Help with dectecting a simple collision

Ok, I am trying to make a tron game, but it seems to be random wether it tells me i hit a wall. I have no idea what i am doing wrong, but I doubt ya'll want to see my juggernaught of code either, so is there any dependable way to call up a rgb value from a BufferedImage, because i am about to rip my computer apart over it.
Here is the rgb value checker and such, so you can just see that. I keeps telling me that white.darker has different values, so I stored it in a long so i can have something to compare to. the screen starts out as white.darker, and the wall the troncar leaves behind is red. WHY WON'T THIS WORK!
if(ofs2.getRGB(car.ypt()+ire[car.dir-1][0],car.xpt()+ire[car.dir-1][1])!=Color.white.darker().getRGB())
               if(bgrue==0)
                    bgrue=ofs2.getRGB(car.ypt()+ire[car.dir-1][0],car.xpt()+ire[car.dir-1][1]);
                    System.out.println("Set color to :"+bgrue);
               else
               if(bgrue!=ofs2.getRGB(car.ypt()+ire[car.dir-1][0],car.xpt()+ire[car.dir-1][1]))
               System.out.println("HIT A WALL!!!!\n"+bgrue+"\n"+Color.white.darker().getRGB()+"\n"+ofs2.getRGB(car.ypt()+ire[car.dir-1][0],car.xpt()+ire[car.dir-1][1]));
[\code]

What is this stuff: ire[car.dir-1][0]
Do your check something like this before you paint your car:
if (gameArea.getRGB(car.xpt(), car.ypt()) != backgroundColor.getRGB())
System.out.println("You hit something");
}

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Hi,
I’ve always received great help here and I’m sure that if I explain the issue I’m having properly I’ll get some good input.
This is to do with a very simple horizontal Spry menu, there’s no dropdown involved, only a color change on the rollover. The menu items are in a shade of blue, then on the rollover each menu item changes to a shade of red, the font color remains white for both.
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steve0308 wrote:
Hi,
I’ve always received great help here and I’m sure that if I explain the issue I’m having properly I’ll get some good input.
This is to do with a very simple horizontal Spry menu, there’s no dropdown involved, only a color change on the rollover. The menu items are in a shade of blue, then on the rollover each menu item changes to a shade of red, the font color remains white for both.
What’s mentioned above works flawlessly, the problem I’m having is this … On the rollover when the menu block items turn red, I’m attempting to add a 1px border around the entire block, but when I do the block item seems to want to change its width and height slightly when it’s rolled-over. As I said, without the border it works perfect.
Any suggestions will be appreciated.
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Hello All,
I am trying to learn how view transitions work and I am having a very hard time with the sample apps (like transition view app etc)...I need something much more simple at first. Can you please provide me a little guidelines on how to set up this following scenario:
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hi,
i managed to do this for my app. (think i referred to viewTransitions sample code and modified quite a bit)
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3) inside the controller files, you need to implement the toggleMenu function too, which basically calls the rootController's toggleMenu
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First of all, I don't
know how to append text to a textfield.
textField.setText( textField.getText() + TEXT_YOU_WANT_TO_APPEND );
Then,
when the user clicks one of the buttons, the compiler
goes crazy, and nothing is displayed.No, the compiler doesn't go crazy, the compiler has done it's job by then. However, you do get a NullPointerException, and the stacktrace tells you that the problem is on the following line:
txtDisplay.setText(strNames);
It turns out that strNames is null. I leave it to you to find out why. ;-)

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hi,
i managed to do this for my app. (think i referred to viewTransitions sample code and modified quite a bit)
i can't remember this well cos i did this quite a while back, but i will try to help as much as possible
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3) inside the controller files, you need to implement the toggleMenu function too, which basically calls the rootController's toggleMenu
4) we also need viewA and viewB files(view class)
5) need to add the .xib files for the respective views and link them up to the controller class. i did not use the .xib files for ui layout though, because of my app's needs. however, it will not work properly without the .xib files.
5) inside the view class of both views, i.e. viewA.m and viewB.m, you need to create a button, that will call the toggleMenu function inside the respective controller class.
it will look something like this:
[Button addTarget:ViewAController action:@selector(toggleMenu:) forControlEvents:UIControlEventTouchUpInside];
so the flow is really button (in view)-> toggleMenu(viewController) -> toggleMenu(rootController)
i'm sorry it sounds pretty hazy, i did this part weeks before and can't really remember. i hope it helps.

