int CSimulateVariableWind::CalculateFireSpreading(double fTimeLimit){
int x,y;
int x2,y2;
int i,j;
bool bReturn = false;
/* neighbor's address*/ /* N NE E SE S SW W NW */
static int nX[8] = { 0, 1, 1, 1, 0, -1, -1, -1};
static int nY[8] = { 1, 1, 0, -1, -1, -1, 0, 1};
double fDist; /* distance to neighbor */
double fAz; /* compass azimuth to neighbor (0=N) */
size_t modelNumber; /* fuel model number at current cell */
double moisture[6]; /* fuel moisture content at current cell */
double dSpreadRate; /* spread rate in direction of neighbor */
double dSpreadTime; /* time to spread from cell to neighbor */
double dIgnTime; /* time neighbor is ignited by current cell */
double dWindSpd;
double dWindDir;
int iBurntCells = 0;
while (m_CentralPoints.Get_Count()!=0){
for (int iPt=0; iPt<m_CentralPoints.Get_Count();iPt++){
x = m_CentralPoints.Get_X(iPt);
y = m_CentralPoints.Get_Y(iPt);
if (!m_pDEM->is_NoData(x,y) && !m_pFuelGrid->is_NoData(x,y)){
modelNumber = (size_t) m_pFuelGrid->asInt(x, y);
moisture[0] = m_pM1Grid->asDouble(x, y) / 100.;
moisture[1] = m_pM10Grid->asDouble(x, y) / 100.;
moisture[2] = m_pM100Grid->asDouble(x, y) / 100.;
moisture[3] = m_pM100Grid->asDouble(x, y) / 100.;
moisture[4] = m_pMHerbGrid->asDouble(x, y) / 100.;
moisture[5] = m_pMWoodGrid->asDouble(x, y) / 100.;
dWindSpd = getWindSpeed(x, y, m_pTimeGrid->asDouble(x,y)) * KMH2FTMIN;
dWindDir = 360. - getWindDirection(x, y, m_pTimeGrid->asDouble(x,y));
Fire_SpreadNoWindNoSlope(m_Catalog, modelNumber, moisture);
Fire_SpreadWindSlopeMax(m_Catalog, modelNumber, dWindSpd,
dWindDir, tan(m_pSlopeGrid->asDouble(x,y)),
m_pAspectGrid->asDouble(x,y));
for (i = -2; i < 3 ; i++){
for (j = -2; j < 3; j++){
if (i!= 0 || j!=0){
x2 = x + i;
y2 = y + j;
if (m_pTimeGrid->is_InGrid(x2,y2,false)){
fAz = getAzimuth(i,j);
Fire_SpreadAtAzimuth(m_Catalog, modelNumber, fAz, FIRE_BYRAMS);
dSpreadRate = Fuel_SpreadAny(m_Catalog, modelNumber); // in ft/min (awkward...)
dSpreadRate *= FTMIN2MMIN; //a bit better...
if (dSpreadRate > Smidgen){
fDist = sqrt(pow(i,2.) + pow(j,2.)) * m_pTimeGrid->Get_Cellsize();
dSpreadTime = fDist / dSpreadRate;
dIgnTime = m_pTimeGrid->asDouble(x,y) + dSpreadTime;
if (dIgnTime < fTimeLimit){
if (m_pTimeGrid->asDouble(x2,y2) == 0.0
|| m_pTimeGrid->asDouble(x2, y2)>dIgnTime){
m_pTimeGrid->Set_Value(x2, y2, dIgnTime);
m_AdjPoints.Add(x2,y2);
Fire_FlameScorch(m_Catalog, modelNumber, FIRE_FLAME);
m_pFlameGrid->Set_Value(x2, y2, Fuel_FlameLength(m_Catalog, modelNumber) * FT2M);
m_pIntensityGrid->Set_Value(x2, y2, Fuel_ByramsIntensity(m_Catalog, modelNumber)
* BTU2KCAL / FT2M );
