-
Notifications
You must be signed in to change notification settings - Fork 1
Commit
This commit does not belong to any branch on this repository, and may belong to a fork outside of the repository.
Merge remote-tracking branch 'origin/master'
Conflicts: app/assets/javascripts/Gameplay.js
- Loading branch information
Showing
3 changed files
with
64 additions
and
1 deletion.
There are no files selected for viewing
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,56 @@ | ||
// This is a port of Ken Perlin's Java code. The | ||
// original Java code is at http://cs.nyu.edu/%7Eperlin/noise/. | ||
// Note that in this version, a number from 0 to 1 is returned. | ||
PerlinNoise = new function() { | ||
|
||
this.noise = function(x, y, z) { | ||
|
||
var p = new Array(512) | ||
var permutation = [ 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 | ||
]; | ||
for (var i=0; i < 256 ; i++) | ||
p[256+i] = p[i] = permutation[i]; | ||
|
||
var X = Math.floor(x) & 255, // FIND UNIT CUBE THAT | ||
Y = Math.floor(y) & 255, // CONTAINS POINT. | ||
Z = Math.floor(z) & 255; | ||
x -= Math.floor(x); // FIND RELATIVE X,Y,Z | ||
y -= Math.floor(y); // OF POINT IN CUBE. | ||
z -= Math.floor(z); | ||
var u = fade(x), // COMPUTE FADE CURVES | ||
v = fade(y), // FOR EACH OF X,Y,Z. | ||
w = fade(z); | ||
var A = p[X ]+Y, AA = p[A]+Z, AB = p[A+1]+Z, // HASH COORDINATES OF | ||
B = p[X+1]+Y, BA = p[B]+Z, BB = p[B+1]+Z; // THE 8 CUBE CORNERS, | ||
|
||
return scale(lerp(w, lerp(v, lerp(u, grad(p[AA ], x , y , z ), // AND ADD | ||
grad(p[BA ], x-1, y , z )), // BLENDED | ||
lerp(u, grad(p[AB ], x , y-1, z ), // RESULTS | ||
grad(p[BB ], x-1, y-1, z ))),// FROM 8 | ||
lerp(v, lerp(u, grad(p[AA+1], x , y , z-1 ), // CORNERS | ||
grad(p[BA+1], x-1, y , z-1 )), // OF CUBE | ||
lerp(u, grad(p[AB+1], x , y-1, z-1 ), | ||
grad(p[BB+1], x-1, y-1, z-1 ))))); | ||
} | ||
function fade(t) { return t * t * t * (t * (t * 6 - 15) + 10); } | ||
function lerp( t, a, b) { return a + t * (b - a); } | ||
function grad(hash, x, y, z) { | ||
var h = hash & 15; // CONVERT LO 4 BITS OF HASH CODE | ||
var u = h<8 ? x : y, // INTO 12 GRADIENT DIRECTIONS. | ||
v = h<4 ? y : h==12||h==14 ? x : z; | ||
return ((h&1) == 0 ? u : -u) + ((h&2) == 0 ? v : -v); | ||
} | ||
function scale(n) { return (1 + n)/2; } | ||
} |
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters