Messages

1

Window / Change the View without having the source instance?

« on: December 01, 2011, 04:23:05 pm »

Hey, thanks for your reply.
But how can I change it in SFML 2?
I have setup SFML 2 now, but I don´t get the view changed.

I tried the following:

Code: [Select]

((sf::View) App->GetView()).Zoom(1.5f);

//way number 2
sf::View View(App->GetView());
View.Zoom(1.5f);
App->SetView(View);

But boths methods are not working


EDIT: It was my fault.
The second method is working. But my main-loop was resetting it always

Thanks for your help

2

Window / Change the View without having the source instance?

« on: December 01, 2011, 02:54:36 pm »

Hello, I have a little poblem with zooming and moving the view.

Normally I would do the following:

Code: [Select]

sf::View CustomView;
App.SetView(CustomView);
CustomView.Zoom(1.5f);

But what if the current Class don´t knows the view?
Do i have to inject it?

I looked into RenderWindow and found the following:
GetView()
So I tried the following:

Code: [Select]

App->GetView().Zoom(1.5f);
But this gave me an error.
I also tried some casting:

Code: [Select]

((sf::View) App->GetView()).Zoom(1.5f);

This doesn´t produce a compiler error, but at runtime nothing happens.

Is there a way to get and change the current View?

Thanks in Advance,

Simon[/code]

3

General / Problem with moving/turning a sprite in cursor direction

« on: December 01, 2011, 02:23:51 pm »

Thanks for your reply

I think I remembered something wrong with the 45/PI

But PI/2 are working fine I think.

But there still seams to be a problem with the center wenn the Sprite changes his position.

I got the following code:

Code: [Select]

float dx = App->GetInput().GetMouseX() - (playerPos.x - player.GetCenter().x);
float dy =  App->GetInput().GetMouseY() - (playerPos.y - player.GetCenter().y);

angle = atan2(dy, dx) + (PI/2);

player.SetRotation(-angle * 180 / PI);

But dx and dy are 0 when the mouse is far away from the position of the sprite.
Where is my mistake?

I also uploaded a video again, where everyone can see, how far the position is away.


Hope someone can help me


Thanks,

Simon

4

General / Problem with moving/turning a sprite in cursor direction

« on: November 30, 2011, 10:44:47 pm »

Thanks for the reply
The 45/PI was for adding 90 degress to the angle. It was a quick and dirty hack i tried because the rotation of the sprite had a wrong offset  

And the center isn´t the spritepos always the upper left corner?
So with:

Code: [Select]

float dx = App->GetInput().GetMouseX() - playerPos.x;
I would just get the difference from the upper left corner to the cursor, but i want the center to move in the cursors direction.

I hope it was understandable and you can help me better now


Thanks,

Simon

5

General / Problem with moving/turning a sprite in cursor direction

« on: November 30, 2011, 09:54:09 pm »

Hello SFML-Communiy,
I have a problem which makes me go crazy.

I try to move and turn a sprite in the direction of the cursor.
But it isn´t working very well.
The turning is almost working. But when i start moving the sprite the turning fails. (I think the center is moving or something like that )

The code for turning looks like the following:

Code: [Select]

float dx = App->GetInput().GetMouseX() - (playerPos.x - player.GetCenter().x);
float dy =  App->GetInput().GetMouseY() - (playerPos.y - player.GetCenter().y);

angle = atan2(dy, dx) + (45/PI);

player.SetRotation(-angle * 180 / PI );
This works not perfect, because for some reason the cursor is not in the middle of the sprite when I turn it to the left for example.


The code for the moving i use just looks like the following:

Code: [Select]

player.Move(-distance, 0);
So moving doesn´t do anything special yet.

The code I tried for moving in the cursor direction was the following:

Code: [Select]

float dY = sin(angle) * distance;
float dX = cos(angle) * distance;


this->player.Move(dX, dY);
where angle is the rotation of the player an distance the distance the sprite should move in the angle direction.

For a better understanding i also produced a little youtube video




I hope very much that someone can help me.

Thanks in advance,

Simon

6

C / Any easy physics engine you can recommend me?

« on: November 30, 2011, 09:46:07 pm »

Thanks, I will look at it, when I am ready with the rest

7

C / Any easy physics engine you can recommend me?

« on: November 30, 2011, 03:55:56 pm »

Thanks for the recommendation. I am going to look at Box2D because I am programming in C++.
I didn´t saw a forum for C++ so I choose the C-Forum.
Is the big help section for C++?

Thanks

Simon

8

C / Any easy physics engine you can recommend me?

« on: November 29, 2011, 09:38:20 pm »

Hello,
I wondered, wheather there is already an easy physics engine for 2d game programming. The best would be, if it already integrateds well with SFML.

It don´t have to be an full-featured engine.

It´s enough if it has some basic functionalities like collision detection and gravity.


Thanks in advance and sorry for my english, I´m from Germany

Simon