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Knockback on hit

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Well-met

Well-met

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greetings

I've been wanting to design a weapon and so far it's going well. However I'm looking to use the pushback code which can be seen on YOTP weapon signs that sends players and pigs flying around on hit. I believe this is the same state that's used in Forge by boarilla and bosses?

I would like this affect to only affect other players and pigmen, as I would guess only these two can be knocked around because they have the necessary anims.

SGwilson.lua reports 3 states used for this - knockback, knockback_pist, knockback_landed 

State{
        name = "knockback",
        tags = { "busy", "nopredict", "nomorph", "nodangle" },

        onenter = function(inst, data)
            ClearStatusAilments(inst)
            ForceStopHeavyLifting(inst)
            inst.components.rider:ActualDismount()
            inst.components.locomotor:Stop()
            inst:ClearBufferedAction()

            inst.AnimState:PlayAnimation("bucked")

            if data ~= nil then
                if data.propsmashed then
                    local item = inst.components.inventory:GetEquippedItem(EQUIPSLOTS.HANDS)
                    local pos
                    if item ~= nil then
                        pos = inst:GetPosition()
                        pos.y = TUNING.KNOCKBACK_DROP_ITEM_HEIGHT_HIGH
                        local dropped = inst.components.inventory:DropItem(item, true, true, pos)
                        if dropped ~= nil then
                            dropped:PushEvent("knockbackdropped", { owner = inst, knocker = data.knocker, delayinteraction = TUNING.KNOCKBACK_DELAY_INTERACTION_HIGH, delayplayerinteraction = TUNING.KNOCKBACK_DELAY_PLAYER_INTERACTION_HIGH })
                        end
                    end
                    if item == nil or not item:HasTag("propweapon") then
                        item = inst.components.inventory:FindItem(IsMinigameItem)
                        if item ~= nil then
                            pos = pos or inst:GetPosition()
                            pos.y = TUNING.KNOCKBACK_DROP_ITEM_HEIGHT_LOW
                            item = inst.components.inventory:DropItem(item, false, true, pos)
                            if item ~= nil then
                                item:PushEvent("knockbackdropped", { owner = inst, knocker = data.knocker, delayinteraction = TUNING.KNOCKBACK_DELAY_INTERACTION_LOW, delayplayerinteraction = TUNING.KNOCKBACK_DELAY_PLAYER_INTERACTION_LOW })
                            end
                        end
                    end
                end
                if data.radius ~= nil and data.knocker ~= nil and data.knocker:IsValid() then
                    local x, y, z = data.knocker.Transform:GetWorldPosition()
                    local distsq = inst:GetDistanceSqToPoint(x, y, z)
                    local rangesq = data.radius * data.radius
                    local rot = inst.Transform:GetRotation()
                    local rot1 = distsq > 0 and inst:GetAngleToPoint(x, y, z) or data.knocker.Transform:GetRotation() + 180
                    local drot = math.abs(rot - rot1)
                    while drot > 180 do
                        drot = math.abs(drot - 360)
                    end
                    local k = distsq < rangesq and .3 * distsq / rangesq - 1 or -.7
                    inst.sg.statemem.speed = (data.strengthmult or 1) * 12 * k
                    inst.sg.statemem.dspeed = 0
                    if drot > 90 then
                        inst.sg.statemem.reverse = true
                        inst.Transform:SetRotation(rot1 + 180)
                        inst.Physics:SetMotorVel(-inst.sg.statemem.speed, 0, 0)
                    else
                        inst.Transform:SetRotation(rot1)
                        inst.Physics:SetMotorVel(inst.sg.statemem.speed, 0, 0)
                    end
                end
            end
        end,

        onupdate = function(inst)
            if inst.sg.statemem.speed ~= nil then
                inst.sg.statemem.speed = inst.sg.statemem.speed + inst.sg.statemem.dspeed
                if inst.sg.statemem.speed < 0 then
                    inst.sg.statemem.dspeed = inst.sg.statemem.dspeed + .075
                    inst.Physics:SetMotorVel(inst.sg.statemem.reverse and -inst.sg.statemem.speed or inst.sg.statemem.speed, 0, 0)
                else
                    inst.sg.statemem.speed = nil
                    inst.sg.statemem.dspeed = nil
                    inst.Physics:Stop()
                end
            end
        end,

        timeline =
        {
            TimeEvent(8 * FRAMES, function(inst)
                inst.SoundEmitter:PlaySound("dontstarve/movement/bodyfall_dirt")
            end),
        },

        events =
        {
            EventHandler("animover", function(inst)
                if inst.AnimState:AnimDone() then
                    inst.sg:GoToState("knockback_pst")
                end
            end),
        },

        onexit = function(inst)
            if inst.sg.statemem.speed ~= nil then
                inst.Physics:Stop()
            end
        end,
    },

