This study proposes a low-dimensional physical model for quadruped motion generation to address the difficulty in capturing quadruped motions. The proposed model provides an efficient and convenient method for creating and reconstructing quadruped animation. Low-dimensional physical solvers based on particles

rigid bodies

and springs are created. The quadruped skeleton is mapped to a low-dimensional physical structure

and legs

torso

head

and tail are abstracted to distinctive models. The particles of the entire structure are solved from feet to top by gait constraints

which are set up according to the gait pattern and foot trajectories. After correcting physical simulation results with universal constraints

full body skeleton animation is generated

and all nodes are back calculated from the low-dimensional structure. The experimental results with different gaits

shapes

and styles demonstrate that the proposed method can stably run at 330 frames per second with good visual effect and versatility. The input of the proposed method is easy to learn and obtain for common users. The calculation process is stable and in real time

and a multi-style quadruped animation that satisfies visual realism can be generated.