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Which of these objects must still exist after the statement completes execution?
4. For each of the classes HeatSim and HeatGrid, identify the client and supplier classes
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double
int
boolean
String
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array
and the clients for the HeatSim class are:
HeatGrid class
if anyone can help me i will but up the VERY short code to these two classes. I am really stuck and any help woould be greatly appriciated! :)
Lots o love
Sarah

ok here is the code (i don't have my compelted copy on me but this will do for the moment).....
import java.lang.Integer;
import java.lang.Double;
import java.text.DecimalFormat;
public class HeatSim {
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        double Thr = (args.length < 3)? DEFAULT_THR: Double.parseDouble(args[2]);
        String dumpFile = (args.length < 4)? "": args[3];
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        int n = heatGrid.gridWidth();
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            heatGrid.iterate();
            if (m <= MAX_MN_DISPLAY && n <= MAX_MN_DISPLAY) {
                System.out.println("Grid at time " + heatGrid.time() +
                                " has residual " +
                     residFormat.format(heatGrid.residual()));
                heatGrid.display(DISPLAY_WIDTH);
            if (ENABLE_VIEW) {
                 view.display(heatGrid.time(), heatGrid.residual(),
                              heatGrid.copyGrid());
        } //while(...)
        if (ENABLE_VIEW) {
            view.finalize();
        if (!dumpFile.equals("")) {
         heatGrid.dumpGrid(dumpFile);
        System.out.println("\nHeat Flow simulation of (" + m + "+2)x(" + n +
                           "+2) grid ends at time " + heatGrid.time() +
                           " with residual " +
                  residFormat.format(heatGrid.residual()));
    } //mainProgram()
} //HeatSim
import java.util.Scanner;
import java.io.*;
import java.text.DecimalFormat;
public class HeatGrid {
    private int m, n;
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    private int t;               // the time the grid has been evolved
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    // of name gridFileN; sets t to 0, and resid to Double.MAX_VALUE
    public HeatGrid(String gridFileN) {
    } //HeatGrid()
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        return 0;         // [ replace with an appropriate value ]
    } //gridHeight()
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    public int gridWidth() {
        return 0;         // [ replace with an appropriate value ] =
    } //gridWidth()
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        return 0;         // [ replace with an appropriate value ]
    } //time()
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        return 0;         // [ replace with an appropriate value ]
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        return null;         // [ replace with an appropriate value ]
    } //copyGrid
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    public void display(int width) {
    } //display()
    // advance the simulation a single timestep
    public void iterate() {
     } //iterate()
    // prints the m+2 x n+2 grid by rows, rows in ascending order.
    // All values are printed to 2 decimal places, with at least one space
    // between them.
    // Note: this method is intended for result checking by a computer program;
    // thus justification is not important.
    public void dumpGrid(String outGridFileN) {
    } //dumpGrid

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Alright...I feel like a complete idiot asking this question..but I'm having such trouble writing this program. The program description is here:
Write a Java application using two for loops to produce the following pattern of asterisks.
I guess I'm really bad at algorithms yeah? Haha...well, any help would be very much appreciated.

Hi,
I don't think you don't need to look through any C programming books.
When you have a problem like this, do some thinking about what methods you need to use and what the general structure of the program will be.
You need to print asterisks out to the screen... so you'll need:
System.out.println
System.out.printAnd you already know that you need two loops.
Now you can ask yourself how you might use the print statements with two loops in order to design a basic structure for the program.
You have 8 lines, so you might want a loop that runs through 8 times, one of the lines printed each time.
Within this loop, you need another loop that prints out *'s. This loop could run once for each asterisk, but because there is a different number of asterisks on each line, the number of times this loop runs would be variable.
So a basic structure:
//loop1 that runs 8 times
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Hi. I need a piece of advice on how to create the correct structure for my program. It consist on two main processes:
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http://forums.ni.com/t5/Digital-I-O/Measuring-Time-between-two-Digital-Signals/m-p/2091868#M16230
(If anyone knows a better way to do it I will really appreciate it)
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I attached a picture of the structure I am using. The numbers I will refer to, are indicated there.
The program basically starts counting the time until a rising edge is detected (number 2 in the picture). After that the next sequence is executed (number 3 in the picture) counting the time again until the next edge is detected. After that the subtraction is made to have the time difference and then displayed (number 4 in the picture).
Here is the problem: I have a continuous process that must be executed, so if I place it in "Number 1" then the edge detection must be running otherwise i do not see the continuous process (is like Labview execute de FLAT sequence, and after that the continuous process). If a place the continuous process in another While loop, then is like sometimes I get inaccurate data from the edge detection.
How can I solve that? Is there another way to acquire time between edges? I hope you can help me without the VI.
I am using Arduino, so I can not use DAQmx VI's.
DMDsync
Attachments:
program structure.jpg ‏54 KB

