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//////////////////////////////////////////////////////////////////////
// This file is part of Wavelet Turbulence.
//
// Wavelet Turbulence is free software: you can redistribute it and/or modify
// it under the terms of the GNU General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// Wavelet Turbulence is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with Wavelet Turbulence. If not, see <http://www.gnu.org/licenses/>.
//
// Copyright 2008 Theodore Kim and Nils Thuerey
//
// FLUID_3D.h: interface for the FLUID_3D class.
//
//////////////////////////////////////////////////////////////////////
#ifndef FLUID_3D_H
#define FLUID_3D_H
#include <cstdlib>
#include <cmath>
#include <iostream>
#include "OBSTACLE.h"
// #include "WTURBULENCE.h"
#include "VEC3.h"
using namespace std;
using namespace BasicVector;
class WTURBULENCE;
class FLUID_3D
{
public:
FLUID_3D(int *res, /* int amplify, */ float *p0, float dt);
FLUID_3D() {};
virtual ~FLUID_3D();
void initBlenderRNA(float *alpha, float *beta);
// create & allocate vector noise advection
void initVectorNoise(int amplify);
void addSmokeColumn();
static void addSmokeTestCase(float* field, Vec3Int res);
void step();
void addObstacle(OBSTACLE* obstacle);
const float* xVelocity() { return _xVelocity; };
const float* yVelocity() { return _yVelocity; };
const float* zVelocity() { return _zVelocity; };
int xRes() const { return _xRes; };
int yRes() const { return _yRes; };
int zRes() const { return _zRes; };
public:
// dimensions
int _xRes, _yRes, _zRes, _maxRes;
Vec3Int _res;
size_t _totalCells;
int _slabSize;
float _dx;
float _p0[3];
float _p1[3];
float _totalTime;
int _totalSteps;
int _totalImgDumps;
int _totalVelDumps;
void artificialDamping(float* field);
// fields
float* _density;
float* _densityOld;
float* _heat;
float* _heatOld;
float* _xVelocity;
float* _yVelocity;
float* _zVelocity;
float* _xVelocityOld;
float* _yVelocityOld;
float* _zVelocityOld;
float* _xForce;
float* _yForce;
float* _zForce;
unsigned char* _obstacles;
// CG fields
int _iterations;
// simulation constants
float _dt;
float _vorticityEps;
float _heatDiffusion;
float *_alpha; // for the buoyancy density term <-- as pointer to get blender RNA in here
float *_beta; // was _buoyancy <-- as pointer to get blender RNA in here
float _tempAmb; /* ambient temperature */
// WTURBULENCE object, if active
// WTURBULENCE* _wTurbulence;
// boundary setting functions
void copyBorderAll(float* field);
// timestepping functions
void wipeBoundaries();
void addForce();
void addVorticity();
void addBuoyancy(float *heat, float *density);
// solver stuff
void project();
void diffuseHeat();
void solvePressure(float* field, float* b, unsigned char* skip);
void solvePressurePre(float* field, float* b, unsigned char* skip);
void solveHeat(float* field, float* b, unsigned char* skip);
// handle obstacle boundaries
void setObstacleBoundaries(float *_pressure);
void setObstaclePressure(float *_pressure);
public:
// advection, accessed e.g. by WTURBULENCE class
void advectMacCormack();
// boundary setting functions
static void copyBorderX(float* field, Vec3Int res);
static void copyBorderY(float* field, Vec3Int res);
static void copyBorderZ(float* field, Vec3Int res);
static void setNeumannX(float* field, Vec3Int res);
static void setNeumannY(float* field, Vec3Int res);
static void setNeumannZ(float* field, Vec3Int res);
static void setZeroX(float* field, Vec3Int res);
static void setZeroY(float* field, Vec3Int res);
static void setZeroZ(float* field, Vec3Int res);
static void setZeroBorder(float* field, Vec3Int res) {
setZeroX(field, res);
setZeroY(field, res);
setZeroZ(field, res);
};
// static advection functions, also used by WTURBULENCE
static void advectFieldSemiLagrange(const float dt, const float* velx, const float* vely, const float* velz,
float* oldField, float* newField, Vec3Int res);
static void advectFieldMacCormack(const float dt, const float* xVelocity, const float* yVelocity, const float* zVelocity,
float* oldField, float* newField, float* temp1, float* temp2, Vec3Int res, const unsigned char* obstacles);
// maccormack helper functions
static void clampExtrema(const float dt, const float* xVelocity, const float* yVelocity, const float* zVelocity,
float* oldField, float* newField, Vec3Int res);
static void clampOutsideRays(const float dt, const float* xVelocity, const float* yVelocity, const float* zVelocity,
float* oldField, float* newField, Vec3Int res, const unsigned char* obstacles, const float *oldAdvection);
// output helper functions
// static void writeImageSliceXY(const float *field, Vec3Int res, int slice, string prefix, int picCnt, float scale=1.);
// static void writeImageSliceYZ(const float *field, Vec3Int res, int slice, string prefix, int picCnt, float scale=1.);
// static void writeImageSliceXZ(const float *field, Vec3Int res, int slice, string prefix, int picCnt, float scale=1.);
// static void writeProjectedIntern(const float *field, Vec3Int res, int dir1, int dir2, string prefix, int picCnt, float scale=1.);
};
#endif
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