Perlin noise: Difference between revisions
Perlin noise en FreeBASIC
MaiconSoft (talk | contribs) m (Added Delphi reference to Pascal code) |
(Perlin noise en FreeBASIC) |
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0.1369199587840001
</pre>
=={{header|FreeBASIC}}==
{{trans|PureBasic}}
{{trans|Phix}}
<lang freebasic>
#define floor(x) ((x*2.0-0.5) Shr 1)
Dim Shared As Byte p(256) => { _
151, 160, 137, 91, 90, 15, 131, 13, 201, 95, 96, 53, 194, 233, 7, 225, _
140, 36, 103, 30, 69, 142, 8, 99, 37, 240, 21, 10, 23, 190, 6, 148, _
247, 120, 234, 75, 0, 26, 197, 62, 94, 252, 219, 203, 117, 35, 11, 32, _
57, 177, 33, 88, 237, 149, 56, 87, 174, 20, 125, 136, 171, 168, 68, 175, _
74, 165, 71, 134, 139, 48, 27, 166, 77, 146, 158, 231, 83, 111, 229, 122, _
60, 211, 133, 230, 220, 105, 92, 41, 55, 46, 245, 40, 244, 102, 143, 54, _
65, 25, 63, 161, 1, 216, 80, 73, 209, 76, 132, 187, 208, 89, 18, 169, _
200, 196, 135, 130, 116, 188, 159, 86, 164, 100, 109, 198, 173, 186, 3, 64, _
52, 217, 226, 250, 124, 123, 5, 202, 38, 147, 118, 126, 255, 82, 85, 212, _
207, 206, 59, 227, 47, 16, 58, 17, 182, 189, 28, 42, 223, 183, 170, 213, _
119, 248, 152, 2, 44, 154, 163, 70, 221, 153, 101, 155, 167, 43, 172, 9, _
129, 22, 39, 253, 19, 98, 108, 110, 79, 113, 224, 232, 178, 185, 112, 104, _
218, 246, 97, 228, 251, 34, 242, 193, 238, 210, 144, 12, 191, 179, 162, 241, _
81, 51, 145, 235, 249, 14, 239, 107, 49, 192, 214, 31, 181, 199, 106, 157, _
184, 84, 204, 176, 115, 121, 50, 45, 127, 4, 150, 254, 138, 236, 205, 93, _
222, 114, 67, 29, 24, 72, 243, 141, 128, 195, 78, 66, 215, 61, 156, 180}
Function fade(t As Double) As Double
Return t * t * t * (t * (t * 6 - 15) + 10)
End Function
Function lerp(t As Double, a As Double, b As Double) As Double
Return a + t * (b - a)
End Function
Function grad(hash As Integer, x As Double, y As Double, z As Double) As Double
Select Case (hash And 15)
Case 0 : Return x+y
Case 1 : Return y-x
Case 2 : Return x-y
Case 3 : Return -x-y
Case 4 : Return x+z
Case 5 : Return z-x
Case 6 : Return x-z
Case 7 : Return -x-y
Case 8 : Return y+z
Case 9 : Return z-y
Case 10 : Return y-z
Case 11 : Return -y-z
Case 12 : Return x+y
Case 13 : Return z-y
Case 14 : Return y-x
Case 15 : Return -y-z
End Select
End Function
Function noise(x As Double, y As Double, z As Double) As Double
Dim As Integer a = Int(x) And 255, b = Int(y) And 255, c = Int(z) And 255
x -= floor(x) : y -= floor(y) : z -= floor(z)
Dim As Double u = fade(x), v = fade(y), w = fade(z)
Dim As Integer A0 = p(a)+b, A1 = p(A0)+c, A2 = p(A0+1)+c
Dim As Integer B0 = p(a+1)+b, B1 = p(B0)+c, B2 = p(B0+1)+c
Return lerp(w, lerp(v, lerp(u, grad(p(A1), x, y, z), _
grad(p(B1), x-1, y, z)), _
lerp(u, grad(p(A2), x, y-1, z), _
grad(p(B2), x-1, y-1, z))), _
lerp(v, lerp(u, grad(p(A1+1), x, y, z-1), _
grad(p(B1+1), x-1, y, z-1)), _
lerp(u, grad(p(A2+1), x, y-1, z-1), _
grad(p(B2+1), x-1, y-1, z-1))))
End Function
Print Using "El Ruido Perlin para (3.14, 42, 7) es #.################"; noise(3.14, 42, 7)
Sleep
</lang>
{{out}}
<pre>
El Ruido Perlin para (3.14, 42, 7) es 0.1369199587840001
</pre>
=={{header|GLSL}}==
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