What do you need help with? Version 1

[ShaunOfTheLive]

[QUOTE=Matthew0505;25738745]This'll seem like a strange question, but what's the fastest way to divide unsigned 8-bit numbers? Assuming that add/subtract, multiply, shifts and inequality (<, >, != etc) are already defined.[/QUOTE]

Integer or floating-point division?

[ShaunOfTheLive]

This looks like a pretty good algorithm, but I'm not sure:
[url]http://www.convict.lu/Jeunes/Math/Fast_operations2.htm[/url]

[Vbitz]

I am at a loss of what to make this weekend, I have already made a basic web-server and synced command running app.

[Siemens]

[QUOTE=Matthew0505;25738745]This'll seem like a strange question, but what's the fastest way to divide unsigned 8-bit numbers? Assuming that add/subtract, multiply, shifts and inequality (<, >, != etc) are already defined.[/QUOTE]

If the divisor (D) is a power of two, the fastest way is N >> log(2, D)

[Siemens]

[QUOTE=Matthew0505;25739147]Does that example apply to any division of integers, or just those 2 numbers?[/QUOTE]

are you serious

[ShaunOfTheLive]

[QUOTE=Matthew0505;25740149]
There seems to be some kind of iteration in the example, but it doesn't specify the conditions
[/QUOTE]

The conditions are specified. It's a simple algorithm, although there are some mistakes and confusing grammar.

rotate divisor and base_index until the most significant bit of numerator equals the most significant bit of divisor
A:
subtract divisor from numerator
--if difference is negative, rotate divisor and base_index one digit to the right
--if difference is positive, goto B
goto A
B:
let numerator = difference
C:
add base_index to result
rotate divisor and base_index one digit to the right
subtract divisor from numerator
--if difference is negative, END
--if difference is positive, goto C

[Liquid Helium]

Ignore this, I am late do to thinking an old page was the current one

[ZeekyHBomb]

I believe the question is about doing integer division without a division operator available only only the named operators - also only available for integer arithmetics.
Besides, the multiplying by the inverse still requires the division operator (x * (1 / y)).

[wolfalt]

I'm looking for a way to have a console window be created along with my usual DirectX Screen, to be used as a debug console. Any ideas?

[editline]1st November 2010[/editline]

In C++

[editline]1st November 2010[/editline]

In C++

[BlkDucky]

[QUOTE=wolfalt;25790225]I'm looking for a way to have a console window be created along with my usual DirectX Screen, to be used as a debug console. Any ideas?

[editline]1st November 2010[/editline]

In C++

[editline]1st November 2010[/editline]

In C++[/QUOTE]

I'm pretty sure one will be created if you try to std::cout something?

[editline]1st November 2010[/editline]

Okay. So I have a Game class:

#ifndef _CGAME_H_INC
#define _CGAME_H_INC
#include "globals.h"
#include "cCharacter.h"
#include "cRoom.h"

class cEmote;

class cGame
{
public:
	int init();
	int run();
	int halt();

// OTHER IRRELEVANT STUFF HERE

	std::vector<cRoom> rooms;
	std::vector<cEmote> emotes;

	cCharacter *pCurrent_Character;

private:

protected:

};

#endif //_CGAME_H_INC

And in run() I try to do this:

testzone.set_Name("Lair of the Debugger");
testzone.set_Desc("All you'd ever need to find and kill bugs is in this room.");
testzone.add_Item(flyswat);
testzone.add_Item(mosquitonet);
testzone.add_Item(bugspray);
testzone.add_NPC(character);
testzone.add_NPC(debugger);
testzone.add_NPC(magictable);

try
{
     rooms.push_back(testzone);
}
	
catch (std::length_error& le) 
{
     std::cerr << "Length error: " << le.what() << std::endl;
     std::stringstream temp;
     temp << "rooms.size() = " << rooms.size() << std::endl << "rooms.max_size() = " <<  rooms.max_size() << "rooms.capacity() = " << rooms.capacity();
     mainLog.log(temp.str());
}

That catch block is called every time and mainLog.log gives this:

rooms.size() = 4294949122
rooms.max_size() = 17318416 rooms.capacity() = 4294949122

...Yeah. This causes it to crash as soon as it tries to access rooms[0].

But if I try to push_back an emote to the emotes vector, that works fine.

Halp? :v:

Edit:

cRoom.h is this, by the way:

#ifndef _CROOM_H_INC
#define _CROOM_H_INC
#include "globals.h"
#include "cItem.h"
#include "cCharacter.h"

class cCharacter;

class cRoom : public cEntity
{
public:
	cRoom();
	std::string tele_password;

	std::vector<cItem> items;
	std::vector<cCharacter> npcs;

	void add_Item(cItem toAdd);
	void add_NPC(cCharacter toAdd);

	bool echo;
	bool dark;

private:

protected:

};

#endif //_CROOM_H_INC

Edit 2: It's probably important to note that this only happens in release builds. Debug builds run this code perfectly. :psyduck:

[Chandler]

This might help: [url]http://msdn.microsoft.com/en-us/library/fsk896zz.aspx[/url]

If you're using GCC, just add "-g -O2" to your compiler and linker flags :)

[ZeekyHBomb]

[QUOTE=wolfalt;25790225]I'm looking for a way to have a console window be created along with my usual DirectX Screen, to be used as a debug console. Any ideas?

