adding sf::Vector2f ?

[battosaijenkins]

+Just a quick question,
 
is it possible to add multiple sf::Vector2f? For example I have a apos.x and apos.y in the form of sf::Vector2f apos.
If I have another sf::Vector2f bPos is there a way to .add() them like something equivalent in p5 js? Or do I just do apos.x + bpos.x  and then apos.y + bpos.y etc..? Thanks in advance!

[G.]

https://www.sfml-dev.org/documentation/2.5.1/classsf_1_1Vector2.php#a72421239823c38a6b780c86a710ead07

[Geheim]

In addition you can always add your own overloads if SFML does not provide them.

[battosaijenkins]

Oh that's right overload functions. I completely forgot about that, ok thank you.

[Nexus]

More overloaded operators

Overloaded functions are functions with the same name that can be invoked with different arguments, like this:

sf::Sprite s;
s.setPosition(2.5f, 7.f);               // call with float, float
s.setPosition(sf::Vector2f(2.5f, 7.f)); // call with sf::Vector2f

[battosaijenkins]

I apologize, that's what I meant to say overload operators not functions . By the way, after much experimentation I can't seem to find a multiplication for vectors.

For example:

Code: [Select]

float a = 5.f,
      b = 6.f,
      x = 8.f,
      y = 9.f;
sf::Vector2f apos(a, b);
sf::Vector2f bpos(x, y);
sf::Vector2f cpos;

cpos = apos + bpos; // 13 and 15
cpos = apos - bpos; // -3 and -3
// however
cpos = apos * bpos; // error no match for operator*
// But a scalar value works such as
cpos = apos * 4.f // output is 20 and 24


[Laurent]

Vector multiplication can have multiple mathematical meanings (component-wise, or cross product). So it is typically implemented as functions with explicit names rather than overloaded operator.

[battosaijenkins]

Ok thank you. I suppose I don't really need to multiply vectors but thought I'd ask since I was wondering why addition and subtractions were there. I don't really have any use for vector multiplication, at least not yet.

[Nexus]

In case you need more vector operations, I've implemented a bunch of them in Thor:
http://www.bromeon.ch/libraries/thor/documentation/v2.1/_vector_algebra2_d_8hpp.html

[battosaijenkins]

@Nexus nice! I'll check these out cheers!