蓄力跳桩：按多久跳多远

fx-jump

local ChargeJump = {}
local CONST = { MSG_ID = 12290, KEY = "ChargeJump", GRAVITY = 900, MAX_CHG = 1.1 }

-- 按下: 进入蓄力
function ChargeJump.OnPressDown(myID)
    ChargeJump._chg = 0
    ChargeJump._charging = true
    ChargeJump._myID = myID
end

-- 松手: 按蓄力比例起跳
function ChargeJump.OnPressUp()
    if not ChargeJump._charging then return end
    ChargeJump._charging = false
    local p = math.min(1, ChargeJump._chg / CONST.MAX_CHG)
    ChargeJump._vx = 150 + p * 260
    ChargeJump._vy = -(420 + p * 160)
    ChargeJump._flying = true
end

function ChargeJump:Update(dt)
    if self._charging then
        self._chg = math.min(CONST.MAX_CHG, self._chg + dt)
        self._crouch = math.min(14, self._chg * 16)     -- 下蹲压缩做视觉预告
        return
    end
    if not self._flying then return end
    self._vy = self._vy + CONST.GRAVITY * dt
    self._x = self._x + self._vx * dt
    self._y = self._y + self._vy * dt
    for _, p in ipairs(self._pillars) do
        if self._vy > 0 and math.abs(self._x - p.x) <= p.w / 2 and self._y >= p.top then
            self._flying = false
            self._y = p.top
            self._score = self._score + 1               -- 站上桩头
            SL:ShowSystemTips("跳上桩头 " .. self._score)
            return
        end
    end
    if self._y >= GROUND then self:_FallToGround() end  -- 落空重来
end

return ChargeJump