My Quad Tree test program is progressing well. I have a fairly good idea now about how to use Quad Trees in a spherical terrain implementation. What I intend to do with my project is:<\/p>\n
First, create several different versions of the spherical terrain, at different levels of detail (For example, 256*256, 512*512, 1024*1024, etc). This data will likely be stored temporarily in vectors.<\/p>\n
Then, a single quad tree will be created, which will store the terrain information for all LOD’s in it’s hierarchy of nodes.<\/p>\n
I can then quickly parse the quadtree, using a distance based calculation (based on the players position) to decide if a particular node should be returned at it’s current resolution, or subdivided into a lower resolution. I will also need some way to group or “chunk” together several nodes surrounding the player.<\/p>\n
Early tests indicate that the quad tree design that I have created does, indeed, perform much better than brute force (manually parsing all terrain pixels). One preliminary test resulted in my quadtree program processing just 12 terrain vertices, where a brute force algorithm faced with the same problem had to process 84 verts. This is a 7-fold performance improvement, and it seems that as the terrain becomes more detailed, the performance gains are even higher.<\/p>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
My Quad Tree test program is progressing well. I have a fairly good idea now about how to use Quad Trees in a spherical terrain implementation. What I intend to do with my project is: First, create several different versions of the spherical terrain, at different levels of detail (For example, 256*256, 512*512, 1024*1024, etc). […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,10,11],"tags":[],"class_list":["post-1318","post","type-post","status-publish","format-standard","hentry","category-astral-realms","category-software-and-games","category-spiritus-astrum","has-post-title","has-post-date","has-post-category","has-post-tag","has-post-comment","has-post-author",""],"aioseo_notices":[],"builder_content":"","_links":{"self":[{"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/posts\/1318"}],"collection":[{"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/comments?post=1318"}],"version-history":[{"count":1,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/posts\/1318\/revisions"}],"predecessor-version":[{"id":1319,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/posts\/1318\/revisions\/1319"}],"wp:attachment":[{"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/media?parent=1318"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/categories?post=1318"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/tags?post=1318"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}