Foreground/Background Scrolling Implementation

[The Burrito]

I use the full physics engine or AABB collision for most of my tests / demos, but you probably want something in between. Take a look at Hardon Collider if you haven't already, it's pretty good.

If you aren't planning on having much else you could write some kind of simple slope handler thing that prevents the player from ever being below the slope, but that will be kind of a waste if you're going to eventually include platforms or something and have to do collision checks for those too.

[verilog]

I see, let me expand on my "slope-collision" idea a bit to see if the results are good enough. I'll make sure to check out Hardon Collider, though, thanks for the heads up!

[MarekkPie]

I don't know what your theory is, but most of the time for non-AABB collisions people use the separating axis theorem. Here is a VERY detailed explanation of it, though there is no code to see what is going on.

That said, both Box2D (and it looks like HardonCollider as well) use SAT if you don't want to melt your brain.

[AntonioModer]

LOVE 0.8.0 background scrolling

Code: Select all

camera = {}
camera.x = 0;
camera.y = 0;
--== BACKGROUND ==--
-- Setup --
backgr = {};
backgr.image = love.graphics.newImage("image.png");
backgr.imageSize = backgr.image:getWidth();
backgr.spriteBatch = love.graphics.newSpriteBatch(backgr.image, 9);	-- =9 if screen=640x480, backgr.imageSize=512 !!!

function drawBackground()
	love.graphics.setColor(255,255,255,255)
	local floor, backgr, camera = math.floor, backgr, camera;
	backgr.spriteBatch:clear()
	backgr.spriteBatch:bind()	
	for x = floor((camera.x-(love.graphics.getWidth()/2)+0)/backgr.imageSize), 
                         floor((camera.x+(love.graphics.getWidth()/2)-0)/backgr.imageSize) do
		for y = floor((camera.y-(love.graphics.getHeight()/2)+0)/backgr.imageSize), 
                                       floor((camera.y+(love.graphics.getHeight()/2)-0)/backgr.imageSize) do
			backgr.spriteBatch:add(x*backgr.imageSize, y*backgr.imageSize)
		end
	end
	backgr.spriteBatch:unbind()
	love.graphics.draw(backgr.spriteBatch,0,0);
end