跳过FOR循环中的特定迭代
在我使用Batch进行编程的游戏中，特定功能用于绘制带有预设图块的地图。这相当复杂，需要花费几秒钟的时间来绘制整个全彩图。
我正在尝试为播放器添加一个图标。我不想更改地图数据，而是希望完全在graphics子例程中实现它。
现在，将显示图标，但是它将整个图形行向后推一位。我想让它跳过播放器位于其上的图块，但是执行此操作的唯一方法似乎是执行与BASIC中的ye olde NEXT命令类似的操作。我不知道与此等效的批处理，因此我来这里寻求帮助。绘制播放器磁贴后，我需要跳过FOR循环的特定迭代。
如果没有大量上下文，这将毫无意义，但这是它的子例程：
:D
REM Draw tiles
IF /I %OSV% LSS 3 (
FOR /L %%G IN (0,1,31) DO (
REM Old tileset
IF "%2" == "1" IF "%%G" == "%X%" CALL :C 0C "i" & REM skip the rest
IF "!M%MAP%%1:~%%G,1!" == "0" CALL :C 00 " "
IF "!M%MAP%%1:~%%G,1!" == "1" CALL :C 2A "w"
IF "!M%MAP%%1:~%%G,1!" == "2" CALL :C 87 "S"
IF "!M%MAP%%1:~%%G,1!" == "3" CALL :C 6E "W"
IF "!M%MAP%%1:~%%G,1!" == "4" CALL :C 0A "T"
IF "!M%MAP%%1:~%%G,1!" == "5" CALL :C 0A "n"
IF "!M%MAP%%1:~%%G,1!" == "6" CALL :C 6E "H"
IF "!M%MAP%%1:~%%G,1!" == "7" CALL :C 91 "m"
IF "!M%MAP%%1:~%%G,1!" == "8" CALL :C 19 "m"
IF "!M%MAP%%1:~%%G,1!" == "9" CALL :C B3 "M"
IF "!M%MAP%%1:~%%G,1!" == "A" CALL :C 4C "m"
IF "!M%MAP%%1:~%%G,1!" == "B" CALL :C C4 "M"
IF "!M%MAP%%1:~%%G,1!" == "C" CALL :C 6E "O"
IF "!M%MAP%%1:~%%G,1!" == "D" CALL :C 6E "W"
IF "!M%MAP%%1:~%%G,1!" == "E" CALL :C 78 "W"
IF "!M%MAP%%1:~%%G,1!" == "F" CALL :C 0D "X"
IF "!M%MAP%%1:~%%G,1!" == "G" CALL :C 6E "E"
IF "!M%MAP%%1:~%%G,1!" == "H" CALL :C 48 "E"
IF "!M%MAP%%1:~%%G,1!" == "I" CALL :C 68 "n"
IF "!M%MAP%%1:~%%G,1!" == "J" CALL :C 6E "m"
IF "!M%MAP%%1:~%%G,1!" == "K" CALL :C E6 "W"
IF "!M%MAP%%1:~%%G,1!" == "L" CALL :C 6A "T"
IF "!M%MAP%%1:~%%G,1!" == "M" CALL :C 2A "w"
IF "!M%MAP%%1:~%%G,1!" == "N" CALL :C 87 "S"
IF "!M%MAP%%1:~%%G,1!" == "O" CALL :C 0D "i"
IF "!M%MAP%%1:~%%G,1!" == "P" CALL :C 6A "Y"
IF "!M%MAP%%1:~%%G,1!" == "Q" CALL :C BF "C"
)
)
GOTO :EOF
请注意，我删除了高级（“花式”）图块集，因为它增加了更多的复杂性，并且在此处无法正确显示。
绘制角色（第六行）之后，我需要跳过序列的其余部分，以防止其绘制玩家站在其上方的图块。
传递给函数的变量为：
- ％1-要绘制的Y值
- ％2-玩家是否使用此Y值
除了通过C函数向终端输出以外，没有任何输出，C函数仅绘制彩色字符。
任何想法都很棒。
编辑：这是一些没有播放器图标的示例输出。红色的琥珀色指示玩家的位置。我想用播放器的图标替换该位置的图块。
Overworld屏幕截图
沙漠截图
1 个答案:
答案 0 :(得分：0)
您没有创建MCVE，并且您的代码没有意义，因为如果它在第6 行之后停止，那么其余代码就没有用了，也不需要循环32次。因此，这只是一个例子
要在条件为真时阻止块运行，只需反转条件
package com.example.chinmayi.androiduberclone;
import android.Manifest;
import android.content.pm.PackageManager;
import android.location.Location;
import android.location.LocationListener;
import android.os.Handler;
import android.os.SystemClock;
import android.support.annotation.NonNull;
import android.support.annotation.Nullable;
import android.support.design.widget.Snackbar;
import android.support.v4.app.ActivityCompat;
import android.support.v4.app.FragmentActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.animation.Interpolator;
import android.view.animation.LinearInterpolator;
import android.widget.Toast;
import com.firebase.geofire.GeoFire;
import com.firebase.geofire.GeoLocation;
import com.github.kmenager.materialanimatedswitch.MaterialAnimatedSwitch;
import com.google.android.gms.common.ConnectionResult;
import com.google.android.gms.common.GooglePlayServicesUtil;
import com.google.android.gms.common.api.GoogleApiClient;
import com.google.android.gms.location.FusedLocationProviderClient;
import com.google.android.gms.location.LocationRequest;
import com.google.android.gms.location.LocationServices;
import com.google.android.gms.maps.CameraUpdate;
import com.google.android.gms.maps.CameraUpdateFactory;
import com.google.android.gms.maps.GoogleMap;
import com.google.android.gms.maps.OnMapReadyCallback;
import com.google.android.gms.maps.SupportMapFragment;
import com.google.android.gms.maps.model.BitmapDescriptor;
import com.google.android.gms.maps.model.BitmapDescriptorFactory;
import com.google.android.gms.maps.model.LatLng;
import com.google.android.gms.maps.model.Marker;
import com.google.android.gms.maps.model.MarkerOptions;
import com.google.firebase.auth.FirebaseAuth;
