--- deliantra/server/common/noise.C 2011/04/23 04:46:25 1.4 +++ deliantra/server/common/noise.C 2011/04/30 05:41:17 1.13 @@ -1,7 +1,7 @@ /* * This file is part of Deliantra, the Roguelike Realtime MMORPG. * - * Copyright (©) 2010 Marc Alexander Lehmann / Robin Redeker / the Deliantra team + * Copyright (©) 2010,2011 Marc Alexander Lehmann / Robin Redeker / the Deliantra team * * Deliantra is free software: you can redistribute it and/or modify it under * the terms of the Affero GNU General Public License as published by the @@ -24,8 +24,77 @@ ///////////////////////////////////////////////////////////////////////////// +// perl -e 'for(0..255) { $p = (atan2 1,0) / 64 * $_; printf " %10g, %10g,\n", sin $p, cos $p }' | sort -R +static const float charges2[256][2] = { + -.975702, -.219101, .893224, .449611, .870087, -.492898, .595699, -.803208, + .14673, .989177, .995185, .0980171, .91421, -.405241, -.514103, .857729, + -.985278, -.170962, -.689541, -.724247, -.427555, .903989, .83147, -.55557, + .999699, -.0245412, .634393, .77301, -.514103, -.857729, -.0735646, -.99729, + .514103, -.857729, -.595699, -.803208, -.290285, .95694, .595699, .803208, + .266713, .963776, -.33689, .941544, .492898, -.870087, -.471397, -.881921, + -.99729, -.0735646, .615232, -.788346, -.91421, -.405241, -.575808, .817585, + .0980171, .995185, -.980785, .19509, -.122411, -.99248, .0735646, .99729, + -.634393, .77301, -.91421, .405241, .99248, .122411, .903989, -.427555, + -.24298, .970031, -.857729, .514103, -.359895, .932993, .382683, .92388, + .740951, -.671559, -.893224, .449611, -.95694, -.290285, -.975702, .219101, + -.970031, .24298, .999699, .0245412, -.405241, .91421, .985278, .170962, + .382683, -.92388, .95694, -.290285, .707107, -.707107, -.817585, -.575808, + -.989177, .14673, -.19509, -.980785, -.359895, -.932993, .313682, .949528, + -.0980171, .995185, 1, 6.12323e-17, .963776, -.266713, .998795, -.0490677, + -.998795, -.0490677, -.970031, -.24298, -.55557, .83147, -.14673, .989177, + -.83147, -.55557, -.995185, -.0980171, .870087, .492898, .941544, -.33689, + .575808, -.817585, .33689, .941544, .19509, -.980785, 0, 1, + .219101, -.975702, -.83147, .55557, .757209, -.653173, -.95694, .290285, + -.266713, .963776, -.0490677, .998795, .405241, .91421, -.405241, -.91421, + -.689541, .724247, -.534998, -.844854, -.99248, -.122411, .724247, .689541, + .492898, .870087, .817585, -.575808, .740951, .671559, -.33689, -.941544, + .95694, .290285, .77301, -.634393, .0245412, -.999699, -.77301, -.634393, + -.382683, .92388, -.24298, -.970031, -.893224, -.449611, .449611, .893224, + .975702, -.219101, -.382683, -.92388, .844854, .534998, -.803208, -.595699, + .941544, .33689, .963776, .266713, .932993, .359895, -.0735646, .99729, + .634393, -.77301, .405241, -.91421, .33689, -.941544, .99729, .0735646, + 