Bukkit

Needs worldedit!!
This plugin needs worldedit to start and load cannon schematics.
http://dev.bukkit.org/bukkit-plugins/worldedit/

This version works for 1.8.3+

Changelog:

• added sentry cannons. The cannon will search targets, calculate a solution, and fire on its own.
• new sentry cannons + new sentry design
• disabled angle message for aiming at default. To turn it back on set angles/anglesUpdateMessage: true in the cannon design.
• left click does not break the cannon anymore while the player is in cannon selection (command) mode
• added dismantle command to deconstruct a cannon (/cannons dismantle)
• added vault. Building cannon now costs money, and destroying gets you something back.
• made cannonslist static, finding cannons in a sphere,... is now static too. Show make it easier for other plugins.
• fixed impact message spam for redstone fired cannons
• clicking the barrel to aim is now possible during autoaiming
• impact predictor will show impact for the last projectile if nothing is loaded
• added support for named items (syntax: id:data:DisplayName:Lore1:Lore2)
• added alternative message colors for all status messages. You can use now &1, &2, ...
• changed magic id to Material. You can now also use 'TORCH:5' instead of '50:5'
• fixed duplicateiter.remove() when removing fake blocks
• added fast angle step size for accurate and rough aiming
• added new load delay