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* MashWizard.cpp is part of Brewtarget, and is Copyright Philip G. Lee
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* (rocketman768@gmail.com), 2009.
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* Brewtarget is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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* Brewtarget is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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#include "MashWizard.h"
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#include "fermentable.h"
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#include <QMessageBox>
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#include "HeatCalculations.h"
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#include "stringparsing.h"
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#include "brewtarget.h"
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MashWizard::MashWizard(QWidget* parent) : QDialog(parent)
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connect(buttonBox, SIGNAL(accepted()), this, SLOT(wizardry()) );
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connect(buttonBox, SIGNAL(rejected()), this, SLOT(close()) );
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void MashWizard::setRecipe(Recipe* rec)
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void MashWizard::show()
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if( Brewtarget::useEnglishUnits() )
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label->setText(tr("Mash thickness (qt/lb)"));
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label->setText(tr("Mash thickness (L/kg)"));
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void MashWizard::wizardry()
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if( recObs == 0 || recObs->getMash() == 0 )
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Mash* mash = recObs->getMash();
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double grainMass = 0.0, massWater = 0.0;
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double grainDensity = HeatCalculations::rhoGrain_KgL;
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size = mash->getNumMashSteps();
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thickNum = Unit::qstringToSI(lineEdit_mashThickness->text());
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if( Brewtarget::useEnglishUnits() )
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thickness_LKg = thickNum * 2.086;
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thickness_LKg = thickNum;
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if( thickness_LKg <= 0.0 )
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QMessageBox::information(this, tr("Bad thickness"), tr("You must have a positive mash thickness."));
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// Ensure at least one mash step.
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QMessageBox::information(this, tr("No steps"), tr("You must have at least one mash step to run the wizard."));
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mashStep = mash->getMashStep(0);
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// Ensure first mash step is an infusion.
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if( mashStep->getType() != "Infusion" )
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QMessageBox::information(this, tr("First step"), tr("Your first mash step must be an infusion."));
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for( i = 0; i < recObs->getNumFermentables(); i++ )
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Fermentable* ferm = recObs->getFermentable(i);
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// NOTE: we are assuming it's in the mash because it's recommended.
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// We are also assuming it's a grain.
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if( ferm->getRecommendMash() )
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grainMass += ferm->getAmount_kg();
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grainMass = recObs->getGrainsInMash_kg();
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tf = mashStep->getStepTemp_c();
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t1 = mash->getGrainTemp_c();
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massWater = thickness_LKg * grainMass;
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MCw = HeatCalculations::Cw_calGC * massWater;
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MC = HeatCalculations::Cgrain_calGC * grainMass;
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// I am specifically ignoring BeerXML's request to only do this if mash->getEquipAdjust() is set.
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//if( mash->getEquipAdjust() )
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tw = MC/MCw * (tf-t1) + (mash->getTunSpecificHeat_calGC()*mash->getTunWeight_kg())/MCw * (tf-mash->getTunTemp_c()) + tf;
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// tw = MC/MCw * (tf-t1) + tf;
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// Can't have water above boiling.
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QMessageBox::information(this, tr("Mash too thick"), tr("Your mash is too thick for desired temp. at first step."));
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mashStep->setInfuseAmount_l(massWater);
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mashStep->setInfuseTemp_c(tw);
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// End of first step.
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// Add mass*specific heat constant of equipment to MC.
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// I am specifically ignoring BeerXML's request to only do this if mash->getEquipAdjust() is set.
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//if( mash->getEquipAdjust() )
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MC += mash->getTunSpecificHeat_calGC()*mash->getTunWeight_kg();
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for( i = 1; i < size; ++i )
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mashStep = mash->getMashStep(i);
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if( mashStep->getType() == "Temperature")
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else if( mashStep->getType() == "Decoction" )
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QMessageBox::warning(this, tr("Decoction"), tr("Haven't tested decoction calculations yet.\nUse at own risk."));
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double m_w, m_g, m_e, r;
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double c_w, c_g, c_e;
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tf = mashStep->getStepTemp_c();
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t1 = mash->getMashStep(i-1)->getStepTemp_c();
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m_w = 0; // Total mass of water.
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for(j = 0; j < i; ++j )
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m_w += mash->getMashStep(j)->getInfuseAmount_l();
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m_e = (mash->getEquipAdjust()) ? mash->getTunWeight_kg() : 0;
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c_w = HeatCalculations::Cw_calGC;
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c_g = HeatCalculations::Cgrain_calGC;
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c_e = (mash->getEquipAdjust()) ? mash->getTunSpecificHeat_calGC() : 0;
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// r is the ratio of water and grain to take out for decoction.
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r = ((m_w*c_w + m_g*c_g + m_e*c_e)*(tf-t1)) / ((m_w*c_w + m_g*c_g)*(100-tf) + (m_w*c_w + m_g*c_g)*(tf-t1));
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QMessageBox::critical(this, tr("Decoction error"), tr("Something went wrong in decoction calculation.") );
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Brewtarget::log(Brewtarget::ERROR, "Decoction: r=" + doubleToString(r));
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mashStep->setDecoctionAmount_l( r*(m_w + m_g/grainDensity) );
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tf = mashStep->getStepTemp_c();
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t1 = mash->getMashStep(i-1)->getStepTemp_c();
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tw = 100; // Assume adding boiling water to minimize final volume.
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MC += massWater * HeatCalculations::Cw_calGC; // Add MC product of last addition.
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massWater = (MC*(tf-t1))/(HeatCalculations::Cw_calGC * (tw-tf));
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mashStep->setInfuseAmount_l(massWater);
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mashStep->setInfuseTemp_c(tw);
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// Now, do a sparge step to get the total volume of the mash up to the boil size.
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double wortInBoil_l = recObs->estimateWortFromMash_l();
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if( recObs->getEquipment() != 0 )
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wortInBoil_l -= recObs->getEquipment()->getLauterDeadspace_l();
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double spargeWater_l = recObs->getBoilSize_l() - wortInBoil_l;
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if( spargeWater_l >= 0.0 )
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// If the recipe already has a mash step named "Batch Sparge",
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// find it and use it instead of making a new one.
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bool foundSparge = false;
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for( int j = 0; j < mash->getNumMashSteps(); ++j )
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if( mash->getMashStep(j)->getName() == "Batch Sparge" )
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mashStep = mash->getMashStep(j);
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mashStep = new MashStep(); // Or just make a new one.
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tf = 74; // 74C is recommended in John Palmer's How to Brew
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t1 = mash->getMashStep(size-1)->getStepTemp_c() - 10.0; // You will lose about 10C from last step.
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MC = recObs->getGrainsInMash_kg() * HeatCalculations::Cgrain_calGC
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+ HeatCalculations::absorption_LKg * recObs->getGrainsInMash_kg() * HeatCalculations::Cw_calGC
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+ mash->getTunWeight_kg() * mash->getTunSpecificHeat_calGC();
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massWater = spargeWater_l;
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tw = (MC/(massWater*HeatCalculations::Cw_calGC))*(tf-t1) + tf;
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mashStep->setName("Batch Sparge");
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mashStep->setType("Infusion");
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mashStep->setInfuseAmount_l(spargeWater_l);
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mashStep->setInfuseTemp_c(tw);
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mashStep->setEndTemp_c(tw);
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mashStep->setStepTemp_c(tf);
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mashStep->setStepTime_min(15);
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mash->addMashStep(mashStep);
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QMessageBox::information(this, tr("Too much wort"),
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tr("You have too much wort from the mash for your boil size. I suggest increasing the boil size by increasing the boil time, or reducing your mash thickness."));
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MashWizard.cpp