m_pReactionIntensityGrid->Set_Value(x2, y2, Fuel_RxIntensity(m_Catalog, modelNumber));
m_pHeatPerUnitAreaGrid->Set_Value(x2, y2, Fuel_HeatPerUnitArea(m_Catalog, modelNumber));
m_pEffectiveWindGrid->Set_Value(x2,y2, Fuel_EffectiveWind(m_Catalog, modelNumber));
}//if
}//if
}//if
}//if
}//if
}//for
}//for
}//if
}//for
m_CentralPoints.Clear();
for (int i=0; i<m_AdjPoints.Get_Count(); i++){
x= m_AdjPoints.Get_X(i);
y = m_AdjPoints.Get_Y(i);
m_CentralPoints.Add(x, y);
iBurntCells++;
}//for
m_AdjPoints.Clear();
if (fTimeLimit == NO_TIME_LIMIT){
Process_Get_Okay(true);
}//if
}//while
return iBurntCells;
}//method
int CSimulate::CalculateFireSpreading(float fTimeLimit){
int x,y;
int x2,y2;
int n;
bool bReturn = false;
/* neighbor's address*/ /* N NE E SE S SW W NW */
static int nX[8] = { 0, 1, 1, 1, 0, -1, -1, -1};
static int nY[8] = { 1, 1, 0, -1, -1, -1, 0, 1};
double nDist[8]; /* distance to each neighbor */
double nAzm[8]; /* compass azimuth to each neighbor (0=N) */
size_t modelNumber; /* fuel model number at current cell */
double moisture[6]; /* fuel moisture content at current cell */
double dSpreadRate; /* spread rate in direction of neighbor */
double dSpreadTime; /* time to spread from cell to neighbor */
double dIgnTime; /* time neighbor is ignited by current cell */
double dWindSpd;
int iBurntCells = 0;
bool bUpdate = Parameters("UPDATEVIEW")->asBool();
for (n=0; n<8; n++){
nDist[n] = sqrt ( nX[n] * m_pDEM->Get_Cellsize() * nX[n] * m_pDEM->Get_Cellsize()
+ nY[n] * m_pDEM->Get_Cellsize() * nY[n] * m_pDEM->Get_Cellsize() );
nAzm[n] = n * 45.;
}//for
while (m_CentralPoints.Get_Count()!=0){
for (int iPt=0; iPt<m_CentralPoints.Get_Count();iPt++){
x = m_CentralPoints.Get_X(iPt);
y = m_CentralPoints.Get_Y(iPt);
if (!m_pDEM->is_NoData(x,y) && !m_pFuelGrid->is_NoData(x,y)){
modelNumber = (size_t) m_pFuelGrid->asInt(x, y);
moisture[0] = m_pM1Grid->asFloat(x, y);
moisture[1] = m_pM10Grid->asFloat(x, y);
moisture[2] = m_pM100Grid->asFloat(x, y);
moisture[3] = m_pM100Grid->asFloat(x, y);
moisture[4] = m_pMHerbGrid->asFloat(x, y);;
moisture[5] = m_pMWoodGrid->asFloat(x, y);
dWindSpd = m_pWindSpdGrid->asFloat(x,y) * MS2FTMIN;
Fire_SpreadNoWindNoSlope(m_Catalog, modelNumber, moisture);
Fire_SpreadWindSlopeMax(m_Catalog, modelNumber, dWindSpd,
m_pWindDirGrid->asFloat(x,y), tan(m_pSlopeGrid->asFloat(x,y)),
m_pAspectGrid->asFloat(x,y));
for (n=0; n<8; n++){
x2 = x + nX[n];
y2 = y + nY[n];
if (m_pTimeGrid->is_InGrid(x2,y2,false)){
Fire_SpreadAtAzimuth(m_Catalog, modelNumber, nAzm[n], FIRE_BYRAMS);
dSpreadRate = Fuel_SpreadAny(m_Catalog, modelNumber); // in ft/min (awkward...)
dSpreadRate *= FTMIN2MMIN; //a bit better...
