我正在使用slick2D创建一个测试游戏，现在我正在使用矩形和交叉方法进行命中检测。 我为玩家接触的每个平台创建了两个矩形;一个用于查看玩家是从侧面还是底部击中平台，另一个像素高的矩形用于查看角色是否站在平台上。
问题是，如果我将更多类似于平台（一个像素长矩形）的内容添加到更新类，例如：
if(playplathit.intersects(plat1top))
{
falling = false;
}
当您进入平台所处的状态时，您会收到此错误：
Fri Dec 13 22:57:31 EST 2013 ERROR:Game.update() failure - check the game code.
org.newdawn.slick.SlickException: Game.update() failure - check the game code.
at org.newdawn.slick.GameContainer.updateAndRender(Ga meContainer.java:669)
at org.newdawn.slick.AppGameContainer.gameLoop(AppGam eContainer.java:411)
at org.newdawn.slick.AppGameContainer.start(AppGameCo ntainer.java:321)
at javagame.Game.main(Game.java:34)
我的猜测是我有点过载Java或Slick。我也确信我正在以最糟糕的方式进行命中检测，因为我没有遵循指南。 以下是更新类中没有任何plattop if语句的代码：
public class Play extends BasicGameState
{
int[] duration = {200,200};
float playerX = 100;
float playerY = 353;
float screenX = 0;
float screenY = 0;
float plat1X = 0;
float plat2X = 174;
float plat3X = 461;
float plat4X = 618;
float plat5X = 881;
float plat6X = 1233;
float plat7X = 1438;
float plat8X = 1754;
float vertspd = 0.0f;
Animation playeranistart, idleani, runforani, runbackani, jumpani;
boolean falling;
boolean jumping;
boolean rightside = false;
boolean leftside = false;
Rectangle playplathit, plat1, plat2, plat3, plat4, plat5, plat6, plat7, plat8, plat1top, plat2top, plat3top, plat4top, plat5top, plat6top, plat7top, plat8top;
public Play(int state)
{
}
public void player()
{
}
public void init(GameContainer gc, StateBasedGame sbg) throws SlickException
{
Image[] idle = {new Image("res/player.png"), new Image("res/player.png")};
idleani = new Animation(idle,duration,false);
Image[] startidle = {new Image("res/player.png"), new Image("res/player.png")};
playeranistart = new Animation(startidle,duration,false);
Image[] run1 = {new Image("res/playerrun1.png"), new Image("res/playerrun1.png")};
runforani = new Animation(run1,duration,false);
Image[] run2 = {new Image("res/playerrun2.png"), new Image("res/playerrun2.png")};
runbackani = new Animation(run2,duration,false);
}
public void render(GameContainer gc, StateBasedGame sbg, Graphics g) throws SlickException
{
Image lvl1 = new Image("res/testlvl.png");
playplathit = new Rectangle(playerX, playerY, 15, 39);
plat1 = new Rectangle(plat1X, 393, 597, 8);
plat1top = new Rectangle(plat1X, 392, 597, 1);
plat2 = new Rectangle(plat2X, 325, 247, 5);
plat2top = new Rectangle(plat2X, 324, 247, 1);
plat3 = new Rectangle(plat3X, 265, 78, 6);
plat3top = new Rectangle(plat3X, 264, 78, 1);
plat4 = new Rectangle(plat4X, 232, 141, 5);
plat4top = new Rectangle(plat4X, 231, 141, 1);
plat5 = new Rectangle(plat5X, 393, 755, 8);
plat5top = new Rectangle(plat5X, 392, 755, 1);
plat6 = new Rectangle(plat6X, 357, 214, 44);
plat6top = new Rectangle(plat6X, 356, 214, 1);
plat7 = new Rectangle(plat7X, 330, 219, 70);
plat7top = new Rectangle(plat7X, 329, 219, 1);
plat8 = new Rectangle(plat8X, 393, 243, 8);
plat8top = new Rectangle(plat8X, 392, 243, 1);
