They are using a 3d source in the example of your link. It looks like a side by side texture containing the left and right eye images. The line "tex.x = tex.x +0.5" after the first sample is taken switches to the second image on the same texture to take the right eye's sample.
As Alexander said you will need to render the scene twice from two different positions to make it work. ----- Ursprüngliche Nachricht ----- Von: AndreaZzZ Gesendet: 09.11.10 19:51 Uhr An: Discussion of Half-Life Programming Betreff: Re: [hlcoders] Anaglyph Shaders DBViewer users say it works ( http://www.dvbviewer.tv/forum/topic/40858-3d-anaglyph-shader/) 2010/11/9 Alexander Hirsch <1ze...@googlemail.com> > That's not even how anaglyph images work. If you look at that through > your colored glasses you won't see a depth effect. > You need to render the scene twice, once with a camera moved a little > to the left and rotated to the right, and once with one moved a little > to the right and rotated to the left. > The amount of rotation defines the focal point; the rotation is > important and in your current shader it is not present. > Then you combine the red-channel of the left with the blue and green > channel of the right image to the final color. > > On Tue, Nov 9, 2010 at 6:27 PM, Joel R. <joelru...@gmail.com> wrote: > > You could go cheap and just add a frame around the edges to hide the ugly > > parts. > > > > On Tue, Nov 9, 2010 at 11:17 AM, AndreaZzZ <andrea_s...@mail.ru> wrote: > > > >> Coding will solve this problem... > >> > >> 2010/11/9 Joel R. <joelru...@gmail.com> > >> > >> > If you go outside of the 0.0 -> 1.0 range it will be capped to 0.0 or > >> 1.0. > >> > I can't think of a way to fix that problem, since it would require > >> > rendering > >> > a bigger view than the users resolution. > >> > > >> > On Tue, Nov 9, 2010 at 10:21 AM, AndreaZzZ <andrea_s...@mail.ru> > wrote: > >> > > >> > > Thanks, I did it. But there is a problem - > >> > > http://img130.imageshack.us/img130/6206/testhardware0017.jpg (look > at > >> > the > >> > > rocks) > >> > > > >> > > 2010/11/9 Joel R. <joelru...@gmail.com> > >> > > > >> > > > HALF2 has the .x and .y properties. So just do something like > HALF2 > >> > > > leftCoord = ZeroTexCoord; leftCoord.x += left_pos; Then sample the > >> > color > >> > > at > >> > > > the new coordinate. However you should note, that the color you > will > >> > be > >> > > > returning in that function will be for the original pixel > location. > >> > > > Shaders > >> > > > go from Top left corner to Top Right Corner and repeats until it > >> > reaches > >> > > > the > >> > > > bottom most row. > >> > > > > >> > > > This means you'll have to work in reverse by sampling left or > right > >> > > towards > >> > > > the "original" pixel, instead of working from the original pixel > >> > outward. > >> > > > It > >> > > > would also be best to use different shader passes for each blue > and > >> red > >> > > of > >> > > > the anaglyph. > >> > > > > >> > > > On Tue, Nov 9, 2010 at 8:34 AM, AndreaZzZ <andrea_s...@mail.ru> > >> wrote: > >> > > > > >> > > > > I'm currently doing anaglyph. How to move left and right along > the > >> x > >> > > > axis, > >> > > > > my shader moves along the axes xy as correct? > >> > > > > Code: > >> > > > > > >> > > > > sampler BaseTextureSampler : register( s0 ); > >> > > > > > >> > > > > HALF4 main( HALF2 ZeroTexCoord : TEXCOORD0 ) : COLOR > >> > > > > { > >> > > > > float left_pos = 0.008; > >> > > > > float right_pos = -0.008; > >> > > > > > >> > > > > float4 left = tex2D(BaseTextureSampler, ZeroTexCoord + > left_pos); > >> > > > > float4 right = tex2D(BaseTextureSampler, ZeroTexCoord + > right_pos); > >> > > > > > >> > > > > float r = 0.7*left.g + 0.3*left.b; > >> > > > > float g = 1*right.g; > >> > > > > float b = 1*right.b; > >> > > > > > >> > > > > return float4(r, g, b, 1); > >> > > > > } > >> > > > > > >> > > > > > >> > > > > Sorry for my English because English isn't my native language. > >> > > > > _______________________________________________ > >> > > > > To unsubscribe, edit your list preferences, or view the list > >> > archives, > >> > > > > please visit: > >> > > > > http://list.valvesoftware.com/mailman/listinfo/hlcoders > >> > > > > > >> > > > > > >> > > > _______________________________________________ > >> > > > To unsubscribe, edit your list preferences, or view the list > >> archives, > >> > > > please visit: > >> > > > http://list.valvesoftware.com/mailman/listinfo/hlcoders > >> > > > > >> > > > > >> > > _______________________________________________ > >> > > To unsubscribe, edit your list preferences, or view the list > archives, > >> > > please visit: > >> > > http://list.valvesoftware.com/mailman/listinfo/hlcoders > >> > > > >> > > > >> > _______________________________________________ > >> > To unsubscribe, edit your list preferences, or view the list archives, > >> > please visit: > >> > http://list.valvesoftware.com/mailman/listinfo/hlcoders > >> > > >> > > >> _______________________________________________ > >> To unsubscribe, edit your list preferences, or view the list archives, > >> please visit: > >> http://list.valvesoftware.com/mailman/listinfo/hlcoders > >> > >> > > _______________________________________________ > > To unsubscribe, edit your list preferences, or view the list archives, > please visit: > > http://list.valvesoftware.com/mailman/listinfo/hlcoders > > > > > > _______________________________________________ > To unsubscribe, edit your list preferences, or view the list archives, > please visit: > http://list.valvesoftware.com/mailman/listinfo/hlcoders > > _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlcoders _______________________________________________ To unsubscribe, edit your list preferences, or view the list archives, please visit: http://list.valvesoftware.com/mailman/listinfo/hlcoders
