bitlair/ledbanner-shaders
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Add WIP shaders

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polyfloyd 2018-05-19 17:23:49 +02:00
parent 07d6d1dee5
commit ae07b0daf8
27 changed files with 3172 additions and 0 deletions
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30
feather-field.glsl Normal file
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@ -0,0 +1,30 @@
//#define col(i) vec4( vec3(C[i]), 1 )
//#define col(i) vec4( .6 + .6 * cos(l-iTime+float(i) +vec3(0,23,21) ), 1 ) // colored
#define col(i) vec4( ( .6 + .6 * cos(l-iTime+float(i) +vec3(0,23,21) ) )*C[i], 1 ) // + border
#define blend(i) O += (1.-O.a) * col(i) * C[i]
void mainImage( out vec4 O, vec2 U )
{
vec2 R = iResolution.xy;
U = (U+U-R)/R.y;
O -= O;
float a = atan(U.y,U.x), l = length(U);
l = 2.*l; a = 30.*a/6.28;
vec4 s = l-vec4(0,0,.5,.5),
A = fract( a-vec4(.25,.75,0,.5) )-.5, L = fract(s-iTime) - .5, // 4 overlapping polar tilings
r = sqrt(A*A*abs(s) + L*L), // ellipse (s*s would be const width)
C = smoothstep(.1,0., r-.3); // 4 feathers mask
int c = 2* int( L.z > L.x ); // sort ranks
ivec2 T = ivec2( A[1+c] > A[0+c], A[1+2-c] > A[0+2-c] ); // sort rows
blend( T.x + c ); // blend by sorted order
blend( 1-T.x + c );
blend( T.y + 2-c );
blend( 1-T.y + 2-c );
}
// https://www.shadertoy.com/view/XljBRh