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define(function(require, exports){
exports.permute1 = function(x){
return mod((34.0 * x + 1.0) * x, 289.0)
}
exports.permute3 = function(x){
return mod((34.0 * x + 1.0) * x, 289.0)
}
exports.permute4 = function(x){
return mod((34.0 * x + 1.0) * x, 289.0)
}
exports.isqrtT1 = function(r){
return 1.79284291400159 - 0.85373472095314 * r
}
exports.isqrtT4 = function(r){
return vec4(1.79284291400159 - 0.85373472095314 * r)
}
exports.snoise2 = function(x, y){
return snoise2v(vec2(x,y,z))
}
exports.cheapnoise = function(inp){
return fract(sin(dot(inp.xy ,vec2(12.9898,78.233))) * 43758.5453);
}
exports.noise2d =
exports.s2d =
exports.snoise2v = function(v){
var C = vec4(0.211324865405187,0.366025403784439,-0.577350269189626,0.024390243902439)
var i = floor(v + dot(v, C.yy) )
var x0 = v - i + dot(i, C.xx)
var i1 = (x0.x > x0.y) ? vec2(1.0, 0.0) : vec2(0.0, 1.0)
var x12 = x0.xyxy + C.xxzz
x12.xy -= i1
i = mod(i, 289.0)
var p = permute3(permute3(i.y + vec3(0.0, i1.y, 1.0)) + i.x + vec3(0.0, i1.x, 1.0 ))
var m = max(0.5 - vec3(dot(x0,x0), dot(x12.xy,x12.xy), dot(x12.zw,x12.zw)), 0.0)
m = m*m
m = m*m
var x = 2.0 * fract(p * C.www) - 1.0
var h = abs(x) - 0.5
var ox = floor(x + 0.5)
var a0 = x - ox
m *= (1.79284291400159 - 0.85373472095314 * ( a0*a0 + h*h ))
var g = vec3()
g.x = a0.x * x0.x + h.x * x0.y
g.yz = a0.yz * x12.xz + h.yz * x12.yw
return 130.0 * dot(m, g)
}
exports.snoise3 = function(x, y, z){
return snoise3v(vec3(x,y,z))
}
exports.noise3d =
exports.snoise3v = function(v){
var C = vec2(1.0/6.0, 1.0/3.0)
var D = vec4(0.0, 0.5, 1.0, 2.0)
var i = floor(v + dot(v, C.yyy))
var x0 = v - i + dot(i, C.xxx)
var g = step(x0.yzx, x0.xyz)
var l = 1.0 - g
var i1 = min(g.xyz, l.zxy)
var i2 = max(g.xyz, l.zxy)
var x1 = x0 - i1 + 1.0 * C.xxx
var x2 = x0 - i2 + 2.0 * C.xxx
var x3 = x0 - 1. + 3.0 * C.xxx
i = mod(i, 289.0)
var p = permute4(permute4(permute4(
i.z + vec4(0.0, i1.z, i2.z, 1.0))
+ i.y + vec4(0.0, i1.y, i2.y, 1.0))
+ i.x + vec4(0.0, i1.x, i2.x, 1.0))
var n_ = 1.0/7.0
var ns = n_ * D.wyz - D.xzx
var j = p - 49.0 * floor(p * ns.z *ns.z)
var x_ = floor(j * ns.z)
var y_ = floor(j - 7.0 * x_)
var x = x_ * ns.x + ns.yyyy
var y = y_ * ns.x + ns.yyyy
var h = 1.0 - abs(x) - abs(y)
var b0 = vec4( x.xy, y.xy )
var b1 = vec4( x.zw, y.zw )
var s0 = floor(b0)*2.0 + 1.0
var s1 = floor(b1)*2.0 + 1.0
