Physics problems.
Posted: Thu Mar 13, 2014 1:56 pm
I've a small program which has an animated character Player { .... } which sets position, speed etc.. and objects.door (shamefully stolen from an example program). However, I'm having issues in allowing my player character to jump on to the door, bump in to the door etc...
My initial thought was that a physics.body would have to be applied to the player{} but this threw back errors (probably down to poor syntax or something)
So would this be the case? That a body needs to be applied to the player? Or am I way off?
Any help or suggestions would be greatly appreciated.
UPDATE Being playing with the code and think I'm closer now than I was before, but still a little confused as to whats going on and why the physics aren't working quite right.
My initial thought was that a physics.body would have to be applied to the player{} but this threw back errors (probably down to poor syntax or something)
So would this be the case? That a body needs to be applied to the player? Or am I way off?
Any help or suggestions would be greatly appreciated.
UPDATE Being playing with the code and think I'm closer now than I was before, but still a little confused as to whats going on and why the physics aren't working quite right.
Code: Select all
-- love 2d 0.8.0
require("AnAL")
function love.load()
--love.graphics.setMode(650, 650, false, true, 0) --set the window dimensions to 650 by 650
door=love.graphics.newImage("door.png")
love.physics.setMeter(64)
world = love.physics.newWorld(0, 29.81*64, true)
player = {}
player.x=400
player.y=450
player.speed = 300
player.y_velocity = 450
player.tim=love.graphics.newImage("tim.png")
player.body= love.physics.newBody(world, player.x,player.y, "dynamic")
player.shape = love.physics.newRectangleShape(0,0,100,50)
player.fixture=love.physics.newFixture(player.body, player.shape);
gravity = 400
jump_height = -300
local imgwalk = love.graphics.newImage("timwalking.png")
local imgwalk1 = love.graphics.newImage("timwalking1.png")
local imgjump = love.graphics.newImage("timjumping.png")
anim = newAnimation(imgwalk, 128.5, 150, 0.08, 0)
anim:setMode("loop")
anim1 = newAnimation(imgwalk1, 128.5, 150, 0.08, 0)
anim1:setMode("loop")
anim2 = newAnimation(imgjump, 128.5, 150, 0.08, 0)
anim2:setMode("bounce")
activeImage = "standing" -- character states
objects = {}
objects.door = {}
objects.door.body = love.physics.newBody(world,50,550) --remember, the shape (the rectangle we create next) anchors to the body from its center, so we have to move it to 300/2, 300-50/2)
objects.door.shape = love.physics.newRectangleShape(0,0,100,100) --make a rectangle with a width of 300 and a height of 50
objects.door.fixture = love.physics.newFixture(objects.door.body, objects.door.shape);
end
function love.update(dt)
world:update(dt)
if player.y_velocity ~= 450 then -- we're probably jumping
player.y = player.y + player.y_velocity * dt -- dt means we wont move at
-- different speeds if the game lags
player.y_velocity = player.y_velocity + gravity * dt
activeImage = "jumping"
anim2:update(dt)
if player.y > 450 then -- we hit the ground again
player.y_velocity = 450
player.y = 450
end
end
if love.keyboard.isDown("right") then
player.x = player.x + (player.speed * dt)
activeImage = "walkingright"
anim:update(dt)
else
activeImage = "standing"
end
if love.keyboard.isDown("left") then
player.x = player.x - (player.speed * dt)
activeImage = "walkingleft"
anim1:update(dt)
end
end
function love.keypressed(key)
if key == " " then
if player.y_velocity == 450 then -- we're probably on the ground, let's jump
player.y_velocity = jump_height
end
end
end
function love.draw()
x, y = objects.door.body:getPosition( )
love.graphics.draw(door,x-50,y-50)
if activeImage == "walkingright" then
love.graphics.print('Walking right', 400, 300)
anim:draw(player.x,player.y)
end
if activeImage == "walkingleft" then
love.graphics.print('Walking left', 400, 300)
anim1:draw(player.x,player.y)
end
if activeImage == "jumping" then
love.graphics.print('Jumping', 400, 300)
anim2:draw(player.x,player.y)
end
if activeImage == "standing" then
love.graphics.print('Standing', 400, 300)
love.graphics.draw(player.tim, player.x, player.y)
end
end
