Created
January 5, 2012 20:04
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Save ofTheo/1566967 to your computer and use it in GitHub Desktop.
try this in the shader code of this link: http://notlion.github.com/streetview-stereographic/#o=0.409,-0.207,0.681,0.571&z=1.553&mz=15&p=22.27844,114.16438
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| uniform sampler2D texture; | |
| uniform float scale, aspect, time; | |
| uniform mat3 transform; | |
| varying vec2 v_texcoord; | |
| #define PI 3.141592653589793 | |
| #define PI_2 1.570796326794897 | |
| vec2 tc_offset[9]; | |
| void main(){ | |
| int doEdge = 1; | |
| vec2 rads = vec2(PI * 2., PI); | |
| float x = (v_texcoord.x - .5) * scale; | |
| float y = (v_texcoord.y - .5) * scale * aspect; | |
| // Project to Sphere | |
| vec3 sphere_pnt = vec3( | |
| (2. * x) / (1. + x*x + y*y), | |
| (2. * y) / (1. + x*x + y*y), | |
| (x*x + y*y - 1.) / (1. + x*x + y*y) | |
| ); | |
| sphere_pnt *= transform; | |
| // Convert to Spherical Coordinates | |
| float r = length(sphere_pnt); | |
| float lon = atan(sphere_pnt.y, sphere_pnt.x); | |
| float lat = acos(sphere_pnt.z / r); | |
| if( doEdge == 1 ){ | |
| vec4 sample[9]; | |
| tc_offset[0] = vec2(-1.0, -1.0); | |
| tc_offset[1] = vec2(0.0, -1.0); | |
| tc_offset[2] = vec2(1.0, -1.0); | |
| tc_offset[3] = vec2(-1.0, 0.0); | |
| tc_offset[4] = vec2(0.0, 0.0); | |
| tc_offset[5] = vec2(1.0, 0.0); | |
| tc_offset[6] = vec2(-1.0, 1.0); | |
| tc_offset[7] = vec2(0.0, 1.0); | |
| tc_offset[8] = vec2(1.0, 1.0); | |
| //color2 = texture2D(texture, vec2(lon, lat) / rads); | |
| for(int i = 0; i < 9; i++){ | |
| sample[i] = texture2D(texture, (vec2(lon, lat) / rads) + tc_offset[i] * 0.001); | |
| } | |
| vec4 horizEdge = sample[2] + (2.0*sample[5]) + sample[8] - | |
| (sample[0] + (2.0*sample[3]) + sample[6]); | |
| vec4 vertEdge = sample[0] + (2.0*sample[1]) + sample[2] - | |
| (sample[6] + (2.0*sample[7]) + sample[8]); | |
| vec3 s3 = sqrt((horizEdge.rgb * horizEdge.rgb) + (vertEdge.rgb * vertEdge.rgb)); | |
| float brightness = (s3.r + s3.g + s3.b) / 3.0; | |
| if( brightness > 0.35 ){ | |
| brightness = 0.0; | |
| }else{ | |
| brightness = 1.0; | |
| } | |
| vec4 color = texture2D(texture, vec2(lon, lat) / rads); | |
| color.rgb *= brightness; | |
| gl_FragColor = color; | |
| } | |
| } |
Author
yeah - for sure! that would be so nice to be able to share a modification.
super nice work though!!
Author
oh nice. will you add a permalink button to the project to generate the url?
The URL actually changes every time the shader successfully compiles, so you should be able to just copy it.
Author
oh I didn't notice thats awesome!
btw is it possible to include fullscreen in the url? ( currently if I have a fullscreen view it doesn't save the fullscreen into the url )
sorry for putting the feature requests here :-)
Haha no problem. I had thought about that but wasn't sure if it would be confusing to arrive at the page fullscreen. I suppose it's a good thing to save, though.
Made an issue so I don't forget later..
notlion/streetview-stereographic#1
Author
haha - the proper way to do it :)
…On Jan 9, 2012, at 3:37 PM, Ryan Alexander wrote:
Made an issue so I don't forget later..
notlion/streetview-stereographic#1
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https://gist.github.com/1566967
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Rad! Man, I need to make shaders permalink.