I was testing out the tutorial in the love.physic wiki page.
Then I wanted to add friction to the ball so that the ball can slow down naturally when it's on the ground.
So I used Fixture:setFriction() at the ball and tested the program again but the ball didn't seem to slow down naturally(It just kept on moving)
Is setFriction() broken or am I doing something wrong?
The Fixture:setFriction() is at line 19(Inside love.load and inside the block of code that creates the ball)
Code: Select all
function love.load()
love.physics.setMeter(64) --the height of a meter our worlds will be 64px
world = love.physics.newWorld(0, 9.81*64, true) --create a world for the bodies to exist in with horizontal gravity of 0 and vertical gravity of 9.81
objects = {} -- table to hold all our physical objects
--let's create the ground
objects.ground = {}
objects.ground.body = love.physics.newBody(world, 650/2, 650-50/2) --remember, the shape (the rectangle we create next) anchors to the body from its center, so we have to move it to (650/2, 650-50/2)
objects.ground.shape = love.physics.newRectangleShape(650, 50) --make a rectangle with a width of 650 and a height of 50
objects.ground.fixture = love.physics.newFixture(objects.ground.body, objects.ground.shape); --attach shape to body
--let's create a ball
objects.ball = {}
objects.ball.body = love.physics.newBody(world, 650/2, 650/2, "dynamic") --place the body in the center of the world and make it dynamic, so it can move around
objects.ball.shape = love.physics.newCircleShape(20) --the ball's shape has a radius of 20
objects.ball.fixture = love.physics.newFixture(objects.ball.body, objects.ball.shape, 10) -- Attach fixture to body and give it a density of 1.
--objects.ball.fixture:setRestitution(0.9) --let the ball bounce
objects.ball.fixture:setFriction(1) -- Here is the setFriction() which isn't working
--let's create a couple blocks to play around with
objects.block1 = {}
objects.block1.body = love.physics.newBody(world, 200, 550, "dynamic")
objects.block1.shape = love.physics.newRectangleShape(0, 0, 50, 100)
objects.block1.fixture = love.physics.newFixture(objects.block1.body, objects.block1.shape, 5) -- A higher density gives it more mass.
objects.block2 = {}
objects.block2.body = love.physics.newBody(world, 200, 400, "dynamic")
objects.block2.shape = love.physics.newRectangleShape(0, 0, 100, 50)
objects.block2.fixture = love.physics.newFixture(objects.block2.body, objects.block2.shape, 2)
--initial graphics setup
love.graphics.setBackgroundColor(0.41, 0.53, 0.97) --set the background color to a nice blue
love.window.setMode(650, 650) --set the window dimensions to 650 by 650
end
function love.update(dt)
world:update(dt) --this puts the world into motion
--here we are going to create some keyboard events
if love.keyboard.isDown("right") then --press the right arrow key to push the ball to the right
objects.ball.body:applyForce(400, 0)
elseif love.keyboard.isDown("left") then --press the left arrow key to push the ball to the left
objects.ball.body:applyForce(-400, 0)
elseif love.keyboard.isDown("up") then --press the up arrow key to set the ball in the air
objects.ball.body:setPosition(650/2, 650/2)
objects.ball.body:setLinearVelocity(0, 0) --we must set the velocity to zero to prevent a potentially large velocity generated by the change in position
end
end
function love.draw()
love.graphics.setColor(0.28, 0.63, 0.05) -- set the drawing color to green for the ground
love.graphics.polygon("fill", objects.ground.body:getWorldPoints(objects.ground.shape:getPoints())) -- draw a "filled in" polygon using the ground's coordinates
love.graphics.setColor(0.76, 0.18, 0.05) --set the drawing color to red for the ball
love.graphics.circle("fill", objects.ball.body:getX(), objects.ball.body:getY(), objects.ball.shape:getRadius())
love.graphics.setColor(0.20, 0.20, 0.20) -- set the drawing color to grey for the blocks
love.graphics.polygon("fill", objects.block1.body:getWorldPoints(objects.block1.shape:getPoints()))
love.graphics.polygon("fill", objects.block2.body:getWorldPoints(objects.block2.shape:getPoints()))
end