{"id":4839,"date":"2018-10-31T15:32:19","date_gmt":"2018-10-31T07:32:19","guid":{"rendered":"https:\/\/unitycoder.com\/blog\/?p=4839"},"modified":"2018-11-02T16:10:48","modified_gmt":"2018-11-02T08:10:48","slug":"find-nearby-objects-using-cullinggroup","status":"publish","type":"post","link":"https:\/\/unitycoder.com\/blog\/2018\/10\/31\/find-nearby-objects-using-cullinggroup\/","title":{"rendered":"Find Nearby Objects using CullingGroup"},"content":{"rendered":"

\"\"<\/p>\n

Saw this tip at #UniteKL18, fast way to get nearby objects using CullingGroup<\/a>!
\n(main image with 5000 gameobjects, searching objects within 3m radius)<\/p>\n

example source code:
\n<\/strong>https:\/\/github.com\/UnityCommunity\/UnityLibrary\/blob\/master\/Assets\/Scripts\/Docs\/UnityEngine\/CullingGroupExample.cs<\/a><\/p>\n

my example project:<\/strong>
\nhttps:\/\/github.com\/unitycoder\/GetNearestObjectsWithCullingGroup<\/a><\/p>\n

Some notes on that:<\/strong>
\n– You need to have MainCamera in the scene (as it uses that in “cullGroup.targetCamera = Camera.main;”)
\n– You need to set proper bounds for your objects, i’m currently doing that inside that for-loop (see b<\/span>.position=..<\/span> and b<\/span>.radius=..)
\n– i’m using array of Renderers to keep track of spawned objects (just to make it easy to change color without GetComponent<Renderer>), but you might want to use List, so that can add\/remove objects there easily.
\n– I’m spawning objects on 2D circle, but this would work in 3D too
\n<\/span><\/p>\n

—<\/p>\n

TODO<\/strong>
\n– Compare speed with OnTriggerEnter, Physics.OverlapSphere, BruteForce LINQ distances query, KD\/QuadTree
\n– Test how this works with moving objects? (to get closest enemies for player..)
\n– Test how to get closests objects to 2 points? (probably cannot easily?)<\/p>\n

—<\/p>\n

Can also check which objects are outside camera view:
\n\"\"<\/p>\n","protected":false},"excerpt":{"rendered":"

Saw this tip at #UniteKL18, fast way to get nearby objects using CullingGroup! (main image with 5000 gameobjects, searching objects within 3m radius) example source code: https:\/\/github.com\/UnityCommunity\/UnityLibrary\/blob\/master\/Assets\/Scripts\/Docs\/UnityEngine\/CullingGroupExample.cs my example project: https:\/\/github.com\/unitycoder\/GetNearestObjectsWithCullingGroup Some notes on that: – You need to have MainCamera in the scene (as […]<\/p>\n","protected":false},"author":1,"featured_media":4841,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_publicize_message":"Find Nearby Objects using CullingGroup #UnityTips","jetpack_publicize_feature_enabled":true,"jetpack_social_post_already_shared":true,"jetpack_social_options":{"image_generator_settings":{"template":"highway","default_image_id":0,"font":"","enabled":false},"version":2},"jetpack_post_was_ever_published":false},"categories":[804,3],"tags":[1064,1063,433,444,447,463,445,1065],"class_list":["post-4839","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-scripts","category-unity3d","tag-closest","tag-cullinggroup","tag-fast","tag-find","tag-nearest","tag-objects","tag-search","tag-transforms"],"jetpack_publicize_connections":[],"jetpack_featured_media_url":"https:\/\/i0.wp.com\/unitycoder.com\/blog\/wp-content\/uploads\/2018\/10\/cullinggroup-nearby-objects.gif?fit=580%2C286&ssl=1","jetpack_shortlink":"https:\/\/wp.me\/p1KTaT-1g3","jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts\/4839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/comments?post=4839"}],"version-history":[{"count":8,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts\/4839\/revisions"}],"predecessor-version":[{"id":4850,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/posts\/4839\/revisions\/4850"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/media\/4841"}],"wp:attachment":[{"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/media?parent=4839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/categories?post=4839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/unitycoder.com\/blog\/wp-json\/wp\/v2\/tags?post=4839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}