Debug Ray Strange Result?

Hi, I'm following a tutorial series and I'm trying to create a debug ray from my character to my camera but for some reason its wrong. I have a transform child on my character that I am getting, and then I set the camera a distance away and up using this code where targetPosition will be the camera and follow.position is the character.

Code (csharp):

1. targetPosition = follow.position + follow.up * distanceUp - follow.forward * distanceAway;
2. Debug.DrawRay(follow.position, follow.up * distanceUp, Color.red);
3. Debug.DrawRay(follow.position, -1f* follow.forward * distanceAway, Color.blue);
4. Debug.DrawRay(follow.position, targetPosition, Color.green);

The strange thing is that the camera works as expected and follows the character, and the red and blue rays also work fine. The green ray however ends up just being a line from my character to some random point in the negative z axis miles away with no y axis at all. I've checked both the values at runtime and they are 5 apart in the z axis but appear to be more like 200. Even when I try to make a line from follow.position to follow.position I still get the same line. Any ideas whats going on?

 

The thing with DrawRay is that it doesnt cast from one point to the other but it casts from one point and extends the ray in the defined direction.
-> http://docs.unity3d.com/Documentation/ScriptReference/Debug.DrawRay.html

U did this correctly in the first two DrawRays...

 

Ahh thank you so much! I should have used draw line.

 

The green ray is being drawn from the follow.position in the direction represented by targetPosition, which I don't think is what you want. If you want to draw a ray from the follow.position in the direction the targetPosition is from the follow position then you would do:

Code (csharp):

1. Debug.DrawRay(follow.position, targetPosition - follow.position, Color.green);

I'm not certain how you're calculating the targetPosition, it looks like you might be getting some weird results due to precedence. But I'm not sure what exactly you're trying to accomplish so it could be right. Whatever the case, the code above will draw a ray in the direction of the targetPosition from the follow.position. If it's still off, check your math on targetPosition.