API tools faq
paste
Slicksilver555

Untitled

Slicksilver555
Oct 23rd, 2012
75
0
Never
Add comment
Not a member of Pastebin yet? Sign Up, it unlocks many cool features!
text 6.49 KB | None | 0 0
raw download clone embed print report
  1. // Perlin 1.0
  2. // Ported from java (http://mrl.nyu.edu/~perlin/noise/) by Ron Valstar (http://www.sjeiti.com/)
  3. // and some help from http://freespace.virgin.net/hugo.elias/models/m_perlin.htm
  4. // AS3 optimizations by Mario Klingemann http://www.quasimondo.com
  5. // then ported to js by Ron Valstar
  6. if (!this.Perlin) {
  7. var Perlin = function() {
  8.  
  9. var oRng = Math;
  10.  
  11. var p = [151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,190,6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,174,20,125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,102,143,54,65,25,63,161,1,216,80,73,209,76,132,187,208,89,18,169,200,196,135,130,116,188,159,86,164,100,109,198,173,186,3,64,52,217,226,250,124,123,5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,223,183,170,213,119,248,152,2,44,154,163,70,221,153,101,155,167,43,172,9,129,22,39,253,19,98,108,110,79,113,224,232,178,185,112,104,218,246,97,228,251,34,242,193,238,210,144,12,191,179,162,241,81,51,145,235,249,14,239,107,49,192,214,31,181,199,106,157,184,84,204,176,115,121,50,45,127,4,150,254,138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180,151,160,137,91,90,15,131,13,201,95,96,53,194,233,7,225,140,36,103,30,69,142,8,99,37,240,21,10,23,190,6,148,247,120,234,75,0,26,197,62,94,252,219,203,117,35,11,32,57,177,33,88,237,149,56,87,174,20,125,136,171,168,68,175,74,165,71,134,139,48,27,166,77,146,158,231,83,111,229,122,60,211,133,230,220,105,92,41,55,46,245,40,244,102,143,54,65,25,63,161,1,216,80,73,209,76,132,187,208,89,18,169,200,196,135,130,116,188,159,86,164,100,109,198,173,186,3,64,52,217,226,250,124,123,5,202,38,147,118,126,255,82,85,212,207,206,59,227,47,16,58,17,182,189,28,42,223,183,170,213,119,248,152,2,44,154,163,70,221,153,101,155,167,43,172,9,129,22,39,253,19,98,108,110,79,113,224,232,178,185,112,104,218,246,97,228,251,34,242,193,238,210,144,12,191,179,162,241,81,51,145,235,249,14,239,107,49,192,214,31,181,199,106,157,184,84,204,176,115,121,50,45,127,4,150,254,138,236,205,93,222,114,67,29,24,72,243,141,128,195,78,66,215,61,156,180];
  12.  
  13. var iOctaves = 1;
  14. var fPersistence = 0.5;
  15.  
  16. var aOctFreq; // frequency per octave
  17. var aOctPers; // persistence per octave
  18. var fPersMax; // 1 / max persistence
  19.  
  20. var iXoffset;
  21. var iYoffset;
  22. var iZoffset;
  23.  
  24. // octFreqPers
  25. var octFreqPers = function octFreqPers() {
  26. var fFreq, fPers;
  27. aOctFreq = [];
  28. aOctPers = [];
  29. fPersMax = 0;
  30. for (var i=0;i<iOctaves;i++) {
  31. fFreq = Math.pow(2,i);
  32. fPers = Math.pow(fPersistence,i);
  33. fPersMax += fPers;
  34. aOctFreq.push( fFreq );
  35. aOctPers.push( fPers );
  36. }
  37. fPersMax = 1 / fPersMax;
  38. };
  39. // setOffset
  40. var setOffset = function setOffset(n) {
  41. iXoffset = Math.floor(oRng.random()*256);
  42. iYoffset = Math.floor(oRng.random()*256);
  43. iZoffset = Math.floor(oRng.random()*256);
  44. };
  45. // init
  46. setOffset();
  47. octFreqPers();
  48. //
  49. // return
  50. return {
  51. noise: function(x,y,z) {
  52.  
  53. x = x||0;
  54. y = y||0;
  55. z = z||0;
  56.  
  57. var fResult = 0;
  58. var fFreq, fPers;
  59. var xf, yf, zf, u, v, w, xx, yy, zz;
  60. var x1, y1, z1;
  61. var X, Y, Z, A, B, AA, AB, BA, BB, hash;
  62. var g1, g2, g3, g4, g5, g6, g7, g8;
  63.  
  64. x += iXoffset;
  65. y += iYoffset;
  66. z += iZoffset;
  67.  
  68. for (var i=0;i<iOctaves;i++) {
  69. fFreq = aOctFreq[i];
  70. fPers = aOctPers[i];
  71.  
  72. xx = x * fFreq;
  73. yy = y * fFreq;
  74. zz = z * fFreq;
  75.  
