Slope issues

[AlexsSteel]

Hi,

I have been trying to make a platformer game using LÖVE Physics, almost everything works fine, but i have three questions about slopes:

1º How can I prevent the player from falling off over the slopes?
2º What can I do to detect if the player is over a slope?
3º How can I prevent the player jumping at the top of a slope?

* My english it's really bad, so i attached an image showing the related issue.

[norubal]

How about checking this thread? markgo made good example before, I hope it can help you.
viewtopic.php?f=5&t=12214

[AlexsSteel]

I solved the first and the third question, but i don't know how to solve the second problem.

This code works with the square tiles, but doesn't if the player is on a slope.

Code: Select all

function createPlayer(x, y)
	if #players < 5 then
		local nPlayer = #players+1
		players[nPlayer] = {}
		local body = love.physics.newBody( level, x, y, 'dynamic' )
		local pShape = love.physics.newPolygonShape( 0.25, 0.4, 0.75, 0.4, 1, 0.65, 1, 1.75, 0.75, 2, 0.25, 2, 0, 1.75, 0, 0.65 )
		--body:setGravityScale(0)
		body:setFixedRotation(true)
		local fixture = love.physics.newFixture( body, pShape, 1 )
		fixture:setFriction(0)
		fixture:setRestitution(0)
		local sShape = love.physics.newRectangleShape( 0.26, 1.9, 0.48, 0.5, 0 )
		local sensor = love.physics.newFixture( body, sShape, 1 )
		sensor:setSensor( true )
		sensor:setFriction(0)
		sensor:setRestitution(0)
		body:setMassData( 0.5, 1, 80, 0 )
		players[nPlayer] = { body, pShape, fixture, sensor, false, false, 0, false, 0 }
	end
end

What is the best way to know if a body is colliding with a slope?

function beginContact(a, b)
	if a == players[1][4] or b == players[1][4] then
		players[1][9] = players[1][9] + 1
		players[1][8] = true
	end
end

function endContact(a, b)
	if a == players[1][4] or b == players[1][4] then
		players[1][9] = players[1][9] - 1
			if players[1][9] <= 0 then
				players[1][8] = false
			end
	end
end

[AlexsSteel]

Don't worry, i solved it.

[rmcode]

I found this article on slopes quite helpful:

http://concernedjoe.com/devblog/hardcoding-slopes/

Concerned Joe <3

[Jasoco]

Don't worry, i solved it.

That's not really solving your slope issue. It's creating a workaround to avoid solving the problem.

[s-ol]

Don't worry, i solved it.

That's not really solving your slope issue. It's creating a workaround to avoid solving the problem.

I'd say thats a pretty legit way of doing slopes with box2D