After binding the wheels and steering wheel last time, I have created a controller and bound it to the model, after locating all the parts that can move according to the client’s video.
The first step in locating the part as a whole is to look at the axes, which include rotation and displacement. This involves finding the tangent line on the surface of the part.
Generally I will choose a central point to attach the locator to or a point on the surface and then rotate it to find the direction of the tangent line.
This is done so that the axis of the controller is oriented in line with the object.
Similarly here the spacer would need to be rotated with the steel cannon at its centre then the direction of the axis of its centre point is the direction of the centre point of the cannon and then the Locator is moved to the surface of the spacer.
The size of the locator can be adjusted here.
Note here that the locator must not be named the same as the polygon, otherwise it cannot be mirrored.
Once the locator has been created, it needs to be mirrored.
Select a group of locators to copy, then two groups will appear with the same name. Then change the names from L to R. Click on all the locators on one side and click on Mirror.
Then click on create skeleton.（set_ctl)
The shape of the controller is then edited, usually to match the shape of the part.
Once edited, you can choose to change the controller shape and scale it.
The created skeleton will still need to be mirrored. This step is important.
Then mirror the shape of the controller left and right.
Finally the large controller needs to be created and the outline view collated.