[Staneh]

Post all the non-thread-worthy questions in this thread.

V1
V2
V3
V4

Let's ask some questions!

[miceiken]

Why does this say version 4? http://www.facepunch.com/threads/1152030

[Nigey Nige]

I need help finding WAYWO :(

[Staneh]

miceiken posted:

Why does this say version 4? http://www.facepunch.com/threads/1152030

wow FUCK

Edited:

Nigey Nige posted:

I need help finding WAYWO :(

Waywo should be made really soon by Overv.

[Icedshot]

Does anyone have any good resources/an opinion on CUDA vs DirectCompute vs OpenCL? I'm entirely lost as to where to begin/which one to pick

Edit:

Decided to go with OpenCL, due to working on several hardware brands not just nvidia, and also because it isn't reliant on directx, which i am trying to avoid

[vexx21322]

I ran into something that I can't quite understand, using regular expressions in javascript.
I know this sounds like it should go in web development, but this isn't going towards the development of a webpage. (userscript)



I want it to match both 1.1 and 1.1.+ but also have the brackets be a lazy match.

Does anyone know the correct regular expression for this?

[Swebonny]

Likes this?

\[1\.1(.1)*\]

Edited:

Basically checks if the value that comes after "[1.1" is (.1) and then check if it appears zero or more times then add bracket.

[Superbird]

Repost from last thread.

Been messing around with GWEN as of lately but I can't seem to work this out.

TestApp.cpp

#include "TestApp.h"


GWEN_CONTROL_CONSTRUCTOR( TestApp )
{
	Dock( Pos::Fill );

	CreateButton();

}


void TestApp::CreateButton()
{
	Controls::Button* pButtonA = new Controls::Button( this );
	pButtonA->SetText( L"Start" );
	pButtonA->onPress.Add( this, &TestApp::onButtonA );
	pButtonA->SetPos(75, 175);
}


void TestApp::onButtonA()
{
	pButtonA->SetText("lol");	
}

TestApp.h

#pragma once

#include "Gwen/Gwen.h"
#include "Gwen/Controls.h"
#include "Gwen/Controls/Layout/Position.h"
#include "Gwen/Controls/WindowControl.h"

using namespace Gwen;

/*

	The base panel

*/

class TestApp : public Controls::Base 
{
	GWEN_CONTROL( TestApp, Controls::Base );

public:
		void onButtonA();
		void CreateButton();

};

You can see in onButtonA() I am trying to set the text of pButtonA from CreateButton(), although I am getting "identifier pButtonA is undefned"

[mechanarchy]

Superbird posted:

Repost from last thread.

Been messing around with GWEN as of lately but I can't seem to work this out.

void TestApp::CreateButton()
{
	Controls::Button* pButtonA = new Controls::Button( this );
	pButtonA->SetText( L"Start" );
	pButtonA->onPress.Add( this, &TestApp::onButtonA );
	pButtonA->SetPos(75, 175);
	
	//
	// pButtonA goes out of scope here and is no longer defined
	//
}

so

class TestApp : public Controls::Base 
{
	GWEN_CONTROL( TestApp, Controls::Base );

public:
		void onButtonA();
		void CreateButton();
		
	//
	// Add this here
	//
private:
	Controls::Button* pButtonA;

};

then

void TestApp::CreateButton()
{
	// change
	// Controls::Button* pButtonA = new Controls::Button( this );
	// to
	pButtonA = new Controls::Button(this);
	
	// ...
}

[Superbird]

Thanks!

[Richy19]

Anyone know why Im getting this with linux when I try to run a SFML app?

