CS838_28_Sep_2011

Wiremasswirerestlength mass and forint s1swirecurve

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Unformatted text preview: ION_LAYOUT { public: typedef VECTOR<T,3> TV; template<class T> void SIMULATION_LAYOUT<T>::Add_Elastic_Forces(const ARRAY_VIEW<TV>& X,ARRAY<TV>& force) const STREAM_TYPE stream_type; { for(int s=1;s<=wire_curve->mesh.elements.m;s++){ const int n; // Number of particles in wire mesh int p1,p2;wire_curve->mesh.elements(s).Get(p1,p2); const T youngs_modulus,damping_coefficient // Elasticity and damping coefficients const T wire_mass,wire_restlength; TV X1=X(p1),X2=X(p2); // Mass and length for entire wire ARRAY<T> mass,restlength; TV normal=(X1-X2).Normalized();// Mass (per each particle), restlength (per each spring) T length=(X1-X2).Magnitude(); GEOMETRY_PARTICLES<TV> particles; TV f=-normal*youngs_modulus*(length/restlength(s)-1.); DEFORMABLE_GEOMETRY_COLLECTION<TV> collection; force(p1)+=f;force(p2)-=f; } const int number_of_frames; // Total number of frames } const T frame_time; const T CFL_number; ￿ // Frame (snapshot) interval // CFL number (not to exceed 1) SEGMENTED_CURVE<TV>* wire_curve; FREE_PARTICLES<TV>* wire_particles; f1 = −k l −1 l0 ￿ x1 − x2 ￿x 1 − x 2￿ SIMULATION_LAYOUT(const STREAM_TYPE stream_type_input); void Initialize(); void Add_Elastic_Forces(const ARRAY_VIEW<TV>& X,ARRAY<TV>& force); void Add_Damping_Forces(const ARRAY_VIEW<TV>& X,const ARRAY_VIEW<TV>& V, ARRAY<TV>& force); void Add_External_Forces(ARRAY<TV>& force); T Maximum_Dt(); void Write_Output(const int frame); void Set_Kinematic_Positions(const T time,ARRAY_VIEW<TV>& X); void Set_Kinematic_Velocities(const T time,ARRAY_VIEW<TV>& V); void Clear_Values_Of_Kinematic_Particles(ARRAY<TV>& array); }; } CS838 Advanced Modeling and Simulation namespace PhysBAM{ template<class T> class SIMULATION_LAYOUT { public: typedef VECTOR<T,3> TV; const STREAM_TYPE template<class T> stream_type; void SIMULATION_LAYOUT<T>::Add_Damping_Forces(const ARRAY_VIEW<TV>& X,const ARRAY_VIEW<TV>& V, const int n; force) // Number of particles in wire mesh ARRAY<TV>& { const T youngs_modulus,damping_coefficient // Elasticity and damping coefficients const T wire_mass,wire_restlength; // Mass and for(int s=1;s<=wire_curve->mesh.elements.m;s++){ length for entire wire ARRAY<T>nt p1,p2;wire_curve->mesh.elements(s).Get(p1,p2); particle), restlength (per each spring) // Mass (per each i mass,restlength; TV X1=X(p1),X2=X(p2); GEOMETRY_PARTICLES<TV> particles; TV V1=V(p1),V2=V(p2); DEFORMABLE_GEOMETRY_COLLECTION<TV> collection; TV normal=(X1-X2).Normalized(); T vrel=TV::Dot_Product(normal,V1-V2); const int number_of_frames; // Total number of frames const TTV f=-damping_coefficient*vrel*normal; interval frame_time; // Frame (snapshot) force(p1)+=f;force(p2)-=f; number (not to exceed 1) const T CFL_number; // CFL } } SEGMENTED_CURVE<TV>* wire_curve; FREE_PARTICLES<TV>* wire_particles; SIMULATION_LAYOUT(const STREAM_TYPE stream_type_input); void Initialize(); void Add_Elastic_Forces(const ARRAY_VIEW<TV>& X,ARRAY<TV>& force); void Add_Damping_Forces(const ARRAY_VIEW<TV>& X,const ARRAY_VIEW<TV>& V, ARRAY<TV>& force); void Add_External_Forces(ARRAY<TV>& force); T Maximum_Dt(); void Write_Output(const int frame); void Set_Kinematic_Positions(const T time,ARRAY_VIEW<...
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This note was uploaded on 09/04/2012 for the course CS 838 taught by Professor Staff during the Fall '08 term at University of Wisconsin Colleges Online.

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