Space Cannon

Adds five scifi/space cannons with various projectile-speeds and explosion-strengths. The cannons need HV-Power from a technic network and can be controlled via formspec/hand, mesecons or digilines. They also need to charge first, which can take a couple of seconds depending on cannon-type.

The projectile detonates on impact but only in non-protected areas!

Screenshots

Dependencies

• Luanti/Minetest v0.4.16
• technic

Supports:

• mesecons
• digilines

Mesecons

An "on" signal triggers a fire-action.

Digilines

Fire a cannon:

if event.type == "program" then
 digiline_send("cannon", { command = "fire", verbose = false })
end

Example response from a "get" request:

{
    type = "digiline",
    channel = "c7",
    msg = {
        HV_EU_input = 0,
        HV_EU_demand = 0,
        dir = {
            y = 0,
            x = 0,
            z = 1
        },
        powerstorage = 10000,
        ready = true,
        origin = "c7",
        name = "spacecannon:cannon_green",
        pos = {
            y = 10,
            x = -64,
            z = -53
        }
    }
}

The "fire" request can specify an optional "verbose" flag. If this flag evaluates to true, then the following example response will be sent back. Note that if you have a large number of cannons, you will likely want to disable responses. N cannons firing and generating responses will cause N^2 messages to be processed, as each cannon receives the fire response from all of its peers. If N > 20, your LUAC will overheat. N > 900, and your server admin will want to have a chat with you.

{
    type = "digiline",
    channel = "c2",
    msg = {
        pos = {
            y = 10,
            x = -59,
            z = -53
        },
        origin = "c2",
        success = true
    }
}

Api

Modify the ability to shoot depending on position or playername:

spacecannon.can_shoot = function(pos, playername)
    return true
end

Contributors

• @BuckarooBanzay
• @dennisjenkins75
• @kiedtl

License

Code: MIT Media: CC-BY-SA 3.0

Attributions

• sounds/spacecannon_shoot.ogg