1.22465e-16, -1, -.941544, -.33689, .0490677, -.998795, -.313682, .949528, + .92388, .382683, -.999699, .0245412, .0245412, .999699, .653173, .757209, + -.803208, .595699, .980785, -.19509, .817585, .575808, .975702, .219101, + -.615232, -.788346, .99248, -.122411, .998795, .0490677, -.707107, .707107, + .803208, -.595699, .671559, .740951, -.757209, -.653173, -.949528, .313682, + -.989177, -.14673, -.817585, .575808, -.14673, -.989177, -1, -1.83697e-16, + .290285, .95694, -.932993, -.359895, .24298, -.970031, .170962, .985278, + -.671559, -.740951, .427555, .903989, .427555, -.903989, -.941544, .33689, + -.492898, -.870087, -.266713, -.963776, .857729, -.514103, -.724247, .689541, + .724247, -.689541, -.653173, .757209, .689541, -.724247, .949528, -.313682, + -.19509, .980785, -.740951, .671559, -.999699, -.0245412, .689541, .724247, + .803208, .595699, -.170962, .985278, .0735646, -.99729, .970031, -.24298, + -.170962, -.985278, .471397, .881921, .91421, .405241, .893224, -.449611, + .0490677, .998795, -.615232, .788346, -.998795, .0490677, -.427555, -.903989, + -.0245412, .999699, -.534998, .844854, -.313682, -.949528, -.55557, -.83147, + -.903989, -.427555, -.724247, -.689541, -.740951, -.671559, .985278, -.170962, + -.857729, -.514103, -.99729, .0735646, .881921, -.471397, .534998, .844854, + .359895, -.932993, .77301, .634393, .99729, -.0735646, .290285, -.95694, + .575808, .817585, .757209, .653173, .903989, .427555, -.995185, .0980171, + -.903989, .427555, -.844854, .534998, -.707107, -.707107, -.92388, .382683, + -.653173, -.757209, -.881921, -.471397, -.219101, .975702, -.595699, .803208, + .0980171, -.995185, -.788346, .615232, -.0980171, -.995185, -.985278, .170962, + .122411, .99248, -.449611, -.893224, .170962, -.985278, .788346, .615232, + -.492898, .870087, .671559, -.740951, .449611, -.893224, -.757209, .653173, + .83147, .55557, -.290285, -.95694, -.932993, .359895, -.870087, -.492898, + .266713, -.963776, -.881921, .471397, -.77301, .634393, -.471397, .881921, + .844854, -.534998, .707107, .707107, .534998, -.844854, .514103, .857729, + .14673, -.989177, .980785, .19509, -.122411, .99248, -.449611, .893224, + .995185, -.0980171, -.634393, -.77301, .857729, .514103, .55557, .83147, + -.92388, -.382683, -.844854, -.534998, -.963776, .266713, .989177, -.14673, + .313682, -.949528, .359895, .932993, .24298, .970031, -.949528, -.313682, + .932993, -.359895, .55557, -.83147, .615232, .788346, -.788346, -.615232, + -.0245412, -.999699, -.219101, -.975702, .788346, -.615232, -.99248, .122411, + -.671559, .740951, -.870087, .492898, .970031, .24298, .881921, .471397, + .122411, -.99248, .471397, -.881921, .19509, .980785, -.963776, -.266713, + .92388, -.382683, .989177, .14673, -.575808, -.817585, .219101, .975702, + -.0490677, -.998795, -.980785, -.19509, .949528, .313682, .653173, -.757209, +}; + // http://www-wales.ch.cam.ac.uk/~wales/CCD/Thomson/table.html, random permutation -static const float charges[256][3] = { +// used as gradient vectors for noise3d +static const float charges3[256][3] = { 6.32096444e-01, -6.11406706e-01, 4.76062943e-01, 5.19172442e-01, 8.08229585e-01, -2.77893708e-01, -8.81072422e-01, -4.68301230e-01, 6.63727731e-02, -1.92122323e-01, 9.81341519e-01, -7.60505942e-03, -2.57478265e-01, 9.34157733e-01, -2.47091628e-01, 8.75501090e-01, -1.48087600e-01, -4.59965112e-01, @@ -156,177 +225,184 @@ -3.07350590e-01, -9.14677987e-01, 2.62487703e-01, 5.60298616e-01, 1.74821302e-01, 8.09631381e-01, }; -static vec2d -floor (vec2d v) +///////////////////////////////////////////////////////////////////////////// + +template +void +permutation::seed (seedable_rand_gen &rng) { - return vec2d (std::floor (v[0]), std::floor (v[1])); + for (int i = 0; i < N; ++i) + pmap[i] = i; + + // fisher-yates to randomly perturb + for (int i = N; --i; ) + ::swap (pmap[i], pmap[rng (i + 1)]); } -static vec3d -floor (vec3d v) +template class permutation<256, uint8_t>; + +///////////////////////////////////////////////////////////////////////////// + +template +void +noise_gen_base::seed (seedable_rand_gen &rng) { - return vec3d (std::floor (v[0]), std::floor (v[1]), std::floor (v[2])); + for (int i = 0; i < array_length (rvmap); ++i) + rvmap[i].seed (rng); } -noise_gen::noise_gen (uint32_t seed) +template +void +noise_gen_base::seed (seed_t seed) { seedable_rand_gen rng (seed); -#if 1 - for (int i = 0; i < 256; ++i) - { - vec2d rv (rng () - 0.5f, rng () - 0.5f); - - // normalise - float mag = 1.f / sqrtf (dot (rv, rv)); - - rv[0] *= mag; - rv[1] *= mag; - - rvec[i] = rv; - } -#endif - -#if 0 - float offset = rng () * 3.14159265; - - for (int i = 0; i < 256; ++i) - { - float phi = i * (3.14159265 * 2 / 256) + offset; - - rvec[i][0] = sinf (phi); - rvec[i][1] = -cosf (phi); - } - - // fisher-yates to randomly perturb - for (int i = 256; --i; ) - ::swap (rvec [i], rvec [rng (i + 1)]); -#endif - - rvmap[0].seed (rng); - rvmap[1].seed (rng); + this->seed (rng); } +template<> vec2d::T_numtype -noise_gen::operator() (vec2d P) +noise_gen_base::operator() (vec2d P, uint32_t seed) { vec2d I = floor (P); vec2d F = P - I; - float v = 0; + value_t v = 0; + + uint8_t i1 = uint8_t (I[1]) ^ (seed >> 16); + uint8_t i0 = uint8_t (I[0]) ^ (seed >> 8); for (int j = -1; j <= 2; ++j) - for (int i = -1; i <= 2; ++i) - { - vec2d A = F - vec2d (i, j); + { + uint8_t h1 = rvmap[1](i1 + j) ^ seed; - float d = dot (A, A); - - if (d < 4) - { - float t1 = 1 - d / 4; - float t2 = t1 * t1; - float t4 = t2 * t2; - - float p = (4 * t1 - 3) * t4; - - int h = rvmap [0](I[0] + i) ^ rvmap [1](I[1] + j); - vec2d G = rvec [h & 0xff]; - - v += dot (A, G) * p; - } - } + for (int i = -1; i <= 2; ++i) + { + vec2d A = F - vec2d (i, j); + value_t d = dot (A, A); + + if (d < 4) + { + value_t t1 = 1 - d / 4; + value_t t2 = t1 * t1; + value_t t4 = t2 * t2; + + value_t p = (4 * t1 - 3) * t4; + + uint8_t h = rvmap[0](i0 + i) ^ h1; + vec2d G = charges2[h & 0xff]; + + v += dot (A, G) * p; + } + } + } - return clamp (v, -.9999999f, .9999999f); + return v; } ///////////////////////////////////////////////////////////////////////////// -noise_gen::noise_gen (uint32_t seed) -{ - seedable_rand_gen rng (seed); - - rvmap [0].seed (rng); - rvmap [1].seed (rng); - rvmap [2].seed (rng); -} - +template<> vec3d::T_numtype -noise_gen::operator() (vec3d P) +noise_gen_base::operator() (vec3d P, uint32_t seed) { vec3d I = floor (P); vec3d F = P - I; - float v = 0; + uint8_t i2 = uint8_t (I[2]) ^ (seed >> 24); + uint8_t i1 = uint8_t (I[1]) ^ (seed >> 