.Y == 64)
{
if (frameCount / delay >= 4)
frameCount = 0;
if (jumpCount <= 10)
srcBounds = new Rectangle((frameCount / delay) / 2 * 64, 64, 64, 64);
else
srcBounds = new Rectangle(frameCount / delay * 64, 64, 64, 64);
}
if (jumpCount == 0)
startY = bounds.Y;
bounds = new Rectangle(bounds.X + (int)speed,
(jumpCount - 10) * (jumpCount - 10) - 100 + startY, 64, 64);
jumpCount++;
if (bounds.Y > startY)
{
bounds.Y = startY;
direction = "stand";
jumpCount = 0;
}
break;
}
}
frameCount++;
}
以及碰撞代码:
public void CollideOutside(TileMap tilemap)
{
Point cell = Engine.PointCell(PlayerCenter);
Point? upLeft = null, Up = null, upRight = null, Right = null, downRight = null, Down = null, downLeft = null, Left = null;
if (cell.Y > 0)
{
Up = new Point(cell.X, cell.Y - 1);
}
if (cell.Y < tilemap.collisionMap.HeightinPixels)
{
Down = new Point(cell.X, cell.Y + 1);
}
if (cell.X > 0)
{
Left = new Point(cell.X - 1, cell.Y);
}
if (cell.X < tilemap.collisionMap.WidthinPixels)
{
Right = new Point(cell.X + 1, cell.Y);
}
if (cell.X > 0 && cell.Y > 0)
{
upLeft = new Point(cell.X - 1, cell.Y - 1);
}
if (cell.X < tilemap.collisionMap.WidthinPixels - 1 && cell.Y > 0)
{
upRight = new Point(cell.X + 1, cell.Y - 1);
}
if (cell.X > 0 && cell.Y < tilemap.collisionMap.HeightinPixels - 1)
{
downLeft = new Point(cell.X - 1, cell.Y + 1);
}
if (cell.X < tilemap.collisionMap.WidthinPixels - 1 && cell.Y < tilemap.collisionMap.Height - 1)
{
downRight = new Point(cell.X + 1, cell.Y + 1);
}
if (Up != null && tilemap.collisionMap.GetCellIndex(Up.Value) == 1)
{
Rectangle rect = Engine.CreateCell(Up.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
}
}
if (Down != null && tilemap.collisionMap.GetCellIndex(Down.Value) == 1)
{
Rectangle rect = Engine.CreateCell(Down.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
}
}
if (Right != null && tilemap.collisionMap.GetCellIndex(Right.Value) == 1)
{
Rectangle rect = Engine.CreateCell(Right.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
speed = -1f;
sideCollide = "right";
}
else
{
sideCollide = "none";
}
}
if (Left != null && tilemap.collisionMap.GetCellIndex(Left.Value) == 1)
{
Rectangle rect = Engine.CreateCell(Left.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
speed = 1f;
sideCollide = "left";
}
else
{
sideCollide = "none";
}
}
if (upLeft != null && tilemap.collisionMap.GetCellIndex(upLeft.Value) == 1)
{
Rectangle rect = Engine.CreateCell(upLeft.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
}
}
if (upRight != null && tilemap.collisionMap.GetCellIndex(upRight.Value) == 1)
{
Rectangle rect = Engine.CreateCell(upRight.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
}
}
if (downLeft != null && Left != null && tilemap.collisionMap.GetCellIndex(downLeft.Value) == 1)
{
Rectangle rect = Engine.CreateCell(downLeft.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
speed = 1f;
sideCollide = "left";
}
}
if (downRight != null && Right != null && tilemap.collisionMap.GetCellIndex(downRight.Value) == 1)
{
Rectangle rect = Engine.CreateCell(downRight.Value);
Rectangle playerCell = Boundary;
if (rect.Intersects(playerCell))
{
speed = -1f;
sideCollide = "right";
}
}
if (Right == null && Left == null)
{
sideCollide = "none";
}
}
public Rectangle Boundary
{
get
{
Rectangle rect = bounds;
rect.X = (int)pos.X;
rect.Y = (int)pos.Y;
return rect;
}
}
那么我怎样才能改善碰撞呢？
最佳答案
这个答案主要是为了回应蒂姆的回答——因为他给出了非常错误的方法。 (你的问题是一个非常大的代码转储，我真的无法用那么多代码来找出错误。)
碰撞检测的诀窍 - “真正的”物理引擎执行此操作的方式 - 是始终将您的对象视为实体。您始终 - 每一帧 - 检查对象是否相互渗透，然后在它们相互渗透时分离它们。
如果您只测试移动越过对象的边界，您将错过碰撞。这包括您尝试通过捕捉到表面来预测和避免碰撞的任何方法。如果你这样做，你只是在要求浮点精度错误，让你溜进对象。
编辑: 当然，您的代码似乎都是基于整数的(Point 和 Rectangle)。所以至少浮点精度不应该成为问题。但也许你有一个 <你应该在哪里有一个<=或者类似的东西？
(此外，您在很多应该使用枚举的地方使用了字符串。)
关于c# - 我怎样才能让我的碰撞更稳固？，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/5987585/