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Cannot get traces to return hits

I have got a problem with tracing in blueprint in that whenever I trace something I get no results whatsoever.

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In the example, I have set up a staticmeshactor to do a spheretrace. No matter what objects I set for detection, it won't return a true. I have double checked the actor's object responses and it has been set to BlockAll, so as far as I know, I should at least get it to return a true on itself. I have also tried a trace by channel, but it's the exact same result. Nothing.

Since I am trying to do the behavior tree tutorial, I really need these traces to work. At the moment, I cannot get that tutorial to work either since, again, no matter what I do the traces simply return nothing.

Product Version: UE 4.8
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traceerror.jpg (423.5 kB)
traceerror_bp.jpg (491.1 kB)
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asked Aug 10 '15 at 09:36 AM in Blueprint Scripting

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cridia
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1 answer: sort voted first

1: is your input array of object types to detect populated.

2: On the end location add a small vector of 0,0,15 I think the sphere traces works by moving a sphere for X radius along a line from start > end, therefore your end needs to be different from the start point.

Also make sure if your detecting all object types to ignore yourself.

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answered Aug 10 '15 at 09:57 AM

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Lankeytom
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avatar image cridia Aug 11 '15 at 12:40 AM

It was the second. I had properly taken care of 1 (to the point of throwing in all possible objects at one point). I had no idea that the positions needed to be different. I thought that as long as the Radius was not 0, I would be good to go.

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