package net.glowstone.generator.biomegrid;
import net.glowstone.constants.GlowBiome;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Map;
import java.util.Set;
import static org.bukkit.block.Biome.*;
public class ShoreMapLayer extends MapLayer {
private static final Set<Integer> OCEANS = new HashSet<>();
private static final Map<Integer, Integer> SPECIAL_SHORES = new HashMap<>();
private final MapLayer belowLayer;
public ShoreMapLayer(long seed, MapLayer belowLayer) {
super(seed);
this.belowLayer = belowLayer;
}
@Override
public int[] generateValues(int x, int z, int sizeX, int sizeZ) {
int gridX = x - 1;
int gridZ = z - 1;
int gridSizeX = sizeX + 2;
int gridSizeZ = sizeZ + 2;
int[] values = belowLayer.generateValues(gridX, gridZ, gridSizeX, gridSizeZ);
int[] finalValues = new int[sizeX * sizeZ];
for (int i = 0; i < sizeZ; i++) {
for (int j = 0; j < sizeX; j++) {
// This applies shores using Von Neumann neighborhood
// it takes a 3x3 grid with a cross shape and analyzes values as follow
// 0X0
// XxX
// 0X0
// the grid center value decides how we are proceeding:
// - if it's not ocean and it's surrounded by at least 1 ocean cell
// it turns the center value into beach.
int upperVal = values[j + 1 + i * gridSizeX];
int lowerVal = values[j + 1 + (i + 2) * gridSizeX];
int leftVal = values[j + (i + 1) * gridSizeX];
int rightVal = values[j + 2 + (i + 1) * gridSizeX];
int centerVal = values[j + 1 + (i + 1) * gridSizeX];
if (!OCEANS.contains(centerVal) && (OCEANS.contains(upperVal) || OCEANS.contains(lowerVal) ||
OCEANS.contains(leftVal) || OCEANS.contains(rightVal))) {
finalValues[j + i * sizeX] =
SPECIAL_SHORES.containsKey(centerVal) ? SPECIAL_SHORES.get(centerVal) : GlowBiome.getId(BEACH);
} else {
finalValues[j + i * sizeX] = centerVal;
}
}
}
return finalValues;
}
static {
OCEANS.add(GlowBiome.getId(OCEAN));
OCEANS.add(GlowBiome.getId(DEEP_OCEAN));
SPECIAL_SHORES.put(GlowBiome.getId(EXTREME_HILLS), GlowBiome.getId(STONE_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(EXTREME_HILLS_PLUS), GlowBiome.getId(STONE_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(EXTREME_HILLS_MOUNTAINS), GlowBiome.getId(STONE_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(EXTREME_HILLS_PLUS_MOUNTAINS), GlowBiome.getId(STONE_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(ICE_PLAINS), GlowBiome.getId(COLD_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(ICE_MOUNTAINS), GlowBiome.getId(COLD_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(ICE_PLAINS_SPIKES), GlowBiome.getId(COLD_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(COLD_TAIGA), GlowBiome.getId(COLD_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(COLD_TAIGA_HILLS), GlowBiome.getId(COLD_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(COLD_TAIGA_MOUNTAINS), GlowBiome.getId(COLD_BEACH));
SPECIAL_SHORES.put(GlowBiome.getId(MUSHROOM_ISLAND), GlowBiome.getId(MUSHROOM_SHORE));
SPECIAL_SHORES.put(GlowBiome.getId(SWAMPLAND), GlowBiome.getId(SWAMPLAND));
SPECIAL_SHORES.put(GlowBiome.getId(MESA), GlowBiome.getId(MESA));
SPECIAL_SHORES.put(GlowBiome.getId(MESA_PLATEAU_FOREST), GlowBiome.getId(MESA_PLATEAU_FOREST));
SPECIAL_SHORES.put(GlowBiome.getId(MESA_PLATEAU_FOREST_MOUNTAINS), GlowBiome.getId(MESA_PLATEAU_FOREST_MOUNTAINS));
SPECIAL_SHORES.put(GlowBiome.getId(MESA_PLATEAU), GlowBiome.getId(MESA_PLATEAU));
SPECIAL_SHORES.put(GlowBiome.getId(MESA_PLATEAU_MOUNTAINS), GlowBiome.getId(MESA_PLATEAU_MOUNTAINS));
SPECIAL_SHORES.put(GlowBiome.getId(MESA_BRYCE), GlowBiome.getId(MESA_BRYCE));
}
}