Messages

1

Graphics / Re: Nothing in Graphics module compiles!

« on: January 29, 2015, 04:55:55 am »

A quick look to the error and I would ask :

Did you link the jpeg libs to your project? Because most of them are jpeg related.

2

General / Re: Linking error (I believe). Need help.

« on: January 26, 2015, 11:05:27 pm »

You entered the libraries in the wrong order...

In Codeblocks, the very first library at the top is the last to be link.

3

Java / Re: Update window?

« on: January 24, 2015, 06:22:26 pm »

Simply use the link Hapax gave you:

//Fill the window with red
    window.clear(Color.RED);

 //Display (Redraw the window)
    window.display();
 

4

General / Re: Memory leak

« on: August 22, 2014, 12:15:31 am »

When do you delete RectSprite? Also if you want to create a tile map (Or anything with a grid) use sf::VertexArray instead.

5

Graphics / Re: Angle between 2 points

« on: August 21, 2014, 04:01:23 pm »

I do know what is an arctan. My english is not very good and I probably didn't said what I wanted to say.

I will rephrase:

atan2 is waiting for two value x and y and after compute arctan(y/x), however the y and x value must come from
a rectangle triangle.

Try computing the angle between pointA = (0,3), pointB  = (1/2, sqrt(3)/2) using the formula of electrux gives an angle of 90... but the true angle is 30 degres between them.

On the other hand the scalar product gives the correct angle:

<A,B> = Ax Bx + Ay By = ||A|| ||B|| cos (angle) => angle = acos( (Ax Bx + Ay By) / (||A|| ||B||) )

6

Graphics / Re: Angle between 2 points

« on: August 21, 2014, 02:31:40 pm »

Be careful with trigonometric function, they only works with rectangle-triangles (As one 90 degres angle).

If your triangle is not rectangle then use scalar product.

Also to calculate an angle you need three points, not 2.

7

Graphics / Re: Odd values for a sprite I'm trying to display

« on: July 01, 2014, 10:04:29 pm »

Use reference.

sf::Sprite& GetSprite(){ return sprite; }
 

I am pretty sure it will works.

8

General / Re: Entity Manager

« on: June 11, 2014, 06:13:19 am »

Can I see what you did, I am pretty sure you did not fix it properly.

9

General / Re: Entity Manager

« on: June 11, 2014, 06:07:30 am »

It's more an C++ issue than a SFML one...

But

void addEntity(Entity* e)
 

is waiting for an Entity*, but you do not pass any in here

game.addEntity();
 

10

Graphics / Re: Line spacing error

« on: May 30, 2014, 08:04:26 pm »

Also rather than using

xPos += 12;

, the glyph class provide an advance value for each glyph.

11

Graphics / Re: VertexArray is not drawn

« on: May 30, 2014, 07:39:44 pm »

I tried your code on my PC and everything works fine. Try checking if Tileset is correctly load

if( !m_tileset.loadFromFile("Tileset.png") )
{
return -1; //error
}
 

12

General / Re: understanding noncopyable objects

« on: May 24, 2014, 04:35:08 am »

changeWindow(sf::RenderWindow &window) : mainWindow(&window)
{
    mainWindow -> window;
}
 

I have a basic understanding of passing objects by reference and using pointers but what I really don't understand is, what the heck is that colon and the "->" doing or what it's called?

In short

mainWindow -> window;

//is equivalent to

(*mainWindow).window
 

To explain it in simple words the -> access what is pointed by a pointer. Search pointer on the net for clear detail (Or check official C++ website). Also, the colon is related to constructor and is a common way to initialize attributes. So search "C++ constructor" on the net...

13

Graphics / Re: The shapes are not been position correctly?

« on: May 16, 2014, 05:55:55 am »

So i'm trying to position the rectangle in the middle of the window, however, everytime i increase the y value of the rectangle position, it seems to go down instead. Here is the code:

It's normal, (0,0) is the upper left part of the screen. Increasing y value will make your rectangle to go down.

How can i get the rectangle in the middle?

x = Screen Width / 2 - Rectangle width / 2
y = Screen Height / 2 - Rectangle Height / 2

14

C / Re: can't set sfVector2f in 2.1?

« on: May 07, 2014, 06:16:10 am »

It's been a while since I programmed in C ( I now program in C++11 ).

 If sfVector2f is a struct (which is probably the case), you can use an initializer list

sfVector2f Vector = { floatX, floatY };
 

for the other part:

sfCircleShape_setPosition(shape,(sfVector2f){wmode.width/2.0f - radius, wmode.height/2.0f - radius})
 

I can not tell. Sorry.

15

C / Re: can't set sfVector2f in 2.1?

« on: May 07, 2014, 02:16:44 am »

It's clear what the problem is...

You are trying to create a instance of a class in the C language. Class does not exists in C.