* Initial commit.

:)

source/World/Tile/SandTile.cpp

@@ -0,0 +1,92 @@
+#include "Tile.hpp"
+#include "Level.hpp"
+#include "FallingTile.hpp"
+
+//@NOTE: True for now
+bool SandTile::instaFall = true;
+
+SandTile::SandTile(int ID, int texture, Material* pMtl) : Tile(ID, texture, pMtl)
+{
+#ifdef ENH_ALLOW_SAND_GRAVITY
+	// the reason sand doesn't fall in the original MCPE:
+	setTicking(true);
+#endif
+}
+
+int SandTile::getTickDelay()
+{
+	return 3;
+}
+
+void SandTile::checkSlide(Level* level, int x, int y, int z)
+{
+	TileID tile = level->getTile(x, y - 1, z);
+
+	if (!isFree(level, x, y - 1, z))
+		// standing on something, don't fall
+		return;
+
+	if (y <= 0)
+		return;
+
+	if (SandTile::instaFall || !level->hasChunksAt(x - 32, y - 32, z - 32, x + 32, y + 32, z + 32))
+	{
+		level->setTile(x, y, z, 0);
+
+		int y2;
+		for (y2 = y - 1; y2 >= 0; y2--)
+		{
+			if (!isFree(level, x, y2, z))
+				break;
+		}
+
+		if (y2 > -1)
+			level->setTile(x, y2 + 1, z, m_ID);
+	}
+	else
+	{
+		// The original code attempts to spawn a falling tile entity, but it fails since it's not a player.
+		// The falling sand tile
+#if defined(ORIGINAL_CODE) || defined(ENH_ALLOW_SAND_GRAVITY)
+		//level->addEntity(new FallingTile(level, float(x) + 0.5f, float(y) + 0.5f, float(z) + 0.5f, m_ID));
+#endif
+	}
+}
+
+bool SandTile::isFree(Level* level, int x, int y, int z)
+{
+	TileID tile = level->getTile(x, y, z);
+	if (!tile)
+		return true;
+
+	if (tile == Tile::fire->m_ID)
+		return true;
+
+	if (Tile::tiles[tile]->m_pMaterial == Material::water)
+		return true;
+
+	if (Tile::tiles[tile]->m_pMaterial == Material::lava)
+		return true;
+
+	return false;
+}
+
+void SandTile::tick(Level* level, int x, int y, int z, Random* random)
+{
+	checkSlide(level, x, y, z);
+}
+
+void SandTile::neighborChanged(Level* level, int x, int y, int z, int dir)
+{
+#ifdef ENH_ALLOW_SAND_GRAVITY
+	level->addToTickNextTick(x, y, z, m_ID, getTickDelay());
+#endif
+}
+
+void SandTile::onPlace(Level* level, int x, int y, int z)
+{
+#ifdef ENH_ALLOW_SAND_GRAVITY
+	level->addToTickNextTick(x, y, z, m_ID, getTickDelay());
+#endif
+}
+