Examples with Equation cbit.vcell.math.Equation used on opensource projects

Example 31 with Equation

use of cbit.vcell.math.Equation in project vcell by virtualcell.

the class ModelOptimizationSpec method fromMath.

/**
 * Insert the method's description here.
 * Creation date: (11/1/2005 8:11:32 PM)
 * @return cbit.vcell.mapping.MathSystemHash
 * @param mathDesc cbit.vcell.math.MathDescription
 */
private static MathSystemHash fromMath(cbit.vcell.math.MathDescription mathDesc) {
    MathSystemHash hash = new MathSystemHash();
    hash.addSymbol(new MathSystemHash.IndependentVariable("t"));
    hash.addSymbol(new MathSystemHash.IndependentVariable("x"));
    hash.addSymbol(new MathSystemHash.IndependentVariable("y"));
    hash.addSymbol(new MathSystemHash.IndependentVariable("z"));
    Variable[] vars = (Variable[]) BeanUtils.getArray(mathDesc.getVariables(), Variable.class);
    for (int i = 0; i < vars.length; i++) {
        hash.addSymbol(new MathSystemHash.Variable(vars[i].getName(), vars[i].getExpression()));
    }
    SubDomain[] subDomains = (SubDomain[]) BeanUtils.getArray(mathDesc.getSubDomains(), SubDomain.class);
    for (int i = 0; i < subDomains.length; i++) {
        Equation[] equations = (Equation[]) BeanUtils.getArray(subDomains[i].getEquations(), Equation.class);
        for (int j = 0; j < equations.length; j++) {
            MathSystemHash.Variable var = (MathSystemHash.Variable) hash.getSymbol(equations[j].getVariable().getName());
            hash.addSymbol(new MathSystemHash.VariableInitial(var, equations[j].getInitialExpression()));
            if (equations[j] instanceof PdeEquation) {
                // hash.addSymbol(new MathSystemHash.VariableDerivative(var,pde.getRateExpression()));
                throw new RuntimeException("MathSystemHash doesn't yet support spatial models");
            } else if (equations[j] instanceof VolumeRegionEquation) {
                // hash.addSymbol(new MathSystemHash.VariableDerivative(var,vre.getRateExpression()));
                throw new RuntimeException("MathSystemHash doesn't yet support spatial models");
            } else if (equations[j] instanceof MembraneRegionEquation) {
                // hash.addSymbol(new MathSystemHash.VariableDerivative(var,mre.getRateExpression()));
                throw new RuntimeException("MathSystemHash doesn't yet support spatial models");
            } else if (equations[j] instanceof FilamentRegionEquation) {
                // hash.addSymbol(new MathSystemHash.VariableDerivative(var,fre.getRateExpression()));
                throw new RuntimeException("MathSystemHash doesn't yet support spatial models");
            } else if (equations[j] instanceof OdeEquation) {
                OdeEquation ode = (OdeEquation) equations[j];
                hash.addSymbol(new MathSystemHash.VariableDerivative(var, ode.getRateExpression()));
            }
        }
    }
    return hash;
}

Example 32 with Equation

use of cbit.vcell.math.Equation in project vcell by virtualcell.

the class ComsolModelBuilder method getVCCModel.

