小编Fa2*_*a2m的帖子

我做了一个简单的代码来获得跳球位置,但我肯定错过了一些东西,因为我得到了这个:

这是获取x和y位置的代码:

public Vector2f[] draw() {
    float x = 0, y = height; // height - float value from class constructor;
    ArrayList<Vector2f> graphic = new ArrayList<Vector2f>();
    for(;;){
        Vector2f a = new Vector2f(x, y);
        graphic.add(a);
        ySpeed -= 10;
        y += ySpeed*Math.cos(angle);
        x += xSpeed*Math.sin(angle);
        if(y <= 0){
            // float coef = -10 * y / ySpeed;
            // ySpeed = ((ySpeed + coef) * (-1) ) * bouncyness;
            ySpeed = (ySpeed * (-1)) * bouncyness;
            System.out.println(ySpeed + " " + y);
            y …