if (dSpreadRate > Smidgen){
dSpreadTime = nDist[n] / dSpreadRate;
if (fTimeLimit == NO_TIME_LIMIT){
dIgnTime = m_pTimeGrid->asDouble(x,y) + dSpreadTime;
if (m_pTimeGrid->asDouble(x2,y2) == 0.0
|| m_pTimeGrid->asDouble(x2, y2) > dIgnTime + THRESHOLD_FOR_DIFFERENCE ){
m_pTimeGrid->Set_Value(x2, y2, dIgnTime);
m_AdjPoints.Add(x2,y2);
Fire_FlameScorch(m_Catalog, modelNumber, FIRE_FLAME);
m_pFlameGrid->Set_Value(x2, y2, Fuel_FlameLength(m_Catalog, modelNumber) * FT2M);
m_pIntensityGrid->Set_Value(x2, y2, Fuel_ByramsIntensity(m_Catalog, modelNumber)
* BTU2KCAL / FT2M );
}//if
}//if
}//if
}//if
}//for
}//if
}//for
m_CentralPoints.Clear();
for (int i=0; i<m_AdjPoints.Get_Count(); i++){
x= m_AdjPoints.Get_X(i);
y = m_AdjPoints.Get_Y(i);
m_CentralPoints.Add(x, y);
}//for
m_AdjPoints.Clear();
if (fTimeLimit == NO_TIME_LIMIT){
Process_Get_Okay(true);
}//if
if (bUpdate){
DataObject_Update(m_pTimeGrid, true);
}
}//while
return iBurntCells;
}//method
int main ( int argc, char *argv[] )
{
Rows = atoi(argv[1]);
Cols = atoi(argv[1]);
CellWd = 3.2808399*3000/Cols; /* Cell width (E-W) in feet. */ //1 m = 3.2808 ft
CellHt = 3.2808399*3000/Cols; /* Cell height (N-S) in feet. */ //1 m = 3.2808 ft
/* NOTE 2: Change these to set uniform burning conditions. */
size_t Model = 1; /* NFFL 1 */
double WindSpd = atof(argv[2]); /* m/s */
double WindDir = atof(argv[3]); /* degrees clockwise from north */
double M1 = atof(argv[4]); /* 1-hr dead fuel moisture */
double M10 = 0; /* 10-hr dead fuel moisture */
double M100 = 0; /* 100-hr dead fuel moisture */
double Mherb = 0; /* Live herbaceous fuel moisture */
double Mwood = 0; /* Live woody fuel moisture */
double slp_tmp, asp_tmp; //slope and aspect temporary values
char buffer[100]; //buffer when usedm fgets skips lines
/* neighbor's address*/ //N NE E SE S SW W NW a b c d e f g h
static int nCol[16] = { 0, 1, 1, 1, 0, -1, -1, -1, -1, 1, -2, 2, -2, 2, -1, 1};
static int nRow[16] = { -1, -1, 0, 1, 1, 1, 0, -1, -2, -2, -1, -1, 1, 1, 2, 2};
static int nTimes = 0; /* counter for number of time steps */
FuelCatalogPtr catalog; /* fuel catalog handle */
double nDist[16]; /* distance to each neighbor */
double nAzm[16]; /* compass azimuth to each neighbor (0=N) */
double timeNow; /* current time (minutes) */
double timeNext; /* time of next cell ignition (minutes) */
int row, col, cell; /* row, col, and index of current cell */
int nrow, ncol, ncell; /* row, col, and index of neighbor cell */
int n, cells; /* neighbor index, total number of map cells */
size_t modelNumber; /* fuel model number at current cell */
double moisture[6]; /* fuel moisture content at current cell */
double fpm; /* spread rate in direction of neighbor */
double minutes; /* time to spread from cell to neighbor */
double ignTime; /* time neighbor is ignited by current cell */
int atEdge; /* flag indicating fire has reached edge */
size_t *fuelMap; /* ptr to fuel model map */
double *ignMap; /* ptr to ignition time map (minutes) */
double *flMap; /* ptr to flame length map (feet) */
double *slpMap; /* ptr to slope map (rise/reach) */
double *aspMap; /* ptr to aspect map (degrees from north) */
double *wspdMap; /* ptr to wind speed map (ft/min) */
double *wdirMap; /* ptr to wind direction map (deg from north) */
double *m1Map; /* ptr to 1-hr dead fuel moisture map */
double *m10Map; /* ptr to 10-hr dead fuel moisture map */
double *m100Map; /* ptr to 100-hr dead fuel moisture map */
double *mherbMap; /* ptr to live herbaceous fuel moisture map */
