1 files changed, 64 insertions, 4 deletions

diff --git a/src/World.cpp b/src/World.cpp
index 474f77b81..5fd55a492 100644
--- a/src/World.cpp
+++ b/src/World.cpp
@@ -667,18 +667,23 @@ void cWorld::Start(void)
 void cWorld::GenerateRandomSpawn(void)
 {
 	LOGD("Generating random spawnpoint...");
-
+	bool foundSpawnPoint = false;
 	// Look for a spawn point at most 100 chunks away from map center:
 	for (int i = 0; i < 100; i++)
 	{
 		EMCSBiome biome = GetBiomeAt((int)m_SpawnX, (int)m_SpawnZ);
+
 		if (
 			(biome != biOcean) && (biome != biFrozenOcean) &&  // The biome is acceptable (don't want a small ocean island)
 			!IsBlockWaterOrIce(GetBlock((int)m_SpawnX, GetHeight((int)m_SpawnX, (int)m_SpawnZ), (int)m_SpawnZ))  // The terrain is acceptable (don't want to spawn inside a lake / river)
 		)
 		{
-			// A good spawnpoint was found
-			break;
+			if (CheckPlayerSpawnPoint((int)m_SpawnX, GetHeight((int)m_SpawnX, (int)m_SpawnZ), (int)m_SpawnZ))
+			{
+				// A good spawnpoint was found
+				foundSpawnPoint = true;
+				break;
+			}
 		}
 		// Try a neighboring chunk:
 		if ((GetTickRandomNumber(4) % 2) == 0)  // Randomise whether to increment X or Z coords
@@ -692,8 +697,63 @@ void cWorld::GenerateRandomSpawn(void)
 	}  // for i - 100*
 
 	m_SpawnY = (double)GetHeight((int)m_SpawnX, (int)m_SpawnZ) + 1.6f;  // 1.6f to accomodate player height
+	if (foundSpawnPoint)
+	{
+		LOGINFO("Generated random spawnpoint position at {%i, %i, %i}", (int)m_SpawnX, (int)m_SpawnY, (int)m_SpawnZ);
+	}
+	else
+	{
+		LOGINFO("Did not find an acceptable spawnpoint. Generated a random spawnpoint position at {%i, %i, %i}", (int)m_SpawnX, (int)m_SpawnY, (int)m_SpawnZ);
+	}  // Maybe widen the search instead?
+
+}
+
+
+
+
+
+bool cWorld::CheckPlayerSpawnPoint(int a_PosX, int a_PosY, int a_PosZ)
+{
+	static const struct
+	{
+		int x, z;
+	} Coords[] =
+	{
+		{ 0, 0 },
+		{ -1, 0 },
+		{ 1, 0 },
+		{ 0, -1 },
+		{ 0, 1 },
+	};
+
+	// Checking that spawnblock and surrounding blocks are air and not water/lava
+	for (size_t i = 0; i < ARRAYCOUNT(Coords); i++)
+	{
+		BLOCKTYPE BlockType = GetBlock(a_PosX + Coords[i].x, a_PosY, a_PosZ + Coords[i].x);
+
+		if (cBlockInfo::IsSolid(BlockType) || IsBlockLiquid(BlockType))
+		{
+			return false;
+		}
+	}  // for i - Coords[]
+
+	// Check if block below is solid
+	BLOCKTYPE BlockType = GetBlock(a_PosX, a_PosY - 1, a_PosZ);
+	if (!cBlockInfo::IsSolid(BlockType))
+	{
+		return false;
+	}
 
-	LOGINFO("Generated random spawnpoint position {%i, %i, %i}", (int)m_SpawnX, (int)m_SpawnY, (int)m_SpawnZ);
+	// Checking that all the blocks above the spawnpoint is air.
+	for (int i = a_PosY; i < cChunkDef::Height; i++)
+	{
+		BLOCKTYPE BlockType = GetBlock(a_PosX, i, a_PosZ);
+		if (cBlockInfo::IsSolid(BlockType))
+		{
+			return false;
+		}
+	}
+	return true;
 }