local CircleMissileShape = {}

local FP = require("Common/fixedpoint")
local _posTemp = FP.newV2(0, 0)
local _dirTemp = FP.newV2(0, 0)
local _rightTemp = FP.newV2(0, 0)
local _radiusTemp = FP.newV1(0)
local _innerRadiusTemp = FP.newV1(0)
local FP_V2_IsDistanceSqrGreater = FP.V2.IsDistanceSqrGreater

function CircleMissileShape.SetMissileTrigger(data,pos,dir)
    _posTemp:Reset(pos)
    _dirTemp:Reset(dir)
    _rightTemp.x:Reset(dir.z)
    _rightTemp.z:Reset(dir.x):Negative()

    local dirClone = _dirTemp:cloneV2()
    local rightClone = _rightTemp:cloneV2()
    _posTemp:Add(dirClone:Mul(data.OffsetZ))
    _posTemp:Add(rightClone:Mul(data.OffsetX))
    
    FP.releaseV2(dirClone)
    FP.releaseV2(rightClone)
end

function CircleMissileShape.CanEnterTrigger(missile, hitEntityPos,hitEntityRadius)

    _radiusTemp:Reset(missile.overrideShapeParam1 or missile.MissileData.ShapeParam1)  --内联以节省性能，以前是 missile:GetShapeParam1
    if hitEntityRadius and hitEntityRadius > 0 then
        _radiusTemp:Add(hitEntityRadius)
    end
    _radiusTemp:Mul(_radiusTemp)

    local innerRadius = missile.overrideShapeParam3 or missile.MissileData.ShapeParam3  --内联以节省性能，以前是 missile:GetShapeParam3
    if innerRadius and innerRadius ~= FP.Const.Zero then
        _innerRadiusTemp:Reset(innerRadius):Mul(innerRadius)
        return not FP_V2_IsDistanceSqrGreater(_posTemp, hitEntityPos, _radiusTemp) and FP_V2_IsDistanceSqrGreater(_posTemp, hitEntityPos, _innerRadiusTemp)
    else
        return not FP_V2_IsDistanceSqrGreater(_posTemp, hitEntityPos, _radiusTemp)
    end
end

return CircleMissileShape