World:Pick explanation of code.

[josk]

From this code from Aggror's tutorial

 

if (self.entity.world:Pick(point1,point2,pickinfo,0,true,Collision.Prop))

 

Can someone explain what true is for, read the docs but cant make sense.

• closest: if set to true, the closest intersection will be found, otherwise the operation will return as soon as a single intersection is found.
  

 

it's the intersection bit that confuses, wouldn't the closest intersection be the single intersection?

 

The cosde works fine its always good to know why things work.

[Josh]

When the closest detection is searched for, it is a slower test. Basically, each time a collision occurs, the line is shortened and it continues to test until a closer collision is found. This is good for projectiles, but if you're just doing a simple line of sight for AI or something, then it's a lot faster to pass false in this parameter. However, this will not return any useful info in the PickInfo position and normal fields.

[AggrorJorn]

You can watch this parameter in action here:

 

[josk]

Understood, thanks. Will watch the rest of that tutorial later.