投篮机：空心入网才有加成

fx-hoops

local Hoops = {}
local KEY = { RIM_HALF = 22, GRAVITY = 420 }

function Shot.Step(ball, dt)
    ball.vy = ball.vy + KEY.GRAVITY * dt
    ball.x = ball.x + ball.vx * dt
    ball.y = ball.y + ball.vy * dt
    -- 篮板反弹: 大力出手的回头钱
    if ball.vx > 0
       and ball.x > SL:GetValue("boardX")
       and ball.x < SL:GetValue("boardX") + 12
       and ball.y > SL:GetValue("hoopY") - 40
       and ball.y < SL:GetValue("hoopY") + 20 then
        ball.vx = -math.abs(ball.vx) * 0.5
        SL:PlaySfx("board")
    end
    -- 入筐: 下行穿越筐口平面时看横向
    if ball.vy > 0 then
        local rimY = SL:GetValue("hoopY")
        local prevY = ball.y - ball.vy * dt
        if prevY <= rimY and ball.y > rimY then
            local rimX = SL:GetValue("rimX")
            local off = math.abs(ball.x - rimX)
            if off < KEY.RIM_HALF - 6 then
                SL:SetValue("score", SL:GetValue("score") + 2)
                SL:PlayFxAt("swish_ring", rimX, rimY)
                SL:ShowTipAbove(rimX, rimY, "空心! +2")
            elseif off < KEY.RIM_HALF then
                SL:SetValue("score", SL:GetValue("score") + 1)
                SL:ShowTipAbove(rimX, rimY, "+1")
            end
            SL:PlaySfx("net")
        end
    end
end

return Hoops