g.drawImage(lvl1, screenX,screenY);
playeranistart.draw(playerX,playerY);
g.setColor(Color.red);
g.draw(playplathit);
g.draw(plat1);
g.draw(plat2);
g.draw(plat3);
g.draw(plat4);
g.draw(plat5);
g.draw(plat6);
g.draw(plat7);
g.draw(plat8);
g.draw(plat1top);
g.draw(plat2top);
g.draw(plat3top);
g.draw(plat4top);
g.draw(plat5top);
g.draw(plat6top);
g.draw(plat7top);
g.draw(plat8top);
}
public void update(GameContainer gc, StateBasedGame sbg, int delta) throws SlickException
{
Input input = gc.getInput();
if(jumping == false)
{
vertspd = 0;
}
if((input.isKeyDown(Input.KEY_D) == false) || (input.isKeyDown(Input.KEY_A) == false)|| (input.isKeyDown(Input.KEY_W) == false))
{
playeranistart = idleani;
}
if(input.isKeyDown(Input.KEY_D))
{
screenX = screenX - 3.3f;
plat1X = plat1X - 3.3f;
plat2X = plat2X - 3.3f;
plat3X = plat3X - 3.3f;
plat4X = plat4X - 3.3f;
plat5X = plat5X - 3.3f;
plat6X = plat6X - 3.3f;
plat7X = plat7X - 3.3f;
plat8X = plat8X - 3.3f;
playeranistart = runforani;
if(playplathit.intersects(plat1) || playplathit.intersects(plat2) || playplathit.intersects(plat3) || playplathit.intersects(plat4) || playplathit.intersects(plat5) || playplathit.intersects(plat6) || playplathit.intersects(plat7) || playplathit.intersects(plat8))
{
if(rightside)
{
plat1X = plat1X - 3.3f;
plat2X = plat2X - 3.3f;
plat3X = plat3X - 3.3f;
plat4X = plat4X - 3.3f;
plat5X = plat5X - 3.3f;
plat6X = plat6X - 3.3f;
plat7X = plat7X - 3.3f;
plat8X = plat8X - 3.3f;
screenX = screenX - 3.3f;
rightside = false;
}
else
{
plat1X = plat1X + 3.3f;
plat2X = plat2X + 3.3f;
plat3X = plat3X + 3.3f;
plat4X = plat4X + 3.3f;
plat5X = plat5X + 3.3f;
plat6X = plat6X + 3.3f;
plat7X = plat7X + 3.3f;
plat8X = plat8X + 3.3f;
screenX = screenX + 3.3f;
leftside = true;
}
}
}
if(input.isKeyDown(Input.KEY_A))
{
playeranistart = runbackani;
plat1X = plat1X + 3.3f;
plat2X = plat2X + 3.3f;
plat3X = plat3X + 3.3f;
plat4X = plat4X + 3.3f;
plat5X = plat5X + 3.3f;
plat6X = plat6X + 3.3f;
plat7X = plat7X + 3.3f;
plat8X = plat8X + 3.3f;
screenX = screenX + 3.3f;
if(playplathit.intersects(plat1) || playplathit.intersects(plat2) || playplathit.intersects(plat3) || playplathit.intersects(plat4) || playplathit.intersects(plat5) || playplathit.intersects(plat6) || playplathit.intersects(plat7) || playplathit.intersects(plat8))
{
if(leftside)
{
plat1X = plat1X + 3.3f;
plat2X = plat2X + 3.3f;
plat3X = plat3X + 3.3f;
plat4X = plat4X + 3.3f;
plat5X = plat5X + 3.3f;
plat6X = plat6X + 3.3f;
plat7X = plat7X + 3.3f;
plat8X = plat8X + 3.3f;
screenX = screenX + 3.3f;
leftside = false;
}
else
{
plat1X = plat1X - 3.3f;
plat2X = plat2X - 3.3f;
plat3X = plat3X - 3.3f;
plat4X = plat4X - 3.3f;
plat5X = plat5X - 3.3f;
plat6X = plat6X - 3.3f;
plat7X = plat7X - 3.3f;
plat8X = plat8X - 3.3f;
screenX = screenX - 3.3f;
rightside = true;
}
}
}
if(input.isKeyDown(Input.KEY_W))
{
if(jumping != true)
{
vertspd = 1.0f * (delta);
playerY = playerY - vertspd;
}
}
}
public int getID()
{
return 1;
}
}
感谢您的帮助。