Why smoothing doesn't work?

nowolfer

When i playing with 01_Object tutorial, i have turn on very smoothing flag display object graphics, but when doing rotate it doesn't work, any idea?

jim

Can you please post a screenshot of what your are getting ?

iarwain

If you append this to the end of 01_Object.ini, you should be able to compare them side by side (and press space to take a screenshot):

[MainInput]
KEY_SPACE = Screenshot

[Screenshot]
Extension = png

[Object]
Graphic   =
ChildList = O1 # O2 # T1 # T2
TrackList = T

[T]
0         = > Input.IsActive Screenshot # EvalIf < "Screenshot.Capture"
Loop      = true

[O1]
Graphic         = Graphic
Smoothing       = true
Position        = (-200, 0, 0)
AngularVelocity = 90
Scale           = 1.5

[O2@O1]
Smoothing       = false
Position        = (200, 0, 0)

[T1]
Graphic         = @
Pivot           = center top
Text            = @
String          = Smoothing = true
Position        = (-200, 200, 0)

[T2@T1]
String          = Smoothing = false
Position        = (200, 200, 0)

nowolfer

; orx - Tutorial config file
; Should be used with orx v.1.4+

[Display]
;ScreenWidth = 1366
;ScreenHeight = 768
ScreenWidth = 800
ScreenHeight = 600
Title = SharpDawn
;FullScreen =true
;Smoothing =true
;DepthBuffer =true

[Input]
SetList = MainInput

[MainInput]
KEY_ESCAPE = Quit
KEY_SPACE = Screenshot

[Render]
;nFrequency = <float>
ShowFPS = true
;ShowProfiler = true
;onsoleColor = <vector>

[Viewport]
Camera = Camera
;RelativePosition = bottom right
;Position = (100, 100, 0); NB: Position is in pixels and will be ignored if RelativePosition is specified
;RelativeSize = (0.5, 0.5, 0.0)
;Size = (200, 150, 0) NB: Size is in pixels and will be ignored if RelativeSize is specified
;BackgroundColor = (255, 180, 0)

[Camera]
; We use the same size for the camera than our display on screen so as to obtain a 1:1 ratio
FrustumWidth = @Display.ScreenWidth
FrustumHeight = @Display.ScreenHeight
;FrustumWidth = 2000
;FrustumHeight = 300
FrustumFar = 1.0
FrustumNear = 0.0
Position = (0.0, 0.0, -1.0)
;Zoom = 0.9
;Rotation = 35

[Object]
Graphic = Graphic
;AutoScroll = x
;Color = (255, 0, 200)
;Alpha = 0.4
;Flip = both
;Position = (100.0, 200.0, 0.0)
Rotation = 30
;Scale = (3.0, 1.0, 1.0) NB: z is ignored for 2D objects
;Smoothing = true
;BlendMode = add
;AngularVelocity = 1800
Speed = (0, 0, 0)
TrackList = T


[Text]
String = Why should we use a texture when we can use a text?!

[Graphic]
Texture = ../data/object/bg.jpg
;Text = Text; <= If you want to see the text, you need to comment out the texture
Pivot = center
;TextureCorner = (50, 20, 0) NB: z is ignored
;TextureSize = (50, 80, 0) NB: z is ignored
;Repeat = (3.0, 2.0, 0.0)
;Flip = both
;Color = (0, 0, 255)
;Alpha = 0.6
Smoothing = true

[Screenshot]
Extension = png


[T]
0 = > Input.IsActive Screenshot # EvalIf < "Screenshot.Capture"
Loop = true

nowolfer

This is what i play with the tutorial, when rotate the edge of the picture seems no smooth as expect with wrong config?

jim

That's very known issue while rotating square texture with no alpha border, try to insert a border of alpha pixel or transparent pixel in your image using photoshop or gimp. This would smoothen the edge a lot. So if you image size is 16x16, make it 17x17 with transparent pixel around the border.

edit : 17x17 wont work for 16x16 image, you need 18x18, 1 pixel on each side of your image

iarwain

Ah I see from where the confusion is coming.
The smoothing attribute corresponds to texture filtering (ie. hardware interpolation done inside the texture surface while sampling), not to anti-aliasing.

You can use Jim's trick in order to get less rough edges (ie. having filtering on those extra rows of pixels) or you can integrate any anti-aliasing technique that would work for you, such as FXAA (which is a post-processing shader).