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Why isGet Components by Class always yielding array length of 20?


Can anyone explain to me why this is happening?

I have a level with landscape and an instanced foliage actor containing several hundred instances of a grass static mesh. When I use a Get Components By Class node, the output array always has a length of twenty, which means I must repeat my function many times if I have more than 20 instanced mesh components. I have tested with the class set to both FoliageInstancedStaticMeshComponent and InstancedStaticMeshComponent with the same result. I have also removed the painted foliage and started over. The array length is always 20.

Why is this happening? Is there a limitation in the way I can query the instanced foliage actor?

alt text

I am using the approach described here to remove overlapping foliage instances. It work well except for needing to fire the function many times to clear all the overlaps.

Product Version: UE 4.18
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asked Oct 25 '18 at 03:03 AM in Blueprint Scripting

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Got it! I was just confused.

Get Components By Class will output 1 element per foliage type you have painted with.

In the example image I posted above, Get Components By Class will return an array of the Foliage Types you have painted. So if you only paint with a single grass mesh foliage type, your array length will be one. If you have painted with 20 different foliage types, then the array length will be 20.

From there using a loop I test overlap for each foliage type and then remove instances of it.

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answered Oct 25 '18 at 04:53 AM

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