From 56cc59cf44ec64440ba4d1c0d005196195c758e6 Mon Sep 17 00:00:00 2001 From: hugues Date: Sat, 25 Mar 2006 15:07:51 +0000 Subject: Nettoyage du repository glagen git-svn-id: file:///usr/local/opt/svn/repos/glagen@12 0f7e0d06-a6f9-0310-a55f-d5f984f55e4c --- trunk/glagen/3d/perlin.cc | 347 ---------------------------------------------- 1 file changed, 347 deletions(-) delete mode 100644 trunk/glagen/3d/perlin.cc (limited to 'trunk/glagen/3d/perlin.cc') diff --git a/trunk/glagen/3d/perlin.cc b/trunk/glagen/3d/perlin.cc deleted file mode 100644 index 5cb4aee..0000000 --- a/trunk/glagen/3d/perlin.cc +++ /dev/null @@ -1,347 +0,0 @@ -//============================================================================= -// -// Glagen : a planet sized landscape generator -// Copyright (C) 2002 Julien Guertault, Hugues Hiegel, Meng-Tih Lam -// -// This program is free software; you can redistribute it and/or -// modify it under the terms of the GNU General Public License -// as published by the Free Software Foundation; either version 2 -// of the License, or (at your option) any later version. -// -// This program is distributed in the hope that it will be useful, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// GNU General Public License for more details. -// -// You should have received a copy of the GNU General Public License -// along with this program; if not, write to the Free Software -// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. -// -//============================================================================= -// -// Glagen : GPL LAndscape GENerator -// -// perlin.cc for Glagen : made by Zavie (Julien Guertault) -// -// www.glagen.org -// -//============================================================================= - -// Original implementation fo Perlin noice. -// It can be found on : -// http://mrl.nyu.edu/~perlin/doc/oscar.html#noise -// -// The 4th dimension noise has been added for our needs - -// coherent noise function over 1, 2 or 3 dimensions -// (copyright Ken Perlin) - -#include -#include -#include "data_glagen.hh" - -#define B 0x100 -#define BM 0xff - -#define N 0x1000 -#define NP 12 /* 2^N */ -#define NM 0xfff - -static int p[B + B + 2]; -static float g4[B + B + 2][4]; -static float g3[B + B + 2][3]; -static float g2[B + B + 2][2]; -static float g1[B + B + 2]; - -#define s_curve(t) ( t * t * (3. - 2. * t) ) - -#define lerp(t, a, b) ( a + t * (b - a) ) - -#define setup(i,b0,b1,r0,r1)\ - t = vec[i] + N;\ - b0 = ((int)t) & BM;\ - b1 = (b0+1) & BM;\ - r0 = t - (int)t;\ - r1 = r0 - 1.; - -float GLG_Perlin_noise_1D (float arg) -{ - int bx0, bx1; - float rx0, rx1; - float sx; - float t, u, v; - float