public static VCCModel getVCCModel(SimulationJob vcellSimJob) throws ExpressionException {
    MathDescription vcellMathDesc = vcellSimJob.getSimulation().getMathDescription();
    Geometry vcellGeometry = vcellMathDesc.getGeometry();
    GeometrySpec vcellGeometrySpec = vcellGeometry.getGeometrySpec();
    int vcellDim = vcellGeometrySpec.getDimension();
    VCCModel model = new VCCModel("Model", vcellDim);
    model.modelpath = "D:\\Developer\\eclipse\\workspace_refactor\\comsol_java\\src";
    model.comments = "Untitled\n\n";
    VCCModelNode comp1 = new VCCModelNode("comp1");
    model.modelnodes.add(comp1);
    // if (vcellDim != 2){
    // throw new RuntimeException("expecting 2D simulation");
    // }
    // 
    // assume initial geometry is circle centered at 0.5, 0.5 of radius 0.3
    // 
    // String comsolOutsideDomainName = "dif1";
    // String comsolInsideDomainName = "c1";
    VCCGeomSequence geom1 = new VCCGeomSequence("geom1", vcellDim);
    model.geometrysequences.add(geom1);
    VCCMeshSequence mesh1 = new VCCMeshSequence("mesh1", geom1);
    model.meshes.add(mesh1);
    VCCStudy std1 = new VCCStudy("std1");
    model.study = std1;
    TimeBounds timeBounds = vcellSimJob.getSimulation().getSolverTaskDescription().getTimeBounds();
    TimeStep timeStep = vcellSimJob.getSimulation().getSolverTaskDescription().getTimeStep();
    String beginTime = Double.toString(timeBounds.getStartingTime());
    String endTime = Double.toString(timeBounds.getEndingTime());
    String step = Double.toString(timeStep.getDefaultTimeStep());
    VCCStudyFeature time = new VCCTransientStudyFeature("time", beginTime, step, endTime);
    std1.features.add(time);
    if (vcellGeometrySpec.getImage() != null) {
        throw new RuntimeException("image-based geometries not yet supported by VCell's COMSOL model builder");
    }
    if (vcellGeometrySpec.getNumSubVolumes() == 0) {
        throw new RuntimeException("no subvolumes defined in geometry");
    }
    if (vcellGeometrySpec.getNumAnalyticOrCSGSubVolumes() != vcellGeometrySpec.getNumSubVolumes()) {
        throw new RuntimeException("only analytic and CSG subvolumes currently supported by VCell's COMSOL model builder");
    }
    // 
    // add geometry for all subvolumes
    // 
    HashMap<String, VCCGeomFeature> subvolumeNameFeatureMap = new HashMap<String, VCCGeomFeature>();
    SubVolume[] subVolumes = vcellGeometrySpec.getSubVolumes();
    for (int i = 0; i < subVolumes.length; i++) {
        SubVolume subvolume = subVolumes[i];
        if (subvolume instanceof CSGObject) {
            CSGObject vcellCSGObject = (CSGObject) subvolume;
            CSGNode vcellCSGNode = vcellCSGObject.getRoot();
            ArrayList<VCCGeomFeature> geomFeatureList = new ArrayList<VCCGeomFeature>();
            VCCGeomFeature feature = csgVisitor(vcellCSGNode, geomFeatureList, subvolume.getName());
            geom1.geomfeatures.addAll(geomFeatureList);
            if (i == 0) {
                // first subvolume (on top in ordinals) doesn't need any differencing
                subvolumeNameFeatureMap.put(subvolume.getName(), feature);
            } else {
                // have to subtract union of prior subvolumes
                ArrayList<VCCGeomFeature> priorFeatures = new ArrayList<VCCGeomFeature>();
                for (int j = 0; j < i; j++) {
                    CSGObject priorCSGObject = (CSGObject) subVolumes[j];
                    CSGNode priorCSGNode = priorCSGObject.getRoot();
                    geomFeatureList.clear();
                    VCCGeomFeature priorFeature = csgVisitor(priorCSGNode, geomFeatureList, subvolume.getName());
                    priorFeatures.add(priorFeature);
                    geom1.geomfeatures.addAll(geomFeatureList);
                }
                VCCDifference diff = new VCCDifference("diff" + subvolume.getName(), Keep.off);
                diff.input.add(feature);
                diff.input2.addAll(priorFeatures);
                geom1.geomfeatures.add(diff);
                subvolumeNameFeatureMap.put(subvolume.getName(), diff);
            }
        } else {
            throw new RuntimeException("only CSG subvolumes currently supported by VCell's COMSOL model builder");
        }
    }
    // 
    // add geometry for all surfaceClasses
    // 
    HashMap<String, VCCGeomFeature> surfaceclassNameFeatureMap = new HashMap<String, VCCGeomFeature>();
    SurfaceClass[] surfaceClasses = vcellGeometry.getGeometrySurfaceDescription().getSurfaceClasses();
    for (int i = 0; i < surfaceClasses.length; i++) {
        SurfaceClass surfaceClass = surfaceClasses[i];
        Set<SubVolume> adjacentSubvolumes = surfaceClass.getAdjacentSubvolumes();
        if (adjacentSubvolumes.size() != 2) {
            throw new RuntimeException("expecting two adjacent subvolumes for surface " + surfaceClass.getName() + " in COMSOL model builder");
        }
        // find adjacent Geometry Features (for subvolumes)
        Iterator<SubVolume> svIter = adjacentSubvolumes.iterator();
        SubVolume subvolume0 = svIter.next();
        SubVolume subvolume1 = svIter.next();
        ArrayList<VCCGeomFeature> adjacentFeatures = new ArrayList<VCCGeomFeature>();
        adjacentFeatures.add(subvolumeNameFeatureMap.get(subvolume0.getName()));
        adjacentFeatures.add(subvolumeNameFeatureMap.get(subvolume1.getName()));
        String name = "inter_" + subvolume0.getName() + "_" + subvolume1.getName();
