{"id":4353,"date":"2016-12-04T23:44:13","date_gmt":"2016-12-04T23:44:13","guid":{"rendered":"http:\/\/phoenixgamedevelopment.com\/blog\/?p=4353"},"modified":"2016-12-05T00:16:32","modified_gmt":"2016-12-05T00:16:32","slug":"p0-p-172-part-58-see-multiple-terrain-textures-with-blending","status":"publish","type":"post","link":"https:\/\/phoenixgamedevelopment.com\/blog\/p0-p-172-part-58-see-multiple-terrain-textures-with-blending\/","title":{"rendered":"P0-P-172: Part 58: SEE: Multiple Terrain Textures with blending"},"content":{"rendered":"

I have had to abandon the idea of using the existing colour-based rendering\/texturing system. I can’t find a way to send the data that I need per pixel, only per terrain chunk, which wouldn’t work (I could render each chunk with a different texture, but not each individual pixel, which would look terrible).<\/p>\n

I will therefore need to use the strategy that I used before with my previous terrain (P-152). Thankfully, I can send the min and max values of the terrain easily using the SEE, and the world position can be obtained from the shader in unity. I also need to send the center position of the terrain.<\/p>\n

I am concerned with using these values however, since the world position and center position of the planet are very large floating point numbers, and I may have precision issues when working with them. For now, I have actually decided to use doubles, not floats, in the shader (doubles being 64-bit, rather than 32-bit) but doubles are only supported, I believe, in shader model 5 (Some of the 4.* updates may also support doubles, I am not sure).<\/p>\n

Shader model 5 is the newest shader model, and as such, would not be supported by the majority of hardware yet. This causes a significant compatibility problem. I will need to create some kind of “fallback” option in the future, but for now, this option works, and I can evenly subdivide the terrain based on height.<\/p>\n

I am also concerned with how this solution with work for very distance planets, or multiple planets, I haven’t had a chance to test this yet. I am confident that I will be able to solve these issues if and when I run into them though.<\/p>\n

I now need to blend each layer, which should be fairly simple, since I can refer back to the shaders I wrote in P-152.<\/p>\n

\"Unity<\/a>
Unity
29\/11\/2016 , 08:21:28 PM
Unity Personal (64bit) – P0Main.unity – New Unity Project – PC, Mac & Linux Standalone*<\/figcaption><\/figure>\n
\"Unity<\/a>
Unity
29\/11\/2016 , 08:22:16 PM
Unity Personal (64bit) – P0Main.unity – New Unity Project – PC, Mac & Linux Standalone*<\/figcaption><\/figure>\n
\"Unity<\/a>
Unity
29\/11\/2016 , 08:25:51 PM
Unity Personal (64bit) – P0Main.unity – New Unity Project – PC, Mac & Linux Standalone*<\/figcaption><\/figure>\n
\"Unity<\/a>
Unity
30\/11\/2016 , 01:06:36 AM
Unity Personal (64bit) – P0Main.unity – New Unity Project – PC, Mac & Linux Standalone<\/figcaption><\/figure>\n
\"Unity<\/a>
Unity
01\/12\/2016 , 10:31:02 PM
Unity Personal (64bit) – P0Main.unity – New Unity Project – PC, Mac & Linux Standalone*<\/figcaption><\/figure>\n

 <\/p>\n","protected":false},"excerpt":{"rendered":"

I have had to abandon the idea of using the existing colour-based rendering\/texturing system. I can’t find a way to send the data that I need per pixel, only per terrain chunk, which wouldn’t work (I could render each chunk with a different texture, but not each individual pixel, which would look terrible). I will […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3,17,10,11],"tags":[],"class_list":["post-4353","post","type-post","status-publish","format-standard","hentry","category-astral-realms","category-p-0","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\/4353"}],"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=4353"}],"version-history":[{"count":4,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/posts\/4353\/revisions"}],"predecessor-version":[{"id":4389,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/posts\/4353\/revisions\/4389"}],"wp:attachment":[{"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/media?parent=4353"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/categories?post=4353"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/phoenixgamedevelopment.com\/blog\/wp-json\/wp\/v2\/tags?post=4353"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}