Yet another SFML question.

[DarkSpirit05er]

I'm feeling bad already for asking these much questions, sorry about that.

How do I get a camera to follow a sprite? I tried pretty much everything that I can think of.

Thanks again kind gentlemen.

[cpp]
#include <SFML/Graphics.hpp>

int WINAPI WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
{

sf::RenderWindow Window(sf::VideoMode(800, 600, 32), "Zombie Game Alpha");

sf::Image PlayerImage;
sf::Image Background;
Background.LoadFromFile("background.png");
PlayerImage.LoadFromFile("player.png");
sf::Sprite Player(PlayerImage);
sf::Sprite BackgroundS(Background);
sf::Sprite* follow = &Player;
Player.SetPosition(400,300);

sf::View Camera(sf::Vector2f(400.f, 300.f), sf::Vector2f(400.f, 300.f));
sf::Vector2f PPos = Player.GetPosition();

while(Window.IsOpened())
{
sf::Event Event;
while (Window.GetEvent(Event))
{
if (Event.Type == sf::Event::Closed)
Window.Close();
if ((Event.Type == sf::Event::KeyPressed) && (Event.Key.Code == sf::Key::Escape))
Window.Close();
}

float ElapsedTime = Window.GetFrameTime();

if (Window.GetInput().IsKeyDown(sf::Key::W)) Player.Move(0, -425 * ElapsedTime);
if (Window.GetInput().IsKeyDown(sf::Key::S)) Player.Move(0, 425 * ElapsedTime);
if (Window.GetInput().IsKeyDown(sf::Key::A)) Player.Move(-425 * ElapsedTime, 0);
if (Window.GetInput().IsKeyDown(sf::Key::D)) Player.Move(425 * ElapsedTime, 0);

Player.SetCenter(Player.GetSize() / 2.f);
if (Window.GetInput().GetMouseX() <= Player.GetPosition().x) {
Player.SetRotation(((-1* 360 / 3.1415926535 * (atan2(static_cast<double>(Player.GetPosition().y - Window.GetInput().GetMouseY()), static_cast<double>(Player.GetPosition().x - Window.GetInput().GetMouseX()))))/2)+90);
} else {
Player.SetRotation(((-1* 360 / 3.1415926535 *(atan2(static_cast<double>(Player.GetPosition().y - Window.GetInput().GetMouseY()), static_cast<double>(Player.GetPosition().x - Window.GetInput().GetMouseX()))))/2)+90);
}

Camera.SetCenter(follow->GetCenter());

Window.Draw(BackgroundS);
Window.Draw(Player);
Window.SetView(Camera);
Window.Display();
}
}
[/cpp]

[Mattz333]

[url]http://www.sfml-dev.org/tutorials/1.5/graphics-views.php[/url]

Views

[DarkSpirit05er]

I know about views, I just don't know how to get it to follow a sprite in a top-down view.

[noctune9]

You need to have a pointer to the sprite and use the sprites GetCenter() functions and the views SetCenter(). Something like this:[cpp]
sf::Sprite* follow = &some_sprite
view.SetCenter(follow->GetCenter());[/cpp]

[DarkSpirit05er]

im dumb

[raccoon12]

[cpp]sf::Sprite* follow = &Player;[/cpp]

try that

[DarkSpirit05er]

Yeah, my mistake didn't put in the &. Still it doesn't work. I put "view.SetCenter(follow->GetCenter());" in the game loop and when I compile and run the background is flickering and stuff, the camera doesn't move.
And I don't understand HalfSize, the window is 800x600, what should I put in the HalfSize of the view?

[DeltaOps101]

[QUOTE=DarkSpirit05er;17142350]Yeah, my mistake didn't put in the &. Still it doesn't work. I put "view.SetCenter(follow->GetCenter());" in the game loop and when I compile and run the background is flickering and stuff, the camera doesn't move.
And I don't understand HalfSize, the window is 800x600, what should I put in the HalfSize of the view?[/QUOTE]

Uh, you put half the size of the view. For 800x600 you would create the view like this:
[cpp]sf::View view(sf::Vector2f(400.f, 300.f), sf::Vector2f(400.f, 300.f));[/cpp](you can obviously change the center to whatever you need)

[DarkSpirit05er]

Updated OP with non-working script.

[editline]09:44PM[/editline]

And to whomever is rating me funny deserves a punch in the face. I'm learning to program, I don't have full knowledge of everything so I'm terribly sorry if I make mistakes (not).

[noctune9]

Set the view before drawing.

[DarkSpirit05er]

Did, this happened:
[img]http://img32.imageshack.us/img32/6497/38941320.png[/img]

But the weird flickering stopped.

[ZeekyHBomb]

GetCenter might return a local vector (dunno tbh).
Try View.SetCenter(follow->GetPosition()).

[DarkSpirit05er]

Worked, thanks a lot! Although it seems like I need a really big background. Thanks again.