Unity 施加在刚性体的(ForceMode)四种作用力
ForceMode为枚举类型，用来控制力的作用方式:// // 摘要: // Use ForceMode to specify how to apply a force using Rigidbody.AddForce. public enum ForceMode { // // 摘要: // Add a continuous force to the rigidbody, using its mass.
