Absolute Beginner’s Guide to Minecraft® Mods Programming, Second Edition

26. Make a World Change over Time

In This Chapter

• Spawn 100 animals with one command

• Indicate that a mod has handled a command

• Let a player turn a mod on and off

• Listen to events when an item has been spawned

• Determine the type and quantity of the item

• Cancel an event to change its normal behavior

• Examine a block to determine its material

• Plant a tree sapling

The world in a Minecraft game is incredibly huge. A player can walk in the same direction for 30 million blocks before reaching an edge.

But as big as it is, the world remains almost entirely the same without a player’s actions. If you left an area and didn’t come back to it for weeks while exploring elsewhere, when you returned, the hills, trees, and other objects would ...