love2d矩形外框

我会使用多边形，参数1改为"line"而非"fill"，使用四个坐标，并将线的宽度设置为2。

points = {5, 5, 79, 5, 79, 79, 5, 79}
love.graphics.setLineWidth(2)
love.graphics.polygon("line", points)

这将绘制出您需要的形状。

您描述的编码内容听起来很像使用love.physics的教程，据我所知，love.physics不允许绘制空心形状。因此，如果您想实现物体从墙壁弹回的最终结果，我建议按照教程的描述添加3个类似于地面对象的对象作为墙壁和屋顶：

  --左墙
  objects.wall1 = {}
  objects.wall1.body = love.physics.newBody(world, 25, 650/2)
  objects.wall1.shape = love.physics.newRectangleShape(50, 650)
  objects.wall1.fixture = love.physics.newFixture(objects.wall1.body, objects.wall1.shape)

  --右墙
  objects.wall2 = {}
  objects.wall2.body = love.physics.newBody(world, 625, 650/2)
  objects.wall2.shape = love.physics.newRectangleShape(50, 650)
  objects.wall2.fixture = love.physics.newFixture(objects.wall2.body, objects.wall2.shape)

  --屋顶
  objects.roof = {}
  objects.roof.body = love.physics.newBody(world, 650/2, 25)
  objects.roof.shape = love.physics.newRectangleShape(650, 50)
  objects.roof.fixture = love.physics.newFixture(objects.roof.body, objects.roof.shape)

同时将绘制部分添加到love.draw()

love.graphics.setColor(0.76, 0.18, 0.05)
love.graphics.polygon("fill", objects.wall1.body:getWorldPoints(objects.wall1.shape:getPoints()))
love.graphics.polygon("fill", objects.wall2.body:getWorldPoints(objects.wall2.shape:getPoints()))
love.graphics.polygon("fill", objects.roof.body:getWorldPoints(objects.roof.shape:getPoints()))