31 lines
945 B
C++
31 lines
945 B
C++
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#include "StarPerlinSelector.hpp"
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#include "StarRandom.hpp"
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namespace Star {
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char const* const PerlinSelector::Name = "perlin";
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PerlinSelector::PerlinSelector(Json const& config, TerrainSelectorParameters const& parameters)
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: TerrainSelector(Name, config, parameters) {
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RandomSource random(parameters.seed);
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auto type = PerlinTypeNames.getLeft(config.getString("function"));
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auto octaves = config.getFloat("octaves");
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auto freq = config.getFloat("freq");
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auto amp = config.getFloat("amp");
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auto bias = config.getFloat("bias", 0.0f);
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auto alpha = config.getFloat("alpha", 2.0f);
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auto beta = config.getFloat("beta", 2.0f);
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function = PerlinF(type, octaves, freq, amp, bias, alpha, beta, random.randu64());
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xInfluence = config.getFloat("xInfluence", 1.0f);
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yInfluence = config.getFloat("yInfluence", 1.0f);
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}
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float PerlinSelector::get(int x, int y) const {
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return function.get(x * xInfluence, y * yInfluence);
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}
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}
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