299 lines
9.0 KiB
C++
299 lines
9.0 KiB
C++
#include "image.hpp"
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#include "noise.hpp"
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#include "noise/fractal/fbm.hpp"
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#include "noise/fractal/hetero.hpp"
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#include "noise/fractal/hmf.hpp"
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#include "noise/fractal/rmf.hpp"
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#include "noise/fractal/runtime.hpp"
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#include "noise/lerp.hpp"
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#include "noise/basis/constant.hpp"
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#include "noise/basis/value.hpp"
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#include "noise/basis/perlin.hpp"
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#include "noise/basis/worley.hpp"
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#include "noise/turbulence.hpp"
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#include "noise/basis/runtime.hpp"
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#include "extent.hpp"
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#include "colour.hpp"
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#include "netpbm.hpp"
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#include "types.hpp"
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#include "cmdopt.hpp"
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///////////////////////////////////////////////////////////////////////////////
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template struct util::noise::fractal::fbm<float, util::noise::basis::perlin<float,util::lerp::cubic>>;
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template struct util::noise::fractal::hmf<float, util::noise::basis::value<float,util::lerp::cubic>>;
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template struct util::noise::fractal::rmf<float, util::noise::basis::constant<float>>;
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template struct util::noise::fractal::hetero<float, util::noise::basis::worley<float,2>>;
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///////////////////////////////////////////////////////////////////////////////
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enum basis_t {
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VALUE,
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PERLIN,
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WORLEY
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};
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//-----------------------------------------------------------------------------
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enum fractal_t {
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FBM,
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HMF,
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RMF,
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HETERO,
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};
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//-----------------------------------------------------------------------------
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enum lerp_t {
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LINEAR,
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CUBIC,
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QUINTIC,
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COSINE,
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TRUNC
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};
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//-----------------------------------------------------------------------------
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std::istream&
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operator>> (std::istream &is, basis_t &b)
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{
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std::string name;
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is >> name;
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b = name == "value" ? VALUE :
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name == "perlin" ? PERLIN :
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name == "worley" ? WORLEY :
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(is.setstate (std::istream::failbit), b);
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return is;
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}
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//-----------------------------------------------------------------------------
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std::ostream&
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operator<< (std::ostream &os, basis_t b)
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{
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switch (b) {
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case VALUE: os << "value"; return os;
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case PERLIN: os << "perlin"; return os;
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case WORLEY: os << "worley"; return os;
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default:
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unreachable ();
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}
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}
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//-----------------------------------------------------------------------------
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std::istream&
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operator>> (std::istream &is, fractal_t &f)
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{
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std::string name;
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is >> name;
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f = name == "fbm" ? FBM :
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name == "hmf" ? HMF :
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name == "rmf" ? RMF :
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name == "hetero" ? HETERO :
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(is.setstate (std::istream::failbit), f);
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return is;
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}
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//-----------------------------------------------------------------------------
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std::ostream&
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operator<< (std::ostream &os, fractal_t f)
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{
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switch (f) {
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case FBM: os << "fbm"; return os;
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case HMF: os << "hmf"; return os;
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case RMF: os << "rmf"; return os;
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case HETERO: os << "hetero"; return os;
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default:
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unreachable ();
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};
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}
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//-----------------------------------------------------------------------------
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std::istream&
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operator>> (std::istream &is, lerp_t &l)
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{
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std::string name;
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is >> name;
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l = name == "linear" ? LINEAR :
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name == "cubic" ? CUBIC :
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name == "quintic" ? QUINTIC :
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name == "cosine" ? COSINE :
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name == "trunc" ? TRUNC :
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(is.setstate (std::istream::failbit), l);
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return is;
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}
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//-----------------------------------------------------------------------------
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std::ostream&
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operator<< (std::ostream &os, lerp_t &l)
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{
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switch (l) {
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case LINEAR: os << "linear"; return os;
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case CUBIC: os << "cubic"; return os;
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case QUINTIC: os << "quintic"; return os;
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case COSINE: os << "cosine"; return os;
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case TRUNC: os << "trunc"; return os;
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default:
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unreachable ();
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}
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}
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///////////////////////////////////////////////////////////////////////////////
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int
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main (int argc, char **argv)
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{