vec[1]; - - vec[0] = arg; - - setup(0, bx0,bx1, rx0,rx1); - - sx = s_curve(rx0); - - u = rx0 * g1[ p[ bx0 ] ]; - v = rx1 * g1[ p[ bx1 ] ]; - - return lerp(sx, u, v); -} - -float GLG_Perlin_noise_2D (float vec[2]) -{ - int bx0, bx1; - int by0, by1; - int b00, b10, b01, b11; - float rx0, rx1; - float ry0, ry1; - float *q, sx, sy; - float a, b; - float t, u, v; - register int i, j; - - setup(0, bx0,bx1, rx0,rx1); - setup(1, by0,by1, ry0,ry1); - - i = p[ bx0 ]; - j = p[ bx1 ]; - - b00 = p[ i + by0 ]; - b10 = p[ j + by0 ]; - b01 = p[ i + by1 ]; - b11 = p[ j + by1 ]; - - sx = s_curve(rx0); - sy = s_curve(ry0); - -#define at2(rx,ry) ( rx * q[0] + ry * q[1] ) - - q = g2[ b00 ] ; u = at2(rx0,ry0); - q = g2[ b10 ] ; v = at2(rx1,ry0); - a = lerp(sx, u, v); - - q = g2[ b01 ] ; u = at2(rx0,ry1); - q = g2[ b11 ] ; v = at2(rx1,ry1); - b = lerp(sx, u, v); - - return lerp(sy, a, b); -} - -float GLG_Perlin_noise_3D (float vec[3]) -{ - int bx0, bx1; - int by0, by1; - int bz0, bz1; - int b00, b10, b01, b11; - float rx0, rx1; - float ry0, ry1; - float rz0, rz1; - float *q, sy, sz; - float a, b, c, d; - float t, u, v; - register int i, j; - - setup(0, bx0,bx1, rx0,rx1); - setup(1, by0,by1, ry0,ry1); - setup(2, bz0,bz1, rz0,rz1); - - i = p[ bx0 ]; - j = p[ bx1 ]; - - b00 = p[ i + by0 ]; - b10 = p[ j + by0 ]; - b01 = p[ i + by1 ]; - b11 = p[ j + by1 ]; - - t = s_curve(rx0); - sy = s_curve(ry0); - sz = s_curve(rz0); - -#define at3(rx,ry,rz) ( rx * q[0] + ry * q[1] + rz * q[2] ) - - q = g3[ b00 + bz0 ] ; u = at3(rx0,ry0,rz0); - q = g3[ b10 + bz0 ] ; v = at3(rx1,ry0,rz0); - a = lerp(t, u, v); - - q = g3[ b01 + bz0 ] ; u = at3(rx0,ry1,rz0); - q = g3[ b11 + bz0 ] ; v = at3(rx1,ry1,rz0); - b = lerp(t, u, v); - - c = lerp(sy, a, b); - - q = g3[ b00 + bz1 ] ; u = at3(rx0,ry0,rz1); - q = g3[ b10 + bz1 ] ; v = at3(rx1,ry0,rz1); - a = lerp(t, u, v); - - q = g3[ b01 + bz1 ] ; u = at3(rx0,ry1,rz1); - q = g3[ b11 + bz1 ] ; v = at3(rx1,ry1,rz1); - b = lerp(t, u, v); - - d = lerp(sy, a, b); - - return lerp(sz, c, d); -} - -float GLG_Perlin_noise_4D (float vec[4]) -{ - int bx0, bx1; - int by0, by1; - int bz0, bz1; - int bt0, bt1; - register int a0, a1; - int b00, b10, b01, b11; - int c000, c001, c010, c011, c100, c101, c110, c111; - float rx0, rx1; - float ry0, ry1; - float rz0, rz1; - float rt0, rt1; - float *q, sx, sy, sz, st; - float a, b, c, d, e, f; - float t, u, v; - - setup(0, bx0,bx1, rx0,rx1); - setup(1, by0,by1, ry0,ry1); - setup(2, bz0,bz1, rz0,rz1); - setup(3, bt0,bt1, rt0,rt1); - - a0 = p[ bx0 ]; - a1 = p[ bx1 ]; - - b00 = p[ a0 + by0 ]; - b10 = p[ a1 + by0 ]; - b01 = p[ a0 + by1 ]; - b11 = p[ a1 + by1 ]; - - c000 = p[ b00 + bz0 ]; - c100 = p[ b10 + bz0 ]; - c010 = p[ b01 + bz0 ]; - c110 = p[ b11 + bz0 ]; - c001 = p[ b00 + bz1 ]; - c101 = p[ b10 + bz1 ]; - c011 = p[ b01 + bz1 ]; - c111 = p[ b11 + bz1 ]; - - sx = s_curve(rx0); - sy = s_curve(ry0); - sz = s_curve(rz0); - st = s_curve(rt0); - -#define at4(rx, ry, rz, rt) ( rx * q[0] + ry * q[1] + rz * q[2] + rt * q[3]) - - q = g4[c000 + bt0]; u = at4(rx0, ry0, rz0, rt0); - q = g4[c100 + bt0]; v = at4(rx1, ry0, rz0, rt0); - a = lerp(sx, u, v); - - q = g4[c010 + bt0]; u = at4(rx0, ry1, rz0, rt0); - q = g4[c110 + bt0]; v = at4(rx1, ry1, rz0, rt0); - b = lerp(sx, u, v); - - c = lerp (sy, a, b); - - q = g4[c001 + bt0]; u = at4(rx0, ry0, rz1, rt0); - q = g4[c101 + bt0]; v = at4(rx1, ry0, rz1, rt0); - a = lerp(sx, u, v); - - q = g4[c011 + bt0]; u = at4(rx0, ry1, rz1, rt0); - q = g4[c111 + bt0]; v = at4(rx1, ry1, rz1, rt0); - b = lerp(sx, u, v); - - d = lerp (sy, a, b); - - - e = lerp (sz, c, d); - - - q = g4[c000 + bt1]; u = at4(rx0, ry0, rz0, rt1); - q = g4[c100 + bt1]; v = at4(rx1, ry0, rz0, rt1); - a = lerp(sx, u, v); - - q = g4[c010 + bt1]; u = at4(rx0, ry1, rz0, rt1); - q = g4[c110 + bt1]; v = at4(rx1, ry1, rz0, rt1); - b = lerp(sx, u, v); - - c = lerp (sy, a, b); - - q = g4[c001 + bt1]; u = at4(rx0, ry0, rz1, rt1); - q = g4[c101 + bt1]; v = at4(rx1, ry0, rz1, rt1); - a = lerp(sx, u, v); - - q = g4[c011 + bt1]; u = at4(rx0, ry1, rz1, rt1); - q = g4[c111 + bt1]; v = at4(rx1, ry1, rz1, rt1); - b = lerp(sx, u, v); - - d = lerp (sy, a, b); - - - f = lerp (sz, c, d); - - - return lerp (st, e, f); -} - -static void normalize2 (float v[2]) -{ - float s; - - s = sqrtf(v[0] * v[0] + v[1] * v[1]); - v[0] = v[0] / s; - v[1] = v[1] / s; -} - -static void normalize3 (float v[3]) -{ - float s; - - s = sqrtf(v[0] * v[0] + v[1] * v[1] + v[2] * v[2]); - v[0] = v[0] / s; - v[1] = v[1] / s; - v[2] = v[2] / s; -} - -static void normalize4 (float v[4]) -{ - float s; - - s = sqrtf(v[0] * v[0] + v[1] * v[1] + v[2] * v[2] + v[3] * v[3]); - v[0] = v[0] / s; - v[1] = v[1] / s; - v[2] = v[2] / s; - v[3] = v[3] / s; -} - -void Perlin_init () -{ - int i, j, k; - - for (i = 0 ; i < B ; i++) - { - p[i] = i; - - g1[i] = (float)((rand() % (B + B)) - B) / B; - - for (j = 0 ; j < 2 ; j++) - g2[i][j] = (float)((rand() % (B + B)) - B) / B; - normalize2(g2[i]); - - for (j = 0 ; j < 3 ; j++) - g3[i][j] = (float)((rand() % (B + B)) - B) / B; - normalize3(g3[i]); - - for (j = 0 ; j < 4 ; j++) - g4[i][j] = (float)((rand() % (B + B)) - B) / B; - normalize4(g4[i]); - } - - while (--i) - { - k = p[i]; - p[i] = p[j = rand() % B]; - p[j] = k; - } - - for (i = 0 ; i < B + 2 ; i++) - { - p[B + i] = p[i]; - g1[B + i] = g1[i]; - for (j = 0 ; j < 2 ; j++) - g2[B + i][j] = g2[i][j]; - for (j = 0 ; j < 3 ; j++) - g3[B + i][j] = g3[i][j]; - } -} -- cgit v1.2.3