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/******************************************************************************
*
* El'Beem - Free Surface Fluid Simulation with the Lattice Boltzmann Method
* Copyright 2003,2004 Nils Thuerey
*
* Array class definitions
*
*****************************************************************************/
#ifndef ARRAYS_H
#include <string>
#include <sstream>
#include <fstream>
/*****************************************************************************/
/* array handling "cutting off" access along the border */
template<class T>
class ArrayCutoffBc {
public:
//! constructor
ArrayCutoffBc() :
mpVal( NULL ), mElemSize( sizeof(T) ),
mAllocSize(0),
mSizex(0), mSizey(0), mSizez(0)
{ };
//! destructor
virtual ~ArrayCutoffBc() {
if((mpVal)&&(mAllocSize>0)) delete[] mpVal;
mpVal = NULL;
}
//! init sizes
void initializeArray(int setx, int sety, int setz) {
mSizex = setx;
mSizey = sety;
mSizez = setz;
}
//! allocate a new array
inline void allocate() {
int size = mSizex*mSizey*mSizez;
if(size == mAllocSize) return; // dont reallocate
T* newval = new T[size];
for(int i=0;i<size;i++) newval[i] = (T)(0.0);
mpVal = (unsigned char *)newval;
mAllocSize = size;
};
//! set the scalar field pointer
inline void setValuePointer(T *pnt, int elem) { mpVal = (unsigned char *)pnt; mElemSize = elem; };
//! internal array index calculator
inline int arrayIndex(int x, int y, int z) {
if(x<0) x=0;
if(y<0) y=0;
if(z<0) z=0;
if(x>mSizex-1) x=mSizex-1;
if(y>mSizey-1) y=mSizey-1;
if(z>mSizez-1) z=mSizez-1;
return z*mSizex*mSizey + y*mSizex + x;
}
//! phi access function
inline T& getValue(int x, int y, int z) {
unsigned char *bpnt = &mpVal[ arrayIndex(x,y,z)*mElemSize ];
return *((T*)bpnt);
//return mpPhi[ z*mSizex*mSizey + y*mSizex + x];
}
//! return relative offset in direction dir (x=0,y=1,z=2)
inline T& getOffset(T *base,int off, int dir) {
unsigned char *basep = (unsigned char *)base;
int multiplier = 1;
if(dir==1) multiplier=mSizex;
if(dir==2) multiplier=mSizex*mSizey;
// check boundary
unsigned char *bpnt = (basep+ ((off*multiplier)*mElemSize) );
if(bpnt<mpVal) bpnt = basep;
if(bpnt>= (unsigned char *)&getValue(mSizex-1,mSizey-1,mSizez-1) ) bpnt = basep;
return *((T*)bpnt);
}
//! perform trilinear interpolation of array values
inline T interpolateValueAt(LbmFloat x, LbmFloat y, LbmFloat z) {
const LbmFloat gsx=1.0, gsy=1.0, gsz=1.0;
int i= (int)x;
int j= (int)y;
int k= (int)z;
int in = i+1;
int jn = j+1;
int kn = k+1;
if(in>=mSizex) in = mSizex-1;
if(jn>=mSizey) jn = mSizey-1;
if(kn>=mSizez) kn = mSizez-1;
LbmVec mStart(0.0); // TODO remove?
LbmFloat x1 = mStart[0]+ (LbmFloat)(i)*gsx;
LbmFloat x2 = mStart[0]+ (LbmFloat)(in)*gsx;
LbmFloat y1 = mStart[1]+ (LbmFloat)(j)*gsy;
LbmFloat y2 = mStart[1]+ (LbmFloat)(jn)*gsy;
LbmFloat z1 = mStart[2]+ (LbmFloat)(k)*gsz;
LbmFloat z2 = mStart[2]+ (LbmFloat)(kn)*gsz;
if(mSizez==1) {
z1=0.0; z2=1.0;
k = kn = 0;
}
T v1, v2, v3, v4, v5, v6, v7, v8;
v1 = getValue(i ,j ,k );
v2 = getValue(in ,j ,k );
v3 = getValue(i ,jn ,k );
v4 = getValue(in ,jn ,k );
v5 = getValue(i ,j ,kn );
v6 = getValue(in ,j ,kn );
v7 = getValue(i ,jn ,kn );
v8 = getValue(in ,jn ,kn );
T val =
( v1 *(x2-x)* (y2-y)* (z2-z) +
v2 *(x-x1)* (y2-y)* (z2-z) +
v3 *(x2-x)* (y-y1)* (z2-z) +
v4 *(x-x1)* (y-y1)* (z2-z) +
v5 *(x2-x)* (y2-y)* (z-z1) +
v6 *(x-x1)* (y2-y)* (z-z1) +
v7 *(x2-x)* (y-y1)* (z-z1) +
v8 *(x-x1)* (y-y1)* (z-z1)
) * (1.0/(gsx*gsy*gsz)) ;
return val;
}
//! get size of an element
inline int getElementSize(){ return mElemSize; }
//! get array sizes
inline int getSizeX(){ return mSizex; }
inline int getSizeY(){ return mSizey; }
inline int getSizeZ(){ return mSizez; }
//! get array pointer
inline T* getPointer(){ return (T*)mpVal; }
//! testing, gnuplot dump (XY plane for k=Z/2)
void dumpToFile(std::string filebase, int id, int nr) {
std::ostringstream filename;
filename << filebase << "_"<< id <<"_"<< nr <<".dump";
