--- a/src/noise.cc Wed Apr 23 10:38:33 2008 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,108 +0,0 @@
-/*
- * noise.cc: noise generators
- *
- * This file is part of Pyrit Ray Tracer.
- *
- * Copyright 2006, 2008 Radek Brich
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
- * THE SOFTWARE.
- */
-
-#include <math.h>
-
-#include "noise.h"
-
-/*
-Perlin noise
-Based on JAVA REFERENCE IMPLEMENTATION OF IMPROVED NOISE by KEN PERLIN (COPYRIGHT 2002)
-*/
-
-Float fade(Float t)
-{
- return t * t * t * (t * (t * 6 - 15) + 10);
-}
-
-Float lerp(Float t, Float a, Float b)
-{
- return a + t * (b - a);
-}
-
-Float grad(unsigned char hash, Float x, Float y, Float z)
-{
- unsigned char h = hash & 15; // CONVERT LO 4 BITS OF HASH CODE
- Float 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);
-}
-
-const unsigned char p[512] =
-{
- 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
-};
-
-
-Float perlin(Float x, Float y, Float z)
-{
- int X = (int)floor(x) & 255,
- Y = (int)floor(y) & 255,
- Z = (int)floor(z) & 255;
- x -= floor(x);
- y -= floor(y);
- z -= floor(z);
- Float u = fade(x),
- v = fade(y),
- w = fade(z);
- int A = p[X ]+Y, AA = p[A]+Z, AB = p[A+1]+Z,
- B = p[X+1]+Y, BA = p[B]+Z, BB = p[B+1]+Z;
-
- return lerp(w, lerp(v, lerp(u, grad(p[AA ], x , y , z ),
- grad(p[BA ], x-1, y , z )),
- lerp(u, grad(p[AB ], x , y-1, z ),
- grad(p[BB ], x-1, y-1, z ))),
- lerp(v, lerp(u, grad(p[AA+1], x , y , z-1 ),
- grad(p[BA+1], x-1, y , z-1 )),
- lerp(u, grad(p[AB+1], x , y-1, z-1 ),
- grad(p[BB+1], x-1, y-1, z-1 ))));
-}