[英]Java Smooth 2D Rectangle collision?
大家好,我正在做一个迷宫游戏,我想弄清楚如何使2D碰撞变得流畅。 目前,我有一些非常糟糕的碰撞代码,因为我还没有做完这部分,所以它会出现故障,有时会撞到墙内,那么您就无法退出。
我的代码:
public void checkCollision() {
Rectangle player_rectangle = new Rectangle(player.getX(),player.getY(),32,32);
for(Wall wall : walls) {
Rectangle wall_rectangle = new Rectangle(wall.getX(), wall.getY(), 32,32);
if(player_rectangle.intersects(wall_rectangle)) {
if(player.xspeed == 1) {
player.xspeed = 0;
player.x -= 1.2;
} else {
if(player.xspeed == -1) {
player.xspeed = 0;
player.x += 1.2;
}
else
if(player.yspeed == 1) {
player.yspeed = 0;
player.y -= 1;
} else {
if(player.yspeed == -1) {
player.yspeed = 0;
player.y += 1;
}
}
}
}
}
}
有什么更好的方法来进行碰撞? 这是我将要拥有的地图类型的图片:
编辑:
新的碰撞代码:
if (player_rectangle.intersects(wall_rectangle)) {
Rectangle intersection = (Rectangle) player_rectangle.createIntersection(wall_rectangle);
if (player.xspeed > 0) {
player.x -= intersection.getWidth();
}
if (player.yspeed > 0) {
player.y -= intersection.getHeight();
}
if (player.xspeed < 0) {
player.x += intersection.getWidth();
}
if (player.yspeed < 0) {
player.y += intersection.getHeight();
}
Print(Integer.toString(intersection.width) + ", " + Integer.toString(intersection.height));
}
运动代码:
public void keyPressed(KeyEvent e) {
int key = e.getKeyCode();
if(key == KeyEvent.VK_LEFT) {
xspeed = -1;
} else {
if(key == KeyEvent.VK_RIGHT) {
xspeed = 1;
} else {
if(key == KeyEvent.VK_UP) {
yspeed = -1;
} else {
if(key == KeyEvent.VK_DOWN) {
yspeed = 1;
}
}
}
}
}
感谢你给与我的帮助。
您可以使用Rectangle.createIntersection(Rectangle)
。
如果玩家向正方向移动,只需从其位置减去所得Rectangle
的宽度和高度,如果向负方向移动,则将其相加。
不要将速度设置为零,这可能会导致播放器挂起。
编辑
if (playerRectangle.intersects(wallRectangle) {
Rectangle intersection = (Rectangle) playerRectangle.createIntersection(wallRectangle);
if (player.xspeed > 0) {
player.x -= intersection.getWidth();
}
if (player.yspeed > 0) {
player.y -= intersection.getHeight();
}
if (player.xspeed < 0) {
player.x += intersection.getWidth();
}
if (player.yspeed < 0) {
player.y += intersection.getHeight();
}
}
编辑2
据我所知,keyPressed仅在您按下某个键时触发,而不是在您释放它时触发。 像这样尝试:
private boolean up, down, left, right;
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KEyEvent.VK_UP) {
up = true;
}
...
}
public void keyReleased(KeyEvent e) {
if (e.getKeyCode() == KEyEvent.VK_UP) {
up = false;
}
...
}
// Call this in the mainthread
public void updateMovement() {
if (up) {
player.xspeed = 1;
}
...
}
因此,在每一帧中,您都要更新动作,移动播放器,然后检查碰撞。
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