我正在制作一款产生3点尖星(3PS)和4点尖星(4PS)的游戏。您必须使3PS落在右侧,而4PS落在左侧。我正在使用if语句来检查它们是否掉入了正确的路线,但无法正常工作。我为3PS创建了star类,并为3PS类创建了4PS类。我有一个变量,每当一颗星星降到屏幕下方时,该变量就会增加,但3PS似乎还可以,但是4PS会增加4PS和3PS的变量。我怎样才能解决这个问题?
这是我的代码
if (0 <= starW && starW <= (.5 * dimension[0]) && starH <= 0) {
if (star[a] instanceof fourStar) {
if (count4Check == false) {
count4C++;
count4Check = true;
starAdded = 0;
Log.i("count4C", String.valueOf(count4C));
}count4Check = false;
}
}
if (0 <= starW && starW <= (.5 * dimension[0]) && starH <= 0) {
if (star[a] instanceof Star) {
if (count3Check == false) {
count3W++;
count3Check = true;
starAdded = 0;
Log.i("count3W", String.valueOf(count3W));
}count3Check = false;
}
}
if ((.5 * dimension[0]) <= starW && starW <= dimension[0] && starH <= 0) {
if (star[a] instanceof Star) {
if (count3Check == false) {
count3C++;
count3Check = true;
starAdded = 0;
Log.i("count3C", String.valueOf(count3C));
}count3Check = false;
}
}
if ((.5 * dimension[0]) <= starW && starW <= dimension[0] && starH <= 0) {
if (star[a] instanceof fourStar) {
if (count4Check == false) {
count4W++;
count4Check = true;
starAdded = 0;
Log.i("count4W", String.valueOf(count4W));
}count4Check = false;
}
}
这是logcat
03-21 20:06:36.620 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 3 star added
03-21 20:06:39.623 24716-25725/com.example.james.sata I/count3C﹕ 9
03-21 20:06:39.713 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 4 star added
03-21 20:06:42.276 24716-25725/com.example.james.sata I/count4C﹕ 2
03-21 20:06:42.276 24716-25725/com.example.james.sata I/count3W﹕ 5
03-21 20:06:42.356 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 3 star added
03-21 20:06:45.149 24716-25725/com.example.james.sata I/count3W﹕ 6
03-21 20:06:45.239 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 4 star added
03-21 20:06:48.592 24716-25725/com.example.james.sata I/count4C﹕ 3
03-21 20:06:48.592 24716-25725/com.example.james.sata I/count3W﹕ 7
03-21 20:06:48.692 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 4 star added
03-21 20:06:51.726 24716-25725/com.example.james.sata I/count4C﹕ 4
03-21 20:06:51.726 24716-25725/com.example.james.sata I/count3W﹕ 8
03-21 20:06:51.776 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 3 star added
03-21 20:06:54.779 24716-25725/com.example.james.sata I/count3C﹕ 10
03-21 20:06:54.859 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 3 star added
03-21 20:07:10.446 24716-25725/com.example.james.sata I/count3C﹕ 11
03-21 20:07:10.526 24716-25725/com.example.james.sata I/MyGLRenderer﹕ 4 star added
03-21 20:07:25.772 24716-25725/com.example.james.sata I/count3C﹕ 12
03-21 20:07:25.772 24716-25725/com.example.james.sata I/count4W﹕ 3
最佳答案
四星是星的子类,因此如果
if (star[a] instanceof Star) {
例如,您可能具有以下代码:
boolnea isOnLeft = starW <= (.5 * dimension[0]);
boolean isOut = starH <= 0;
if (star[a] instanceof fourStar) {
if (isOnLeft && isOut) {
...
}
} else { //3ps
if (!isOnLeft && isOut) {
...
}
}
但是,如果您检查实际课程,那不是很OO。
您应该具有两个子类别3PS和4PS的Star类。然后在star类中,定义抽象方法
boolean shouldCount(position)
,在3PS中,如果位置在屏幕的右侧和屏幕外,则应实现shouldCount()以返回true,在4PS中则相反。然后,您只需调用shouldCount
并提高得分。