    State{
        name = "knockback_pst",
        tags = { "knockback", "busy", "nomorph", "nodangle" },

        onenter = function(inst)
            inst.AnimState:PlayAnimation("buck_pst")
        end,

        timeline =
        {
            TimeEvent(27 * FRAMES, function(inst)
                inst.sg:RemoveStateTag("knockback")
                inst.sg:RemoveStateTag("busy")
                inst.sg:RemoveStateTag("nomorph")
            end),
        },

        events =
        {
            EventHandler("animover", function(inst)
                if inst.AnimState:AnimDone() then
                    inst.sg:GoToState("idle")
                end
            end),
        },
    },

    State{
        name = "knockbacklanded",
        tags = { "knockback", "busy", "nopredict", "nomorph" },

        onenter = function(inst, data)
            ClearStatusAilments(inst)
            ForceStopHeavyLifting(inst)
            inst.components.rider:ActualDismount()
            inst.components.locomotor:Stop()
            inst:ClearBufferedAction()

            inst.AnimState:PlayAnimation("hit_spike_heavy")

            if data ~= nil then
                if data.propsmashed then
                    local item = inst.components.inventory:GetEquippedItem(EQUIPSLOTS.HANDS)
                    local pos
                    if item ~= nil then
                        pos = inst:GetPosition()
                        pos.y = TUNING.KNOCKBACK_DROP_ITEM_HEIGHT_LOW
                        local dropped = inst.components.inventory:DropItem(item, true, true, pos)
                        if dropped ~= nil then
                            dropped:PushEvent("knockbackdropped", { owner = inst, knocker = data.knocker, delayinteraction = TUNING.KNOCKBACK_DELAY_INTERACTION_LOW, delayplayerinteraction = TUNING.KNOCKBACK_DELAY_PLAYER_INTERACTION_LOW })
                        end
                    end
                    if item == nil or not item:HasTag("propweapon") then
                        item = inst.components.inventory:FindItem(IsMinigameItem)
                        if item ~= nil then
                            if pos == nil then
                                pos = inst:GetPosition()
                                pos.y = TUNING.KNOCKBACK_DROP_ITEM_HEIGHT_LOW
                            end
                            item = inst.components.inventory:DropItem(item, false, true, pos)
                            if item ~= nil then
                                item:PushEvent("knockbackdropped", { owner = inst, knocker = data.knocker, delayinteraction = TUNING.KNOCKBACK_DELAY_INTERACTION_LOW, delayplayerinteraction = TUNING.KNOCKBACK_DELAY_PLAYER_INTERACTION_LOW })
                            end
                        end
                    end
                end
                if data.radius ~= nil and data.knocker ~= nil and data.knocker:IsValid() then
                    local x, y, z = data.knocker.Transform:GetWorldPosition()
                    local distsq = inst:GetDistanceSqToPoint(x, y, z)
                    local rangesq = data.radius * data.radius
                    local rot = inst.Transform:GetRotation()
                    local rot1 = distsq > 0 and inst:GetAngleToPoint(x, y, z) or data.knocker.Transform:GetRotation() + 180
                    local drot = math.abs(rot - rot1)
                    while drot > 180 do
                        drot = math.abs(drot - 360)
                    end
                    local k = distsq < rangesq and .3 * distsq / rangesq - 1 or -.7
                    inst.sg.statemem.speed = (data.strengthmult or 1) * 8 * k
                    inst.sg.statemem.dspeed = 0
                    if drot > 90 then
                        inst.sg.statemem.reverse = true
                        inst.Transform:SetRotation(rot1 + 180)
                        inst.Physics:SetMotorVel(-inst.sg.statemem.speed, 0, 0)
                    else
                        inst.Transform:SetRotation(rot1)
                        inst.Physics:SetMotorVel(inst.sg.statemem.speed, 0, 0)
                    end
                end
            end

            inst.sg:SetTimeout(11 * FRAMES)
        end,

        onupdate = function(inst)
            if inst.sg.statemem.speed ~= nil then
                inst.sg.statemem.speed = inst.sg.statemem.speed + inst.sg.statemem.dspeed
                if inst.sg.statemem.speed < 0 then
                    inst.sg.statemem.dspeed = inst.sg.statemem.dspeed + .075
                    inst.Physics:SetMotorVel(inst.sg.statemem.reverse and -inst.sg.statemem.speed or inst.sg.statemem.speed, 0, 0)
                else
                    inst.sg.statemem.speed = nil
                    inst.sg.statemem.dspeed = nil
                    inst.Physics:Stop()
                end
            end
        end,

        timeline =
        {
            TimeEvent(9 * FRAMES, function(inst)
                inst.SoundEmitter:PlaySound("dontstarve/movement/bodyfall_dirt")
            end),
        },

        ontimeout = function(inst)
            inst.sg:GoToState("idle", true)
        end,

        onexit = function(inst)
            if inst.sg.statemem.speed ~= nil then
                inst.Physics:Stop()
            end
        end,
    },

I believe I'd have to use components.weapon:OnAttack but I'm kinda lost here.

Link to comment
https://forums.kleientertainment.com/forums/topic/104219-knockback-on-hit/
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