IMAGE FORMING SYSTEM, PROGRAM AND INFORMATION STORAGE MEDIUM

摘要

PROBLEM TO BE SOLVED: To provide an image forming system, a program, and an information storage medium for changing a primitive image without making the changing process and the state after a change monotonous. SOLUTION: When an object before deformation in a frame n is deformed to an object after deformation in a frame (n+m), flow field information HFIn to HFIn+m equivalent to a continuous (m+1) frame is used. The flow field information HFIn to HFIn+m are determined by external cause-imparted fluid simulation by using a Navier-Stokes equation. The flow field information in the respective frames is successively applied on the object WOBJ before deformation in the frame n, and the object is deformed by changing a position of respective constitution points of the object according to the direction and the size of a speed vector set to respective lattice points. When applying the flow field information of a process of returning to the state before deformation from the state after deformation in inverse order, the deformation having viscosity inherent in fluid can be performed.