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Help => Graphics => Topic started by: haxortiz on March 09, 2010, 09:30:38 pm

Title: Best X & Y Position
Post by: haxortiz on March 09, 2010, 09:30:38 pm

What's the best way to find and move the X and Y position of a sprite?

And i can i use a vector for Velocity of this sprite.

Thanks,

Haxortiz

Title: Best X & Y Position
Post by: Nexus on March 09, 2010, 09:37:06 pm

Quote from: "haxortiz"

What's the best way to find and move the X and Y position of a sprite?

Did you even look at the documentation? The methods have obvious names...

Quote from: "haxortiz"

And i can i use a vector for Velocity of this sprite.

Yes, but this is not a property of a sprite, rather of the logical object (for example a space ship). So, let the respective class have a sf::Vector2f member that represents the velocity.

Title: Best X & Y Position
Post by: haxortiz on March 09, 2010, 09:56:34 pm

How can I use sf::Vector2f to do the velocity of the sprite, can I have an example please.

Thanks,

Haxortiz

Title: Best X & Y Position
Post by: Laurent on March 09, 2010, 11:11:48 pm

Code: [Select]

sprite.Move(velocity * elapsedTime);

Title: Best X & Y Position
Post by: haxortiz on March 10, 2010, 12:23:25 am

Quote from: "Laurent"

Code: [Select]

sprite.Move(velocity * elapsedTime);

Thanks this example really helped,

Haxortiz

Title: Best X & Y Position
Post by: haxortiz on March 10, 2010, 05:23:25 pm

Well I'm doing a submarine that moves across so I used

Code: [Select]

player.Move(subVelocity * elapsedTime);

To move it across but how can I add or subtact to make it go faster or slower when the user press a key?

Thanks,

Haxortiz

Title: Best X & Y Position
Post by: Nexus on March 10, 2010, 05:26:32 pm

Increase/decrease the velocity? Use an if statement? :idea:

If you don't know how to react to keyboard input, you should read the tutorials.

Title: Best X & Y Position
Post by: haxortiz on March 10, 2010, 05:39:12 pm

Quote from: "Nexus"

Increase/decrease the velocity? Use an if statement? :idea:

If you don't know how to react to keyboard input, you should read the tutorials.

I have, this is what i got so far...

Code: [Select]

if (App.GetInput().IsKeyDown(sf::Key::D))
{
if(player.getEnergy()>100)
{
if(player.getPositionX()!= (game.getWidth()- 100))
 {
  player.Move(subVelocity * elapsedTime);
  player.setEnergy(player.getEnergy()-1);
 }
}
}

But everytime I try and use + or -, it starts having errors. Is there a better way?

[Edit]Doesn't Matter, done it now. Wow some really noobish errors in that coding. Haha, Thanks for the help.

Haxortiz[/Edit][/b]