var sh = -step(h, vec4(0.0))
var a0 = b0.xzyw + s0.xzyw*sh.xxyy
var a1 = b1.xzyw + s1.xzyw*sh.zzww
var p0 = vec3(a0.xy, h.x)
var p1 = vec3(a0.zw, h.y)
var p2 = vec3(a1.xy, h.z)
var p3 = vec3(a1.zw, h.w)
var norm = isqrtT4(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)))
p0 *= norm.x;
p1 *= norm.y;
p2 *= norm.z;
p3 *= norm.w;
var m = max(0.6 - vec4(dot(x0,x0), dot(x1,x1), dot(x2,x2), dot(x3,x3)), 0.0)
m = m * m
return 42.0 * dot( m*m, vec4( dot(p0,x0), dot(p1,x1),
dot(p2,x2), dot(p3,x3) ) )
}
exports.snoise4_g = function(j, ip){
var p = vec4()
p.xyz = floor( fract (vec3(j) * ip.xyz) * 7.0) * ip.z - 1.0
p.w = 1.5 - dot(abs(p.xyz), vec3(1.0,1.0,1.0))
var s = vec4(lessThan(p, vec4(0.0)))
p.xyz = p.xyz + (s.xyz*2.0 - 1.0) * s.www
return p
}
exports.snoise4 = function(x, y, z, w){
return snoise4v(vec4(x,y,z,w))
}
exports.snoise4v = function(v){
var C = vec4(0.138196601125011,0.276393202250021,0.414589803375032,-0.447213595499958)
var i = floor(v + dot(v, vec4(0.309016994374947451)) )
var x0 = v - i + dot(i, C.xxxx)
var i0 = vec4()
var isX = step( x0.yzw, x0.xxx )
var isYZ = step( x0.zww, x0.yyz )
i0.x = isX.x + isX.y + isX.z
i0.yzw = 1.0 - isX
i0.y += isYZ.x + isYZ.y
i0.zw += 1.0 - isYZ.xy
i0.z += isYZ.z
i0.w += 1.0 - isYZ.z
var i3 = clamp( i0, 0.0, 1.0 )
var i2 = clamp( i0-1.0, 0.0, 1.0 )
var i1 = clamp( i0-2.0, 0.0, 1.0 )
var x1 = x0 - i1 + C.xxxx
var x2 = x0 - i2 + C.yyyy
var x3 = x0 - i3 + C.zzzz
var x4 = x0 + C.wwww
i = mod(i, 289.0 )
var j0 = permute1( permute1( permute1( permute1(i.w) + i.z) + i.y) + i.x)
var j1 = permute4( permute4( permute4( permute4(
i.w + vec4(i1.w, i2.w, i3.w, 1.0 ))
+ i.z + vec4(i1.z, i2.z, i3.z, 1.0 ))
+ i.y + vec4(i1.y, i2.y, i3.y, 1.0 ))
+ i.x + vec4(i1.x, i2.x, i3.x, 1.0 ))
var ip = vec4(1.0/294.0, 1.0/49.0, 1.0/7.0, 0.0)
var p0 = snoise4_g(j0, ip)
var p1 = snoise4_g(j1.x, ip)
var p2 = snoise4_g(j1.y, ip)
var p3 = snoise4_g(j1.z, ip)
var p4 = snoise4_g(j1.w, ip)
var nr = isqrtT4(vec4(dot(p0,p0), dot(p1,p1), dot(p2, p2), dot(p3,p3)))
p0 *= nr.x
p1 *= nr.y
p2 *= nr.z
p3 *= nr.w
p4 *= isqrtT1(dot(p4,p4))
var m0 = max(0.6 - vec3(dot(x0,x0), dot(x1,x1), dot(x2,x2)), 0.0)
var m1 = max(0.6 - vec2(dot(x3,x3), dot(x4,x4)), 0.0)
m0 = m0 * m0
m1 = m1 * m1
return 49.0 * (dot(m0*m0, vec3(dot( p0, x0 ), dot(p1, x1), dot(p2, x2)))
+ dot(m1*m1, vec2( dot(p3, x3), dot(p4, x4))))
}
exports.cell2v = function(v){