16); + uint8_t i0 = uint8_t (I[0]) ^ (seed >> 8); - for (int j = -1; j <= 2; ++j) - for (int i = -1; i <= 2; ++i) - for (int k = -1; k <= 2; ++k) + value_t v = 0; + + for (int k = -1; k <= 2; ++k) + { + uint8_t h2 = rvmap[2](i2 + k) ^ seed; + + for (int j = -1; j <= 2; ++j) { - vec3d A = F - vec3d (i, j, k); - float d = dot (A, A); + uint8_t h1 = rvmap[1](i1 + j) ^ h2; - if (d < 4) + for (int i = -1; i <= 2; ++i) { - float t1 = 1 - d / 4; - float t2 = t1 * t1; - float t4 = t2 * t2; + vec3d A = F - vec3d (i, j, k); + value_t d = dot (A, A); - // (4t⁵ - 3t⁴) - float p = (4 * t1 - 3) * t4; + if (d < 4) + { + value_t t1 = 1 - d / 4; + value_t t2 = t1 * t1; + value_t t4 = t2 * t2; - int h = rvmap[0](I[0] + i) ^ rvmap[1](I[1] + j) ^ rvmap[2](I[2] + k); - const float *G = charges[h & 0xff]; + // (4t⁵ - 3t⁴) + value_t p = (4 * t1 - 3) * t4; - v += dot (A, vec3d (G[0], G[1], G[2])) * p; + uint8_t h = rvmap[0](i0 + i) ^ h1; + const value_t *G = charges3[h & 0xff]; + + v += dot (A, vec3d (G[0], G[1], G[2])) * p; + } } } + } - return clamp (v * 2, -.9999999f, .9999999f); + return v * 2; } vec3d::T_numtype -noise_gen::operator() (vec3d P, vec3d N) +noise_gen::operator() (vec3d P, vec3d N, uint32_t seed) { vec3d I = floor (P); vec3d F = P - I; - float v = 0; + uint8_t i2 = uint8_t (I[2]) ^ (seed >> 24); + uint8_t i1 = uint8_t (I[1]) ^ (seed >> 16); + uint8_t i0 = uint8_t (I[0]) ^ (seed >> 8); - for (int j = -1; j <= 2; ++j) - for (int i = -1; i <= 2; ++i) - for (int k = -1; k <= 2; ++k) + value_t v = 0; + + for (int k = -1; k <= 2; ++k) + { + uint8_t h2 = rvmap[2](i2 + k) ^ seed; + + for (int j = -1; j <= 2; ++j) { - vec3d D = F - vec3d (i, j, k); - float e = dot (D, N); - float o = 1 - abs (e); + uint8_t h1 = rvmap[1](i1 + j) ^ h2; - if (o > 0) + for (int i = -1; i <= 2; ++i) { - vec3d A = D - e * N; - float d = dot (A, A); + vec3d D = F - vec3d (i, j, k); + value_t e = dot (D, N); + value_t o = 1 - abs (e); - if (d < 4) + if (o > 0) { - float t1 = 1 - d / 4; - float t2 = t1 * t1; - float t4 = t2 * t2; - - float o2 = o * o; - - // (4t⁵ - 3t⁴) * (3o³ - 2o²) - // alternative? ((o * 6 - 15) * o + 10) * o³ - float p = (4 * t1 - 3) * t4 * (3 * o2 - 2 * o2 * o); + vec3d A = D - e * N; + value_t d = dot (A, A); - int h = rvmap[0](I[0] + i) ^ rvmap[1](I[1] + j) ^ rvmap[2](I[2] + k); - const float *G = charges[h & 0xff]; + if (d < 4) + { + value_t t1 = 1 - d / 4; + value_t t2 = t1 * t1; + value_t t4 = t2 * t2; + + value_t o2 = o * o; + + // (4t⁵ - 3t⁴) * (3o³ - 2o²) + // alternative? ((o * 6 - 15) * o + 10) * o³ + value_t p = (4 * t1 - 3) * t4 * (3 * o2 - 2 * o2 * o); - v += dot (A, vec3d (G[0], G[1], G[2])) * p; + uint8_t h = rvmap[0](i0 + i) ^ h1; + const value_t *G = charges3[h & 0xff]; + + v += dot (A, vec3d (G[0], G[1], G[2])) * p; + } } } } + } - return clamp (v, -.9999999f, .9999999f); + return v; } template class noise_gen; @@ -335,66 +411,60 @@ ///////////////////////////////////////////////////////////////////////////// template -static vec_t -ith_octave (vec_t P, int i) +frac_gen::frac_gen (int octaves, value_t lacunarity, value_t hurst_expo, seed_t seed) +: octaves (octaves), lac (lacunarity), h (hurst_expo) { - vec_t r = P; - r[0] += i; - return r; -} + this->seed (seed); -template -frac_gen::frac_gen (value_t hurst_expo, value_t lacunarity) -: h (hurst_expo), lac (lacunarity), noise_gen (0) -{ value_t exsum = 0; + value_t phi = noise (vec_t (value_t (0))) * 0.5 + 1; - for (int i = 0; i < MAX_OCTAVES; ++i) + for (int i = 0; i < octaves; ++i) { - ex [i] = powf (lac, -h * i); + ex [i] = pow (lac, -h * i); exsum += ex [i]; - fbm_mul [i] = 0.5f / (exsum * 0.75f); // .75f is a heuristic - rot [i].set (0.4488f * i); + fbm_mul [i] = 0.5 / (exsum * 0.75); // .75 is a heuristic + rot [i].set (phi * i + 1); } } template typename frac_gen::value_t -frac_gen::fBm (vec_t P, int octaves) +frac_gen::fBm (vec_t P) { - value_t v = 0.f; + value_t v = 0; for (int i = 0; i < octaves; ++i) { rot [i](P); - v += noise (ith_octave (P, i)) * ex [i]; + v += noise (P, i) * ex [i]; P *= lac; } - return clamp (v * fbm_mul [octaves - 1] + 0.5f, 0.f, .9999999f); + return v * fbm_mul [octaves - 1]; } template typename frac_gen::value_t -frac_gen::turbulence (vec_t P, int octaves) +frac_gen::turbulence (vec_t P) { - value_t v = 0.f; + value_t v = 0; for (int i = 0; i < octaves; ++i) { rot [i](P); - v += abs (noise (ith_octave (P, i))) * ex [i]; + v += abs (noise (P, i)) * ex [i]; P *= lac; } - return clamp (v * fbm_mul [octaves - 1] * 2.f, 0.f, .9999999f); + return v * fbm_mul [octaves - 1] * (0.5 / noise_gen::abs_avg ()); } template typename frac_gen::value_t -frac_gen::multifractal (vec_t P, int octaves, value_t offset) +frac_gen::multifractal (vec_t P, value_t offset) { - value_t v = 1.f; + value_t v = 1; for (int i = 0; i < octaves; ++i) { @@ -403,52 +473,50 @@ P *= lac; } - return clamp (v * 0.5f, 0.f, .9999999f); + return v * value_t (0.5); } template typename frac_gen::value_t -frac_gen::heterofractal (vec_t P, int octaves, value_t offset) +frac_gen::heterofractal (vec_t P, value_t offset) { value_t v = noise (P) + offset; - int i; - for (i = 1; i < octaves; ++i) + for (int i = 1; i < octaves; ++i) { rot [i](P); P *= lac; v += v * (noise (P) * ex [i] + offset); } - return v / powf (2., octaves); + return v / (1 << octaves); } template typename frac_gen::value_t -frac_gen::hybridfractal (vec_t P, int octaves, value_t offset, value_t gain) +frac_gen::hybridfractal (vec_t P, value_t offset, value_t gain) { value_t v = (noise (P) + offset) * ex [0]; value_t weight = v; - int i; - for (i = 1; i < octaves; ++i) + for (int i = 1; i < octaves; ++i) { rot [i](P); P *= lac; - min_it (weight, 1.f); + min_it (weight, 1); value_t sig = (noise (P) + offset) * ex [i]; v += weight * sig; weight *= gain * sig; } - return clamp (v * 0.5f + 0.5f, 0.f, .9999999f); + return v * value_t (0.5) + value_t (0.5); } template typename frac_gen::value_t -frac_gen::ridgedmultifractal (vec_t P, int octaves, value_t offset, value_t gain) +frac_gen::ridgedmultifractal (vec_t P, value_t offset, value_t gain) { value_t sig = offset - abs (noise (P)); sig *= sig; @@ -459,7 +527,8 @@ rot [i](P); P *= lac; - value_t w = clamp (sig * gain, 0.f, 1.f); + // weight higher octaves by previous