General

Re: Anti-alias seems does not work

Shawn Hargreaves — Tue, 31 Mar 2009 17:18:00 GMT

Scyde:
And is there a way to make a postprocess with multisampling?

Sure. Make a mutlisampled rendertarget, draw your scene to it, then apply the postprocess. This works the same regardless of whether you are multisampling or not, it all just depends on whether you create the rendertarget with multisampling or not.

Re: Anti-alias seems does not work

Scyde — Tue, 31 Mar 2009 07:21:33 GMT

And is there a way to make a postprocess with multisampling?

Re: Anti-alias seems does not work

MJP — Thu, 20 Nov 2008 19:07:36 GMT

Like Shawn mentioned changing the presentation parameters after you've created the device will have no effect. You'd have to reset the device using the new parameters for them to take effect.

Also, I know of no GPU that supports 16 sub-samples for multisampling. For example the mode names "16x" that you see on Nvidia's 8000 and 9000 series actually uses 4 samples, with a quality level of "2" IIRC. The most those GPU's support is 8 sub-samples, which corresponds to the "8xQ" and "16xQ" settings.

Re: Anti-alias seems does not work

gborges — Thu, 20 Nov 2008 18:29:40 GMT

Jim Perry:
Why do you say it doesn't seem to work?

Because the objects are not build as they could be if the antialias were turned on.

Re: Anti-alias seems does not work

Shawn Hargreaves — Thu, 20 Nov 2008 16:41:59 GMT

That's not how you turn on multisampling. You specify this in the parameters when you create the device. You can't (at least not easily) change it afterward.

Re: Anti-alias seems does not work

Jim Perry — Thu, 20 Nov 2008 15:48:32 GMT

Why do you say it doesn't seem to work?

Anti-alias seems does not work

gborges — Thu, 20 Nov 2008 15:18:39 GMT

Hi all!

What is wrong with the code which I try to turn on the anti-alias feature? (using c# 2008 and XNA 3.0)

    
                        graphicsDevice = new GraphicsDevice(GraphicsAdapter.DefaultAdapter, 
        
                                                            DeviceType.Hardware, 
        
                                                            windowHandle, 
        
                                                            parameters); 
        
                        //Antialias 
        
                        graphicsDevice.RenderState.MultiSampleAntiAlias = true; 
        
                        graphicsDevice.PresentationParameters.MultiSampleType = 
        
                                MultiSampleType.SixteenSamples; 
        
                        graphicsDevice.PresentationParameters.MultiSampleQuality = 8;

Thank you in advance.