public boolean intersects(BoundingBox box) {
final Vector3f rMax = box.getMax();
if (rMax.getX() < min.getX() || rMax.getY() < min.getY() || rMax.getZ() < min.getZ()) {
return false;
}
final Vector3f rMin = box.getMin();
return !(rMin.getX() > max.getX() || rMin.getY() > max.getY() || rMin.getZ() > max.getZ());
}
private void place() {
for (int x = start.getFloorX(); x < end.getFloorX(); x++) {
final double xOffset = (chunk.getX() + x + 0.5f - target.getX()) / horizontalSize;
for (int z = start.getFloorZ(); z < end.getFloorZ(); z++) {
final double zOffset = (chunk.getZ() + z + 0.5f - target.getZ()) / horizontalSize;
if (xOffset * xOffset + zOffset * zOffset >= 1) {
continue;
}
for (int y = end.getFloorY() - 1; y >= start.getFloorY(); y--) {
final double yOffset = (y + 0.5f - target.getY()) / verticalSize;
if (yOffset > -0.7 && xOffset * xOffset + yOffset * yOffset + zOffset * zOffset < 1) {
final int xx = chunk.getFloorX() + x;
final int zz = chunk.getFloorZ() + z;
final BlockMaterial material = blockData.get(xx, y, zz);
if (material.equals(VanillaMaterials.NETHERRACK)) {
blockData.set(xx, y, zz, VanillaMaterials.AIR);
}
}
}
}
}
}
@Override
protected void populate(
CuboidBlockMaterialBuffer blockData, Vector3f chunk, Vector3f originChunk, Random random) {
if (chunk.getFloorY() < 0 || chunk.getFloorY() >= 120) {
return;
}
if (random.nextInt(5) != 0) {
return;
}
final int numberOfCaves = random.nextInt(random.nextInt(random.nextInt(10) + 1) + 1);
for (int caveCount = 0; caveCount < numberOfCaves; caveCount++) {
final Vector3f target =
new Vector3f(
chunk.getX() + random.nextInt(16),
random.nextInt(random.nextInt(120) + 8),
chunk.getZ() + random.nextInt(16));
int numberOfSmallCaves = 1;
if (random.nextInt(4) == 0) {
generateLargeCaveBranch(blockData, originChunk, target, new Random(random.nextLong()));
numberOfSmallCaves += random.nextInt(4);
}
for (int count = 0; count < numberOfSmallCaves; count++) {
final double randomHorizontalAngle = random.nextDouble() * Math.PI * 2;
final double randomVerticalAngle = ((random.nextDouble() - 0.5f) * 2) / 8;
double horizontalScale = random.nextDouble() * 2 + random.nextDouble();
generateCaveBranch(
blockData,
originChunk,
target,
horizontalScale,
1,
randomHorizontalAngle,
randomVerticalAngle,
0,
0,
new Random(random.nextLong()));
}
}
}
public float getXSize() {
return max.getX() - min.getX();
}
private void generateCaveBranch(
CuboidBlockMaterialBuffer blockData,
Vector3f chunk,
Vector3f target,
double horizontalScale,
double verticalScale,
double horizontalAngle,
double verticalAngle,
int startingNode,
int nodeAmount,
Random random) {
final Vector3f middle = new Vector3f(chunk.getX() + 8, 0, chunk.getZ() + 8);
double horizontalOffset = 0;
double verticalOffset = 0;
random = new Random(random.nextLong());
if (nodeAmount <= 0) {
final int size = (OVERLAP - 1) * 16;
nodeAmount = size - random.nextInt(size / 4);
}
final int intersectionNode = random.nextInt(nodeAmount / 2) + nodeAmount / 4;
final boolean extraVerticalScale = random.nextInt(6) == 0;
final boolean lastNode;
if (startingNode == -1) {
startingNode = nodeAmount / 2;
lastNode = true;
} else {
lastNode = false;
}
for (; startingNode < nodeAmount; startingNode++) {
final double horizontalSize =
1.5 + TrigMath.sin((float) (startingNode * Math.PI / nodeAmount)) * horizontalScale;
final double verticalSize = horizontalSize * verticalScale;
target = target.add(Vector3f.createDirection((float) horizontalAngle, (float) verticalAngle));
if (extraVerticalScale) {
verticalAngle *= 0.92;
} else {
verticalAngle *= 0.7;
}
verticalAngle += verticalOffset * 0.1;
horizontalAngle += horizontalOffset * 0.1;
verticalOffset *= 0.9;
horizontalOffset *= 0.75;
verticalOffset += (random.nextDouble() - random.nextDouble()) * random.nextDouble() * 2;
horizontalOffset += (random.nextDouble() - random.nextDouble()) * random.nextDouble() * 4;
if (!lastNode) {
if (startingNode == intersectionNode && horizontalScale > 1) {
generateCaveBranch(
blockData,
chunk,
target,
random.nextDouble() * 0.5f + 0.5f,
1,
horizontalAngle - ((float) Math.PI / 2),
verticalAngle / 3,
startingNode,
nodeAmount,
new Random(random.nextLong()));
generateCaveBranch(
blockData,
chunk,
target,
random.nextDouble() * 0.5f + 0.5f,
1,
horizontalAngle + ((float) Math.PI / 2),
verticalAngle / 3,
startingNode,
nodeAmount,
new Random(random.nextLong()));
return;
}
if (random.nextInt(4) == 0) {
continue;
}
}
final double xOffset = target.getX() - middle.getX();
final double zOffset = target.getZ() - middle.getZ();
final double nodesLeft = nodeAmount - startingNode;
final double offsetHorizontalScale = horizontalScale + 18;
if ((xOffset * xOffset + zOffset * zOffset) - nodesLeft * nodesLeft
> offsetHorizontalScale * offsetHorizontalScale) {
return;
}
if (target.getX() < middle.getX() - 16 - horizontalSize * 2
|| target.getZ() < middle.getZ() - 16 - horizontalSize * 2
|| target.getX() > middle.getX() + 16 + horizontalSize * 2
|| target.getZ() > middle.getZ() + 16 + horizontalSize * 2) {
continue;
}
final Vector3f start =
new Vector3f(
GenericMath.floor(target.getX() - horizontalSize) - chunk.getFloorX() - 1,
GenericMath.floor(target.getY() - verticalSize) - 1,
GenericMath.floor(target.getZ() - horizontalSize) - chunk.getFloorZ() - 1);
final Vector3f end =
new Vector3f(
GenericMath.floor(target.getX() + horizontalSize) - chunk.getFloorX() + 1,
GenericMath.floor(target.getY() + verticalSize) + 1,
GenericMath.floor(target.getZ() + horizontalSize) - chunk.getFloorZ() + 1);
final NetherCaveNode node =
new NetherCaveNode(blockData, chunk, start, end, target, verticalSize, horizontalSize);
if (node.canPlace()) {
node.place();
}
if (lastNode) {
break;
}
}
}
