Subversion Repositories public iLand

#ifndef SAPLINGS_H

#define SAPLINGS_H

#include "grid.h"

struct SaplingTree {

    SaplingTree() { age=0; species_index=0; stress_years=0; flags=0; height=0.f;  }

    short unsigned int age;  // number of consectuive years the sapling suffers from dire conditions

    short unsigned int species_index; // index of the species within the resource-unit-species container

    unsigned char stress_years; // (upper 16bits) + age of sapling (lower 16 bits)

    unsigned char flags;

    float height; // height of the sapling in meter

    bool is_occupied() const { return height>0.f; }

    void setSapling(const float h_m, const int age_yrs, const int species_idx) { height=h_m; age=static_cast<short unsigned int>(age_yrs); stress_years=0; species_index=species_idx; }

};

#define NSAPCELLS 5

struct SaplingCell {

    enum ECellState { CellInvalid=0, CellFree=1, CellFull=2};

    SaplingCell() {

        state=CellInvalid;

    }

    ECellState state;

    SaplingTree saplings[NSAPCELLS];

    void checkState() { if (state==CellInvalid) return;

                        bool free=true;

                        for (int i=0;i<NSAPCELLS;++i) {

                            // locked for all species, if a sapling of one species >1.3m

                            if (saplings[i].height>1.3f) {free=false; break; }

                            // locked, if all slots are occupied.

                            if (!saplings[i].is_occupied())

                                free=true;

                        }

                        state = free? CellFree : CellFull;

                      }

};

class ResourceUnit;

class Saplings

{

public:

    Saplings();

    void setup();

    // main functions

    void establishment(const ResourceUnit *ru);

    void clearStats() { mAdded=0; mTested=0;}

    int saplingsAdded() const { return mAdded; }

    int pixelTested() const { return mTested; }

private:

    Grid<SaplingCell> mGrid;

    int mAdded;

    int mTested;

};

#endif // SAPLINGS_H