Tile Collision Problem

[XCaptain]

I've been trying to make a character that can freely move around a tile map (non-gridlocked). I can get the collision detection to work, but if the player isn't moving one tile then there's a gap between the player and the tile.

yr9OGQw.jpg (3.86 KiB) Viewed 143 times

This error only happens when going up or left. Here's the code I'm using to handle player movement:

Code: Select all

local player = {}

function player:load()
	self.x = 0
	self.y = 0
	self.h = 32
	self.w = 32
	self.mode = 'fill'
	self.speed = 64
	self.o = -1
	self.map = {}
end

function player:setPos(x,y)
	self.x = x
	self.y = y
end

function player:getPos()
	return self.x, self.y
end

function player:setMap(map,current)
	self.map = map[current]
end

function player:draw()
	love.graphics.setColor(0,186,186)
	love.graphics.rectangle(self.mode, (self.x + self.o) * 32, (self.y + self.o)* 32, self.h, self.w)
end

function player:update(dt)
	if love.keyboard.isDown('d') and self.map[math.floor(self.x) + 1][math.floor(self.y)] ~= "wall" then
		self.x = self.x + 0.5
	end
	if love.keyboard.isDown('a') and self.map[math.floor(self.x) - 1][math.floor(self.y)] ~= "wall" then
		self.x = self.x - 0.5
	end
	if love.keyboard.isDown('w') and self.map[math.floor(self.x)][math.floor(self.y) - 1] ~= "wall" then
		self.y = self.y - 0.5
	end
	if love.keyboard.isDown('s') and self.map[math.floor(self.x)][math.floor(self.y) + 1] ~= "wall" then
		self.y = self.y + 0.5
	end
end

function player:nextTile()
	
end

return player

Is there a way to avoid this?

[Robin]

How about:

Code: Select all

   if love.keyboard.isDown('a') and self.map[math.floor(self.x - 0.5)][math.floor(self.y)] ~= "wall" then

(and the same change for going up)

By the way, you're not using dt. That's generally not what you want.

[XCaptain]

How about:

Code: Select all

   if love.keyboard.isDown('a') and self.map[math.floor(self.x - 0.5)][math.floor(self.y)] ~= "wall" then

(and the same change for going up)

By the way, you're not using dt. That's generally not what you want.

Thanks for the help!
Although I still don't understand why on up and left were effected?

[Robin]

Because the (x, y) coordinates refer to the upper-left corner of things. That means there is a slightly different formula for the bottom and the right, and the one you already had worked.