<!DOCTYPE html><htmllang="en-US"><head><metacharset="UTF-8"><metahttp-equiv="X-UA-Compatible"content="IE=Edge"><title>Rig - </title><linkrel="shortcut icon"href="/favicon.ico"type="image/x-icon"><linkrel="stylesheet"href="/assets/css/just-the-docs-default.css"><script type="text/javascript"src="/assets/js/vendor/lunr.min.js"></script><script type="text/javascript"src="/assets/js/just-the-docs.js"></script><metaname="viewport"content="width=device-width, initial-scale=1"><!-- Begin Jekyll SEO tag v2.7.1 --><title>Rig</title><metaname="generator"content="Jekyll v4.2.0"/><metaproperty="og:title"content="Rig"/><metaproperty="og:locale"content="en_US"/><metaname="twitter:card"content="summary"/><metaproperty="twitter:title"content="Rig"/><script type="application/ld+json">{"headline":"Rig","@type":"WebPage","url":"/guide/rigging_mode/","@context":"https://schema.org"}</script><!-- End Jekyll SEO tag --></head><body><svgxmlns="http://www.w3.org/2000/svg"style="display: 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24"><usexlink:href="#svg-arrow-right"></use></svg></a><ahref="/pathtracer/environment_lighting"class="nav-list-link">(Task 7) Environment Lighting</a><ulclass="nav-list"><liclass="nav-list-item "><ahref="/pathtracer/importance_sampling"class="nav-list-link">Environment Light Importance Sampling</a></li></ul></li><liclass="nav-list-item "><ahref="/pathtracer/visualization_of_normals"class="nav-list-link">Visualization of normals</a></li></ul></li><liclass="nav-list-item"><ahref="#"class="nav-list-expander"><svgviewBox="0 0 24 24"><usexlink:href="#svg-arrow-right"></use></svg></a><ahref="/animation/"class="nav-list-link">A4: Animation</a><ulclass="nav-list "><liclass="nav-list-item "><ahref="/animation/splines"class="nav-list-link">Splines</a></li><liclass="nav-list-item "><ahref="/animation/skeleton_kinematics"class="nav-list-link">Skeleton Kinematics</a></li><liclass="nav-list-item "><ahref="/animation/skinning"class="nav-list-link">Skinning</a></li><liclass="nav-list-item "><ahref="/animation/particles"class="nav-list-link">Particles</a></li></ul></li></ul></nav><footerclass="site-footer"> This site uses <ahref="https://github.com/pmarsceill/just-the-docs">Just the Docs</a>, a documentation theme for Jekyll. </footer></div><divclass="main"id="top"><divid="main-header"class="main-header"><divclass="search"><divclass="search-input-wrap"><inputtype="text"id="search-input"class="search-input"tabindex="0"placeholder="Search "aria-label="Search "autocomplete="off"><labelfor="search-input"class="search-label"><svgviewBox="0 0 24 24"class="search-icon"><usexlink:href="#svg-search"></use></svg></label></div><divid="search-results"class="search-results"></div></div></div><divid="main-content-wrap"class="main-content-wrap"><navaria-label="Breadcrumb"class="breadcrumb-nav"><olclass="breadcrumb-nav-list"><liclass="breadcrumb-nav-list-item"><ahref="/guide/">User Guide</a></li><liclass="breadcrumb-nav-list-item"><span>Rig</span></li></ol></nav><divid="main-content"class="main-content"role="main"><h1id="rig"><ahref="#rig"class="anchor-heading"aria-labelledby="rig"><svgviewBox="0 0 16 16"aria-hidden="true"><usexlink:href="#svg-link"></use></svg></a> Rig </h1><h3id="rigging-setup"><ahref="#rigging-setup"class="anchor-heading"aria-labelledby="rigging-setup"><svgviewBox="0 0 16 16"aria-hidden="true"><usexlink:href="#svg-link"></use></svg></a> Rigging Setup </h3><p>Select the <codeclass="language-plaintext highlighter-rouge">Rig</code> tab to create a skeletal rig for an object.</p><p>You can create new bone by first selecting a parent joint and pressing <codeclass="language-plaintext highlighter-rouge">New Bone</code>, then click anywhere else on the object to place the bone. From thereon, you can repeat this process to create a chain of bones connected along the selected joint. If you want to branch off at a joint, simply click on the joint to branch off of, then start another chain by adding a new bone from there.</p><videosrc="/guide/rigging_mode/guide-rigging-1.mov"controls=""preload=""muted=""loop=""style="max-width: 100%; margin: 0 auto;"></video><p>To view a rigged example, see <codeclass="language-plaintext highlighter-rouge">media/human.dae</code> example and select the object in the Rig tab to view its joints. Once you’ve implemented forward kinematics the skeleton should be setup like so:</p><p><imgsrc="guide-rigging-human.png"alt="rigged-human"/></p><h3id="editing-skinning-weight-threshold-radius"><ahref="#editing-skinning-weight-threshold-radius"class="anchor-heading"aria-labelledby="editing-skinning-weight-threshold-radius"><svgviewBox="0 0 16 16"aria-hidden="true"><usexlink:href="#svg-link"></use></svg></a> Editing Skinning Weight Threshold Radius </h3><p>Each joint has an associated <codeclass="language-plaintext highlighter-rouge">Radius</code> which controls the part of the mesh influenced by the selected bone during animaton. The radius is visualized by the blue capsule around each bone and can be edited using the menu. The position of the joint can also be edited using the <codeclass="language-plaintext highlighter-rouge">Extent</code> values in the menu.</p><videosrc="/guide/rigging_mode/guide-rigging-2.mov"controls=""preload=""muted=""loop=""style="max-width: 100%; margin: 0 auto;"></video><p>Note that rigging only uses extents of the bone for skeleton setup, joint pose does not influence the skeleton. Once rigging is done, the object can be posed by changing joint rotations in the <ahref="../animate_mode">animate</a> mode.</p><h2id="inverse-kinematics"><ahref="#inverse-kinematics"class="anchor-heading"aria-labelledby="inverse-kinematics"><svgviewBox="0 0 16 16"aria-hidden="true"><usexlink:href="#svg-link"></use></svg></a> Inverse Kinematics </h2><p>Instead of computing the positions of the bones from the joint poses (forward kinematics), in inverse kinematics, joint positions are computed from target positions. To associate a target position with a joint, select <codeclass="language-plaintext highlighter-rouge">Add IK</code> and edit the target position. Multiple target positions can be associated with the same joint but targets need to be explicitly enabled using the checkbox.</p><p>In the <ahref="../animate_mode">animate</a> mode, once inverse kinematics is implemented, joint rotation(pose) is updated based on the enabled IK handles.</p><videosrc="/guide/rigging_mode/guide-ik.mp4"controls=""preload=""muted=""loop=""style="max-width: 100%; margin: 0 auto;"></video></div></div><divclass="search-overlay"></div></div></body></html>
