Make stuff big. Really big.

[deps]

Hello, found out about SFML not long ago and is trying it out.
I love the ruby language and was happy I found a promising graphics library for it.
Using the prebuilt windows Ruby package, and I have a couple of questions.

First, How can I set up the projection matrix, or whatever it is called, to make the resolution 160x120, and still keep the window size as 640x480.
I tried something like this, but is having some problems.

Code: [Select]

# The graphics mode we want to use
mode = VideoMode.new( 640,480, 32)
# Open up a window
win = RenderWindow.new( mode, "My test", 0 )
# Set up a view
view = View.new( FloatRect.new(0,0,160,120) )

For some reason sprites isn't getting scaled.
I draw them using   win.draw( my_sprite ) and its drawn at the top left, and in its original size.

It also looks a bit blury. (Most likely because of subpixel accuracy or mipmapping or something. I'm not so good at this hardware accelerated thingys )

Would really appreciate some help.

If needed, here's what I have at the moment. It's not much but I have only been working on it for an hour or so.

Code: [Select]

require 'RubySFML'
include SFML


# The graphics mode we want to use
mode = VideoMode.new( 640,480, 32)

# Open up a window
win = RenderWindow.new( mode, "My test", 0 )

# Set up a view
view = View.new( FloatRect.new(0,0,160,120) )

# Misc settings
win.showMouseCursor( false )
win.useVerticalSync( true )


# Load images

tiles_gfx = Image.new("tiles.png")
tiles = Sprite.new( tiles_gfx )


# Main loop
done = false
while !done

while e = win.getEvent()
done = true if e.type == Event::Closed or
(e.type == Event::KeyReleased and e.code == Key::Escape)
end

# GFX
win.draw( tiles )

  win.display()
sleep(0.01)
end


Thank you

[Laurent]

Looks like you missed the main call :

Code: [Select]

win.setView(view)

[deps]

Uhm... Never mind that. Was just checking if you guys were awake.  :oops:

How about the blurriness of the sprites? Can I some how turn off the mipmapping/texturefilter/whateveritis that is causing it? I'm going to try to get some retro feel to it so I want nice crisp pixels.

[Laurent]

Try that :

Code: [Select]

tiles_gfx.setSmooth( false )

[deps]

Excellent! Will try this out as soon as I get off from work!

Thanks a lot!  

[deps]

Works just great.

Got a new little problem...

I have a lot of tiles in one texture and only wants to draw one at a time instead of the whole image. After some digging around in the docs I came up with this. But the result is a bit wrong.

The left one is the one produced by SFML, the right one is what I was expecting.
As you can see, the left one only got half of the edge pixels drawn.

The relevant code used:

Code: [Select]


tiles_gfx = Image.new("tiles.png")
tiles_gfx.setSmooth( false )
tiles = Sprite.new( tiles_gfx )

# ... later in the source

tiles.setSubRect( IntRect.new(0,0,8,8) )
win.draw( tiles )


[acrin1]

Works just great.

Got a new little problem...

I have a lot of tiles in one texture and only wants to draw one at a time instead of the whole image. After some digging around in the docs I came up with this. But the result is a bit wrong.

The left one is the one produced by SFML, the right one is what I was expecting.
As you can see, the left one only got half of the edge pixels drawn.

The relevant code used:

Code: [Select]


tiles_gfx = Image.new("tiles.png")
tiles_gfx.setSmooth( false )
tiles = Sprite.new( tiles_gfx )

# ... later in the source

tiles.setSubRect( IntRect.new(0,0,8,8) )
win.draw( tiles )


Assuming that you're trying to set a rectangle of 8 x 8 pixels should your rectangle be 0,0,7,7? I'm doing the same in one of my projects and this seems to work fine (for a 32x32 image):

Tile.SetSubRect(sf::IntRect(tileX, tileY , (tileX+32), (tileY+32)));

[deps]

Well. Yes.
How stupid of me.
Thanks.