./SFMLTest: error while loading shared libraries: libsfml-graphics.so.2: cannot open shared object file: No such file or directory

I have all the libraries:

richy@richy-Len:/usr/local/lib$ dir
Box2D			    libcsfml-system.so	       libsfml-graphics.so.2
libBox2D.a		    libcsfml-system.so.2       libsfml-graphics.so.2.0
libBox2D.so		    libcsfml-system.so.2.0     libsfml-network-d.so
libBox2D.so.2.1.0	    libcsfml-window-d.so       libsfml-network-d.so.2
libcsfml-audio-d.so	    libcsfml-window-d.so.2     libsfml-network-d.so.2.0
libcsfml-audio-d.so.2	    libcsfml-window-d.so.2.0   libsfml-network-s.a
libcsfml-audio-d.so.2.0     libcsfml-window.so	       libsfml-network.so
libcsfml-audio.so	    libcsfml-window.so.2       libsfml-network.so.2
libcsfml-audio.so.2	    libcsfml-window.so.2.0     libsfml-network.so.2.0
libcsfml-audio.so.2.0	    libsfgui-d.so	       libsfml-system-d.so
libcsfml-graphics-d.so	    libsfgui-s.a	       libsfml-system-d.so.2
libcsfml-graphics-d.so.2    libsfgui-s-d.a	       libsfml-system-d.so.2.0
libcsfml-graphics-d.so.2.0  libsfgui.so		       libsfml-system-s.a
libcsfml-graphics.so	    libsfml-audio-d.so	       libsfml-system.so
libcsfml-graphics.so.2	    libsfml-audio-d.so.2       libsfml-system.so.2
libcsfml-graphics.so.2.0    libsfml-audio-d.so.2.0     libsfml-system.so.2.0
libcsfml-network-d.so	    libsfml-audio-s.a	       libsfml-window-d.so
libcsfml-network-d.so.2     libsfml-audio.so	       libsfml-window-d.so.2
libcsfml-network-d.so.2.0   libsfml-audio.so.2	       libsfml-window-d.so.2.0
libcsfml-network.so	    libsfml-audio.so.2.0       libsfml-window-s.a
libcsfml-network.so.2	    libsfml-graphics-d.so      libsfml-window.so
libcsfml-network.so.2.0     libsfml-graphics-d.so.2    libsfml-window.so.2
libcsfml-system-d.so	    libsfml-graphics-d.so.2.0  libsfml-window.so.2.0
libcsfml-system-d.so.2	    libsfml-graphics-s.a       pkgconfig
libcsfml-system-d.so.2.0    libsfml-graphics.so        python2.7

[vexx21322]

Swebonny posted:

Likes this?

\[1\.1(.1)*\]

Edited:

Basically checks if the value that comes after "[1.1" is (.1) and then check if it appears zero or more times then add bracket.

Should have been a little more clear. I don't care what comes after the 1.1, but this actually works fine for what I need right now. Thanks.

[Nigey Nige]

Odd bugs as I'm trying to get to grips with Love2d. Here's my main.lua:

require "camera.lua"

function love.load()
	
	love.graphics.setBackgroundColor(0, 0, 150)
	love.graphics.setMode(800, 600, false, true, 0)
	
end

function love.update(dt)
	
	if (love.keyboard.isDown("a")) then
		camera.move(-1, 0)
	end
	
	if (love.keyboard.isDown("d")) then
		camera.move(1, 0)
	end
	
	if (love.keyboard.isDown("s")) then
		camera.move(0, 1)
	end
	
	if (love.keyboard.isDown("w")) then
		camera.move(0, -1)
	end
	
	if (love.keyboard.isDown("e")) then
		camera.rotate(1)
	end
	if (love.keyboard.isDown("q")) then
		camera.rotate(-1)
	end
	
end

function love.draw()

	camera:set()
	--draw stuff
	love.graphics.print("NIGEY NIGE", 300, 300)
	camera:unset()

end

And here's my camera class:

camera = {}
camera.x = 0
camera.y = 0
camera.scaleX = 1
camera.scaleY = 1
camera.rotation = 0

function camera:set()
	love.graphics.push()
	love.graphics.rotate(-camera.rotation)
	love.graphics.scale(1 / camera.scaleX, 1 / camera.scaleY)
	love.graphics.translate(-camera.x, -camera.y)
end

function camera:unset()
	love.graphics.pop()
end

function camera:move(dx, dy)
	camera.x = camera.x + (dx or 0)
	camera.y = camera.y + (dy or 0)
end

function camera:rotate(dr)
	camera.rotation = camera.rotation + dr
end

function camera:scale(sx, sy)
	sx = sx or 1
	camera.scaleX = camera.scaleX * sx
	camera.scaleY = camera.scaleY * (sy or sx)
end

function camera:setPosition(x, y)
	camera.x = x or camera.x
	camera.y = y or camera.y
end

function camera:setScale(sx, sy)
	camera.scaleX = sx or camera.scaleX
	camera.scaleY = sy or camera.scaleY
end

The camera only moves when I press W or S, and then it moves sideways rather than up and down. I don't even know what the fuck

[Swebonny]

vexx21322 posted:

Should have been a little more clear. I don't care what comes after the 1.1, but this actually works fine for what I need right now. Thanks.

Ah okay, then you can simply use \w (represents [a-zA-Z_0-9]).

\[1\.1(.\w*)*\], it should now match with anything that starts with "[1.1" and ends with "]"

[high]

Richy19 posted:

Anyone know why Im getting this with linux when I try to run a SFML app?

./SFMLTest: error while loading shared libraries: libsfml-graphics.so.2: cannot open shared object file: No such file or directory

I have all the libraries:

richy@richy-Len:/usr/local/lib$ dir
Box2D			    libcsfml-system.so	       libsfml-graphics.so.2
libBox2D.a		    libcsfml-system.so.2       libsfml-graphics.so.2.0
libBox2D.so		    libcsfml-system.so.2.0     libsfml-network-d.so
libBox2D.so.2.1.0	    libcsfml-window-d.so       libsfml-network-d.so.2
libcsfml-audio-d.so	    libcsfml-window-d.so.2     libsfml-network-d.so.2.0
libcsfml-audio-d.so.2	    libcsfml-window-d.so.2.0   libsfml-network-s.a
libcsfml-audio-d.so.2.0     libcsfml-window.so	       libsfml-network.so
libcsfml-audio.so	    libcsfml-window.so.2       libsfml-network.so.2
libcsfml-audio.so.2	    libcsfml-window.so.2.0     libsfml-network.so.2.0
libcsfml-audio.so.2.0	    libsfgui-d.so	       libsfml-system-d.so
libcsfml-graphics-d.so	    libsfgui-s.a	       libsfml-system-d.so.2
libcsfml-graphics-d.so.2    libsfgui-s-d.a	       libsfml-system-d.so.2.0
libcsfml-graphics-d.so.2.0  libsfgui.so		       libsfml-system-s.a
libcsfml-graphics.so	    libsfml-audio-d.so	       libsfml-system.so
libcsfml-graphics.so.2	    libsfml-audio-d.so.2       libsfml-system.so.2
libcsfml-graphics.so.2.0    libsfml-audio-d.so.2.0     libsfml-system.so.2.0
libcsfml-network-d.so	    libsfml-audio-s.a	       libsfml-window-d.so
libcsfml-network-d.so.2     libsfml-audio.so	       libsfml-window-d.so.2
libcsfml-network-d.so.2.0   libsfml-audio.so.2	       libsfml-window-d.so.2.0
libcsfml-network.so	    libsfml-audio.so.2.0       libsfml-window-s.a
libcsfml-network.so.2	    libsfml-graphics-d.so      libsfml-window.so
libcsfml-network.so.2.0     libsfml-graphics-d.so.2    libsfml-window.so.2
libcsfml-system-d.so	    libsfml-graphics-d.so.2.0  libsfml-window.so.2.0
libcsfml-system-d.so.2	    libsfml-graphics-s.a       pkgconfig
libcsfml-system-d.so.2.0    libsfml-graphics.so        python2.7

Is /usr/local/lib in your $PATH? That is my only guess as to whats wrong.

