RenderableManager is responsible for rendering the "skinned" flexes
which represent the correct "final" look of a flex. This now includes
1D flexes which are rendered as a sequence of capsules (similar to
tendons).
SceneDecorator is responsible for rendering the debug (unskinned)
versions of flexes. This includes the vertices (small spheres for each
vertex), edges (thin cynlinders for each edge), and faces (triangles
for each face, including sublayers).
PiperOrigin-RevId: 951595046
Change-Id: Iebc6fd7a747a602813b6457333bd9fa5915e28d3
Similar to LightManager, the RenderableManager manages
renderables based on an mjModel and its mjData.
PiperOrigin-RevId: 941510745
Change-Id: I97b44cc857f136aa7c90ceb85a42e299fc759b73
Haroon Qureshi