return cell3v(vec3(v.x, v.y,0))
}
exports.cell3v = function(P){
var K = 0.142857142857
var Ko = 0.428571428571
var K2 = 0.020408163265306
var Kz = 0.166666666667
var Kzo = 0.416666666667
var ji = 0.8
var Pi = mod(floor(P), 289.0)
var Pf = fract(P)
var Pfx = Pf.x + vec4(0.0, -1.0, 0.0, -1.0)
var Pfy = Pf.y + vec4(0.0, 0.0, -1.0, -1.0)
var p = permute4(Pi.x + vec4(0.0, 1.0, 0.0, 1.0))
p = permute4(p + Pi.y + vec4(0.0, 0.0, 1.0, 1.0))
var p1 = permute4(p + Pi.z)
var p2 = permute4(p + Pi.z + vec4(1.0))
var ox1 = fract(p1*K) - Ko
var oy1 = mod(floor(p1*K), 7.0)*K - Ko
var oz1 = floor(p1*K2)*Kz - Kzo
var ox2 = fract(p2*K) - Ko
var oy2 = mod(floor(p2*K), 7.0)*K - Ko
var oz2 = floor(p2*K2)*Kz - Kzo
var dx1 = Pfx + ji*ox1
var dy1 = Pfy + ji*oy1
var dz1 = Pf.z + ji*oz1
var dx2 = Pfx + ji*ox2
var dy2 = Pfy + ji*oy2
var dz2 = Pf.z - 1.0 + ji*oz2
var d1 = dx1 * dx1 + dy1 * dy1 + dz1 * dz1
var d2 = dx2 * dx2 + dy2 * dy2 + dz2 * dz2
var d = min(d1,d2)
d2 = max(d1,d2)
d.xy = (d.x < d.y) ? d.xy : d.yx
d.xz = (d.x < d.z) ? d.xz : d.zx
d.xw = (d.x < d.w) ? d.xw : d.wx
d.yzw = min(d.yzw, d2.yzw)
d.y = min(d.y, d.z)
d.y = min(d.y, d.w)
d.y = min(d.y, d2.x)
return sqrt(d.xy)
},
exports.cell3w = function(P){
var K = 0.142857142857
var Ko = 0.428571428571
var K2 = 0.020408163265306
var Kz = 0.166666666667
var Kzo = 0.416666666667
var ji = 1.0
var Pi = mod(floor(P), 289.0)
var Pf = fract(P) - 0.5
var Pfx = Pf.x + vec3(1.0, 0.0, -1.0)
var Pfy = Pf.y + vec3(1.0, 0.0, -1.0)
var Pfz = Pf.z + vec3(1.0, 0.0, -1.0)
var p = permute3(Pi.x + vec3(-1.0, 0.0, 1.0))
var p1 = permute3(p + Pi.y - 1.0)
var p2 = permute3(p + Pi.y)
var p3 = permute3(p + Pi.y + 1.0)
var p11 = permute3(p1 + Pi.z - 1.0)
var p12 = permute3(p1 + Pi.z)
var p13 = permute3(p1 + Pi.z + 1.0)
var p21 = permute3(p2 + Pi.z - 1.0)
var p22 = permute3(p2 + Pi.z)
var p23 = permute3(p2 + Pi.z + 1.0)
var p31 = permute3(p3 + Pi.z - 1.0)
var p32 = permute3(p3 + Pi.z)
var p33 = permute3(p3 + Pi.z + 1.0)
var ox11 = fract(p11*K) - Ko
var oy11 = mod(floor(p11*K), 7.0)*K - Ko
var oz11 = floor(p11*K2)*Kz - Kzo
var ox12 = fract(p12*K) - Ko
var oy12 = mod(floor(p12*K), 7.0)*K - Ko
var oz12 = floor(p12*K2)*Kz - Kzo
var ox13 = fract(p13*K) - Ko
var oy13 = mod(floor(p13*K), 7.0)*K - Ko
var oz13 = floor(p13*K2)*Kz - Kzo
var ox21 = fract(p21*K) - Ko
var oy21 = mod(floor(p21*K), 7.0)*K - Ko
