public override bool TryPlaceBlockForWorldGen(IBlockAccessor blAcc, BlockPos pos, BlockFacing onBlockFace, Random worldgenRand)
{
int cnt = 2 + worldgenRand.Next(25);
float depth = GameMath.Sqrt(GameMath.Sqrt(cnt));
float craterRadius = GameMath.Sqrt(cnt) * 1.25f;
// Look for even or downwards curved ground
if (pos.Y > 250 ||
!IsSolid(blAcc, pos.X, pos.Y - 3, pos.Z) ||
!IsSolid(blAcc, pos.X, pos.Y - (int)depth, pos.Z) ||
!IsSolid(blAcc, pos.X + (int)craterRadius, pos.Y - 1, pos.Z) ||
!IsSolid(blAcc, pos.X - (int)craterRadius, pos.Y - 1, pos.Z) ||
!IsSolid(blAcc, pos.X, pos.Y - 1, pos.Z - (int)craterRadius) ||
!IsSolid(blAcc, pos.X, pos.Y - 1, pos.Z + (int)craterRadius)
)
{
return(false);
}
int y1 = blAcc.GetTerrainMapheightAt(tmpPos.Set(pos.X - 5, pos.Y, pos.Z));
int y2 = blAcc.GetTerrainMapheightAt(tmpPos.Set(pos.X + 5, pos.Y, pos.Z));
int y3 = blAcc.GetTerrainMapheightAt(tmpPos.Set(pos.X - 0, pos.Y, pos.Z + 5));
int y4 = blAcc.GetTerrainMapheightAt(tmpPos.Set(pos.X - 0, pos.Y, pos.Z - 5));
if ((GameMath.Max(y1, y2, y3, y4) - GameMath.Min(y1, y2, y3, y4)) > 4)
{
return(false);
}
tmpPos = tmpPos.Set(pos.X, pos.Y - (int)depth - 2, pos.Z);
while (cnt-- > 0)
{
tmpPos.X += worldgenRand.Next(3) == 0 ? (worldgenRand.Next(3) - 1) : 0;
tmpPos.Y += worldgenRand.Next(8) == 0 ? (worldgenRand.Next(3) - 1) : 0;
tmpPos.Z += worldgenRand.Next(3) == 0 ? (worldgenRand.Next(3) - 1) : 0;
blAcc.SetBlock(this.BlockId, tmpPos);
}
int sueviteBlockId = api.World.GetBlock(new AssetLocation("rock-suevite")).BlockId;
int fragmentBlockId = api.World.GetBlock(new AssetLocation("loosestones-meteorite-iron")).BlockId;
int looseSueviteBlockId = api.World.GetBlock(new AssetLocation("loosestones-suevite")).BlockId;
float impactRockRadius = craterRadius * 1.2f;
int range = (int)Math.Ceiling(impactRockRadius);
int chunksize = api.World.BlockAccessor.ChunkSize;
Vec2i vecTmp = new Vec2i();
// 1. Generate a basin of suevite and lower terrain
for (int dx = -range; dx <= range; dx++)
{
for (int dz = -range; dz <= range; dz++)
{
float distImpactRockEdge = (dx * dx + dz * dz) / (impactRockRadius * impactRockRadius);
if (distImpactRockEdge > 1)
{
continue;
}
tmpPos.X = pos.X + dx;
tmpPos.Z = pos.Z + dz;
int surfaceY = blAcc.GetTerrainMapheightAt(tmpPos);
tmpPos.Y = surfaceY - (int)depth;
vecTmp.X = tmpPos.X / chunksize;
vecTmp.Y = tmpPos.Z / chunksize;
IMapChunk mapchunk = blAcc.GetMapChunk(vecTmp);
float q = 3 * Math.Max(0, 2 * (1 - distImpactRockEdge) - 0.2f);
tmpPos.Y -= (int)q + 1;
while (q > 0)
{
if (q < 1 && worldgenRand.NextDouble() > q)
{
break;
}
Block block = blAcc.GetBlock(tmpPos);
if (block != this && block.BlockMaterial == EnumBlockMaterial.Stone)
{
blAcc.SetBlock(sueviteBlockId, tmpPos);
}
q--;
tmpPos.Y++;
}
float distToCraterEdge = (dx * dx + dz * dz) / (craterRadius * craterRadius) + (float)worldgenRand.NextDouble() * 0.1f;
if (distToCraterEdge > 1)
{
continue;
}
q = depth * (1 - distToCraterEdge);
tmpPos.Y = surfaceY;
Block surfaceblock = blAcc.GetBlock(tmpPos);
Block abovesurfaceblock = blAcc.GetBlock(tmpPos.X, tmpPos.Y + 1, tmpPos.Z);
for (int i = -1; i <= (int)q; i++)
{
tmpPos.Y = surfaceY - i;
int id = i == (int)q ? surfaceblock.BlockId : 0;
blAcc.SetBlock(id, tmpPos);
}
mapchunk.WorldGenTerrainHeightMap[(tmpPos.Z % chunksize) * chunksize + (tmpPos.X % chunksize)] -= (ushort)q;
tmpPos.Y = blAcc.GetTerrainMapheightAt(tmpPos) + 1;
blAcc.SetBlock(abovesurfaceblock.BlockId, tmpPos);
}
}
int quantityFragments = 0;
if (worldgenRand.Next(10) == 0)
{
quantityFragments = worldgenRand.Next(10);
}
else if (worldgenRand.Next(5) == 0)
{
quantityFragments = worldgenRand.Next(5);
}
while (quantityFragments-- > 0)
{
tmpPos.Set(
pos.X + (worldgenRand.Next(11) + worldgenRand.Next(11)) / 2 - 5,
0,
pos.Z + (worldgenRand.Next(11) + worldgenRand.Next(11)) / 2 - 5
);
tmpPos.Y = blAcc.GetTerrainMapheightAt(tmpPos) + 1;
if (!blAcc.GetBlock(tmpPos.X, tmpPos.Y - 1, tmpPos.Z).SideSolid[BlockFacing.UP.Index])
{
continue;
}
if (worldgenRand.NextDouble() < 0.3)
{
blAcc.SetBlock(fragmentBlockId, tmpPos);
}
else
{
blAcc.SetBlock(looseSueviteBlockId, tmpPos);
}
}
//blAcc.SetBlock(61, pos.AddCopy(0, 20, 0));
return(true);
}