jumping tutorial?

[com_1]

Maybe I can help you ?
I am here not so long ago, but in the programming of years.

Exactly what you want to do ?

[toaster468]

i am having problems with loading pictures right now
take a look at page 2 i posted my problems there

[com_1]

Try this code.

Code: Select all

function love.load()
image = love.graphics.newImage("X.png");
end

function love.draw()
love.graphics.draw(image, 10, 10, 0, 1, 1, 0, 0);
end

[Ryne]

what i have right now:

Code: Select all

-- Office Man Stan --



function love.load()

	love.graphics.setMode(320, 320)
	love.graphics.setCaption( "Office Man Stan" )

	stan = love.graphics.newImage( "img/P.PNG" )
	ground = love.graphics.newImage( "img/X.PNG" )


end


function love.update(dt)

end

function love.draw()

	love.graphics.draw( stan, 50, 50 )
	love.graphics.draw( ground, 0, 240 )
	
end

but it works when i am only calling 1 picture

It shouldnt.

You dont have your images in an "img" directory. You could try either putting the images in a folder called "img" or removing "img/" from your sources and keep the images as they are, in the root of the program.

EDIT

Sorry, Didn't realize there was another page to this thread, it seems the question was already answered.

[com_1]

Happened or not ?

And where are you now ?

[kikito]

Do they have exactly the same name? Including lowercase and uppercase letters, as well as the extension? (billy.JPG is not the same as billy.jpg) .

If you don't find the issue, paste your code here with a screenshot of your game folder with the images.

EDIT: also, I'd advise you to configure the windows explorer so it shows file extensions on the file names. If I remember correctly, it tells you that your 'png' and 'PNG' files are all of type 'PNG' so you might not see the error.

And yes, if you don't have an img folder inside your game folder, you should not add it on the code.

[toaster468]

WOO! It works thanks a bunch guys!

Alright now onto the rest of my lesson, what is the next step?

[TechnoCat]

I would look over these two tutorials next before trying to implement a jump.
http://love2d.org/wiki/Tutorial:Hamster_Ball
http://love2d.org/wiki/Tutorial:Callback_Functions (at minimum look over love.load, love.update, and love.draw)
If you can do hamster ball and understand what is going on, getting a jump working would probably be next.

[kikito]

WOO! It works thanks a bunch guys!

Alright now onto the rest of my lesson, what is the next step?

Next step is: make your character move left and right when you press keys left and right on the keyboard.

In order to do that, you will have to:

• Start by storing the x coordinate of your character on a variable. Call it player_x. You can initialize it inside love.load.
• Use love.keypressed to increment/decrement the player_x
• Use the player_x variable to draw your character instead of having a fixed x.

For bonus points, consider change the character graphic depending on whether it is moving left and right.

Don't try do do animations yet.

[zac352]

I'll write a simple example... Nah. I'll write half a game.

Code: Select all

local player={} --where we put our variables
player.x=0
player.y=0
player.vx=0
player.vy=0
player.img=love.graphics.newImage("myPlayer.png") --player image
camerax=0 --scrolling!
cameray=0
lastjump=0 --when they last jumped

objects={}
for i=1,20 do --populate with bricks
table.insert(objects,{
x=i,y=0
})
end

function boxCollide(x1,y1,w1,h1, x2,y2,w2,h2) --this could easily be revised to check where they're intercepting.
local h,v=false,false --collision variables
if x2>x1 and x2<x1+w1 then --collision on x
h=true
end
if y2>y1 and y2<y1+h1 then
v=true
end
x2,y2=x2+w2,y2+h2
if x2>x1 and x2<x1+w1 then --collision on x
h=true
end
if y2>y1 and y2<y1+h1 then
v=true
end
return h,v --send them back to caller
end

function love.load() --stuff
end

function love.update(dt) --update player
player.x=player.x+player.vx --add velocity
player.y=player.y+player.vy
player.vy=player.vy-.3*dt --add coefficient of gravity
px,py=player.x,player.y
pw,ph=1,2 --we're multiplying by 16, so our player is 16x32
local h,v
for i=1,#objects do
local lh,lv=boxCollide(objects[i].x,objects[i].y,1,1, px,py,pw,ph) --check between box and player
h=h or lh --if h is false (nil), h=true
v=v or lv --if v is false (nil), v=true
end
if love.keyboard.isDown("left") then
player.vx=-1 --move left
end
if love.keyboard.isDown("right") then
player.vx=1 --move right
end
if h then --they slammed into a wall
player.vx=0
end
if v then --they slammed into the floor or ceiling
player.vy=0
end
end

function love.draw()
love.graphics.setBackgroundColor(0x00,0x00,0xff) --#0000ff = blue
love.graphics.setColor(0xff,0xff,0xff) --#ffffff = white
love.graphics.translate(-camerax,-cameray) --subtracts camera's pos automatically
love.graphics.scale(16,16) --make everything scaled 16x
love.graphics.draw(player.img,player.x,player.y) --draw our player
for i=1,#objects do
love.graphics.rectangle(objects[i].x,objects[i].y,1,1) --draw a 1x1 (16x16) box at x,y
end
end

function love.keypressed(k) --when someone presses a key
if k==" " and love.timer.getTime()-lastjumped<1 then --spacebar was pressed and player jumped more than 1 second ago
player.vy=player.vy+10 --superhuman jump!
lastjump=love.timer.getTime()
end
end