流星火雨：天上掉的不是雨是火

fx-meteors

local Meteor = {}
local KEY = { GAP = 0.28 }

local function BuildPlan(cx, cy, count)
    local plan = {}
    for i = 1, count - 1 do
        local ang = (i / (count - 1)) * 6.28 + math.random() * 0.5
        local rad = 120 - i * 8
        plan[i] = { t = i * KEY.GAP,
                    x = cx + math.cos(ang) * rad,
                    y = cy + math.sin(ang) * rad * 0.4,
                    big = false }
    end
    plan[count] = { t = count * KEY.GAP + 0.4, x = cx, y = cy, big = true }
    return plan
end

function Meteor.Cast(self_, target)
    local tx = SL:GetValue("actorX", target)
    local ty = SL:GetValue("actorY", target)
    local plan = BuildPlan(tx, ty, 6)
    SL:PlayFxAt("sky_redden", 0, 0)
    for i = 1, #plan do
        SL:ScheduleOnce(function()
            local p = plan[i]
            local ox = p.x + math.random(-6, 6)      -- 微抖动防完美重叠
            SL:PlayFlyFx("meteor", ox + 220, -40, p.x, p.y, 0.42)
            SL:ScheduleOnce(function()
                SL:PlayFxAt("meteor_hit", p.x, p.y)
                if p.big then
                    SL:ScreenShake(0.32, 6)
                    SL:DeductHp(target, 33)
                    SL:ShowHitNum(target, 33, "fire_big")
                    SL:PlayActorAct(target, "stuck")
                else
                    SL:ScreenShake(0.14, 2)
                end
            end, 0.42)
        end, plan[i].t)
    end
end

return Meteor