I am working on a shooting game on iPhone and I need lua for scripting levels, enemies, and etc.
So I wrote a bullet script like this:
-- circular_bullet.lua
local time_between_bullets = 0.2;
...
function InitializeCircularBullet(objectName)
...
end
and an enemy script:
-- level1_D2.lua
require("circular_bullet.lua");
...
But it turned out that the enemy script can't "require" the bullet script.
I tried to look into lua library, and found out that in loadlib.c :
static int ll_require (lua_State *L) {
...
if (lua_isfunction(L, -1)) /* did it find module? */
break; /* module loaded sucessfully */
else if (lua_isstring(L, -1)) /* loader returned error message? */
lua_concat(L, 2); /* accumulate it */
else
lua_pop(L, 1);
...
}
It would enter the "else if" branch, which means some error happened, but I have no idea how to read that error message.
If I comment out the "require" line, the enemy "level1_D2" would work as intend without shooting bullet. I also did try copy the whole circular_bullet.lua into level1_D2.lua, and it worked, so the problem must be the require statement.
Those two files are under root directory of the package. (I don't know how to make them in different directory, thus I had found out that Diner Dash kept its scripts in different directory.)
However the two files are not in the same group in my Xcode project. I tried putting them in same group but nothing happened.
Anyone knows what the problem is? Thanks a lot!
Finally I got the answer!!!
the lua require function searches "./scrips" directory for require files, so I got to put those script in the directory!
Yet I still don't know how to change that searching path, but it did work.
I've got a snippet here which might help you to change that path:
// Initialize library path
lua_pushstring(L,"package");
lua_gettable(L, LUA_GLOBALSINDEX);
string path = string(Globals::GetPathPrefix())+"?.lua";
lua_pushstring(L, "path");
lua_pushstring(L, path.c_str());
lua_settable(L, -3);
lua_pop(L,1);
I also had this when I was new to Lua. I don't know this also appears on iPhone, but on Windows I had to remove the '.lua' So just remove the extension.
Related
so I'm new to Unity and I've been trying to test the scene with the script attatched to a character. However, it keeps saying "The associated script cannot be loaded. Please fix any compile errors and assign a valid script." It also says that the name of the file could be different from the name in the code but it isnt, and also it says that the code could be missing MonoBehaviour Scripts. It wont even allow me to attach the script to characters because it cant find the script class.
I've copied and downloaded character movement codes from the internet but they didnt work either. I've also tried deleting and re-making the CS files but that didnt work either. Even adding empty scripts to characters didnt work unless i do it from "Add component"
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
public class Movement : MonoBehaviour
{
SpriteRenderer sprite;
Rigidbody2D rigid;
// Start is called before the first frame update
void Start()
{
sprite = GetComponent<SpriteRenderer>();
rigid = GetComponent<Rigidbody2D>();
}
private void FixedUpdate()
{
if (Input.GetKey("d"))
rigid.velocity = new Vector2(2, 0);
else if (Input.GetKey("a"))
rigid.velocity = new Vector2(-2, 0);
}
}
There are also these errors in Unity if that helps
I think your class name is different from file name.
Unity apparently can't handle apostrophes (single-quote ') in the directory name of the editor. You need to get rid of the apostrophe in your directory name. Once you make that change, Unity should be able to build the scripts as intended.
Edit: This has been fixed in more recent versions - see https://issuetracker.unity3d.com/issues/scripts-do-not-get-compiled-if-the-unity-editor-path-contains-apostrophes for reference
First, it is recommended to use "Add component" to create a script, if you want to attach it to a GameObject, as it automatically imports necessary libraries. Implementing MonoBehaviour is necessary for adding a script to a GameObject.
Second, FixedUpdate() should not be set to private, it does not need an access modifier, just like Start(), see https://docs.unity3d.com/ScriptReference/MonoBehaviour.FixedUpdate.html.
Third, the errors in your first screenshot seem to imply that there is a problem with your Unity installation. Try reinstalling it and make sure that the Editor you install matches your operating system (64 or 32 bit?).
Fourth, the second screenshot is shown when you use any obsolete libraries or classes, which does not seem to be the case in the script you shared.
