cambridge-modpack/tetris/modes/snake.lua

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local GameMode = require 'tetris.modes.gamemode'
local Grid = require 'tetris.components.grid'
local Snake = GameMode:extend()
Snake.name = "Snake"
Snake.hash = "Snake"
Snake.tagline = "...It's literally just snake."
local moves = {
["right"] = {x=1, y=0},
["left"] = {x=-1, y=0},
["up"] = {x=0, y=-1},
["down"] = {x=0, y=1},
}
function Snake:new()
self.super:new()
self.grid = Grid(25, 24)
self.next_queue_length = 0
self.ready_frames = 1
self.ticks = 60
self.direction = "right"
self.last_move = "right"
self.snake = {
{x=11, y=15},
{x=12, y=15},
{x=13, y=15},
{x=14, y=15},
}
self.gem = {x=1, y=5}
self:generateGem()
self:updateGrid()
end
function Snake:isInSnake(p)
for _, point in pairs(self.snake) do
if point.x == p.x and point.y == p.y then
return true
end
end
return false
end
function Snake:updateGrid()
local snake = { skin = "2tie", colour = "G" }
local gem = { skin = "gem", colour = "R" }
self.grid:clear()
self.grid.grid[self.gem.y][self.gem.x] = gem
for y = 5, 24 do
for x = 1, 25 do
if self:isInSnake({x=x, y=y}) then
self.grid.grid[y][x] = snake
end
self.grid.grid_age[y][x] = 3
end
end
end
function Snake:generateGem()
repeat
self.gem.x = math.random(1, 25)
self.gem.y = math.random(5, 24)
until not self:isInSnake({x=self.gem.x, y=self.gem.y})
end
function Snake:advanceOneFrame(inputs, ruleset)
if self.game_over or self.completed then return true end
if self.last_move ~= "left" and not self.prev_inputs.right and inputs.right then
self.direction = "right"
elseif self.last_move ~= "right" and not self.prev_inputs.left and inputs.left then
self.direction = "left"
elseif self.last_move ~= "down" and not self.prev_inputs.up and inputs.up then
self.direction = "up"
elseif self.last_move ~= "up" and not self.prev_inputs.down and inputs.down then
self.direction = "down"
end
self.ticks = self.ticks - 1
if self.ticks <= 0 then
local move = moves[self.direction]
local new_x = self.snake[#self.snake].x + move.x
local new_y = self.snake[#self.snake].y + move.y
if (
new_x < 1 or new_x > 25 or new_y < 5 or new_y > 24 or
self:isInSnake({x=new_x, y=new_y})
) then
self.game_over = true
else
table.insert(self.snake, {
x = new_x,
y = new_y,
})
if new_x == self.gem.x and new_y == self.gem.y then
if #self.snake >= 500 then
self.completed = true
self:updateGrid()
return false
else
self:generateGem()
end
else
table.remove(self.snake, 1)
end
self:updateGrid()
self.last_move = self.direction
self.ticks = 10
end
end
self.prev_inputs = inputs
return false
end
local function noOutline(game, block, x, y, age)
local x = 0.75
return x, x, x, 1, 0
end
function Snake:drawGrid()
self.grid:drawCustom(noOutline, self)
end
function Snake:drawScoringInfo()
love.graphics.setColor(1, 1, 1, 1)
love.graphics.setFont(font_3x5_2)
love.graphics.print("SNAKE LENGTH", 480, 130)
love.graphics.print("GEM LOCATION", 480, 210)
love.graphics.setFont(font_3x5_3)
love.graphics.print(#self.snake, 480, 150)
love.graphics.print(self.gem.x .. ", " .. self.gem.y - 4, 480, 230)
end
function Snake:getHighscoreData()
return {
snake_length = #self.snake,
}
end
return Snake