Animating a virtual object within a virtual world

A computer system comprising:

• a processor;
• a memory device holding an instruction set executable on the processor to cause the computer system to perform operations comprising:
• wherein a virtual object in a virtual world comprises a plurality of object parts;
• specifying a target frame of reference in the virtual world for a first object part having an elastic connection to a control frame of reference for the first object part;
• wherein the control frame of reference comprises a current position and a current orientation for the first object part;
• and
• wherein the target frame of reference comprises a target position and a target orientation for the first object part;
• wherein a respective additional control frame of reference exists concurrently with the control frame of reference for each of the one or more second object parts as having a rigid connection to the target frame of reference;
• concurrently applying a first control and a second control, the first control applied in isolation to the first object part in accordance with a resiliency of the elastic connection to move the first object part towards an updated target frame of reference;
• wherein an updated target position of the updated target frame of reference represents a first reduction of a difference between the current position and the target position;
• wherein an updated target orientation of the updated target frame of reference represents a second reduction of a difference between the current orientation and the target orientation;
• and
• based on applying the second control in isolation to a particular object part of the one or more second object parts:
• establishing the rigid connection that exists between the particular object part and the target frame of reference as existing between the particular object part and the updated target frame of reference, which comprises:
• establishing a rigid connection between the additional control frame of reference for the particular object part and the updated target frame of reference.

A non-transitory storage medium storing a computer program which, when executed by a computer, carries out a method of animating a virtual object within a virtual world, wherein the virtual object comprises a plurality of object parts, wherein for a first object part there is one or more associated second object parts, the method comprising:

• specifying a target frame of reference in the virtual world for a first object part having an elastic connection to a control frame of reference for the first object part;
• wherein the control frame of reference comprises a current position and a current orientation for the first object part;
• and
• wherein the target frame of reference comprises a target position and a target orientation for the first object part;
• wherein a respective additional control frame of reference exists concurrently with the control frame of reference for each of the one or more second object parts as having a rigid connection to the target frame of reference;
• concurrently applying a first control and a second control, the first control applied in isolation to the first object part in accordance with a resiliency of the elastic connection to move the first object part towards an updated target frame of reference;
• wherein an updated target position of the updated target frame of reference represents a first reduction of a difference between the current position and the target position;
• wherein an updated target orientation of the updated target frame of reference represents a second reduction of a difference between the current orientation and the target orientation;
• and
• based on applying the second control in isolation to a particular object part of the one or more second object parts:
• establishing the rigid connection that exists between the particular object part and the target frame of reference as existing between the particular object part and the updated target frame of reference, which comprises:
• establishing a rigid connection between the additional control frame of reference for the particular object part and the updated target frame of reference.