36 lines
1.2 KiB
C++
36 lines
1.2 KiB
C++
#include "StarRidgeBlocksSelector.hpp"
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#include "StarRandom.hpp"
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namespace Star {
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char const* const RidgeBlocksSelector::Name = "ridgeblocks";
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RidgeBlocksSelector::RidgeBlocksSelector(Json const& config, TerrainSelectorParameters const& parameters)
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: TerrainSelector(Name, config, parameters) {
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commonality = parameters.commonality;
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amplitude = config.getFloat("amplitude");
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frequency = config.getFloat("frequency");
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bias = config.getFloat("bias");
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noiseAmplitude = config.getFloat("noiseAmplitude");
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noiseFrequency = config.getFloat("noiseFrequency");
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RandomSource random(parameters.seed);
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ridgePerlin1 = PerlinF(PerlinType::RidgedMulti, 2, frequency, amplitude, 0, 2.0f, 2.0f, random.randu64());
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ridgePerlin2 = PerlinF(PerlinType::RidgedMulti, 2, frequency, amplitude, 0, 2.0f, 2.0f, random.randu64());
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noisePerlin = PerlinF(1, noiseFrequency, noiseAmplitude, 0, 1.0f, 2.0f, random.randu64());
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}
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float RidgeBlocksSelector::get(int x, int y) const {
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if (commonality <= 0.0f) {
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return 0.0f;
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} else {
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x += noisePerlin.get(x, y);
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y += noisePerlin.get(y, x);
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return (ridgePerlin1.get(x, y) - ridgePerlin2.get(x, y)) * commonality + bias;
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}
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}
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}
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