nerdcruft/libcruft-util
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noise-tool: expose more parameters via commandline

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This commit is contained in:
Danny Robson 2015-08-28 21:09:21 +10:00
parent 47a80f4217
commit 13ef16e183
1 changed files with 24 additions and 5 deletions
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29
tools/noise.cpp
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@ -184,7 +184,11 @@ main (int argc, char **argv)
fractal_t fractal = FBM;
lerp_t lerp = QUINTIC;
unsigned octaves = 8;
float H;
float H = std::numeric_limits<float>::quiet_NaN ();
float lacunarity = std::numeric_limits<float>::quiet_NaN ();
float amplitude = std::numeric_limits<float>::quiet_NaN ();
float gain = std::numeric_limits<float>::quiet_NaN ();
float offset = std::numeric_limits<float>::quiet_NaN ();
float scale = 1.f;
float turbulence = 0.f;
unsigned single = 0;
@ -201,7 +205,11 @@ main (int argc, char **argv)
args.add<util::cmdopt::option::value<unsigned>> ('o', "octaves", "total fractal iterations", octaves);
args.add<util::cmdopt::option::count<unsigned>> ('1', "single", "single octave", single);
args.add<util::cmdopt::option::value<float>> ('H', "hurst", "Hurst exponent", H);
args.add<util::cmdopt::option::value<float>> ('G', "gain", "octave gain", gain);
args.add<util::cmdopt::option::value<float>> ('A', "amplitude", "base amplitude", amplitude);
args.add<util::cmdopt::option::value<float>> ('L', "lacunarity", "frequency multiplier", lacunarity);
args.add<util::cmdopt::option::value<float>> ('x', "scale", "frequency multiplier", scale);
args.add<util::cmdopt::option::value<float>> ('O', "offset", "hetero offset", offset);
args.add<util::cmdopt::option::value<float>> ('t', "turbulence", "turbulence scale", turbulence);
args.add<util::cmdopt::option::value<float>> ('W', "patch-width", "patch blur width", width);
@ -230,7 +238,12 @@ main (int argc, char **argv)
case FBM: f.reset<fractal::fbm <float,basis::runtime<float>>> (seed); break;
case HMF: f.reset<fractal::hmf <float,basis::runtime<float>>> (seed); break;
case RMF: f.reset<fractal::rmf <float,basis::runtime<float>>> (seed); break;
case HETERO: f.reset<fractal::hetero<float,basis::runtime<float>>> (seed); break;
case HETERO: {
auto &child = f.reset<fractal::hetero<float,basis::runtime<float>>> (seed);
if (!isnan (offset))
child.offset (offset);
break;
}
default:
unreachable ();
@ -285,6 +298,12 @@ main (int argc, char **argv)
t.seed (seed);
f.octaves (octaves);
f.frequency (scale / res.w);
if (!std::isnan (H)) f.H (H);
if (!std::isnan (lacunarity)) f.lacunarity (lacunarity);
if (!std::isnan (amplitude)) f.amplitude (amplitude);
if (!std::isnan (gain)) f.gain (gain);
t.perturb[0].frequency ( scale / res.w);
t.perturb[1].frequency ( scale / res.w);
@ -321,11 +340,11 @@ main (int argc, char **argv)
// rescale into the range [0, 1]
auto range = std::minmax_element (img.begin (), img.end ());
auto offset = *range.first;
auto div = *range.second - *range.first;
auto inc = *range.first;
auto div = *range.second - *range.first;
std::cerr << '[' << *range.first << ',' << *range.second << "]\n";
std::transform (img.begin (), img.end (), img.begin (), [offset,div] (auto i) { return (i - offset) / div; });
std::transform (img.begin (), img.end (), img.begin (), [inc,div] (auto i) { return (i - inc) / div; });
// write the images to disk
util::pgm::write (img.cast<uint8_t> (), std::cout);