[Richy19]

high posted:

Is /usr/local/lib in your $PATH? That is my only guess as to whats wrong.

Doint a sudo ldconfig fixed it :P

[Funley]

In XNA, i have a tilemap. Every tile in it is stored in a list. I need to store the sandpath in a separate list but still have it in the normal tile list. The path pieces have to be ordered in the list so that the first piece in the list is the one next to the green blob (start), the rest ordered on how the path goes and the last is next to the gray square (end). I have no idea how to do this. I added some numbers to the image to simply show how i want the ordered.

[Richy19]

With C# is it possible to pass a function as a parameter?
I wanst to make a button class, but I want to pass it a function to call if its clicked on.

[vexx21322]

Swebonny posted:

Ah okay, then you can simply use \w (represents [a-zA-Z_0-9]).

\[1\.1(.\w*)*\], it should now match with anything that starts with "[1.1" and ends with "]"

Had to slightly modify it, but that worked much better. Thanks.

[affail]

In Java/Android how can I use one class file with all my menu code over all of my views?

[Simspelaaja]

Richy19 posted:

With C# is it possible to pass a function as a parameter?
I wanst to make a button class, but I want to pass it a function to call if its clicked on.

public delegate void DoStuffDelegate();

public class Button
{
	private DoStuffDelegate _function;
	
	public Button(DoStuffDelegate function)
	{
		_function = function;
	}
	
	public OnPress()
	{
		_function();
	}
}

Untested.

[Eudoxia]

Suppose you have an interpreter that needs to look up the name of the function you're calling to decide what to do, which would be faster?

enum function_codes {core_this, core_that,...}

map<string,function_codes> language_core;

string function = //Draw from input
if(language_core.find(function) != language_core.end())
{
   function_codes code = it->second;
   switch(code)
   {
      case core_this:
         return core_This(argNumber,input);
         break;
      ...
   }
}

string function = //Draw from input
if(function == "this")
  return core_This(argNumber,input);
else if(function == "that")
  ...
else
{
  cerr << "Unknown function.";
  Unwind();
}

[PortalGod]

First of all, here's a picture of my project:



the panel with the border on the right is named "Tiles". That PictureBox you see is named "tile1", and is the only thing inside the Tiles panel. In my code, I have this:

For chkTile = 1 To Count
    Dim oldTile As PictureBox = Tiles.Controls.Item("tile" & chkTile)
    pbOrig.Image = oldTile.Image
    pbNew.Image = Tile
    isOld = CompareTiles(oldTile.Image, Tile)
Next

where Count is the number of elements in the "Tiles" panel (1), pbOrig is the small picturebox you see on the right at the bottom, and pbNew is the one on the left. pbOrig's image should be the same as the one is the "Tiles" panel, but it's the same as the "Tile" variable. Can anyone help?

[ZenX2]

Nigey Nige posted:

Odd bugs as I'm trying to get to grips with Love2d. Here's my main.lua:

-snop-

And here's my camera class:

-snop-

The camera only moves when I press W or S, and then it moves sideways rather than up and down. I don't even know what the fuck

You're using : when defining it. This is for methods, and it's a bit a syntactic sugar.

Basically, now, when you define camera:move(dx, dy), lua interprets this as camera.move(self, dx, dy). "self" is the table calling the function if you use table:method()

Because of this, when you are calling camera.move(1, 0) or a variation of that, you're passing 1 as self, and 0 as dx.


Also, I just realized that I made v2 over a year ago. I hadn't realized that I've been chilling with you guys for that long.

[Em See]

Just a quick one, I'm getting started with Java programming (uni related, but I'm not complaining), using sublime for writing it and a command prompt (or terminal, depending on which computer I'm using) to compile and run it.

Now I made a quick first project which takes say "30C" and interprets it as 30 degrees to be converted from Celsius to Fahrenheit - this works perfectly, and I even found out I could make it use Swing prompts and messages instead of relying on standard outputs and inputs with the terminal.

