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Posted: **Thu Oct 02, 2014 5:35 pm**

I've been writing a little networking test project for the past few days now, and I decided to use HardonCollider for my collision detection.
I've been using Tiled Map Editor to define a static background image for the level, and then placing polygons for the boundaries in that level. I then wrote a small class that takes Tiled's exported lua file, and creates the proper polygon shapes in HardonCollider.

This all works fine. The issue is when my player actually collides with said polygons, things start to freak out. I originally thought it was because of my collision resolution code (which is admittedly extremely basic), but the curious thing is that the behavior only happens some of the time. In fact, simply closing and re-opening the game is enough to change which polygons act like this.

Here's an example of the wonkyness:

And here is the same set of polygons working after a restart:

My collision resolution code:

Code: Select all

function on_collide(dt, shape_one, shape_two, dx, dy)
	-- print("collide")
	
	local playerCollide = false
	
	if shape_one == player.physics then
		playerCollide = true
	elseif shape_two == player.physics then
		playerCollide = true
	end
	
	if playerCollide and player.moving then
		player.physics:move(0, dy)
		player.physics:move(dx, 0)
		local x, y = player.physics:center()
		player.x = x - (player.width / 2)
		player.y = y - player.height + (player.width / 2)
	end
	
end

And the snippet of code that makes the polygons:

Code: Select all

if object.shape == "polyline" then
	local line = {}
	local linePoints = {}
	
	for k, segment in pairs(object.polyline) do
		table.insert(linePoints, object.x + segment.x)
		table.insert(linePoints, object.y + segment.y)
	end

	line.physics = physics:addPolygon(unpack(linePoints))
	physics:addToGroup("boundries", line.physics)
	
	table.insert(self.boundries, line)
end

I've also attached my .love file. Any help would be greatly appreciated!

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HardonCollider Detection/Resolution Issues

HardonCollider Detection/Resolution Issues