在 2d 平台游戏中,玩家有时会被困在方块中
我正在用 Java 制作 2d 平台游戏,由于某种原因,当玩家跳向平台时,有时会卡住。这是问题的图像:
如您所见,我正在跳转到顶部平台,但卡住了。
这是我的坠落/跳跃的碰撞代码:
if (guy.getJumpState() == false) {
if (canExecuteMovement(0, 8)) {
...
onGround = false;
if (guy.getY() > this.getParent().getHeight() / 2 - 100) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setY(platform[i].getY() - 8);
}
}
} else {
// or just move the guy if not.
guy.moveY(8);
}
} else {
onGround = true;
}
} else {
if (canExecuteMovement(0, -12)) {
if (guy.getY() < this.getParent().getHeight() / 2 - 100) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setY(platform[i].getY() + 12);
}
}
} else {
// or just move the guy if not.
guy.moveY(-12);
}
jumpCount++;
if (jumpCount >= 20) {
jumpCount = 0;
guy.setJumpState(false);
}
} else {
jumpCount = 0;
guy.setJumpState(false);
}
}
左右移动的代码:
if (guy.getDirection() == "left") {
if (canExecuteMovement(-4, 0)) {
if (guy.getX() < this.getParent().getWidth() / 2) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setX(platform[i].getX() + 4);
}
}
} else {
// or just move the guy if not.
guy.moveX(-4);
}
}
} else if (guy.getDirection() == "right") {
if (canExecuteMovement(4, 0)) {
if (guy.getX() > this.getParent().getWidth() / 2) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setX(platform[i].getX() - 4);
}
}
} else {
// or just move the guy if not.
guy.moveX(4);
}
}
}
这是 canExecuteMovement 函数:
private boolean canExecuteMovement(int xChange, int yChange) {
int projectedX = guy.getX() + xChange;
int projectedY = guy.getY() + yChange;
Rectangle projectedBounds = new Rectangle(projectedX, projectedY, guy.getWidth(), guy.getHeight());
for (int i = 0; i < platformCount; i++) {
if (projectedBounds.intersects(platform[i].getBounds()) && platform[i].getVisibility() == true) {
return false;
}
}
return true;
}
我真的不知道如何解决这个问题,希望我能得到一些启发。
I am making a 2d Platformer in Java, and for some reason, when the player jumps towards a platform, it gets stuck sometimes. Here is an image of the problem:
As you see, I was making a jump to the top of the platform, but it got stuck.
Here is my collison code for falling/jumping:
if (guy.getJumpState() == false) {
if (canExecuteMovement(0, 8)) {
...
onGround = false;
if (guy.getY() > this.getParent().getHeight() / 2 - 100) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setY(platform[i].getY() - 8);
}
}
} else {
// or just move the guy if not.
guy.moveY(8);
}
} else {
onGround = true;
}
} else {
if (canExecuteMovement(0, -12)) {
if (guy.getY() < this.getParent().getHeight() / 2 - 100) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setY(platform[i].getY() + 12);
}
}
} else {
// or just move the guy if not.
guy.moveY(-12);
}
jumpCount++;
if (jumpCount >= 20) {
jumpCount = 0;
guy.setJumpState(false);
}
} else {
jumpCount = 0;
guy.setJumpState(false);
}
}
Code for moving left and right:
if (guy.getDirection() == "left") {
if (canExecuteMovement(-4, 0)) {
if (guy.getX() < this.getParent().getWidth() / 2) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setX(platform[i].getX() + 4);
}
}
} else {
// or just move the guy if not.
guy.moveX(-4);
}
}
} else if (guy.getDirection() == "right") {
if (canExecuteMovement(4, 0)) {
if (guy.getX() > this.getParent().getWidth() / 2) {
// if you are in the middle, move the platforms.
for (int i = 0; i < platformCount; i++) {
if (platform[i].getVisibility() == true) {
platform[i].setX(platform[i].getX() - 4);
}
}
} else {
// or just move the guy if not.
guy.moveX(4);
}
}
}
And here is canExecuteMovement function:
private boolean canExecuteMovement(int xChange, int yChange) {
int projectedX = guy.getX() + xChange;
int projectedY = guy.getY() + yChange;
Rectangle projectedBounds = new Rectangle(projectedX, projectedY, guy.getWidth(), guy.getHeight());
for (int i = 0; i < platformCount; i++) {
if (projectedBounds.intersects(platform[i].getBounds()) && platform[i].getVisibility() == true) {
return false;
}
}
return true;
}
I really dont know how to tackle this problem, hopefully I can get some enlightenment.
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您需要分别跟踪
x
和y
的允许/拒绝移动代码。发生的情况是,如果用户无法进一步向右移动,代码就会完全阻止他。然而,他应该仍然能够向上或向下移动。考虑拆分代码中的条件,以便在分配新的移动向量时,它分别设置
x
和y
,检查中移动的能力x
和y
分别。You need to track your allow/deny movement code for
x
andy
separately. What's happening is that if the user can't move any further right the code stops him altogether. However, he should STILL be able to move up or down.Consider splitting up the conditionals in your code so that when it is assigning the new movement vectors, it sets
x
andy
separately, checking for the ability to move inx
andy
individually.