Modding Help Block Projectiles

I want to create a gun that shoots blocks of a certain kind. I see that things like Matter Block generators can do this. I see that the projectiles for the Matter Block generator do not use the frames file in the folder that it is in and do not reference the kind of block that it places on reap. Could someone explain this to me?

 

well, lua...

the dungeonpod(matterblockgen) uses a lua script to spawn the matter blocks if destroyed.
now.. this is a real weird process, but in the end, the block (matterblock) which is spawned is defined by the matterblockprojectile.projectile

i had to search a bit till i found it.

the object file...

Code:

{
  "objectName" : "dungeonpod",
  "rarity" : "Common",
  "objectType" : "wire",

  "category" : "--todo--",
  "price" : 0,
  "description" : "A material dispensing pod.",
  "shortdescription" : "Dispensing Pod",
  "race" : "generic",

  "apexDescription" : "This pod dispenses materials for crafting.",
  "avianDescription" : "Free crafting materials. Nice.",
  "floranDescription" : "Machine ssspit crafting items at Floran.",
  "glitchDescription" : "Wonder. A machine that gives materials for free!",
  "humanDescription" : "This is like a gashapon machine, but useful!",
  "hylotlDescription" : "A pod that supplies basic materials.",

  "inventoryIcon" : "dungeonpodicon.png",
  "lightColor" : [3, 47, 87],

  "orientations" : [


    {
      "imageLayers" : [ { "image" : "dungeonpod.png:default", "unlit" : true }, { "image" : "dungeonpod2.png:default" } ],
      "flipImages" : true,
      "imagePosition" : [-12, 0],
      "spaceScan" : 0.1,
      "anchors" : [ "bottom" ],
      "direction" : "left",
      "lightPosition" : [0, 3],
      "collision" : "platform"
    }
  ],

  "scripts" : [ "/objects/wired/tis1/tis1.lua" ],
  "scriptDelta" : 5,

  "animation" : "/objects/generic/dungeonpod/dungeonpod.animation",
  "animationParts" : {
    "tis1" : "dungeonpod.png"
  },
  "animationPosition" : [-12, 0],

  "useSounds" : [ "/sfx/objects/bardoor_open.wav" ],

  "inboundNodes" : [ ],
  "outboundNodes" : [ ],

  "breakDropOptions" : [ ],

  "projectileOptions" : [
    {
      "projectileType" : "matterblockprojectile2",
      "projectileParams" : { }
    }
  ]
}

well first the lua script

Code:

function init(args)
  if storage.initialized == nil then
    entity.setAnimationState("tis1State", "active")
    entity.setInteractive(true)
    entity.setColliding(false)
    storage.initialized = true
  end
end

function onInteraction(args)
  if isActive() then
      use(args)
  end
end

function hasCapability(capability)
  if capability == 'tis1' then
    return true
  else
    return false
  end
end

function isActive()
  return entity.animationState("tis1State") == "active"
end

function use(args)
  if isActive() then
    entity.setAnimationState("tis1State", "expire")
    entity.setInteractive(false)
    entity.playSound("useSounds")

    local projectile = entity.randomizeParameter("projectileOptions")

    world.spawnProjectile(projectile.projectileType, entity.position(), entity.id(), args.source, false, projectile.projectileParams)
  end
end

pretty much not saying anything about the block
let's look at the projectile

Code:

{
  "projectileName" : "matterblockprojectile2",
  "physics" : "grenade",
  "bounces" : -1,
  "level" : 3,
  "timeToLive" : 0.001,
  "damageKindImage" : "icon.png",
  "frames" : "matterblockprojectile2.png",
  "animationCycle" : 0.5,
  "frameNumber" : 4,
  "speed" : 45,
  "actionOnReap" : [
    {
      "action" : "projectile",
      "type" : "dungeonpodexplosion",
      "fuzzAngle" : 0,
      "angleAdjust" : 0
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : -20
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : -40
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 60
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : -80
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : -100
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : -120
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : -140
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : -180
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 0
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 20
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 40
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 60
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 80
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 100
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 120
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 140
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 180
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 10
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 30
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 50
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 70
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 90
    },
    {
      "action" : "projectile",
      "type" : "matterblockprojectile",
      "fuzzAngle" : 0,
      "angleAdjust" : 10
    }
  ],
  "power" : 0,
  "piercing" : true,
  "damageKind" : "default",
  "damageType" : "ignoresdef",
  "damagePoly" : [ [-36, 0], [-24, -24], [0, -36], [24, -24], [36, 0], [24, 24], [0, 36], [-24, 24] ],
  "flippable" : true,
  "universalDamage" : true
}

wait... the projectile file is using another projectile ? what

uhhh look at that! /projectiles/material/

Code:

{
  "projectileName" : "matterblockprojectile",
  "materialBlock" : 174,
  "physics" : "grenade",
  "level" : 3,

  // uses alternate animation path
  "frames" : "",
  "animationCycle" : 0,
  "frameNumber" : 0,
  "power" : 20,

  "speed" : 45,
  "fallSpeed" : 30, // this should be somekind of planet gravity scaled thing.

  "actionOnReap" : [
    {
      "action" : "placeMaterial"
    }
  ],
  "damageKind" : "slash"
}

it determains what block is spawned by an id..
even actionOnReap!! "placeMaterial"

i hope this helps you.