.. _program_listing_file_SPlisHSPlasH_PBF_TimeIntegration.h:

Program Listing for File TimeIntegration.h
==========================================

|exhale_lsh| :ref:`Return to documentation for file <file_SPlisHSPlasH_PBF_TimeIntegration.h>` (``SPlisHSPlasH/PBF/TimeIntegration.h``)

.. |exhale_lsh| unicode:: U+021B0 .. UPWARDS ARROW WITH TIP LEFTWARDS

.. code-block:: cpp

   #ifndef TIMEINTEGRATION_H
   #define TIMEINTEGRATION_H
   
   #include "SPlisHSPlasH/Common.h"
   
   // ------------------------------------------------------------------------------------
   namespace SPH
   {
       class TimeIntegration
       {
       public: 
           static void semiImplicitEuler(
               const Real h,
               const Real mass,
               Vector3r &position,
               Vector3r &velocity,
               const Vector3r &acceleration);
   
   
           // -------------- velocity update (first order) -----------------------------------------------------
           static void velocityUpdateFirstOrder(
               const Real h,
               const Real mass,
               const Vector3r &position,               // position after constraint projection at time t+h
               const Vector3r &oldPosition,                // position before constraint projection at time t
               Vector3r &velocity);
   
           // -------------- velocity update (second order) -----------------------------------------------------
           static void velocityUpdateSecondOrder(
               const Real h,
               const Real mass,
               const Vector3r &position,               // position after constraint projection at time t+h
               const Vector3r &oldPosition,                // position before constraint projection at time t
               const Vector3r &positionOfLastStep,     // position of last simulation step at time t-h
               Vector3r &velocity);
   
       };
   }
   
   #endif