import com.google.firebase.database.DatabaseError;
import com.google.firebase.database.DatabaseReference;
import com.google.firebase.database.FirebaseDatabase;
public class Welcome extends FragmentActivity implements OnMapReadyCallback,
GoogleApiClient.ConnectionCallbacks,
GoogleApiClient.OnConnectionFailedListener,
LocationListener
{
private GoogleMap mMap;
private static final int MY_PERMISSION_REQUEST_CODE =7000;
private static final int PLAYY_SERVICE_ES_REQUEST = 7001;
private LocationRequest mLocationRequest;
private GoogleApiClient mGoogleApiClient;
private Location mLastLocation;
private static int UPDATE_INTERVAL = 5000;
private static int FASTEST_INTERVAL =3000;
private static int DISPLACEMENT = 10;
DatabaseReference drivers;
GeoFire geoFire;
Marker mCurrent;
MaterialAnimatedSwitch location_switch;
SupportMapFragment mapFragment;
FusedLocationProviderClient fusedLocationProviderClient;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_welcome);
// Obtain the SupportMapFragment and get notified when the map is ready to be used.
mapFragment = (SupportMapFragment) getSupportFragmentManager()
.findFragmentById(R.id.map);
mapFragment.getMapAsync(this);
location_switch = (MaterialAnimatedSwitch)findViewById(R.id.location_switch);
location_switch.setOnCheckedChangeListener(new MaterialAnimatedSwitch.OnCheckedChangeListener() {
@Override
public void onCheckedChanged(boolean isOnline) {
if(isOnline)
{
startLocationUpdates();
displayLocation();
Snackbar.make(mapFragment.getView(),"You are online",Snackbar.LENGTH_SHORT)
.show();
}
else
{
stopLocationUpdates();
mCurrent.remove();
Snackbar.make(mapFragment.getView(),"You are offline",Snackbar.LENGTH_SHORT)
.show();
}
}
});
//Geo Fire
drivers = FirebaseDatabase.getInstance().getReference("Drivers");
geoFire = new GeoFire(drivers);
setUpLocation();
}
@Override
public void onRequestPermissionsResult(int requestCode, @NonNull String[] permissions, @NonNull int[] grantResults) {
switch (requestCode)
{
case MY_PERMISSION_REQUEST_CODE:
if(grantResults.length>0 && grantResults[0]==PackageManager.PERMISSION_GRANTED)
{
if(checkPlayServices())
{
buildGoogleApiClient();
createLocationRequest();
if(location_switch.isChecked())
displayLocation();
}
}
}
}
private void setUpLocation() {
if(ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED )
{
ActivityCompat.requestPermissions(this, new String []{
Manifest.permission.ACCESS_COARSE_LOCATION,
Manifest.permission.ACCESS_FINE_LOCATION
},MY_PERMISSION_REQUEST_CODE);
}
else
{
if(checkPlayServices())
{
buildGoogleApiClient();
createLocationRequest();
//fusedLocationProviderClient = LocationServices.getFusedLocationProviderClient(this);
if(location_switch.isChecked())
displayLocation();
}
}
}
private void createLocationRequest() {
mLocationRequest = new LocationRequest();
mLocationRequest.setInterval(UPDATE_INTERVAL);
mLocationRequest.setFastestInterval(FASTEST_INTERVAL);
mLocationRequest.setPriority(LocationRequest.PRIORITY_HIGH_ACCURACY);
mLocationRequest.setSmallestDisplacement(DISPLACEMENT);
}
private void buildGoogleApiClient() {
mGoogleApiClient = new GoogleApiClient.Builder(this)
.addConnectionCallbacks(this)
.addOnConnectionFailedListener(this)
.addApi(LocationServices.API)
.build();
mGoogleApiClient.connect();
}
private boolean checkPlayServices() {
int resultCode = GooglePlayServicesUtil.isGooglePlayServicesAvailable(this);
if (resultCode != ConnectionResult.SUCCESS) {
if (GooglePlayServicesUtil.isUserRecoverableError(resultCode))
GooglePlayServicesUtil.getErrorDialog(resultCode, this, PLAYY_SERVICE_ES_REQUEST).show();
else
{
Toast.makeText(this, "This device is not supported", Toast.LENGTH_SHORT).show();
finish();
}
return false;
}
return true;
