71 lines
1.5 KiB
GLSL
71 lines
1.5 KiB
GLSL
#define T iTime
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#define R iResolution.xy
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#define S(a, b, c) smoothstep(a, b, c)
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#define PI acos(-1.)
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#define CEL rem(R)
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#define LOWRES 320.
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float rem(vec2 iR)
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{
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float slices = floor(iR.y / LOWRES);
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if(slices < 1.){
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return 4.;
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}
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else if(slices == 1.){
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return 6.;
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}
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else if(slices == 2.){
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return 8.;
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}
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else if(slices >= 3.){
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return 10.;
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}
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else if(slices >= 4.){
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return 12.;
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}
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}
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/////////////////////////////////////////////
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// hash2 taken from Dave Hoskins
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// https://www.shadertoy.com/view/4djSRW
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/////////////////////////////////////////////
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float hash2(vec2 p)
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{
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vec3 p3 = fract(vec3(p.xyx) * .2831);
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p3 += dot(p3, p3.yzx + 19.19);
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return fract((p3.x + p3.y) * p3.z);
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}
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/////////////////////////////////////////////
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// NOISE 3D
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// 3D noise and fbm function by Inigo Quilez
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/////////////////////////////////////////////
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mat3 m = mat3( .00, .80, .60,
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-.80, .36, -.48,
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-.60, -.48, .64 );
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float hash( float n )
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{
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float h = fract(sin(n) * 4121.15393);
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return h + .444;
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}
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float noise( in vec3 x )
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{
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vec3 p = floor(x);
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vec3 f = fract(x);
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f = f * f * (3.0 - 2.0 * f );
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float n = p.x + p.y * 157.0 + 113.0 * p.z;
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return mix(mix(mix( hash(n + 00.00), hash(n + 1.000), f.x),
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mix( hash(n + 157.0), hash(n + 158.0), f.x), f.y),
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mix(mix( hash(n + 113.0), hash(n + 114.0), f.x),
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mix( hash(n + 270.0), hash(n + 271.0), f.x), f.y), f.z);
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} |