[editline]1st November 2010[/editline]

In C++

[editline]1st November 2010[/editline]

In C++[/QUOTE]

[url=http://msdn.microsoft.com/en-us/library/ms681944(VS.85).aspx]AllocConsole[/url]

[Overv]

Or make a console project and create a window.

[Liquid Helium]

Hey, stupid c++ newbie question incoming, I am just starting to learn c++, I don't quite understand how to set up classes with header files and the like, say I have 3 files, the main program, the header file for a class and the cpp file with the class methods defined.

for example:

main.cpp

#include <iostream>

int main()
{
	//stuff
}

foo.h

class Foo
{
public:
	Foo(void);
	~Foo(void);

	void DoStuff(void);
};

Foo.cpp

Foo::Foo(void)
{
//stuff
}

Foo::~Foo(void)
{
//stuff
}

void Foo::DoStff(void) 
{
//stuff
}

were do the #include "foo.h" and "foo.cpp" go in each of these files so that I can use the foo class in the main.cpp?

[Overv]

You have to include foo.h in Foo.cpp and main.cpp, that's all. You never include a .cpp file.

[Liquid Helium]

[QUOTE=Overv;25805250]You have to include foo.h in Foo.cpp and main.cpp, that's all. You never include a .cpp file.[/QUOTE]

Ah, that's were I was going wrong, cheers.

[ShaunOfTheLive]

[QUOTE=Liquid Helium;25805276]Ah, that's were I was going wrong, cheers.[/QUOTE]

If you want more info as to why, it's because every .cpp file is its own "translation unit", which means they are all compiled separately and then linked together.

[wolfalt]

[QUOTE=ZeekyHBomb;25791867][url=http://msdn.microsoft.com/en-us/library/ms681944(VS.85).aspx]AllocConsole[/url][/QUOTE]

Thanks.

[teeheeV2]

In actionscript 3, how would I go about making it that when I click a picture, it gets bigger and centered on the screen, and when i click it again, it goes back to normal

[backwardspy]

Ok, so let's say I have a simple tile-based map going on, stored in a 2D array.

Drawing it would be something like

For each tile in X dimension of map
    For each tile in Y dimension of map
        Draw square at X * TileSize, Y * TileSize, taking the graphics from Map[X, Y]

Now say I add a camera system like so:

Declare CamX and CamY

For each tile in X dimension of map
    For each tile in Y dimension of map
        Draw square at X * TileSize, Y * TileSize, taking the graphics from Map[X + CamX, Y CamY]

Of course, that results in scrolling by one whole tile per increment/decrement of CamX and CamY.

How best would I go about implementing smooth scrolling?

[Jimmylaw]

I have a feeling this is a really dumb question but I'm going to ask it anyway.

I have this code,

	
D3DXMATRIX Scale, Rotation, Matrix, Position;

D3DXMatrixRotationY(&Rotation, 0);
D3DXMatrixRotationX(&Rotation, 0);
D3DXMatrixRotationZ(&Rotation, 0);

D3DXMatrixScaling( &Scale, 1.0f, 1.0f, 1.0f );

Matrix = Scale *
	 Rotation;

d3ddev->SetTransform(D3DTS_WORLD, &(Matrix));    // set the world transform

I'm confused as to how I apply these matrices to one single model or object. At the moment they just appear to effect everything on the screen.

[yngndrw]

You set the world matrix, then render a model with that. Then for the next model you set a different world matrix before rendering that.

[Jimmylaw]

[QUOTE=yngndrw;25834250]You set the world matrix, then render a model with that. Then for the next model you set a different world matrix before rendering that.[/QUOTE]

I shall give it a try now, thanks very much.

[Alice]

I'm not sure if this is where I should post this but a few of us hosting Minecraft servers need help with a batch file to increase the available memory for Java.

According to the Minecraft forums, the following command should increase the range of available memory to a minimum of 1GB available with a max of 4GB available.

java -Xms1024M -Xmx4096M -jar minecraft_server.jar

When we run a batch file with that command though, we get an error like this:
[IMG]http://img837.imageshack.us/img837/6607/minecraftserverbatch.png[/IMG]

Does anyone know what we need to differently? Any help would be extremely appreciated.

[Veid]

[QUOTE=Onyx3173;25835505]I'm not sure if this is where I should post this but a few of us hosting Minecraft servers need help with a batch file to increase the available memory for Java.