Hope that helps.
It's basically because you deleted some script or renamed it or degraded unity version. you might have to reassign the script at the required position/component.
Note: Make sure that class name is the same as the script name in unity.
i'm using this on push button click in Qt:
QString fileName = QFileDialog::getSaveFileName(this, tr("Save file"),
QString(),
tr("(*.csv));
it take 3-4 second to open the save Form. why? how i can improve speed?
Try to connect this slot to a QPushButton:
void MainWindow::openFD(){
QTime myopentime=QTime::currentTime();
for (int i=0;i<1000000;i++) ;//comment out this line for the real test
QString fileName = QFileDialog::getSaveFileName(this,QString(),QString(myopentime.toString("m.s.zzz")+" "+QTime::currentTime().toString("m.s.zzz"))
,tr("*.csv") );
}
Then try to run it with and without the count part.
You will see, that the count part adds some ms... without it there is not even ms (mili-second) of difference in the time shown in filename place.
So, you have to search somewhere else in your code or give us a better example.
PS:
1) You will need :
#include <QTime>
2) The line that counting is there to show you that my method works (since you will see some difference when uncomment)
Result and Answer: The problem is not on QFileDialog if this test will not give you differences but somewhere else in your code or possibly in the Window manager of your OS.
I have a pyclips / clips program for which I wrote some unit tests using pytest.
Each test case involes an initial clips.Clear() followed by the execution of real clips COOL code via clips.Load(rule_file.clp). Running each test individually works fine.
Yet, when telling pytest to run all tests, some fail with ClipsError: S03: environment could not be cleared. In fact, it depends on the order of the tests in the .py file. There seem to be test cases, that cause the subsequent test case to throw the exception.
Maybe some clips code is still "in use" so that the clearing fails?
I read here that (clear)
Clears CLIPS. Removes all constructs and all associated data structures (such as facts and instances) from the CLIPS environment. A clear may be performed safely at any time, however, certain constructs will not allow themselves to be deleted while they are in use.
Could this be the case here? What is causing the (clear) command to fail?
EDIT:
I was able to narrow down the problem. It occurs under the following circumstances:
test_case_A comes right before test_case_B.
In test_case_A there is a test such as
(test (eq (type ?f_bio_puts) clips_FUNCTION))
but f_bio_puts has been set to
(slot f_bio_puts (default [nil]))
So testing the type of a slot variable, which has been set to [nil] initially, seems to cause the (clear) command to fail. Any ideas?
EDIT 2
I think I know what is causing the problem. It is the test line. I adapted my code to make it run in the clips Dialog Windows. And I got this error when loading via (batch ...)
[INSFUN2] No such instance nil in function type.
[DRIVE1] This error occurred in the join network
Problem resided in associated join
Of pattern #1 in rule part_1
I guess it is a bug of pyclips that this is masked.
Change the EnvClear function in the CLIPS source code construct.c file adding the following lines of code to reset the error flags:
globle void EnvClear(
void *theEnv)
{
struct callFunctionItem *theFunction;
/*==============================*/
/* Clear error flags if issued */
/* from an embedded controller. */
/*==============================*/
if ((EvaluationData(theEnv)->CurrentEvaluationDepth == 0) &&
(! CommandLineData(theEnv)->EvaluatingTopLevelCommand) &&
(EvaluationData(theEnv)->CurrentExpression == NULL))
{
SetEvaluationError(theEnv,FALSE);
SetHaltExecution(theEnv,FALSE);
}
Is there a way to assign multiple assets to multiple variables on the inspector???
My case is this, I have 5 objects, those objects have a script wich have around 1200 variables used to play SFXs. When Unity compile the script I have to manually drag and drop the SFX from the assets to the variable on the inspector, or go to the inspector, scrol to the variable, click the dot and then select the SFX file from the window.
Is there a way to speed this up?
You should create a public List of Audio Sources which will appear in inspector. Lock the inspector by clicking look in right top.
