チラ裏 のバックアップの現在との差分(No.1)

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#define HEADER_DIR foo
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#define AE_INCLUDE_PATH(x) <x>
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#include AE_INCLUDE_PATH(HEADER_DIR/hoge.hpp)
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#spanend
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//note: normalized rand, [0;1[
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float nhash21( vec2 n )
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{
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  return fract(sin(dot(n.xy, vec2(12.9898, 78.233)))* 43758.5453);
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}
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#spanend
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vec2 nhash22( vec2 n )
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{
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  return fract(sin(dot(n.xy, vec2(12.9898, 78.233)))* vec2(43758.5453,35458.5734));
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}
#spanend
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vec2 shash22( vec2 p )
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{
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    return nhash22(p)*2.0-1.0;
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}
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//note: [-1;1]
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//note: honestly stolen from iq: https://www.shadertoy.com/view/Xsl3Dl
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vec3 nhash33( vec3 p )
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{
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    p = vec3( dot(p,vec3(127.1,311.7, 74.7)),
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              dot(p,vec3(269.5,183.3,246.1)),
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              dot(p,vec3(113.5,271.9,124.6)));
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    return fract(sin(p)*43758.5453123);
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}
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vec3 shash33( vec3 p )
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{
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    return -1.0+2.0*nhash33(p);
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}
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vec2 smootherstep( vec2 t )
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{
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    return t*t*t*(t*(t*6.0-15.0)+10.0);
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}
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//note: value noise
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float nhash11( float n )
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{
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    return fract(sin(n)*43758.5453);
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}
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float nvnoise21( vec2 x )
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{
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    vec2 p = floor(x);
    vec2 f = fract(x);
    f = smoothstep(0.0,1.0,f);
    float n = p.x + p.y*57.0;
    float res = mix( mix( nhash11(n+  0.0), nhash11(n+  1.0),f.x),
                     mix( nhash11(n+ 57.0), nhash11(n+ 58.0),f.x), f.y);
    return res;
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}
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float nfbm21( vec2 p )
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{
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    mat2 m = mat2( 0.80,  0.60, -0.60,  0.80 );
    float f = 0.0;
    f += 0.50000*nvnoise21( p ); p = m*p*2.02;
    f += 0.25000*nvnoise21( p ); p = m*p*2.03;
    f += 0.12500*nvnoise21( p ); p = m*p*2.01;
    f += 0.06250*nvnoise21( p ); p = m*p*2.04;
    f += 0.03125*nvnoise21( p );
    return f / (0.5+0.25+0.125+0.06250+0.03125);
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}
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//note: gradient noise
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float sgnoise21( vec2 p )
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{
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    vec2 i = floor( p );
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    vec2 f = fract( p );
    vec2 u = smoothstep( 0.0, 1.0, f );
    //vec2 u = smootherstep( f );
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    //return dot( f-vec2(1.0,0.0), vec2(0.5,0.5) );
    //return dot( shash22( i + vec2(1.0,0.0) ), f - vec2(1.0,0.0) );
    
   return mix( mix( dot( shash22( i + vec2(0.0,0.0) ), f - vec2(0.0,0.0) ),
                    dot( shash22( i + vec2(1.0,0.0) ), f - vec2(1.0,0.0) ), u.x),
               mix( dot( shash22( i + vec2(0.0,1.0) ), f - vec2(0.0,1.0) ), 
                    dot( shash22( i + vec2(1.0,1.0) ), f - vec2(1.0,1.0) ), u.x), u.y);
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}
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float ngnoise21( vec2 p )
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{
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    return 0.5 + 0.5 * sgnoise21( p );
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}
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//note: [-1;1]
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float sgnoise31( in vec3 p )
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{
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   vec3 i = floor( p );
   vec3 f = fract( p );
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    vec3 u = f*f*(3.0-2.0*f);
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   return mix( mix( mix( dot( shash33( i + vec3(0.0,0.0,0.0) ), f - vec3(0.0,0.0,0.0) ), 
                         dot( shash33( i + vec3(1.0,0.0,0.0) ), f - vec3(1.0,0.0,0.0) ), u.x),
                    mix( dot( shash33( i + vec3(0.0,1.0,0.0) ), f - vec3(0.0,1.0,0.0) ), 
                         dot( shash33( i + vec3(1.0,1.0,0.0) ), f - vec3(1.0,1.0,0.0) ), u.x), u.y),
               mix( mix( dot( shash33( i + vec3(0.0,0.0,1.0) ), f - vec3(0.0,0.0,1.0) ), 
                         dot( shash33( i + vec3(1.0,0.0,1.0) ), f - vec3(1.0,0.0,1.0) ), u.x),
                    mix( dot( shash33( i + vec3(0.0,1.0,1.0) ), f - vec3(0.0,1.0,1.0) ), 
                         dot( shash33( i + vec3(1.0,1.0,1.0) ), f - vec3(1.0,1.0,1.0) ), u.x), u.y), u.z );
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}
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float ngnoise31( in vec3 p )
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{
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    return 0.5 + 0.5 * sgnoise31( p );
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}
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float nfbm31( vec3 q )
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{
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    const mat3 m = mat3( 0.00,  0.80,  0.60,
                    -0.80,  0.36, -0.48,
                    -0.60, -0.48,  0.64 );
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    float f = 0.0;
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    f  = 0.5000*ngnoise31( q ); q = m*q*2.01;
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    f += 0.2500*ngnoise31( q ); q = m*q*2.02;
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    f += 0.1250*ngnoise31( q ); q = m*q*2.03;
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    f += 0.0625*ngnoise31( q ); q = m*q*2.01;
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    return f;
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}
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