Question by Essential · Jan 28, 2012 at 06:52 AM · vector3 vector2 comparison

greater or less than with vector coordinates

How do I compare two Vectors and ask, "if either of the vector points is greater than equivalent points on this other vector" or "if either one of the vector points is greater than this number"?

I could do the check one at a time using x and y but I'm wondering if there's a simpler solution.

 // Get the target position in viewport space. The bottom left is (0,0) and the upper right is (1,1)
     private var targetViewportPosition : Vector2;
     targetViewportPosition = camera.WorldToViewportPoint (target.position);
 
 // Set bounding box limits
     private var boundingBottomLeft = Vector2(0.2, 0.2);
     private var boundingTopRight = Vector2(0.8, 0.8);
 
 if (boundingCheck
     && (targetViewportPosition < boundingBottomLeft
         || targetViewportPosition > boundingTopRight))

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syclamoth · Jan 28, 2012 at 07:00 AM 0

Yeah, I'm pretty sure that one way or another you'll end up having to compare them one at a time. On the other hand, there's no reason why you can't write a function that does that automatically, and just use that as a shortcut (ins$$anonymous$$d of having to write it out every time). It's the wonderful thing about turing-complete languages- if a function that you need doesn't exist, you can just write one!

Essential · Jan 28, 2012 at 07:05 AM 0

 if (boundingCheck && (targetViewportPosition.x < boundingBottomLeft
                         || targetViewportPosition.y < boundingBottomLeft
                         || targetViewportPosition.x > boundingTopRight
                         || targetViewportPosition.y > boundingTopRight))

That's the best I can do I suppose. I only need to check once but if I do need to check multiple times I'll create a function to do it. Thanks! :)

AlucardJay · Jan 28, 2012 at 07:10 AM 0

i'm really a noob, but this is what i had while running some tests : // GUI

function OnGUI ()

{

 // Show info

 GUI.Label (Rect (10, 10, 150, 25), "pos : " + rigidbody.position);

 GUI.Label (Rect (10, 30, 150, 25), "velocity : " + rigidbody.velocity);

 GUI.Label (Rect (10, 50, 150, 25), "speed : " + rigidbody.velocity.magnitude);

 GUI.Label (Rect (10, 70, 150, 25), "dist : " + dist.magnitude); // dist = player.transform.position - transform.position;

 GUI.Label (Rect (10, 90, 150, 25), "ang : " + transform.rotation.eulerAngles);

}

so there may be a way ins$$anonymous$$d of rigidbody's :

http://unity3d.com/support/documentation/ScriptReference/Vector2.html

scroll down to Class Functions.