125 lines
3.5 KiB
C++
125 lines
3.5 KiB
C++
#ifndef temp_hpp
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#define temp_hpp
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#include "../vectorlogic/vec2.hpp"
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#include "../timing_decorator.hpp"
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#include <vector>
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#include <unordered_map>
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class Temp {
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private:
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protected:
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static Vec2 findClosestPoint(const Vec2& position, std::unordered_map<Vec2, Temp> others) {
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if (others.empty()) {
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return position;
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}
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auto closest = others.begin();
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float minDistance = position.distance(closest->first);
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for (auto it = std::next(others.begin()); it != others.end(); ++it) {
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float distance = position.distance(it->first);
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if (distance < minDistance) {
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minDistance = distance;
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closest = it;
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}
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}
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return closest->first;
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}
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public:
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float temp;
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float conductivity = 0.5;
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float specific_heat = 900.0;
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float diffusivity = 2000.0;
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Temp(float temp) : temp(temp) {
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};
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Temp(const Vec2& testPos, const std::unordered_map<Vec2, Temp>& others) {
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TIME_FUNCTION;
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float power = 2.0;
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float num = 0.0;
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float den = 0.0;
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for (const auto& [point, tempObj] : others) {
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float dist = testPos.distance(point);
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float weight = 1.0 / std::pow(dist, power);
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num += weight * tempObj.temp;
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den += weight;
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}
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if (den < 1e-10 && den > -1e-10) {
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den = 1e-10;
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}
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this->temp = num / den;
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}
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static float calTempIDW(const Vec2& testPos, const std::unordered_map<Vec2, Temp>& others) {
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TIME_FUNCTION;
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float power = 2.0;
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float num = 0.0;
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float den = 0.0;
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for (const auto& [point, temp] : others) {
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float dist = testPos.distance(point);
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float weight = 1.0 / std::pow(dist, power);
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num += weight * temp.temp;
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den += weight;
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}
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if (den < 1e-10 && den > -1e-10) {
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den = 1e-10;
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}
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return num / den;
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}
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static float calGrad(const Vec2& testPos, const std::unordered_map<Vec2, Temp>& others) {
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std::vector<std::pair<Vec2, float>> nearbyPoints;
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for (const auto& [point, temp] : others) {
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if (point.distance(testPos) <= 25) {
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nearbyPoints.emplace_back(point, temp.temp);
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}
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}
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float sumX, sumY, sumT, sumX2, sumY2, sumXY, sumXT, sumYT = 0;
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int n = nearbyPoints.size();
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for (const auto& [point, temp] : nearbyPoints) {
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float x = point.x - testPos.x;
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float y = point.y - testPos.y;
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sumX += x;
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sumY += y;
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sumT += temp;
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sumX2 += x * x;
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sumY2 += y * y;
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sumXY += x * y;
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sumXT += x * temp;
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sumYT += y * temp;
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}
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float det = sumX2 * sumY2 - sumXY * sumXY;
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if (std::abs(det) < 1e-10) {
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Vec2 calpoint = Vec2(0, 0); // Singular matrix, cannot solve
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}
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float a = (sumXT * sumY2 - sumYT * sumXY) / det;
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float b = (sumX2 * sumYT - sumXY * sumXT) / det;
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Vec2 calpoint = Vec2(a, b); // ∇T = (∂T/∂x, ∂T/∂y)
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Vec2 closest = findClosestPoint(testPos, others);
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Vec2 displacement = testPos - closest;
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float refTemp = others.at(closest).temp;
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float estimatedTemp = refTemp + (calpoint.x * displacement.x + calpoint.y * displacement.y);
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return estimatedTemp;
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}
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};
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#endif |