std::ofstream outfile( filename.str().c_str() );
for(int k=mSizez/2; k<=mSizez/2; k++) {
for(int j=0; j<mSizey; j++) {
for(int i=0; i<mSizex; i++) {
outfile <<i<<" "<<j<<" " << getValue(i,j,k)<<" " <<std::endl;
}
outfile << std::endl;
}
}
}
//! testing, grid text dump (XY plane for k=Z/2)
void dumpToGridFile(std::string filebase, int id, int nr) {
std::ostringstream filename;
filename << filebase << "_"<< id <<"_"<< nr <<".dump";
std::ofstream outfile( filename.str().c_str() );
for(int k=mSizez/2; k<=mSizez/2; k++) {
for(int j=0; j<mSizey; j++) {
for(int i=0; i<mSizex; i++) {
outfile <<getValue(i,j,k)<<"\t";
}
outfile << std::endl;
}
}
}
protected:
//! pointer for the value field (unsigned char for adding element size)
unsigned char *mpVal;
//! element offset in array
int mElemSize;
//! store allocated size
int mAllocSize;
//! Sizes of the scal array in each dimension
int mSizex,mSizey,mSizez;
};
/*****************************************************************************/
/* array handling "cutting off" access along the border */
template<class T>
class ArrayPlain {
public:
//! constructor
ArrayPlain() :
mpVal( NULL ), mElemSize( sizeof(T) ),
mAllocSize(0),
mSizex(0), mSizey(0), mSizez(0)
{ };
//! destructor
virtual ~ArrayPlain() {
if((mpVal)&&(mAllocSize>0)) delete[] mpVal;
mpVal = NULL;
}
//! init sizes
void initializeArray(int setx, int sety, int setz) {
mSizex = setx;
mSizey = sety;
mSizez = setz;
}
//! allocate a new array
inline void allocate() {
int size = mSizex*mSizey*mSizez;
if(size == mAllocSize) return; // dont reallocate
T* newval = new T[size];
for(int i=0;i<size;i++) newval[i] = (T)(0.0);
mpVal = (unsigned char *)newval;
mAllocSize = size;
};
//! set the scalar field pointer
inline void setValuePointer(T *pnt, int elem) { mpVal = (unsigned char *)pnt; mElemSize = elem; };
//! phi access function
inline T& getValue(const int x, const int y, const int z) const {
unsigned char *bpnt = &mpVal[ (z*mSizex*mSizey + y*mSizex + x)*mElemSize ];
return *((T*)bpnt);
}
//! return relative offset in direction dir (x=0,y=1,z=2)
inline T& getOffset(T *base,int off, int dir) {
unsigned char *basep = (unsigned char *)base;
int multiplier = 1;
if(dir==1) multiplier=mSizex;
if(dir==2) multiplier=mSizex*mSizey;
// check boundary
unsigned char *bpnt = (basep+ ((off*multiplier)*mElemSize) );
if(bpnt<mpVal) bpnt = basep;
if(bpnt>= (unsigned char *)&getValue(mSizex-1,mSizey-1,mSizez-1) ) bpnt = basep;
return *((T*)bpnt);
}
//! get size of an element
inline int getElementSize(){ return mElemSize; }
//! get array sizes
inline int getSizeX(){ return mSizex; }
inline int getSizeY(){ return mSizey; }
inline int getSizeZ(){ return mSizez; }
//! get array pointer
inline T* getPointer(){ return (T*)mpVal; }
//! testing, gnuplot dump (XY plane for k=Z/2)
void dumpToFile(std::string filebase, int id, int nr) {
std::ostringstream filename;
filename << filebase << "_"<< id <<"_"<< nr <<".dump";
std::ofstream outfile( filename.str().c_str() );
for(int k=mSizez/2; k<=mSizez/2; k++) {
for(int j=0; j<mSizey; j++) {
for(int i=0; i<mSizex; i++) {
outfile <<i<<" "<<j<<" " << getValue(i,j,k)<<" " <<std::endl;
}
outfile << std::endl;
}
}
}
//! testing, grid text dump (XY plane for k=Z/2)
void dumpToGridFile(std::string filebase, int id, int nr) {
std::ostringstream filename;
filename << filebase << "_"<< id <<"_"<< nr <<".dump";
std::ofstream outfile( filename.str().c_str() );
for(int k=mSizez/2; k<=mSizez/2; k++) {
for(int j=0; j<mSizey; j++) {
for(int i=0; i<mSizex; i++) {
outfile <<getValue(i,j,k)<<"\t";
}
outfile << std::endl;
}
}
}
protected:
//! pointer for the value field (unsigned char for adding element size)
unsigned char *mpVal;
//! element offset in array
int mElemSize;
//! store allocated size
int mAllocSize;
//! Sizes of the scal array in each dimension
int mSizex,mSizey,mSizez;
};
#define ARRAYS_H
#endif
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