Question

我用TweetEngine（X和Y位置）一次插值两个值，但只更新了X ...

访问者类：

private static class PersonTweenAccessor implements TweenAccessor<Person> {

    public static final int POSITION_XY = 1;

    @Override
    public int getValues(Person target, int tweenType, float[] returnValues) {
        switch(tweenType) {
            case POSITION_XY:
                returnValues[0] = target.position.x;
                returnValues[1] = target.position.y;
                return 1;

            default:
                return -1;
        }
    }

    @Override
    public void setValues(Person target, int tweenType, float[] newValues) {
        switch(tweenType) {
            case POSITION_XY:
                target.position.set(newValues[0], newValues[1]);
                Gdx.app.log("position", newValues[0] + "," + newValues[1]);
                break;
        }
    }

}

补间创建：

Gdx.app.log("Tween start", "From (" + position.x + "," + position.y + ") to (" + targetPoint.x + "," + targetPoint.y + ")");
Tween.to(this, PersonTweenAccessor.POSITION_XY, distance / speed)
                .target(targetPoint.x, targetPoint.y)
                .ease(TweenEquations.easeNone)
                .setCallback(positionTweenCallback)
                .start(GameWorld.tweenManager);

输出（设置器中设置的日志）是这样的（修剪以提高可读性）：

Tween start: From (50.0,20.0) to (283,25)
position: 51.305202,20.0
position: 52.14488,20.0
position: 53.2509,20.0
...
position: 280.70465,20.0
position: 281.80902,20.0
position: 282.85034,20.0
position: 283.0,25.0

如您所见，第一个值是插值的，但第二个值不是，直到最后一次访问，才将其设置为目标值。

Answer 1

您的import java.text.SimpleDateFormat; import java.util.Date; public class DateDifferentExample { public static void main(String[] args) { String dateStart = "01/14/2012 09:29:58"; String dateStop = "01/15/2012 10:31:48"; //HH converts hour in 24 hours format (0-23), day calculation SimpleDateFormat format = new SimpleDateFormat("MM/dd/yyyy HH:mm:ss"); Date d1 = null; Date d2 = null; try { d1 = format.parse(dateStart); d2 = format.parse(dateStop); //in milliseconds long diff = d2.getTime() - d1.getTime(); long diffSeconds = diff / 1000 % 60; long diffMinutes = diff / (60 * 1000) % 60; long diffHours = diff / (60 * 60 * 1000) % 24; long diffDays = diff / (24 * 60 * 60 * 1000); System.out.print(diffDays + " days, "); System.out.print(diffHours + " hours, "); System.out.print(diffMinutes + " minutes, "); System.out.print(diffSeconds + " seconds."); } catch (Exception e) { e.printStackTrace(); } }方法需要返回2而不是1，因为您有两个要修改的值。

通用Tween引发一次几个值

1 个答案: