Java LibGDX-增量时间有时会导致精灵在曲线移动时行为怪异

所以我想出了当你有3个点时，如何在曲线上移动物体。 我以如下曲线移动精灵：

以下代码在render方法中，该方法循环每个勾号。

    if (ship.isMoving()){
        // Normalized direction vector towards target
        Vector2 dir = ship.getEndPoint().cpy().sub(ship.getLinearVector()).nor();

        // Move towards target by adding direction vector multiplied by speed and delta time to linearVector
        ship.getLinearVector().add(dir.scl(2 * Gdx.graphics.getDeltaTime()));

        // calculate step based on progress towards target (0 -> 1)
        float step = 1 - (ship.getEndPoint().dst(ship.getLinearVector()) / ship.getDistanceToEndPoint());

        if (ship.getCurrentPerformingMove() != MoveType.FORWARD) {
            // step on curve (0 -> 1), first bezier point, second bezier point, third bezier point, temporary vector for calculations
            Bezier.quadratic(ship.getCurrentAnimationLocation(), step, ship.getStartPoint().cpy(),
                    ship.getInbetweenPoint().cpy(), ship.getEndPoint().cpy(), new Vector2());
        }
        else {
            Bezier.quadratic(ship.getCurrentAnimationLocation(), step, ship.getStartPoint().cpy(),
                    new Vector2(ship.getStartPoint().x, ship.getEndPoint().y), ship.getEndPoint().cpy(), new Vector2());
        }

        // check if the step is reached to the end, and dispose the movement
        if (step >= 0.99f) {
            ship.setX(ship.getEndPoint().x);
            ship.setY(ship.getEndPoint().y);
            ship.setMoving(false);
            System.out.println("ENDED MOVE AT  "+ ship.getX() + " " + ship.getY());
        }
        else {
            // process move
            ship.setX(ship.getCurrentAnimationLocation().x);
            ship.setY(ship.getCurrentAnimationLocation().y);
        }

        // tick rotation of the ship image
        if (System.currentTimeMillis() - ship.getLastAnimationUpdate() >= Vessel.ROTATION_TICK_DELAY) {
            ship.tickRotation();
        }
    }

当我运行这个时，80%的时间它运行平稳，没有问题，但有时它会运行，只是在两个移动之间有一些奇怪的延迟（如果我先做第一个曲线，然后再做另一个曲线），就像有些可疑的东西，我不明白

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我是否使用了错误的增量？

正如@Tenfour04对您的问题所做的评论。可能是垃圾收集器启动并造成了延迟。不要在更新/渲染循环内创建新对象

// instance variable tmp
private Vector2 tmp = new Vector2();

// dir is now a reference to tmp no new objects allocated
Vector2 dir = this.tmp.set(ship.getEndPoint()).sub(ship.getLinearVector()).nor();

// the same thing with Bezier.quadratic equation
// only the currentAnimationLocation and tmp will be modified in the method
Bezier.quadratic(
    ship.getCurrentAnimationLocation(), step, ship.getStartPoint(),
    ship.getInbetweenPoint(), ship.getEndPoint(), this.tmp
);

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您正在创建大量垃圾对象。可能是GC。避免在游戏循环中分配新对象。