Movement - move the player AND the world?

[hasen]

I've never made a game before and so I'm not sure how this is all supposed to work. I'm using Tiled with STI and am trying to get the Stalker-X camera to work with it. It seems to work just fine but it's quite apparent that both the world and the player are moving...ie doubling his movement speed. Despite looking fine I imagine this is not the way it should be working.

Code: Select all

function love.draw()
	camera:attach()
	-- Draw map
	love.graphics.setColor(255, 255, 255)
	map:draw(-player.x, -player.y)
  --
	-- -- Draw physics objects
	love.graphics.setColor(255, 0, 255)
	map:box2d_draw(-player.x, -player.y)

	love.graphics.draw(player.img, player.x, player.y, 0, 1, 1, 0, 32)

	camera:detach()
end

If I do it any other way either nothing moves or the map doesn't move at all etc.

[Schwender.exe]

from what I see it might be because you're drawing the map at player.x,player.y instead of 0,0

[hasen]

Ok but then the player moves but the map doesn't...?

Code: Select all

map:draw(0, 0)

[Tjakka5]

Are you following the player with the camera?

Code: Select all

function love.update(dt)
    camera:update(dt)
    camera:follow(player.x, player.y)
end

[hasen]

Yeah of course.

Code: Select all

function love.update(dt)
	world:update(dt)
	map:update(dt)
	camera:update(dt)
	camera:follow(player.x, player.y)
	-- Move map
	local kd = love.keyboard.isDown
	local l  = kd("left")  or kd("a")
	local r  = kd("right") or kd("d")

	player.x = l and player.x - player.speed * dt or player.x
	player.x = r and player.x + player.speed * dt or player.x

end

[erasio]

STI doesn't work well with other cameras.

It calls love.graphics.origin before drawing anything meaning any effect applied beforehand (location, scale or rotation) is completely ignored.

While it does handle everything for you in regards to drawing, it's very limited in how it can draw the environment.

In other words. It can only work without rotation and you have to supply the appropriate translation yourself as parameters.

It is intended that you move both the player and the world. This should have no effect on the speed or visuals.

I'm guessing you've been scaling with your camera which would explain the speed differences.

Edit: So you can use a camera. But you are more limited and need to make sure to not use the player location but the camera location as parameter for STI maps. Since that's what you expect to draw.

[hasen]

STI doesn't work with other cameras.

It calls love.graphics.origin before drawing anything meaning any effect applied beforehand (location, scale or rotation) is completely ignored.

While it does handle everything for you in regards to drawing, it's very limited in how it can draw the environment.

In other words. It can only work without rotation or scaling and you have to supply the appropriate translation yourself.

It is intended that you move both the player and the world. This should have no effect on the speed or visuals.

I'm guessing you've been scaling with your camera which would explain the speed differences.

Edit: So you can use a camera. But you are more limited and need to make sure to not use the player location but the camera location as parameter for STI maps. Since that's what you expect to draw.

OK I see, that explains a lot then. I thought I was just doing it all wrong. But I thought normally people use STI with Tiled? At least I noticed Tiled is extremely popular. I want to use that camera so what should I use with Tiled? Thanks for your help.

[erasio]

OK I see, that explains a lot then. I thought I was just doing it all wrong. But I thought normally people use STI with Tiled? At least I noticed Tiled is extremely popular. I want to use that camera so what should I use with Tiled? Thanks for your help.

Truth be told. I have no idea.

Never looked closely enough at tiled. I tried removing graphics.origin() but it kinda broke for no reason I understood at that time and I just dealt with that limitation (and added scaling myself which was just extra parameters to love.draw and some extra code)

[hasen]

OK I see, that explains a lot then. I thought I was just doing it all wrong. But I thought normally people use STI with Tiled? At least I noticed Tiled is extremely popular. I want to use that camera so what should I use with Tiled? Thanks for your help.

Trust be told. I have no idea.

Never looked closely enough at tiled. I tried removing graphics.origin() but it kinda broke for no reason I understood at that time and I just dealt with that limitation (and added scaling myself which was just extra parameters to love.draw and some extra code)

Hmm I see. So you do the levels in code? I wouldn't know how to do that. But it seems many people use Tiled with Love2d still though.

[erasio]

Once I fixed the scaling and simply didn't use rotation.

Other times I implemented my own tile or chunk system which i did write my own map formats for. (Well one was picture based with color codes)