Now select all the files from Project and drag on list. All files will be added to list. Now if you want a specific file you can find the file by its name for example:
AudioSource GetAudioSource(string SourceName)
{
return audioSourceList.Find(item => item.Name == SourceName);
}
Use the Resources.LoadAll method to access all the assets from the path parameter via scripting. Probably put that method call in Start. Might have to rename the files to pull the right order from the LoadAll method if they result in some alternate order.
EDIT: Here's some example code...
(NOTE: Loads from Resources/Sound/SFX folder)
For reference: http://docs.unity3d.com/ScriptReference/Resources.LoadAll.html
public class YourClassNameGoesHere : MonoBehaviour
{
Public AudioClip[] BA;
void Start ()
{
BA = (AudioClip[]) Resources.LoadAll("Sound/SFX");
}
}
I found a solution for this problem. I must say, it's not perfect, in fact, it should not be used unless is absolutely necessary.
To speed up the assign you could do this:
Create a variable
public AudioClip ma, me, mi, mo, mu;
At Start() add
ma = Resources.Load("Sound/SFX/MA") as AudioClip;
me = Resources.Load("Sound/SFX/ME") as AudioClip;
mi = Resources.Load("Sound/SFX/MI") as AudioClip;
mo = Resources.Load("Sound/SFX/MO") as AudioClip;
mu = Resources.Load("Sound/SFX/MU") as AudioClip;
After compile the public variables will be available on the Inspector as empty variables, but, on runtime the variables will be filled with the content of the folder Resources/Sound/SFX (Assets\Resources\Sound\SFX).
Why shouldn't be use unless necessary?, first, it's a bad practice; second, it's a cheap trick that comes at a price (on mobile devices it load all the resources so will consume RAM fast). In my test, all my sound clips take as much as 169 MB. On PC it's not much of a problem, but if your target is Mobile games, this is something to take into consideration. And third, on web player, ALL resources will be streamed first.
On a side note, this cheap trick ignores the way Unity handles assets. Unity force you to assign assets manually because if the asset is not use, it will not be integrated into the build. This trick force everything to be loaded and be integrated into the final build, used or no. On the other hand, if you are assign it, you will use it... right?
The answer and example given by #Jayson Ash lead me to the right direction.
How would I validate that a jpg file is a valid image file. We are having files written to a directory using FTP, but we seem to be picking up the file before it has finished writing it, creating invalid images. I need to be able to identify when it is no longer being written to. Any ideas?
Easiest way might just be to write the file to a temporary directory and then move it to the real directory after the write is finished.
Or you could check here.
JPEG::Error
[arguments: none] If the file reference remains undefined after a call to new, the file is to be considered not parseable by this module, and one should issue some error message and go to another file. An error message explaining the reason of the failure can be retrieved with the Error method:
EDIT:
Image::TestJPG might be even better.
You're solving the wrong problem, I think.
What you should be doing is figuring out how to tell when whatever FTPd you're using is done writing the file - that way when you come to have the same problem for (say) GIFs, DOCs or MPEGs, you don't have to fix it again.
Precisely how you do that depends rather crucially on what FTPd on what OS you're running. Some do, I believe, have hooks you can set to trigger when an upload's done.
If you can run your own FTPd, Net::FTPServer or POE::Component::Server::FTP are customizable to do the right thing.
In the absence of that:
1) try tailing the logs with a Perl script that looks for 'upload complete' messages
2) use something like lsof or fuser to check whether anything is locking a file before you try and copy it.
Again looking at the FTP issue rather than the JPG issue.
I check the timestamp on the file to make sure it hasn't been modified in the last X (5) mins - that way I can be reasonably sure they've finished uploading
# time in seconds that the file was last modified
my $last_modified = (stat("$path/$file"))[9];
# get the time in secs since epoch (ie 1970)
my $epoch_time = time();
# ensure file's not been modified during the last 5 mins, ie still uploading
unless ( $last_modified >= ($epoch_time - 300)) {
# move / edit or what ever
}
I had something similar come up once, more or less what I did was:
var oldImageSize = 0;
var currentImageSize;
while((currentImageSize = checkImageSize(imageFile)) != oldImageSize){
oldImageSize = currentImageSize;
sleep 10;
}
processImage(imageFile);
Have the FTP process set the readonly flag, then only work with files that have the readonly flag set.