}
private void stopLocationUpdates() {
if(ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED )
{
return;
}
LocationServices.FusedLocationApi.removeLocationUpdates(mGoogleApiClient, (com.google.android.gms.location.LocationListener) this);
}
private void displayLocation() {
if(ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED )
{
return;
}
mLastLocation = LocationServices.FusedLocationApi.getLastLocation(mGoogleApiClient);
if(mLastLocation!=null)
{
if(location_switch.isChecked())
{
final double latitude = mLastLocation.getLatitude();
final double longitude = mLastLocation.getLongitude();
//Upgrade
geoFire.setLocation(FirebaseAuth.getInstance().getCurrentUser().getUid(), new GeoLocation(latitude, longitude), new GeoFire.CompletionListener() {
@Override
public void onComplete(String key, DatabaseError error) {
if(mCurrent!=null)
{
mCurrent.remove();
mCurrent=mMap.addMarker(new MarkerOptions()
.icon(BitmapDescriptorFactory.fromResource(R.drawable.car))
.position(new LatLng(latitude,longitude))
.title("You"));
//move camera to this position
mMap.animateCamera(CameraUpdateFactory.newLatLngZoom(new LatLng(latitude,longitude),15.0f));
//draw animation rotation marker
rotateMarker(mCurrent,-360,mMap);
}
}
});
}
}
else
{
Log.d("ERROR","Cannot get your location");
}
}
private void rotateMarker(final Marker mCurrent, final float i, GoogleMap mMap) {
final Handler handler=new Handler();
final long start = SystemClock.uptimeMillis();
final float startRotation = mCurrent.getRotation();
final long duration = 1500;
final Interpolator interpolator = new LinearInterpolator();
handler.post(new Runnable() {
@Override
public void run() {
long elapsed = SystemClock.uptimeMillis() - start;
float t = interpolator.getInterpolation((float)elapsed/duration);
float rot = t*i+(1-t)*startRotation;
mCurrent.setRotation(-rot > 180?rot/2:rot);
if(t<1.0)
{
handler.postDelayed(this,16);
}
}
});
}
private void startLocationUpdates() {
if(ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_COARSE_LOCATION)!= PackageManager.PERMISSION_GRANTED &&
ActivityCompat.checkSelfPermission(this, Manifest.permission.ACCESS_FINE_LOCATION)!= PackageManager.PERMISSION_GRANTED )
{
return;
}
LocationServices.FusedLocationApi.requestLocationUpdates(mGoogleApiClient,mLocationRequest, (com.google.android.gms.location.LocationListener) this);
// fusedLocationProviderClient.requestLocationUpdates(mGoogleApiClient,mLocationRequest,(com.google.android.gms.location.LocationListener)this);
}
@Override
public void onMapReady(GoogleMap googleMap) {
mMap = googleMap;
}
@Override
public void onLocationChanged(Location location) {
mLastLocation = location;
displayLocation();
}
@Override
public void onStatusChanged(String provider, int status, Bundle extras) {
}
@Override
public void onProviderEnabled(String provider) {
}
@Override
public void onProviderDisabled(String provider) {
}
@Override
public void onConnected(@Nullable Bundle bundle) {
displayLocation();
startLocationUpdates();
}
@Override
public void onConnectionSuspended(int i) {
mGoogleApiClient.connect();
}
@Override
public void onConnectionFailed(@NonNull ConnectionResult connectionResult) {
}
}
在这种情况下，如果您想在第一行的条件为true时跳过其余命令，那么
FOR /L %%G IN (0,1,31) DO (
rem Things that will done every time
IF NOT "%%G" == "6" (do something) else (
rem Things that will be done when %%G != 6
rem i.e. if %%G != 6 next
)
)
再次使用for循环不是必需的，因为每个循环只跳到一种情况。第一行似乎正在检查是否是播放器，因此只需将其拆分为单独的功能
FOR /L %%G IN (0,1,31) DO (
IF "%2" == "1" IF "%%G" == "%X%" (CALL :C 0C "i") ELSE (
IF "!M%MAP%%1:~%%G,1!" == "0" CALL :C 00 " "
IF "!M%MAP%%1:~%%G,1!" == "1" CALL :C 2A "w"
IF "!M%MAP%%1:~%%G,1!" == "2" CALL :C 87 "S"
IF ...
)
)
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