菱形格子的点击判断

一段菱形格子的点击判断

local function GetGird(screenPosition)
    -- 2D相机算法
    -- local v = Camera.main:ScreenToWorldPoint(screenPosition)
    -- 3D相机
    local ray = Camera.main:ScreenPointToRay(screenPosition)
    local hitBool, hit = XluaOverrideMethod.Raycast(ray)
    local v = hit.point
    -- //推导过程
    -- //float x = (v.x / MapInfo.girdW + v.y / MapInfo.girdG) * 0.5f;
    -- //float y = (v.x / MapInfo.girdW - v.y / MapInfo.girdG) * 0.5f;
    -- //float x1 = (x +0.5f).ToInt();
    -- //float y1 = (y +0.5f).ToInt();
    local x = math.floor((v.x * static_config.girdWMul + v.y * static_config.girdGMul) * 0.5 + 0.5)
    local y = math.floor((v.x * static_config.girdWMul - v.y * static_config.girdGMul) * 0.5 + 0.5)
    -- print(x.."x1")
    -- y = math.max( y,0 )
    -- print(y.."y")
    x = math.max( x,0 )
    y = math.max( y,0 )
    -- //Debug.Log(string.Format("{0},{1}", v.x, v.y));
    -- //Debug.LogError(string.Format("{0},{1}", x, y));
    return x * static_config.MapSize + y,x,y
    -- //Debug.LogError(string.Format("{0},{1}", x1, y1));
end

girdW是格子宽

girdG是格子高

girdWMul 是格子宽的乘法转换