Rig a rope spanning two objects I am trying to rig a rope so that it spans between two objects. Technically it is a fuel line, regardless I am trying to get it to work with the soft-body physics, primarily because A, it will be affected by gravity, and B, the engine rotates in relation to the body of the vehicle.   



As you can see, I have two bones that I want this fuel line (red line) to span between.
I have been trying to use a bezier curve with soft-body enabled, but it only connects to one bone and flops around on the floor like a fish at the other end.(Why does it flop around if no forces are acting on it?)

Thank you for any assistance.
One way to do this is to use Constraints and a mesh:

Instead of a curve, use a mesh object made up of two vertices:


Subdivide it with loopcuts (CtrlL) or W&gt; Subdivide.

Hook each end vertex to the corresponding object (or bone) with CtrlH:


Assign a Vertex Group to the end vertices.

Make the line object a Soft Body object and set the vertex group to the end vertices group:


Add a Skin modifier to the line object, and use Vertex scale (CtrlA in edit mode) to scale the size of the hose.

Add a Subsurf or Bevel modifier afterwards to round the hose out.