80 lines
2.1 KiB
Java
80 lines
2.1 KiB
Java
package dk.itu.mario.level.grammar;
|
|
|
|
import java.util.HashMap;
|
|
import java.util.List;
|
|
import java.util.Map;
|
|
import java.util.Random;
|
|
import java.util.Set;
|
|
import java.util.TreeSet;
|
|
|
|
import dk.itu.mario.level.LevelComponent.TYPE;
|
|
|
|
|
|
public class LevelGrammar {
|
|
private Variable start;
|
|
private Map<Variable, ProductionRule> ruleMap = new HashMap<Variable, ProductionRule>();
|
|
private Set<Variable> variables = new TreeSet<Variable>();
|
|
|
|
public void addVariable(Variable var) {
|
|
if (variables.contains(var)) {
|
|
throw new IllegalArgumentException(
|
|
"Grammar already contains variable: " + var);
|
|
}
|
|
variables.add(var);
|
|
}
|
|
|
|
public void addProductionRule(ProductionRule rule) {
|
|
if (ruleMap.containsKey(rule.getLHS())) {
|
|
throw new IllegalArgumentException(
|
|
"Grammar already contains rule with LHS: " + rule.getLHS());
|
|
}
|
|
ruleMap.put(rule.getLHS(), rule);
|
|
}
|
|
|
|
public String generateRandom(long randomSeed) {
|
|
System.out.println("Generating random level parameters using seed: "
|
|
+ randomSeed);
|
|
List<Variable> startRuleRHS = getRule(getStart()).getRHS();
|
|
StringBuilder sb = new StringBuilder();
|
|
for (Variable var : startRuleRHS) {
|
|
sb.append(var.toString());
|
|
}
|
|
return sb.toString();
|
|
}
|
|
|
|
public String generateRandom() {
|
|
System.out.println("Creating new random seed for LevelGrammar");
|
|
return generateRandom(new Random().nextLong());
|
|
}
|
|
|
|
//TODO: refactor to recursively add children to the current node based on production rule
|
|
public LevelParseTree generateRandomTree(long randomSeed, int width) {
|
|
System.out.println("Generating random level parameters using seed: "
|
|
+ randomSeed);
|
|
List<Variable> startRuleRHS = getRule(getStart()).getRHS();
|
|
|
|
ParseNode rootNode = new ParseNode(TYPE.FLAT,1.0);
|
|
LevelParseTree parseTree = new LevelParseTree(rootNode, 0, width);
|
|
|
|
for (Variable var : startRuleRHS) {
|
|
if (var.isTerminal()) {
|
|
rootNode.addChild(new ParseNode(TYPE.FLAT,0.5));
|
|
}
|
|
}
|
|
|
|
return parseTree;
|
|
}
|
|
|
|
public ProductionRule getRule(Variable var) {
|
|
return ruleMap.get(var);
|
|
}
|
|
|
|
public Variable getStart() {
|
|
return start;
|
|
}
|
|
|
|
public void setStart(Variable start) {
|
|
this.start = start;
|
|
}
|
|
}
|