double *mwoodMap; /* ptr to live stem fuel moisture map */
FILE *slope_file, *aspect_file;
printf("Running fireSim with Rows:%d, U:%lf, Dir:%lf\n", Rows, WindSpd, WindDir);
/* NOTE 3: allocate all the maps. */
cells = Rows * Cols;
if ( (ignMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (flMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (slpMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (aspMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (wspdMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (wdirMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (m1Map = (double *) calloc(cells, sizeof(double))) == NULL
|| (m10Map = (double *) calloc(cells, sizeof(double))) == NULL
|| (m100Map = (double *) calloc(cells, sizeof(double))) == NULL
|| (mherbMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (mwoodMap = (double *) calloc(cells, sizeof(double))) == NULL
|| (fuelMap = (size_t *) calloc(cells, sizeof(size_t))) == NULL )
{
fprintf(stderr, "Unable to allocate maps with %d cols and %d rows.\n",
Cols, Rows);
return (1);
}
/* NOTE 4: initialize all the maps -- modify them as you please. */
if ( (slope_file = fopen(argv[5],"r")) == NULL ){
printf("Unable to open output map \"%s\".\n", argv[5]);
return (FIRE_STATUS_ERROR);
}
if ( (aspect_file = fopen(argv[6],"r")) == NULL ){
printf("Unable to open output map \"%s\".\n", argv[6]);
return (FIRE_STATUS_ERROR);
}
/*for (n = 0; n < 6; n++){
fgets(buffer, 100, slope_file);
fgets(buffer, 100, aspect_file);
}
*/
for ( cell=0; cell<cells; cell++ )
{
fscanf(aspect_file, "%lf", &asp_tmp);
fscanf(slope_file, "%lf", &slp_tmp);
slpMap[cell] = slp_tmp/100;
//Slope in firelib is a fraction
asp_tmp = (asp_tmp - 90 < 0) ? //while in Grass is percentage rise/reach.
asp_tmp - 90 + 360 : asp_tmp - 90 ; //Aspect in firelib is N=0 and clockwise
aspMap[cell] = 360 - asp_tmp; //while aspect in Grass is E=0 counter-clockwise
fuelMap[cell] = Model;
wspdMap[cell] = 196.850393701 * WindSpd; /* convert m/s into ft/min */
wdirMap[cell] = WindDir;
m1Map[cell] = M1;
m10Map[cell] = M10;
m100Map[cell] = M100;
mherbMap[cell] = Mherb;
mwoodMap[cell] = Mwood;
ignMap[cell] = INFINITY;
flMap[cell] = 0.;
}
/* NOTE 5: set an ignition time & pattern (this ignites the middle cell). */
cell = floor(Cols/2) + Cols*floor(Rows/2);
ignMap[cell] = 0.0;
/* NOTE 6: create a standard fuel model catalog and a flame length table. */
////////////////////////////////
//Create fuel catalog
//Create 13 + 0 (no fuel model) standard NFFL models and creates space for
//aditional custom model
catalog = Fire_FuelCatalogCreateStandard("Standard", 14);
//Create aditional custom model based on NFFL1
//Only the PARTICLE LOAD is customized at the moment
if ( Fire_FuelModelCreate (
catalog, //FuelCatalogData instance
14, //fuel model number
"CUSTOM", //Name
"Custom Fuel model", //longer description
0.197, //bed depth (ft)
Fuel_Mext(catalog, 1), //moisture of extinction (dl)
Fuel_SpreadAdjustment(catalog, 1), //spread adjustment factor (dl)
1) != FIRE_STATUS_OK ) //maximum number of particles
{
fprintf(stderr, "%s\n", FuelCat_Error(catalog));
Fire_FuelCatalogDestroy(catalog);
return (NULL);
}
//Add a particle to the custom model nº 14
if ( Fire_FuelParticleAdd (
catalog, // FuelCatalogData instance pointer
14, //Custom fuel model id
Fuel_Type(catalog,1,0),
0.23, // Custom particle load (lbs/ft2)
3500, // surface-area-to-volume ratio (ft2/ft3)
Fuel_Density(catalog,1,0), //density (lbs/ft3)
Fuel_Heat(catalog,1,0), //heat of combustion (btus/lb)
