指南车：车怎么转小人指南

 fx-southpoint

local SouthPoint = {}
local cartAng, turnT, turnDir = -1.5708, 0, 1

function SP.Tick(dt)
    -- 车沿轨迹行驶 + 随机转弯
    if turnT > 0 then
        turnT = turnT - dt
        cartAng = cartAng + turnDir * (SL:GetValue("turnRate") or 80) / 100 * 1.4 * dt
    else
        turnT = 1.5 + math.random() * 2
        turnDir = math.random() < 0.5 and -1 or 1
    end
    local x = SL:GetValue("trackCX") + math.cos(cartAng) * SL:GetValue("trackR")
    local y = SL:GetValue("trackCY") + math.sin(cartAng) * SL:GetValue("trackR") * 0.8
    SL:SetActorPos("cart", x, y)
    SL:SetActorRotate("cart", cartAng * 2.4)
    -- 小人: 底座反向旋转抵消车身转向
    SL:SetActorRotate("figure", -cartAng * 2.4)
    -- 小人手臂永远指向南方
    SL:DrawArm("figure", 0, 14)
end

function SP.AutoDrive()
    -- 自动行驶: 随机转弯段与直行段交替
    if turnT <= 0 and math.random() < 0.8 then
        turnT = 1 + math.random() * 1.5
        turnDir = math.random() < 0.5 and -1 or 1
    end
end

return SP