        // surfaces are dimension N-1
        int entitydim = vcellDim - 1;
        VCCIntersectionSelection intersect_subvolumes = new VCCIntersectionSelection(name, entitydim);
        intersect_subvolumes.input.addAll(adjacentFeatures);
        geom1.geomfeatures.add(intersect_subvolumes);
        surfaceclassNameFeatureMap.put(surfaceClass.getName(), intersect_subvolumes);
    }
    SimulationSymbolTable symbolTable = new SimulationSymbolTable(vcellSimJob.getSimulation(), vcellSimJob.getJobIndex());
    // 
    for (SubDomain subDomain : Collections.list(vcellMathDesc.getSubDomains())) {
        for (Equation equ : subDomain.getEquationCollection()) {
            if (equ instanceof PdeEquation || equ instanceof OdeEquation) {
                VCCGeomFeature geomFeature = null;
                final int dim;
                if (subDomain instanceof CompartmentSubDomain) {
                    geomFeature = subvolumeNameFeatureMap.get(subDomain.getName());
                    dim = vcellDim;
                } else if (subDomain instanceof MembraneSubDomain) {
                    geomFeature = surfaceclassNameFeatureMap.get(subDomain.getName());
                    dim = vcellDim - 1;
                } else {
                    throw new RuntimeException("subdomains of type '" + subDomain.getClass().getSimpleName() + "' not yet supported in COMSOL model builder");
                }
                if (geomFeature == null) {
                    throw new RuntimeException("cannot find COMSOL geometry feature named " + subDomain.getName() + " in COMSOL model builder");
                }
                VCCConvectionDiffusionEquation cdeq = new VCCConvectionDiffusionEquation("cdeq_" + equ.getVariable().getName(), geom1, geomFeature, dim);
                cdeq.fieldName = equ.getVariable().getName();
                cdeq.initial = MathUtilities.substituteModelParameters(equ.getInitialExpression(), symbolTable).flatten().infix();
                cdeq.sourceTerm_f = MathUtilities.substituteModelParameters(equ.getRateExpression(), symbolTable).flatten().infix();
                if (equ instanceof PdeEquation) {
                    PdeEquation pde = (PdeEquation) equ;
                    cdeq.diffTerm_c = MathUtilities.substituteModelParameters(pde.getDiffusionExpression(), symbolTable).flatten().infix();
                    if (subDomain instanceof CompartmentSubDomain) {
                        CompartmentSubDomain compartmentSubdomain = (CompartmentSubDomain) subDomain;
                        ArrayList<String> be = new ArrayList<String>();
                        if (pde.getVelocityX() != null) {
                            be.add(MathUtilities.substituteModelParameters(pde.getVelocityX(), symbolTable).flatten().infix());
                        } else {
                            be.add("0");
                        }
                        if (vcellDim >= 2) {
                            if (pde.getVelocityY() != null) {
                                be.add(MathUtilities.substituteModelParameters(pde.getVelocityY(), symbolTable).flatten().infix());
                            } else {
                                be.add("0");
                            }
                        }
                        if (vcellDim == 3) {
                            if (pde.getVelocityY() != null) {
                                be.add(MathUtilities.substituteModelParameters(pde.getVelocityZ(), symbolTable).flatten().infix());
                            } else {
                                be.add("0");
                            }
                        }
                        cdeq.advection_be = be.toArray(new String[vcellDim]);
                        // 
                        // look for membrane boundary conditions for this variable
                        // 
                        MembraneSubDomain[] membraneSubdomains = vcellMathDesc.getMembraneSubDomains(compartmentSubdomain);
                        for (MembraneSubDomain membraneSubdomain : membraneSubdomains) {
                            JumpCondition jumpCondition = membraneSubdomain.getJumpCondition((VolVariable) pde.getVariable());
                            if (jumpCondition != null) {
                                Expression fluxExpr = null;
                                if (membraneSubdomain.getInsideCompartment() == compartmentSubdomain) {
                                    fluxExpr = jumpCondition.getInFluxExpression();
                                } else if (membraneSubdomain.getOutsideCompartment() == compartmentSubdomain) {
                                    fluxExpr = jumpCondition.getOutFluxExpression();
                                }
                                String name = equ.getVariable().getName() + "_flux_" + membraneSubdomain.getName();
                                VCCGeomFeature selection = surfaceclassNameFeatureMap.get(membraneSubdomain.getName());
                                VCCFluxBoundary fluxBoundary = new VCCFluxBoundary(name, selection, vcellDim - 1);
                                fluxBoundary.flux_g = MathUtilities.substituteModelParameters(fluxExpr, symbolTable).flatten().infix();
                                cdeq.features.add(fluxBoundary);
                            }
                        }
                    }
                }
                model.physics.add(cdeq);
            }
        }
    }
    // 
    return model;
}