diusOuter: .5;
                            segmentsTheta: 50"></a-mixin>
        <a-mixin id="sphere"
                  geometry="primitive: sphere; radius: .1"></a-mixin>
        <a-mixin id="torus"
                  geometry="primitive: torus; arc: 720; radius: .3; radiusTubular: .05;
                            segmentsTubular: 10;"></a-mixin>
        <a-mixin id="torus-knot"
                  geometry="primitive: torusKnot; p: 3; q: 7; radius: .25;
                            segmentsRadial: 10; radiusT