Thanks for the quick feedback!
I believe my problem is that I am not using the best way to estimate time between edges. As I previously said, I am using almost the exact VI that "Panoramarts" shared in this link:
http://forums.ni.com/t5/Digital-I-O/Measuring-Time-between-two-Digital-Signals/m-p/2091868#M16230
The only difference is that instead of a DAQ assistant in each of the While Loops, I use the same input for both of them. It works ok. It measure the time difference between the 1st and 2nd edges, the 3rd and 4th, and so on. All that VI is inside a while loop to continuously perform the counting. May be I can simplify my question:
How can I continuously measure time difference between incoming edges (it could be a Boolean variable varying from true to false periodically) in a VI that already has a continuous process running?
As Altenbach said, I used a wait statement in the continuous process (as it is not necessary a fast data update for it, because it is just a simple temperature measurement), but that delay created some faulty timing in the edge timing sequence.
Any ideas?
Thanks again!
DMDsync

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I am currently working on a designing problem I would appreciate if someone could review my solution.
The Problem:
I need to create a simple database that contains the following entries�
First Name //mandatory
Last Name //mandatory
Date of Birth //mandatory
Hobbies //there could be anywhere from 0 to infinite amount of hobbies
Type of actions that I need to perform on the database�
Add, delete, and modify and entry
Below are a two design solutions I came up with�
For both solutions I am going to create two text files. One of the text files called profiles.txt will contain the following fields on each line�
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Solution 2) Instead of loading the data at the start of the program the data will stay in the text files. So when someone does a search it will open the text file and search for the entry.
Problem with this solution is it would be hard to delete and modify names (would I have to rewrite the text file every time I do a change?). Would a good fix to this problem be creating a separate text file to keep track of any changes or deletions I do and once in a while do a database maintenance?
So a review of my questions is�
1)     Would my program crash if I had 200 million entries if I use my solution 1?
2)     Is my solution 2 possible without being incredibly slow or complicated?
3)     Is there another way of doing this I have not thought of?

I think having one option will do. Now the problem with this text file thing is that, we'll hve to read every information into memory if we are running a test driver for the program and then work on the information in memory.
After the program closes, whatever changes we made to this data in memory shd be written to file so we need to find a way of writing the data from memory to overwrite the file. I hope you kinda get what i'm talking abt.
the database will consist of information like this
String firstName
String lastName
String DOB
ArrayList / Vector Hobbies
Now, we kinda want to declare a class with with all these information as data fields ok.
so let's say
public class Try{
String firstName
String lastName
String DOB
ArrayList / Vector Hobbies
and then create an instance of this class in the driver
which will be an ArrayList of this class or something so each index of this class ArrayList will hve it's unique data information from the file we read in but again, this is kinda working in memory right.
After doing all we have to do, we want to write back to file all the changes we made to the data in memory. That's where we are kinda stuck right now.
A member of the group was suggesting we call whatever functions to work on the txt file which will mean we'll hve to re-write each time we call a function to operate on it and all that stuff. This is a slow process.
will be glad if anybody out there will have a better way to implement this. Thanks a lot.

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etc
What I'm trying to write is a statement that will return the 'PART_OF' as the 'NAME' rather than the ID number if the ID = 101.
I was wondering if a nested select statement would do (select as select etc) but just can't get my head round it!
Any ideas?
TIA. Jake.

Hi Jake,
It's not clear what you are looking for. If USER A is just Part of GROUP A, a self-join will do:
SQL> with loc as (select 101 locid, 'USER A' locname, 123 part_of from dual
             union all
             select 123 locid, 'GROUP A' locname, 124 part_of from dual
             union all
             select 124 locid, 'REGION A' locname, null part_of from dual)
-- End of test data
select l1.locid, l1.locname, l2.locname part_of
from loc l1, loc l2
where l2.locid(+) = l1.part_of
     LOCID LOCNAME PART_OF
       101 USER A   GROUP A
       123 GROUP A REGION A
       124 REGION A
3 rows selected.But if you want USER A to be part of REGION A, then you need a hierarchia lquery:
SQL> with loc as (select 101 locid, 'USER A' locname, 123 part_of from dual
             union all
             select 123 locid, 'GROUP A' locname, 124 part_of from dual
             union all
             select 124 locid, 'REGION A' locname, null part_of from dual)
-- End of test data
select l1.locid, l1.locname, connect_by_root(locname) part_of
from loc l1
start with part_of is null
connect by prior locid = part_of
     LOCID LOCNAME PART_OF
       124 REGION A REGION A
       123 GROUP A REGION A
       101 USER A   REGION A
3 rows selected.Regards
Peter

Help with a VERY simple Automator script

i spent a few minuted trying to figure this out, but concluded it might be easier to simply ask in the forum how to do this.
I want to
1) open a terminal window
2) execute the following commands:
cd /Users/lenny/ventrilo/
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thats it...
please help using very small works
ideally i would like this to be execute when i start up my computer. (i.e. a login script)

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end tell</pre>
PowerMac G5 (June 2004) 2x1.8GHz 1.25GB, PowerBook G4 (12-inch DVI) 1x1GHz 768MB Mac OS X (10.4.3)

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