learn-wgpu/assets/js/5.543d7edb.js

(window.webpackJsonp=window.webpackJsonp||[]).push([[5],{204:function(t,s,a){t.exports=a.p+"assets/img/happy-tree.bdff8a19.png"},205:function(t,s,a){t.exports=a.p+"assets/img/address_mode.66a7cd1a.png"},206:function(t,s,a){t.exports=a.p+"assets/img/upside-down.d50c3643.png"},207:function(t,s,a){t.exports=a.p+"assets/img/happy-tree-uv-coords.aa3b7d36.png"},208:function(t,s,a){t.exports=a.p+"assets/img/rightside-up.75f852e2.png"},258:function(t,s,a){"use strict";a.r(s);var n=a(10),e=Object(n.a)({},(function(){var t=this,s=t.$createElement,n=t._self._c||s;return n("ContentSlotsDistributor",{attrs:{"slot-key":t.$parent.slotKey}},[n("h1",{attrs:{id:"textures-and-bind-groups"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#textures-and-bind-groups"}},[t._v("#")]),t._v(" Textures and bind groups")]),t._v(" "),n("p",[t._v("Up to this point we have been drawing super simple shapes. While we can make a game with just triangles, trying to draw highly detailed objects would massively limit what devices could even run our game. However, we can get around this problem with "),n("strong",[t._v("textures")]),t._v(".")]),t._v(" "),n("p",[t._v("Textures are images overlayed on a triangle mesh to make it seem more detailed. There are multiple types of textures such as normal maps, bump maps, specular maps and diffuse maps. We're going to talk about diffuse maps, or more simply, the color texture.")]),t._v(" "),n("h2",{attrs:{id:"loading-an-image-from-a-file"}},[n("a",{staticClass:"header-anchor",attrs:{href:"#loading-an-image-from-a-file"}},[t._v("#")]),t._v(" Loading an image from a file")]),t._v(" "),n("p",[t._v("If we want to map an image to our mesh, we first need an image. Let's use this happy little tree:")]),t._v(" "),n("p",[n("img",{attrs:{src:a(204),alt:"a happy tree"}})]),t._v(" "),n("p",[t._v("We'll use the "),n("a",{attrs:{href:"https://crates.io/crates/image",target:"_blank",rel:"noopener noreferrer"}},[t._v("image crate"),n("OutboundLink")],1),t._v(" to load our tree. 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"),n("span",{pre:!0,attrs:{class:"token operator"}},[t._v("&")]),n("span",{pre:!0,attrs:{class:"token namespace"}},[t._v("wgpu"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("::")])]),n("span",{pre:!0,attrs:{class:"token class-name"}},[t._v("TextureDescriptor")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v("{")]),t._v("\n        "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// All textures are stored as 3D, we represent our 2D texture")]),t._v("\n        "),n("span",{pre:!0,attrs:{class:"token comment"}},[t._v("// by setting depth to 1.")]),t._v("\n        size"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(":")]),t._v(" texture_size"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(",")]),t._v("\n        mip_level_count"),n("span",{pre:!0,attrs:{class:"token punctuation"}},[t._v(":")]),t._v(" "),n("span",{pre:!0,attrs:{class:"token number"}},[t._v("1")]),n("span",{pre:!0,attrs:{class:"token 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