love2d 1. 入门

1、写个贪吃蛇

以下是main.lua的代码

snake = {}
speed = 50

function init()
    snake = {}
    local head = {x=love.graphics.getWidth()/2,y=love.graphics.getHeight()/2,direction='up'}
    table.insert(snake,head)
    local tail = {x=love.graphics.getWidth()/2,y=love.graphics.getHeight()/4*3,direction='up'}
    table.insert(snake,tail)
end

function love.load(arg)
    init()
end

function line2line(line1_x1,line1_y1,line1_x2,line1_y2,line2_x1,line2_y1,line2_x2,line2_y2)
    return (not((math.max(line1_x1,line1_x2)<math.min(line2_x1,line2_x2)) or (math.min(line1_x1,line1_x2)>math.max(line2_x1,line2_x2)))) and (not((math.max(line1_y1,line1_y2)<math.min(line2_y1,line2_y2)) or (math.min(line1_y1,line1_y2)>math.max(line2_y1,line2_y2))))
end

function love.update(dt)
    --head------------------------------------------------
    if  snake[1].direction == 'up' then
        snake[1].y = snake[1].y - dt*speed
    elseif  snake[1].direction == 'down' then
        snake[1].y = snake[1].y + dt*speed
    elseif  snake[1].direction == 'left' then
        snake[1].x = snake[1].x - dt*speed
    elseif  snake[1].direction == 'right' then
        snake[1].x = snake[1].x + dt*speed
    end
    --head------------------------------------------------

    --tail------------------------------------------------
    local tail_index = #snake
    if snake[tail_index].direction == 'up' then
        snake[tail_index].y = snake[tail_index].y - dt*speed
        if snake[tail_index].y <= snake[tail_index-1].y then
            table.remove(snake)
        end
    elseif snake[tail_index].direction == 'down' then
        snake[tail_index].y = snake[tail_index].y + dt*speed
        if snake[tail_index].y >= snake[tail_index-1].y then
            table.remove(snake)
        end
    elseif snake[tail_index].direction == 'left' then
        snake[tail_index].x = snake[tail_index].x - dt*speed
        if snake[tail_index].x <= snake[tail_index-1].x then
            table.remove(snake)
        end
    elseif snake[tail_index].direction == 'right' then
        snake[tail_index].x = snake[tail_index].x + dt*speed
        if snake[tail_index].x >= snake[tail_index-1].x then
            table.remove(snake)
        end
    end
    --tail------------------------------------------------

    --out of range------------------------------------------------
    if (snake[1].x<0 or snake[1].x>love.graphics.getWidth()) or (snake[1].y<0 or snake[1].y>love.graphics.getHeight()) then
        init()
        return
    end
    --out of range------------------------------------------------

    --碰撞------------------------------------------------
    for i=3,#snake-1,1 do --第3个点+第4个点开始，与头(第一个点)+第二个点，是否相交
        --print('ppp')
        if line2line(snake[1].x,snake[1].y,snake[2].x,snake[2].y,snake[i].x,snake[i].y,snake[i+1].x,snake[i+1].y) then
            init()
            return
        end
    end
    --碰撞------------------------------------------------
end

function love.draw(dt)
    for i=1,#snake-1,1 do
        love.graphics.line(snake[i].x,snake[i].y,snake[i+1].x,snake[i+1].y)
    end
end

function love.keypressed(key) --键盘检测回调函数，当键盘事件触发是调用
    if key == 'up' or key == 'down' then
        if  snake[1].direction ~= 'up' and  snake[1].direction ~= 'down' then
            snake[1].direction = key
            local head = {x=snake[1].x, y=snake[1].y, direction=snake[1].direction} --new head
            table.insert(snake,1,head)
        end
    elseif key == 'left' or key == 'right' then
        if  snake[1].direction ~= 'left' and  snake[1].direction ~= 'right' then
            snake[1].direction = key
            local head = {x=snake[1].x, y=snake[1].y, direction=snake[1].direction} --new head
            table.insert(snake,1,head)
        end
    end
end

2、打包成exe

把main.lua等同级目录的所有文件打包成xxx.zip，改名为xxx.love

放到love的文件中(love-11.3-win64)

新建build.bat，内容为