{"id":135,"date":"2014-02-20T02:01:23","date_gmt":"2014-02-20T02:01:23","guid":{"rendered":"http:\/\/blog.3pxh.com\/?p=135"},"modified":"2014-02-20T02:26:32","modified_gmt":"2014-02-20T02:26:32","slug":"a-first-look-unity-and-shaders","status":"publish","type":"post","link":"http:\/\/blog.3pxh.com\/?p=135","title":{"rendered":"A First Look: Unity and Shaders"},"content":{"rendered":"

I’ve been hearing about Unity for some time and I figured I’d finally check it out. The big takeaway from today: it is a monstrous piece of software and I have a lot to learn. It’s really powerful though, so that’s neat.<\/p>\n

I also decided to take my first dip into shaders given that unity makes it really easy to bind shaders to objects. So I read through a tutorial and looked at the math here<\/a>\u00a0to produce the following images (they’re animated as in the link above). These are all being done in a shader which is running on the gpu.<\/p>\n

\"Screen<\/a> \"Screen<\/a> \"Screen<\/a> \"Screen<\/a>\"Screen<\/a> \"Screen<\/a><\/p>\n

 <\/p>\n

For those interested in the shader, the short version (image 1 above) is below. It could probably be optimized a bit.<\/p>\n

float wave0 = sin(i.uv.x*300+_Time.y*.5);
\nfloat wave1 = sin((i.uv.x*.90096886+i.uv.y*.4338837)*300+_Time.y*.5);
\nfloat wave2 = sin((i.uv.x*.62348980185+i.uv.y*.78183148)*300+_Time.y*.5);
\nfloat wave3 = sin((i.uv.x*.22252093395+i.uv.y*.97492791218)*300+_Time.y*.5);
\nfloat wave4 = sin((i.uv.y*.97492791218-i.uv.x*.22252093395)*300+_Time.y*.5);
\nfloat wave5 = sin((i.uv.y*.78183148246-i.uv.x*.62348980185)*300+_Time.y*.5);
\nfloat wave6 = sin((i.uv.y*.43388373911-i.uv.x*.9009688679)*300+_Time.y*.5);
\nfloat z = 1.0\/(1.0+exp(-1.0*(wave0+wave1+wave2+wave3+wave4+wave5+wave6)*2));
\nreturn float4(z,z,z,1.0);<\/p>\n","protected":false},"excerpt":{"rendered":"

I’ve been hearing about Unity for some time and I figured I’d finally check it out. The big takeaway from today: it is a monstrous piece of software and I have a lot to learn. It’s really powerful though, so that’s neat. I also decided to take my first dip into shaders given that unity … Continue reading A First Look: Unity and Shaders<\/span> →<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-135","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"_links":{"self":[{"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=\/wp\/v2\/posts\/135","targetHints":{"allow":["GET"]}}],"collection":[{"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=135"}],"version-history":[{"count":4,"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=\/wp\/v2\/posts\/135\/revisions"}],"predecessor-version":[{"id":145,"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=\/wp\/v2\/posts\/135\/revisions\/145"}],"wp:attachment":[{"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=135"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=135"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/blog.3pxh.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=135"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}