Implement basic structure config

src/main/java/com/dfsek/terra/math/BaseHeightFunction.java

@@ -0,0 +1,29 @@
+package com.dfsek.terra.math;
+
+import org.polydev.gaea.math.FastNoise;
+import org.polydev.gaea.math.parsii.eval.Expression;
+import org.polydev.gaea.math.parsii.eval.Function;
+
+import java.util.List;
+
+public class BaseHeightFunction implements Function {
+    private FastNoise gen;
+    @Override
+    public int getNumberOfArguments() {
+        return 3;
+    }
+
+    @Override
+    public double eval(List<Expression> list) {
+        return gen.getSimplexFractal((float) list.get(0).evaluate(), (float) list.get(1).evaluate(), (float) list.get(2).evaluate());
+    }
+
+    public void setNoise(FastNoise gen) {
+        this.gen = gen;
+    }
+
+    @Override
+    public boolean isNaturalFunction() {
+        return true;
+    }
+}