.. But I can't run the .class outside of a terminal. It only functions if I run it via "java DegreesConversion" in a terminal, at which point the prompts appear and it functions as intended (without any communication to or from the terminal). When I launch the .class outside of the terminal (i.e. running it with the JRE in Ubuntu or in Windows), the loading cursor appears for half a second and disappears.

I'm not sure if this is because I'm just using a single .class? Has it got something to do with dependencies? I come from a .NET background so uh, I'm a bit stuck here.

[Swebonny]

Eudoxia posted:

Suppose you have an interpreter that needs to look up the name of the function you're calling to decide what to do, which would be faster?

enum function_codes {core_this, core_that,...}

map<string,function_codes> language_core;

string function = //Draw from input
if(language_core.find(function) != language_core.end())
{
   function_codes code = it->second;
   switch(code)
   {
      case core_this:
         return core_This(argNumber,input);
         break;
      ...
   }
}

string function = //Draw from input
if(function == "this")
  return core_This(argNumber,input);
else if(function == "that")
  ...
else
{
  cerr << "Unknown function.";
  Unwind();
}

I checked the map reference, and it stated that the ".find" executes in logarithmic time, while your second code seems to do things in constant time.
So the last one should be faster.
http://www.facepunch.com/threads/116...1#post34974180

[James xX]

I'm having a couple problems with a program I am making. I tried to get Lua in my project , except I get a link error each time and I have no clue why. I'm also trying to make an event system ( like the hook library in Garry's mod ) except I don't know how to store a function in an array ( and call it ). I would be extremely grateful if someone could help me out here. ( Ps : It's in c++ )

[Wyzard]

Swebonny posted:

I checked the map reference, and it stated that the ".find" executes in logarithmic time, while your second code seems to do things in constant time.

An if/else stack runs in linear time; the number of conditions that have to be tested varies linearly with the total number of conditions. (On average, it'll be about half of them.)

The map lookup is faster, but the switch(code) that follows it runs in linear time, which negates the benefit. It'd be better to have the object in the map contain a pointer to the function, or be a callable object itself, so that you don't have to do that second lookup after finding the map entry.

[Nigey Nige]

ZenX2 posted:

You're using : when defining it. This is for methods, and it's a bit a syntactic sugar.

Basically, now, when you define camera:move(dx, dy), lua interprets this as camera.move(self, dx, dy). "self" is the table calling the function if you use table:method()

Because of this, when you are calling camera.move(1, 0) or a variation of that, you're passing 1 as self, and 0 as dx.


Also, I just realized that I made v2 over a year ago. I hadn't realized that I've been chilling with you guys for that long.

Thanks man! I guess that's what I get for blindly following obscure tutorials.

[Swebonny]

Wyzard posted:

An if/else stack runs in linear time; the number of conditions that have to be tested varies linearly with the total number of conditions. (On average, it'll be about half of them.)

The map lookup is faster, but the switch(code) that follows it runs in linear time, which negates the benefit. It'd be better to have the object in the map contain a pointer to the function, or be a callable object itself, so that you don't have to do that second lookup after finding the map entry.

Ah yes, that's true. Forgot about that.

Directing my earlier post to yours.

[supersnail11]

How do I disable font smoothing in LÖVE?

[James xX]

I'm making my events.cpp file now, but I get linker errors when I use it.

events.cpp

// Events.cpp

#ifndef _EVENTS
#define _EVENTS

class Hook{
	public:
		void Func( );
		Hook( ){  };
};

class Event{

	private:

		Hook* HookedEvents[255];
		int AMT;

	public:

		Event( ){ AMT = 0; }
		~Event( ){ }

		void AddHook( Hook* MyHook ){
			AMT = AMT + 1;
			HookedEvents[ AMT ] = MyHook;
		}

		void Call( ){
			int a = 1;
			for ( a = 1; a <= AMT; a++){
				Hook* CurrentHook = HookedEvents[ a ];
				CurrentHook->Func();
			}
		}
};

#endif

Use:

// ...
Event* OnDraw = new Event;

// ... in a function
OnDraw->Call();

// ... 
class MyDrawHook : public Hook
{
	public:
		void Func(){ cout << "win"; }
};

// In a function:

MyDrawHook* MyDrawHook2 = new MyDrawHook;
OnDraw->AddHook( reinterpret_cast<Hook*>(MyDrawHook2) );

any ideas?

