java LWJGL让3D FPS相机跳跃

Question

所以我正在做我的第一个3D项目，一切都很顺利，直到我决定让FPS角色（相机）跳转。我尝试了一些方法，但直到我成功地做了一件大多数时候都有效的事情，它们看起来都不太好。现在的问题是“大部分时间”——应该是所有时间

问题是，当我连续点击跳转按钮时，它开始发狂。当我超过它时，我试图将位置设置回零，但有时仍然会出现异常，尽管不太常见。为了让它一直工作，有什么建议吗？（我使用的是OpenGL和java，没有引擎）

跳跃部分代码：

if (Keyboard.isKeyDown(Keyboard.KEY_SPACE) && !jumping
    && position.y >= temp) { //temp - floor height 
jumping = true;
}
gravity = (float) ((walkingSpeed * 0.00003) * delta);//delta - time
//System.out.println(delta);
if (position.y < temp) { //In the air
    speed = speed + gravity;
    position.y = position.y + speed;
}
if (jumping) {
    speed = speed - (float) ((walkingSpeed * 0.0006) * delta);
    position.y = position.y + speed;
    jumping = false;
}
if (position.y > temp) //**Supposed** to solve the problem
    position.y = temp;

Answer 1

代码中有许多问题与您描述的内容不同步：

1. 你几乎所有的东西都有相反的标志
2. 您正在测试的条件是总是评估为真（!jumping）

---

// Only start a jump while on the ground (position.y <= temp)
if (Keyboard.isKeyDown(Keyboard.KEY_SPACE) && position.y <= temp) {
  speed = speed + (float) ((walkingSpeed * 0.0006));
  // Don't care about the delta time when you jump, just add a fixed amount of
  // positive vertical velocity (which gravity will work out over time).
}

// You had gravity going the wrong direction initially
gravity = (float) -((walkingSpeed * 0.00003) * delta);

//System.out.println(delta);
speed      = speed + gravity;
position.y = position.y + speed;

if (position.y < temp) { // Don't sink into the ground
  position.y = temp;
  speed      = 0.0; // Scrub off acceleration due to gravity
}