GPGPU Programming for Games and Science

406 GPGPU Programming for Games and Science

mInitializeState . reset(

ShaderFactory ::CreateCompute(”InitializeState . hlsl”, definer ));

mInitializeState−>Set (” density ” , mDensity ) ;

mInitializeState−>Set (” v el oc i ty ” , mVelocity );

mInitializeState−>S et ( ” stateTm1 ” , mStateTm1 ) ;

mInitializeState−>Set(”stateT” , mStateT );

// From InitializeSta te . cpp ( in a wrapper for execution ):

engine−>Execu te ( m I n i t i a l i z e S t a t e , mNumXGrou ps , mNumYGroups , 1 ) ;

LISTING 7.27: Initial state computations 2D fluids, both for the CPU and

the GPU.

7.11.2.2 Initialization of External Forces

The external density control in Equation (7.52) ...