Fuel_SiTotal(catalog,1,0), //total silica content (lb/lb)
Fuel_SiEffective(catalog,1,0)) //effective silica content (lb/lb)
!= FIRE_STATUS_OK )
{
fprintf(stderr, "%s\n", FuelCat_Error(catalog));
Fire_FuelCatalogDestroy(catalog);
return (NULL);
}
Fire_FlameLengthTable(catalog, 500, 0.1);
/* Calculate distance across cell to each neighbor and its azimuth. */
for ( n=0; n < 16; n++ ) {
nDist[n] = sqrt ( nCol[n] * CellWd * nCol[n] * CellWd
+ nRow[n] * CellHt * nRow[n] * CellHt );
if (n < 8)
nAzm[n] = n * 45.;
else {
nAzm[n] = atanf( (nCol[n] * CellWd) / (nRow[n] * CellHt) );
if ( nCol[n] > 0 && nRow[n] < 0) //1st quadrant
nAzm[n] = RadToDeg( fabs( nAzm[n] ) );
if ( nCol[n] > 0 && nRow[n] > 0) //2st quadrant
nAzm[n] = 180. - RadToDeg( nAzm[n] ) ;
if ( nCol[n] < 0 && nRow[n] > 0) //3st quadrant
nAzm[n] = RadToDeg( fabs( nAzm[n] ) )+ 180.;
if ( nCol[n] < 0 && nRow[n] < 0) //4st quadrant
nAzm[n] = 360. - RadToDeg( fabs( nAzm[n] ));
}
}
/* NOTE 7: find the earliest (starting) ignition time. */
for ( timeNext=INFINITY, cell=0; cell<cells; cell++ )
{
if ( ignMap[cell] < timeNext )
timeNext = ignMap[cell];
}
/* NOTE 8: loop until no more cells can ignite or fire reaches an edge. */
atEdge = 0;
//while ( timeNext < INFINITY && ! atEdge )
while ( timeNext < INFINITY)
{
timeNow = timeNext;
timeNext = INFINITY;
nTimes++;
/* NOTE 9: examine each ignited cell in the fuel array. */
for ( cell=0, row=0; row<Rows; row++ )
{
for ( col=0; col<Cols; col++, cell++ )
{
/* Skip this cell if it has not ignited. */
if ( ignMap[cell] > timeNow )
{
/* NOTE 12: first check if it is the next cell to ignite. */
if ( ignMap[cell] < timeNext )
timeNext = ignMap[cell];
continue;
}
/* NOTE 10: flag if the fire has reached the array edge. */
if ( row==0 || row==Rows-1 || col==0 || col==Cols-1 )
atEdge = 1;
/* NOTE 11: determine basic fire behavior within this cell. */
modelNumber = fuelMap[cell];
moisture[0] = m1Map[cell];
moisture[1] = m10Map[cell];
moisture[2] = m100Map[cell];
moisture[3] = m100Map[cell];
moisture[4] = mherbMap[cell];
moisture[5] = mwoodMap[cell];
Fire_SpreadNoWindNoSlope(catalog, modelNumber, moisture);
Fire_SpreadWindSlopeMax(catalog, modelNumber, wspdMap[cell],
wdirMap[cell], slpMap[cell], aspMap[cell]);
/* NOTE 12: examine each unignited neighbor. */
for ( n=0; n<16; n++ )
{
/* First find the neighbor's location. */
nrow = row + nRow[n];
ncol = col + nCol[n];
if ( nrow<0 || nrow>=Rows || ncol<0 || ncol>=Cols )
continue;
ncell = ncol + nrow*Cols;
/* Skip this neighbor if it is already ignited. */
if ( ignMap[ncell] <= timeNow )
continue;
/* Determine time to spread to this neighbor. */
Fire_SpreadAtAzimuth(catalog, modelNumber, nAzm[n], FIRE_NONE);
if ( (fpm = Fuel_SpreadAny(catalog, modelNumber)) > Smidgen)
{
minutes = nDist[n] / fpm;
/* Assign neighbor the earliest ignition time. */
if ( (ignTime = timeNow + minutes) < ignMap[ncell] )
{
ignMap[ncell] = ignTime;
Fire_FlameScorch(catalog, modelNumber, FIRE_FLAME);
flMap[ncell] = Fuel_FlameLength(catalog,modelNumber);
}
/* Keep track of next cell ignition time. */
if ( ignTime < timeNext )
timeNext = ignTime;
}
} /* next neighbor n */
} /* next source col */
} /* next source row */
} /* next time */
printf("There were %d time steps ending at %3.2f minutes (%3.2f hours).\n",
nTimes, timeNow, timeNow/60.);
/* NOTE 13: save the ignition & flame length maps. */
PrintMap(aspMap,"aspect.Map");
PrintMap(slpMap,"slope.Map");
PrintMap(ignMap, "ign.Map");
PrintMap(flMap, "flame.Map");
return (0);
}