Geodesics are used widely in computer graphics and other field. MMP is a sophisticated method while geodesics are calculated on triangular meshes. We achieved a precision geodesics algorithm based on MMP

and modified the error which occurred when adopting the Vitaly Surazhsky’s method. At the window propagating

lamp-house-radial method was used instead of using an approximate type. In dealing with window intersection

the complex and multiplex sorts were treated with layered enumerate type. A clear and comprehensible algorithm used in backtracing. At last

the result was presented

the run time is little more than Vitaly Surazhsky’s to some exerd

but the proposed method is precise.