According to the Minecraft forums, the following command should increase the range of available memory to a minimum of 1GB available with a max of 4GB available.

java -Xms1024M -Xmx4096M -jar minecraft_server.jar

When we run a batch file with that command though, we get an error like this:
[img_thumb]http://img837.imageshack.us/img837/6607/minecraftserverbatch.png[/img_thumb]

Does anyone know what we need to differently? Any help would be extremely appreciated.[/QUOTE]

Looks like you haven't installed the Java SDK.
[url]http://www.oracle.com/technetwork/java/index.html[/url]

[Alice]

[QUOTE=Veid;25835775]Looks like you haven't installed the Java SDK.
[URL]http://www.oracle.com/technetwork/java/index.html[/URL][/QUOTE]
So after installing the SDK, the batch file should work fine then?

[editline]a[/editline]

That seems to have worked just fine actually. Thank you from all of us Minecraft server hosters!

[Richy13]

[QUOTE=Chris220;25833455]Ok, so let's say I have a simple tile-based map going on, stored in a 2D array.

Drawing it would be something like

For each tile in X dimension of map
    For each tile in Y dimension of map
        Draw square at X * TileSize, Y * TileSize, taking the graphics from Map[X, Y]

Now say I add a camera system like so:

Declare CamX and CamY

For each tile in X dimension of map
    For each tile in Y dimension of map
        Draw square at X * TileSize, Y * TileSize, taking the graphics from Map[X + CamX, Y CamY]

Of course, that results in scrolling by one whole tile per increment/decrement of CamX and CamY.

How best would I go about implementing smooth scrolling?[/QUOTE]

I also am interested in this.

[Sharpshooter]

Hey guys, I am working on my Computing project for my A-Level. It is basically a program made in VB.net which gives a slideshow on recursion and then goes on to a multiple choice quiz of which the users result is stored in a database alongside there account details.

I have been having a nightmare trying to get a fading animation on the panel which holds the slide so I can have cool transitions between slides, but I just can't seem to figure out a way to do it and really my programming knowledge is limited to VB.net.

Here is the current sub-procedure code I have for the 'wiping' slide animation I have at the moment.

        If HeightReached = False Then
            TutorialPanel.Height = TutorialPanel.Height - 8
            If TutorialPanel.Height = 0 Then
                HeightReached = True
            End If
        End If

        If HeightReached = True Then
            If TutorialPanel.Height >= 488 Then
                SlideWiper.Dispose()
                TutorialPanel.Height = TutorialPanel.Height + 4
            Else
                TutorialPanel.Height = TutorialPanel.Height + 8
                If SlideCheckerValidated = False Then
                    Call SlideChecker()
                    SlideCheckerValidated = True
                End If
            End If
        End If
        Label1.Text = TutorialPanel.Height

As you can see it basically just reduces and increase the height of TutorialPanel to give a wiping effect, this is sub is triggered on the ticking of my timer, I really want a fade in and out transition however, any idea how I would go about doing this? I have tried overlaying a form and using opacity property already however it produced really glitchy and generally ugly results so that is pretty much out of the question.

[Veid]

[QUOTE=Onyx3173;25835914]So after installing the SDK, the batch file should work fine then?

[editline]a[/editline]

That seems to have worked just fine actually. Thank you from all of us Minecraft server hosters![/QUOTE]

You'll need to install the SDK and then you'll probably have to set up the PATH variable if you want the command to run globally.
You can go here: [url]http://www.apl.jhu.edu/~hall/java/beginner/settingup.html[/url] and check out the portion on setting your PATH.

Edit:
Didn't notice your edit, no problem.

[ZeekyHBomb]

[QUOTE=Chris220;25833455]Ok, so let's say I have a simple tile-based map going on, stored in a 2D array.

Drawing it would be something like

For each tile in X dimension of map
    For each tile in Y dimension of map
        Draw square at X * TileSize, Y * TileSize, taking the graphics from Map[X, Y]

Now say I add a camera system like so:

Declare CamX and CamY

For each tile in X dimension of map
    For each tile in Y dimension of map
        Draw square at X * TileSize, Y * TileSize, taking the graphics from Map[X + CamX, Y CamY]

Of course, that results in scrolling by one whole tile per increment/decrement of CamX and CamY.

How best would I go about implementing smooth scrolling?[/QUOTE]

If CamX > OldCamX
    OldCamX += StepSize
Else If CamX < OldCamX
    OldCamX -= StepSize
Else
    OldCamX = CamX
(same with Y)
...
        Draw square at x * TileSize + (CamX - OldCamX), Y * TileSize + (CamY - OldCamY), taking the graphics from Map[X + CamX, Y + CamY]

Something like this I think.

[QUOTE=Veid;25835775]Looks like you haven't installed the Java SDK.
[url]http://www.oracle.com/technetwork/java/index.html[/url][/QUOTE]

Shouldn't installing the Java Runtime Environment not be enough?