var oz21 = floor(p21*K2)*Kz - Kzo
var ox22 = fract(p22*K) - Ko
var oy22 = mod(floor(p22*K), 7.0)*K - Ko
var oz22 = floor(p22*K2)*Kz - Kzo
var ox23 = fract(p23*K) - Ko
var oy23 = mod(floor(p23*K), 7.0)*K - Ko
var oz23 = floor(p23*K2)*Kz - Kzo
var ox31 = fract(p31*K) - Ko
var oy31 = mod(floor(p31*K), 7.0)*K - Ko
var oz31 = floor(p31*K2)*Kz - Kzo
var ox32 = fract(p32*K) - Ko
var oy32 = mod(floor(p32*K), 7.0)*K - Ko
var oz32 = floor(p32*K2)*Kz - Kzo
var ox33 = fract(p33*K) - Ko
var oy33 = mod(floor(p33*K), 7.0)*K - Ko
var oz33 = floor(p33*K2)*Kz - Kzo
var dx11 = Pfx + ji*ox11
var dy11 = Pfy.x + ji*oy11
var dz11 = Pfz.x + ji*oz11
var dx12 = Pfx + ji*ox12
var dy12 = Pfy.x + ji*oy12
var dz12 = Pfz.y + ji*oz12
var dx13 = Pfx + ji*ox13
var dy13 = Pfy.x + ji*oy13
var dz13 = Pfz.z + ji*oz13
var dx21 = Pfx + ji*ox21
var dy21 = Pfy.y + ji*oy21
var dz21 = Pfz.x + ji*oz21
var dx22 = Pfx + ji*ox22
var dy22 = Pfy.y + ji*oy22
var dz22 = Pfz.y + ji*oz22
var dx23 = Pfx + ji*ox23
var dy23 = Pfy.y + ji*oy23
var dz23 = Pfz.z + ji*oz23
var dx31 = Pfx + ji*ox31
var dy31 = Pfy.z + ji*oy31
var dz31 = Pfz.x + ji*oz31
var dx32 = Pfx + ji*ox32
var dy32 = Pfy.z + ji*oy32
var dz32 = Pfz.y + ji*oz32
var dx33 = Pfx + ji*ox33
var dy33 = Pfy.z + ji*oy33
var dz33 = Pfz.z + ji*oz33
var d11 = dx11 * dx11 + dy11 * dy11 + dz11 * dz11
var d12 = dx12 * dx12 + dy12 * dy12 + dz12 * dz12
var d13 = dx13 * dx13 + dy13 * dy13 + dz13 * dz13
var d21 = dx21 * dx21 + dy21 * dy21 + dz21 * dz21
var d22 = dx22 * dx22 + dy22 * dy22 + dz22 * dz22
var d23 = dx23 * dx23 + dy23 * dy23 + dz23 * dz23
var d31 = dx31 * dx31 + dy31 * dy31 + dz31 * dz31
var d32 = dx32 * dx32 + dy32 * dy32 + dz32 * dz32
var d33 = dx33 * dx33 + dy33 * dy33 + dz33 * dz33
var d1a = min(d11, d12)
d12 = max(d11, d12)
d11 = min(d1a, d13)
d13 = max(d1a, d13)
d12 = min(d12, d13)
var d2a = min(d21, d22)
d22 = max(d21, d22)
d21 = min(d2a, d23)
d23 = max(d2a, d23)
d22 = min(d22, d23)
var d3a = min(d31, d32)
d32 = max(d31, d32)
d31 = min(d3a, d33)
d33 = max(d3a, d33)
d32 = min(d32, d33)
var da = min(d11, d21)
d21 = max(d11, d21)
d11 = min(da, d31)
d31 = max(da, d31)
d11.xy = (d11.x < d11.y) ? d11.xy : d11.yx
d11.xz = (d11.x < d11.z) ? d11.xz : d11.zx
d12 = min(d12, d21)
d12 = min(d12, d22)
d12 = min(d12, d31)
d12 = min(d12, d32)
d11.yz = min(d11.yz, d12.xy)
d11.y = min(d11.y, d12.z)
d11.y = min(d11.y, d11.z)
return sqrt(d11.xy)
}
}) |