Difference between revisions of "Love - Lemmings Movement"

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(Variables Required)
Line 19: Line 19:
 
local height = 800
 
local height = 800
  
local lemtime = 2
+
local lemtime = 2 -- time between lemmings
 
local elapsed = lemtime
 
local elapsed = lemtime
local maxlem = 10
+
local maxlem = 10 -- number of lemmings to create
local lemcount = 0
+
local lemcount = 0 -- used to count the number of lemmings created
  
local startx = 100
+
local startx = 100 -- drop position for new lemmings
 
local starty = 100
 
local starty = 100
 
</syntaxhighlight>
 
</syntaxhighlight>

Revision as of 11:01, 11 July 2019

This tutorial will create the movement for an individual Lemming, it will fall to the ground and then move in one direction until it hits something it can't climb and then switch direction.

I have extended this by creating different subclasses of lemming, ones to block, explode, tunnel, bridge and so on.

I used this image for the map:

Level.png

I also made this map for my extended version:

Levelnew.png

I used this image for a lemming: Lemming.png

Variables Required

local width = 800
local height = 800

local lemtime = 2 -- time between lemmings
local elapsed = lemtime
local maxlem = 10 -- number of lemmings to create
local lemcount = 0 -- used to count the number of lemmings created

local startx = 100 -- drop position for new lemmings
local starty = 100

Lemmings Class & List of Lemmings

Lems = {}

function Lem(x,y)
	local self = {
		direction = 1,
		climbheight = 4,
		width = 10,
		height = 20,
		xpos = x,
		ypos=y
	}
	
	function self.update(dt)
		bl = self.checkground(self.xpos,self.ypos + self.height)
		br = self.checkground(self.xpos + self.width,self.ypos + self.height)
		if not bl and not br then
			self.ypos=self.ypos+1
		else
			local testheight = 0
			local found = false
			while not found and testheight <= self.climbheight do
				if self.direction == 1 then
					frontx = self.xpos + self.width
					fronty =  self.ypos + (self.height) - testheight
				else
					frontx = self.xpos - 1
					fronty =  self.ypos + (self.height) - testheight
				end	
				if not self.checkground(frontx, fronty) then
					self.xpos = self.xpos+self.direction
					self.ypos = self.ypos - testheight
					found=true
				end

				testheight = testheight + 1
			end
				
			if not found then
				self.direction = self.direction * -1
			end
		end
	end
	
	function self.checkground(x,y)
		if mapdata:getPixel(x,y) ~= bgcolor then
			return true
		else
			return false
		end	
	end
		
	return self	
end

Method to Create Lemming

function createlem()
	if lemcount<maxlem then
		Lems[lemcount] = Lem(startx,starty)
		lemcount = lemcount + 1
	end
end

love.load method

function love.load()
	love.window.setMode(width, height)
	mapdata = love.image.newImageData("level.png")
	map = love.graphics.newImage(mapdata)
	bgcolor = mapdata:getPixel(startx,starty)
	lem = love.graphics.newImage("lemming.png")
end

love.update method

function love.update(dt)
	elapsed = elapsed - dt
	
	if elapsed <= 0 then
		createlem()
		elapsed=lemtime
	end

	for _,test in pairs(Lems )do
		test.update(dt)
	end
end

love.draw method

function love.draw()
	love.graphics.draw(map, 0, 0)

	for _,test in pairs(Lems )do
		love.graphics.draw(lem,test.xpos, test.ypos)
	end
end