30 lines
911 B
C++
30 lines
911 B
C++
#include "StarMixSelector.hpp"
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#include "StarInterpolation.hpp"
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namespace Star {
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char const* const MixSelector::Name = "mix";
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MixSelector::MixSelector(Json const& config, TerrainSelectorParameters const& parameters, TerrainDatabase const* database)
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: TerrainSelector(Name, config, parameters) {
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auto readSource = [&](Json const& sourceConfig) {
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String type = sourceConfig.getString("type");
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return database->createSelectorType(type, sourceConfig, parameters);
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};
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m_mixSource = readSource(config.get("mixSource"));
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m_aSource = readSource(config.get("aSource"));
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m_bSource = readSource(config.get("bSource"));
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}
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float MixSelector::get(int x, int y) const {
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auto f = clamp(m_mixSource->get(x, y), -1.0f, 1.0f);
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if (f == -1)
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return m_aSource->get(x, y);
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if (f == 1)
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return m_bSource->get(x, y);
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return lerp(f * 0.5f + 0.5f, m_aSource->get(x, y), m_bSource->get(x, y));
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}
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}
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