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https://github.com/Dejvino/roadtrip
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Map: added base classes for consistent procedural generation. To be used for maps.
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parent
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50
src/roadtrip/model/AbstractProceduralBlock.java
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50
src/roadtrip/model/AbstractProceduralBlock.java
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package roadtrip.model;
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import java.lang.reflect.Constructor;
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import java.lang.reflect.InvocationTargetException;
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import java.util.Random;
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/**
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* Created by dejvino on 21.01.2017.
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*/
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public abstract class AbstractProceduralBlock implements ProceduralBlock
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{
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private long seed;
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public AbstractProceduralBlock(long seed)
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{
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this.seed = seed;
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}
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@Override
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public long getBlockSeed()
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{
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return seed;
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}
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@Override
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public Random getBlockRandom()
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{
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return new Random(seed);
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}
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@Override
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public long getSubBlockSeed(String subBlockKey)
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{
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return (String.valueOf(seed) + "::" + subBlockKey).hashCode();
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}
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@Override
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public <T extends ProceduralBlock> T getSubBlock(String subBlockKey, Class<T> subBlockClass)
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{
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if (subBlockClass == null) throw new NullPointerException("subBlockClass");
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try {
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Constructor<T> constructor = subBlockClass.getConstructor(Long.class);
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return constructor.newInstance(getSubBlockSeed(subBlockKey));
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} catch (NoSuchMethodException e) {
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throw new IllegalArgumentException("Class " + subBlockClass + " does not have the default constructor with a single 'long' parameter.", e);
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} catch (IllegalAccessException | InstantiationException | InvocationTargetException e) {
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throw new IllegalArgumentException("Unable to instantiate sub-block.", e);
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}
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}
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}
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src/roadtrip/model/ProceduralBlock.java
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39
src/roadtrip/model/ProceduralBlock.java
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package roadtrip.model;
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import java.util.Random;
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/**
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* Created by dejvino on 21.01.2017.
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*/
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public interface ProceduralBlock
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{
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/**
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* The main PRNG seed defining this block's content.
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* @return Seed value.
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*/
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long getBlockSeed();
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/**
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* Random generator initialized with the block's seed.
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*
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* @return fresh PRNG.
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*/
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Random getBlockRandom();
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/**
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* Provides a seed to be used with a sub-block with a given key (identifier).
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*
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* @param subBlockKey
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* @return Sub-block seed.
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*/
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long getSubBlockSeed(String subBlockKey);
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/**
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* Provides a sub-block of the given class. The sub-block's seed is based on this block's seed.
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*
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* @param subBlockClass
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* @param <T>
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* @return Newly added sub-block.
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*/
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<T extends ProceduralBlock> T getSubBlock(String subBlockKey, Class<T> subBlockClass);
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}
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