signal + value_t w = clamp (sig * gain, 0, 1); sig = offset - abs (noise (P)); sig *= sig; @@ -468,15 +537,33 @@ v += sig * ex [i]; } - return clamp (v * 0.25f, 0.f, .9999999f); + return v * value_t (0.25); +} + +template +typename frac_gen::value_t +frac_gen::billowfractal (vec_t P, value_t offset, value_t gain) +{ + value_t v = 0; + + offset += 2 * noise_gen::abs_avg () - 1; + + for (int i = 0; i < octaves; ++i) + { + rot [i](P); + v += (abs (noise (P, i)) * gain - offset) * ex [i]; + P *= lac; + } + + return v; } // http://www.gamasutra.com/view/feature/3098/a_realtime_procedural_universe_.php?page=2 template typename frac_gen::value_t -frac_gen::terrain (vec_t P, int octaves) +frac_gen::terrain (vec_t P) { - value_t v = 0.f; + value_t v = 0; for (int i = 0; i < octaves; ++i) { @@ -487,28 +574,28 @@ v *= fbm_mul [octaves - 1]; - return v <= 0.f ? - powf (-v, 0.7f) : powf (v, 1. + noise (P) * v); + return v <= 0 ? - pow (-v, 0.7) : pow (v, 1 + noise (P) * v); } template typename frac_gen::value_t -frac_gen::terrain2 (vec_t P, int octaves) +frac_gen::terrain2 (vec_t P) { - value_t a = fBm (P, octaves); - value_t b = ridgedmultifractal (P, octaves, 1, 8); - value_t fade = fBm (P + vec_t(10.3), octaves); + value_t a = fBm (P); + value_t b = ridgedmultifractal (P, 1, 8); + value_t fade = fBm (P + vec_t(10.3)); - const value_t width = 0.05f; + const value_t width = 0.05; - if (fade > 0.5f + width) + if (fade > 0.5 + width) return a; - else if (fade < 0.5f - width) + else if (fade < 0.5 - width) return b; - fade = (fade - 0.5f + width) / (width * 2); + fade = (fade - 0.5 + width) / (width * 2); // sigmoidal curve - fade = fade * fade * 2 * (1.5f - fade); + fade = fade * fade * 2 * (1.5 - fade); return a * fade + b * (1 - fade); } @@ -518,56 +605,146 @@ ///////////////////////////////////////////////////////////////////////////// -#if 0 -void hack(); void hack() +void noise_test (); +void noise_test () { - frac_gen gen (0.5, 2); - frac_gen gen3; + frac2d gen; -#if 0 + frac2d vec_gen1 (4, 2, 0.5, 1); + frac2d vec_gen2 (4, 2, 0.5, 2); + +#if 1 int N = 1024; - printf ("P5 %d %d 255\n", N, N); + printf ("P6 %d %d 255\n", N, N); // pmake&&server/deliantra-server >x&&convert -depth 8 -size 512xx512 gray:x x.ppm&& cv x.ppm for (int y = 0; y < N; ++y) { if (!(y&63))fprintf (stderr, "y %d\n", y);//D for (int x = 0; x < N; ++x) { - //putc (127 * n.noise (x * 0.1, y * 0.1, 0, 0,0,1) + 128, stdout); + vec2d P = vec2d (x, y) * (25000.f / N); + + //putc (127 * gen.noise (vec2d (x * 0.01, y * 0.01)) + 128, stdout); //putc (256 * gen.terrain2 (x * 0.004, y * 0.004, 8), stdout); - //putc (256 * gen.fBm (x * 0.01, y * 0.01, 3), stdout); - //putc (256 * gen.turbulence (x * 0.004 - 1, y * 0.004 - 1, 8), stdout); - //putc (256 * gen.heterofractal (x * 0.008, y * 0.008, 8, 0.9), stdout); + //putc (256 * gen.fBm (vec2d(x * 0.01, y * 0.01), 16), stdout); + //putc (256 * gen.turbulence (vec2d (x * 0.004 - 1, y * 0.004 - 1), 10), stdout); + //putc (256 * gen.heterofractal (vec2d (x * 0.008, y * 0.008), 8, 0.9), stdout); // mountais or somesuch(?) - //putc (256 * gen.hybridfractal (x * 0.01, y * 0.01, 8, -.4, -4), stdout); + //putc (256 * gen.hybridfractal (vec2d (x * 0.01, y * 0.01), 8, -.4, -4), stdout); // temperature - //putc (256 * gen.fBm (x * 0.002, y * 0.002, 2), stdout); + //putc (256 * gen.fBm (vec2d (x * 0.002, y * 0.002), 2), stdout); // rain - //putc (256 * gen.ridgedmultifractal (x * 0.01, y * 0.01, 3, 1.03, 2), stdout); + + float continent; + + { + const float continent_scale = 0.00008; + + vec2d perturb ( + vec_gen1.fBm (P * 0.0004), + vec_gen2.fBm (P * 0.0004) + ); + + const float W = 1000 * continent_scale; + const float N = (25000 - 1) * continent_scale; + + static frac2d perturb_gen (4, 2, 0.5, 3); + float perturb_perturb = gen.fBm (P * 0.0004); + perturb_perturb = perturb_perturb * perturb_perturb * 0.004; + + vec2d P_perturb = P * continent_scale + perturb * min (W, gen.noise (P * perturb_perturb) * W * 8); + + static frac2d continent_gen (13, 2.13, 0.5); + continent = continent_gen.fBm (P_perturb) + 0.05f; + + float border = W; // within n places of the border + + min_it (border, P_perturb [0]); + min_it (border, N - P_perturb [0]); + min_it (border, P_perturb [1]); + min_it (border, N - P_perturb [1]); + + continent = blend (-1.f, continent, border, 0.f, W); + } + + vec3d c (1, 1, 1); + float v; + + if (continent < 0) + { + // ocean + + v = min (continent * 10, -0.2f); + c = vec3d (0, 0, 1); + } + else + { + // continent + + // big rivers + static frac2d river_gen (2); + float river1 = river_gen.fBm (P * 0.0004);// - (P[0] / 25000) * 0.18 + 0.06; + float river2 = river_gen.ridgedmultifractal (P * 0.04 + vec2d (3, 5), 0.8, 10) - (P[1] / 25000) * 0.1; + + if (river1 > 0.05f) + { + v = -0.1f; + c = vec3d (0.4, 0.4, 1); + } + else if (river1 > 0.08f && river2 > 0.1f) + { + v = -0.05f; + c = vec3d (0.4, 0.4, 1); + } + else + { + river1 -= 0.07f; + + //c = river1 > 0 ? vec3d (0.8, 0.8, 0) : vec3d (0.8, 0, 0); + c = blend0 (vec3d (0.8, 0, 0), vec3d (0.8, 0.8, 0), river1, 0.01f);; + + static frac2d mountain_gen (8, 2.14, 0.5); + float mountain = mountain_gen.ridgedmultifractal (P * 0.004); + v = blend0 (mountain * 3 - 1, continent, river1, 0.05f); + } + + v=abs(river1) < 0.1; + c=vec3d(1,1,1); + } + + c *= v * 0.5 + 0.5; + + putc (clamp (255 * c[0], 0, 255), stdout); + putc (clamp (255 * c[1], 0, 255), stdout); + putc (clamp (255 * c[2], 0, 255), stdout); + + //cells + //putc (127.49 * gen.billowfractal (vec2d (x * 0.01, y * 0.01), 9) + 128, stdout); } } #else - int N = 512; + int N = 128; //printf ("P6 %d %d 255\n", N, N); // pmake&&server/deliantra-server >x&&convert -depth 8 -size 512xx512 gray:x x.ppm&& cv x.ppm + frac3d gen3 (3);; for (int z = 0; z < N; ++z) { if (!(z&7))fprintf (stderr, "z %d\n", z);//D for (int y = 0; y < N; ++y) for (int x = 0; x < N; ++x) { - float v = gen3.ridgedmultifractal (vec3d (x * 0.01 + 0.2, y * 0.01 + 0.2, z * 0.01 + 0.2), 3, 1.03, 2) * 2; + float v = gen3.ridgedmultifractal (vec3d (x * 0.001 + 0.2, y * 0.001 + 0.2, z * 0.01 + 0.2), 1.03, 2) * 2; #if 0 if (z < 64) v = v * (z * z) / (64 * 64); #endif - if (v <= 0.9999) + if (v <= 0.9) continue; float r[4]; @@ -592,4 +769,3 @@ exit (0); } -#endif