  76. xf = Math.floor(xx);
  77. yf = Math.floor(yy);
  78. zf = Math.floor(zz);
  79.  
  80. X = Math.floor(xf & 255);
  81. Y = Math.floor(yf & 255);
  82. Z = Math.floor(zf & 255);
  83.  
  84. xx -= xf;
  85. yy -= yf;
  86. zz -= zf;
  87.  
  88. u = xx * xx * xx * (xx * (xx*6 - 15) + 10);
  89. v = yy * yy * yy * (yy * (yy*6 - 15) + 10);
  90. w = zz * zz * zz * (zz * (zz*6 - 15) + 10);
  91.  
  92. A = Math.round(p[X]) + Y;
  93. AA = Math.round(p[A]) + Z;
  94. AB = Math.round(p[Math.round(A+1)]) + Z;
  95. B = Math.round(p[Math.round(X+1)]) + Y;
  96. BA = Math.round(p[B]) + Z;
  97. BB = Math.round(p[Math.round(B+1)]) + Z;
  98.  
  99. x1 = xx-1;
  100. y1 = yy-1;
  101. z1 = zz-1;
  102.  
  103. hash = Math.round(p[Math.round(BB+1)]) & 15;
  104. g1 = ((hash&1) === 0 ? (hash<8 ? x1 : y1) : (hash<8 ? -x1 : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? x1 : z1 ) : hash<4 ? -y1 : ( hash===14 ? -x1 : -z1 ));
  105.  
  106. hash = Math.round(p[Math.round(AB+1)]) & 15;
  107. g2 = ((hash&1) === 0 ? (hash<8 ? xx : y1) : (hash<8 ? -xx : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? xx : z1 ) : hash<4 ? -y1 : ( hash===14 ? -xx : -z1 ));
  108.  
  109. hash = Math.round(p[Math.round(BA+1)]) & 15;
  110. g3 = ((hash&1) === 0 ? (hash<8 ? x1 : yy) : (hash<8 ? -x1 : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? x1 : z1 ) : hash<4 ? -yy : ( hash===14 ? -x1 : -z1 ));
  111.  
  112. hash = Math.round(p[Math.round(AA+1)]) & 15;
  113. g4 = ((hash&1) === 0 ? (hash<8 ? xx : yy) : (hash<8 ? -xx : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? xx : z1 ) : hash<4 ? -yy : ( hash===14 ? -xx : -z1 ));
  114.  
  115. hash = Math.round(p[BB]) & 15;
  116. g5 = ((hash&1) === 0 ? (hash<8 ? x1 : y1) : (hash<8 ? -x1 : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? x1 : zz ) : hash<4 ? -y1 : ( hash===14 ? -x1 : -zz ));
  117.  
  118. hash = Math.round(p[AB]) & 15;
  119. g6 = ((hash&1) === 0 ? (hash<8 ? xx : y1) : (hash<8 ? -xx : -y1)) + ((hash&2) === 0 ? hash<4 ? y1 : ( hash===12 ? xx : zz ) : hash<4 ? -y1 : ( hash===14 ? -xx : -zz ));
  120.  
  121. hash = Math.round(p[BA]) & 15;
  122. g7 = ((hash&1) === 0 ? (hash<8 ? x1 : yy) : (hash<8 ? -x1 : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? x1 : zz ) : hash<4 ? -yy : ( hash===14 ? -x1 : -zz ));
  123.  
  124. hash = Math.round(p[AA]) & 15;
  125. g8 = ((hash&1) === 0 ? (hash<8 ? xx : yy) : (hash<8 ? -xx : -yy)) + ((hash&2) === 0 ? hash<4 ? yy : ( hash===12 ? xx : zz ) : hash<4 ? -yy : ( hash===14 ? -xx : -zz ));
  126.  
  127. g2 += u * (g1 - g2);
  128. g4 += u * (g3 - g4);
  129. g6 += u * (g5 - g6);
  130. g8 += u * (g7 - g8);
  131.  
  132. g4 += v * (g2 - g4);
  133. g8 += v * (g6 - g8);
  134.  
  135. fResult += ( (g8 + w * (g4 - g8))) * fPers;
  136. }
  137.  
  138. return ( fResult * fPersMax + 1 ) * 0.5;
  139. },noiseDetail: function(octaves,falloff) {
  140. iOctaves = octaves||iOctaves;
  141. fPersistence = falloff||fPersistence;
  142. octFreqPers();
  143. },setRng: function(r) {
  144. oRng = r;
  145. setOffset();
  146. octFreqPers();
  147. },toString: function() {
  148. return "[object Perlin "+iOctaves+" "+fPersistence+"]";
  149. }
  150. };
  151. }();
  152. }
Advertisement
Add Comment
Please, Sign In to add comment
Public Pastes
We use cookies for various purposes including analytics. By continuing to use Pastebin, you agree to our use of cookies as described in the Cookies Policy.  OK, I Understand
Not a member of Pastebin yet?
Sign Up, it unlocks many cool features!