1>Main.obj : error LNK2001: unresolved external symbol "public: void __thiscall Hook::Func(void)" (?Func@Hook@@QAEXXZ)

[BlkDucky]

supersnail11 posted:

How do I disable font smoothing in LÖVE?

You should be able to draw the text to a buffer and then nearest neighbour scale it up or down as required.

I don't think you can disable it otherwise unless you use a bitmap font.

[Eudoxia]

Swebonny posted:

I checked the map reference, and it stated that the ".find" executes in logarithmic time, while your second code seems to do things in constant time.
So the last one should be faster.
http://www.facepunch.com/threads/116...1#post34974180

I went ahead and checked it, turns out direct "if else" takes twice as long. Then I saw the update to your post. I thought switch statements were all optimized and fast and shit, but it makes a lot of sense to keep the function in the map, and just doing something like "return it->second". Thanks dudebros.

[Swebonny]

Eudoxia posted:

I went ahead and checked it, turns out direct "if else" takes twice as long. Then I saw the update to your post. I thought switch statements were all optimized and fast and shit, but it makes a lot of sense to keep the function in the map, and just doing something like "return it->second". Thanks dudebros.

Thank Wyzard

[aerochug]

I wrote a simple C function to uppercase a string without altering the original. It works fine, except there's a weird bug that causes the 9th character to always change to the next letter in the alphabet (so r changes to s and a to b, etc.)

char* strtoupper(char* str)
{
	char* strup = "";
	int i;
	size_t i_max = sizeof(str) * sizeof(char*);

	for (i = 0; i < i_max; i++)
	{
		strup[i] = toupper(str[i]);
	}

	return strup;
}

printf("%s", strtoupper("Character Stats")); // outputs 'CHARACTES STATS'

Any ideas on what's causing this?

[Willox]

I've recently been working on a sort of "Game Engine" in XNA and I've got entities down etc, but I'm not sure on how to store/load/display maps, I've been trying all day and all the examples like to use height maps which I have come to hate.

My question is basically what method should I look in to other than height maps for maps in an XNA project.

[evil-tedoz]

aerochug posted:

I wrote a simple C function to uppercase a string without altering the original. It works fine, except there's a weird bug that causes the 9th character to always change to the next letter in the alphabet (so r changes to s and a to b, etc.)

char* strtoupper(char* str)
{
	char* strup = "";
	int i;
	size_t i_max = sizeof(str) * sizeof(char*);

	for (i = 0; i < i_max; i++)
	{
		strup[i] = toupper(str[i]);
	}

	return strup;
}

printf("%s", strtoupper("Character Stats")); // outputs 'CHARACTES STATS'

Any ideas on what's causing this?

Maybe you could try using strlen to get the size of your string.

[aerochug]

evil-tedoz posted:

Maybe you could try using strlen to get the size of your string.

That works, but the output doesn't change

[high]

aerochug posted:

I wrote a simple C function to uppercase a string without altering the original. It works fine, except there's a weird bug that causes the 9th character to always change to the next letter in the alphabet (so r changes to s and a to b, etc.)

char* strtoupper(char* str)
{
	char* strup = "";
	int i;
	size_t i_max = sizeof(str) * sizeof(char*);

	for (i = 0; i < i_max; i++)
	{
		strup[i] = toupper(str[i]);
	}

	return strup;
}

printf("%s", strtoupper("Character Stats")); // outputs 'CHARACTES STATS'

Any ideas on what's causing this?

You never allocate memory for strup. So you are probably getting some undefined behavior from writing to 'unallocated' memory.