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CellularAutomatonSimulation.java 3.75 KiB
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    package model;
    
    import controller.Simulation;
    import datastruct.Coordinate;
    
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    import datastruct.Matrix;
    
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    import javafx.scene.paint.Color;
    
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    import java.util.Iterator;
    
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    import java.util.Random;
    
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    /**
    
     * {@link CellularAutomatonSimulation} instances run <i>The Game of Life</i>.
    
     *
     *  @param <S> The type of state used in the simulation.
    
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     */
    
    public class CellularAutomatonSimulation<S extends State<S>>
    
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            implements Simulation {
    
    
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        private final Matrix<Cell<S>> grid;
    
        private final Cell<Integer> generationNumber = new Cell<>(0);
    
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        private final CellularAutomaton<S> automaton;
        private final Random generator;
    
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        /**
    
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         * Creates a new {@link CellularAutomatonSimulation} instance for a given automaton.
    
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         *
    
         * @param automaton  A description of the {@link CellularAutomaton}.
         * @param generator  The {@link Random} instance used for random state generation.
    
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         */
    
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        public CellularAutomatonSimulation(CellularAutomaton<S> automaton, Random generator) {
            this.automaton = automaton;
            this.grid = new Matrix<>(
                    automaton.numberOfColumns(),
                    automaton.numberOfRows(),
                    new ConstantCellInitializer<>(automaton.defaultState())
            );
            this.generator = generator;
    
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        }
    
    
        @Override
        public int numberOfColumns() {
    
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            return this.grid.width();
    
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        }
    
        @Override
        public int numberOfRows() {
    
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            return this.grid.height();
        }
    
    
        /**
         * Returns the {@link Cell} at the specified coordinate.
         *
         * @param coordinate The coordinate of the cell to retrieve.
         * @return The cell at the specified coordinate.
         */
    
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        public Cell<S> at(Coordinate coordinate) {
            return this.grid.get(coordinate);
    
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        }
    
    
        @Override
    
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        public void updateToNextGeneration() {
    
            this.generationNumber.set(this.generationNumber.get()+1);
    
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            Matrix<S> nextStates = this.nextGenerationMatrix();
            for (Coordinate coordinate : this.grid.coordinates()) {
                this.at(coordinate).set(nextStates.get(coordinate));
            }
        }
    
    
        /** Computes the {@link Matrix} of states obtained after a single step of updates
    
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         * of the simulation.
         *
         * @return the states of each cell after one generation
         */
        private Matrix<S> nextGenerationMatrix() {
    
            return new Matrix<>(
    
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                    this.grid.width(),
                    this.grid.height(),
                    new NextGenerationInitializer<>(this)
            );
    
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        }
        @Override
        public void next(Coordinate coordinate) {
    
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            S oldState = this.grid.get(coordinate).get();
            this.at(coordinate).set(oldState.next());
    
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        }
    
        @Override
        public void copy(Coordinate source, Coordinate destination) {
    
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            S state = this.at(source).get();
            this.at(destination).set(state);
    
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        }
    
        @Override
        public Color getColor(Coordinate coordinate) {
    
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            return this.at(coordinate).get().getColor();
    
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        }
    
        @Override
    
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        public void setChangeListener(Coordinate coordinate, Runnable listener) {
            this.at(coordinate).addOnChangeListener(
                    (oldValue, newValue) -> listener.run()
    
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            );
        }
    
    
        @Override
        public void setGenerationNumberChangeListener(OnChangeListener<Integer> listener){
            this.generationNumber.addOnChangeListener(listener);
    
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        }
    
    
    
        @Override
    
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        public void clear() {
    
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            for (Cell<S> cell : this.grid) {
                cell.set(this.automaton.defaultState());
            }
    
            this.generationNumber.set(0);
    
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        }
    
    
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        public void reset() {
    
            for (Cell<S> cell : this.grid) {
                cell.set(this.automaton.randomState(generator));
            }
            this.generationNumber.set(0);
    
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        }
    
        @Override
        public Iterator<Coordinate> iterator() {
            return this.grid.coordinates().iterator();
        }
    }