Flexible rope simulation method

Abstract

The invention discloses a flexible rope simulation method which includes the following steps: step1, making a 3D (three dimensional) rope model; step2, loading a 3D model file made in step1 in a simulated engine scene and creating rope section entity; step3, creating a node for the corresponding rope section entity; step4, setting the space coordinates, the magnifying ratio and the rotation angle parameter of the rope section entity; step5, sequentially creating other rope section entities; step6, sequentially creating simulated bodies, called rope section bodies, with physical attributes for each rope section entity created in step5; step7, setting the physical attributes of the rope section bodies created in step6; step8, creating a collision box for each rope section entity; step9, creating joints among the simulated rope sections; step10, setting the space coordinates and the attributes of the joints; step11, adding expansion control to each rope section entity; and step12, finally forming a flexible simulated rope.

Description

technical field [0001] The invention relates to a method for simulating a rope, in particular to a method for simulating a flexible rope. Background technique [0002] The simulation of flexible rope is one of the difficulties in computer simulation research. The dynamic behavior of the rope is very complex. In the past, the simulation has been realized by the behavior script artificially set by the programmer. The disadvantage of this method is the fidelity of the rope simulation. Not enough, the code is complicated, and the program portability is poor: [0003] 1. Insufficient fidelity is manifested in the fact that the artificially set behavior script cannot fully cover the motion characteristics of the rope, and the movement and collision of the rope in the simulation system are unpredictable, which makes it more difficult to write behavior scripts. In addition, there are behavior scripts written based on dynamic formulas, which are too theoretical and the scenarios are...

AI Technical Summary

Problems solved by technology

[0002] The simulation of flexible rope is one of the difficulties in computer simulation research. The dynamic behavior of the rope is very complex. In the past, the simulation has been realized by the behavior script artificially set by the programmer. The disadvantage of this method is the fidelity of the rope simulation. Not enough, the code is complicated, and the program portability is poor:

[0003] 1. Insufficient fidelity is manifested in the fact that the artificially set behavior script cannot fully cover the motion characteristics of the rope, and the movement and collision of the rope in the simulation system are unpredictable, which makes it more difficult to write behavior scripts

In addition, there are behavior scripts written based on dynamic formulas, which are too theoretical and the scenarios are too idealized, especially the motion of the rope is nonlinear motion, and the force constraint between the ropes is variable force (there is no ready-made Physics formulas can be used), so that the behavior script written is more difficult to be realistic

[0004] 2. The complexity of the code is reflected in the fact that the dynamic behavior of the rope is executed by limited behavior scripts, and the writing of behavior scripts is a complicated process. It needs to consider a lot of situations to make judgments one by one and execute different behaviors. The complexity of force and motion determines the complexity of behavior script code writing

[0005] 3. The portability of the program is poor. The behavior script written is only for the special scene in the simulation environment. The force and motion of the rope are artificially set in advance, and it cannot handle the situation that the programmer did not think of ( There are many bugs in the system, and it is not easy to find), in the new scene, the behavior script of the rope needs to be rewritten, and the program is not universal

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