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#ifndef ENABLE_DEBUGGING
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if (isatty (fileno (stdout))) {
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std::cerr << "cowardly refusing to dump binary data to console\n";
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return EXIT_FAILURE;
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}
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#endif
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// setup default variables
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#ifdef ENABLE_DEBUGGING
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util::extent2u res {320, 240};
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#else
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util::extent2u res {1920, 1080};
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#endif
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uint64_t seed = time (nullptr);
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basis_t basis = PERLIN;
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fractal_t fractal = FBM;
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lerp_t lerp = QUINTIC;
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unsigned octaves = 8;
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float H;
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float scale = 1.f;
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float turbulence = 0.f;
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// fill variables from arguments
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util::cmdopt::parser args;
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args.add<util::cmdopt::option::value<size_t>> ('w', "width", "output image width", res.w);
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args.add<util::cmdopt::option::value<size_t>> ('h', "height", "output image height", res.h);
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args.add<util::cmdopt::option::value<uint64_t>> ('s', "seed", "random seed", seed);
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args.add<util::cmdopt::option::value<basis_t>> ('b', "basis", "primary basis function", basis);
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args.add<util::cmdopt::option::value<fractal_t>> ('f', "fractal", "primary fractal function", fractal);
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args.add<util::cmdopt::option::value<lerp_t>> ('l', "lerp", "interpolation algorithm", lerp);
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args.add<util::cmdopt::option::value<unsigned>> ('o', "octaves", "total fractal iterations", octaves);
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args.add<util::cmdopt::option::value<float>> ('H', "hurst", "Hurst exponent", H);
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args.add<util::cmdopt::option::value<float>> ('x', "scale", "frequency multiplier", scale);
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args.add<util::cmdopt::option::value<float>> ('t', "turbulence","turbulence scale", turbulence);
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args.scan (argc, argv);
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std::cerr << "turbulence: " << turbulence << '\n';
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util::noise::turbulence<
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float,
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util::noise::fractal::runtime<
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float,
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util::noise::basis::runtime<float>
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>,
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util::noise::fractal::fbm<
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float,
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util::noise::basis::perlin<
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float,
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util::lerp::cubic
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>
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>
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> t (seed, { turbulence, turbulence });
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auto &f = t.data;
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switch (fractal) {
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using namespace util::noise;
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case FBM: f.reset<fractal::fbm <float,basis::runtime<float>>> (seed); break;
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case HMF: f.reset<fractal::hmf <float,basis::runtime<float>>> (seed); break;
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case RMF: f.reset<fractal::rmf <float,basis::runtime<float>>> (seed); break;
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case HETERO: f.reset<fractal::hetero<float,basis::runtime<float>>> (seed); break;
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default:
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unreachable ();
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}
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auto &b = f.basis ();
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switch (basis) {
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using namespace util::noise;
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case PERLIN: {
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switch (lerp) {
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case LINEAR: b.reset<basis::perlin<float,util::lerp::linear>> (seed); break;
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case CUBIC: b.reset<basis::perlin<float,util::lerp::cubic>> (seed); break;
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case QUINTIC: b.reset<basis::perlin<float,util::lerp::quintic>> (seed); break;
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case COSINE: b.reset<basis::perlin<float,util::lerp::cosine>> (seed); break;
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case TRUNC: b.reset<basis::perlin<float,util::lerp::trunc>> (seed); break;
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default:
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unreachable ();
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}
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break;
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}
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case VALUE: {
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switch (lerp) {
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case LINEAR: b.reset<basis::value<float,util::lerp::linear>> (seed); break;
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case CUBIC: b.reset<basis::value<float,util::lerp::cubic>> (seed); break;
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case QUINTIC: b.reset<basis::value<float,util::lerp::quintic>> (seed); break;
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case COSINE: b.reset<basis::value<float,util::lerp::cosine>> (seed); break;
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case TRUNC: b.reset<basis::value<float,util::lerp::trunc>> (seed); break;
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default:
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unreachable ();
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}
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break;
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}
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case WORLEY: {
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b.reset<util::noise::basis::worley<float>> (seed);
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break;
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}
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default:
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unreachable ();
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}
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t.seed (seed);
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f.octaves (octaves);
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f.frequency (scale / res.w);
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t.perturb[0].frequency ( scale / res.w);
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t.perturb[1].frequency ( scale / res.w);
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util::image::buffer<float> img (res);
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{
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// XXX: offset slightly to avoid origin artefacts in some basis functions
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auto offset = util::vector2f { -100 };
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for (size_t y = 0; y < res.h; ++y)
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for (size_t x = 0; x < res.w; ++x)
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img.data ()[y * img.s + x] = t (util::point2f {float (x), float (y)} + offset);
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}
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// rescale into the range [0, 1]
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auto range = std::minmax_element (img.begin (), img.end ());
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auto offset = *range.first;
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auto div = *range.second - *range.first;
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std::cerr << "range: [" << *range.first << ", " << *range.second << "]\n";
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std::transform (img.begin (), img.end (), img.begin (), [offset,div] (auto i) { return (i - offset) / div; });
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// write the images to disk
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util::pgm::write (img.cast<uint8_t> (), std::cout);
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}
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