70 lines
2.4 KiB
C++
70 lines
2.4 KiB
C++
#include <hex/helpers/http_requests.hpp>
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#include <wolv/math_eval/math_evaluator.hpp>
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#include <imgui.h>
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#include <implot.h>
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#include <hex/ui/imgui_imhex_extensions.h>
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#include <fonts/codicons_font.h>
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namespace hex::plugin::builtin {
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void drawGraphingCalculator() {
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static std::array<long double, 1000> x, y;
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static std::string mathInput;
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static ImPlotRect limits;
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static double prevPos = 0;
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static long double stepSize = 0.1;
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if (ImPlot::BeginPlot("Function", ImVec2(-1, 0), ImPlotFlags_NoTitle | ImPlotFlags_NoMenus | ImPlotFlags_NoBoxSelect | ImPlotFlags_NoMouseText | ImPlotFlags_NoFrame)) {
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ImPlot::SetupAxesLimits(-10, 10, -5, 5, ImPlotCond_Once);
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limits = ImPlot::GetPlotLimits(ImAxis_X1, ImAxis_Y1);
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ImPlot::PlotLine("f(x)", x.data(), y.data(), x.size());
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ImPlot::EndPlot();
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}
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ImGui::PushItemWidth(-1);
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ImGuiExt::InputTextIcon("##graphing_math_input", ICON_VS_SYMBOL_OPERATOR, mathInput, ImGuiInputTextFlags_EnterReturnsTrue | ImGuiInputTextFlags_AutoSelectAll);
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ImGui::PopItemWidth();
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if ((prevPos != limits.X.Min && (ImGui::IsMouseReleased(ImGuiMouseButton_Left) || ImGui::GetIO().MouseWheel != 0)) || (ImGui::IsItemFocused() && ImGui::IsKeyPressed(ImGuiKey_Enter))) {
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wolv::math_eval::MathEvaluator<long double> evaluator;
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y = {};
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u32 i = 0;
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evaluator.setFunction("y", [&](auto args) -> std::optional<long double> {
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i32 index = i + args[0];
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if (index < 0 || u32(index) >= y.size())
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return 0;
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else
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return y[index];
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}, 1, 1);
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evaluator.registerStandardVariables();
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evaluator.registerStandardFunctions();
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stepSize = (limits.X.Size()) / x.size();
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for (i = 0; i < x.size(); i++) {
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evaluator.setVariable("x", limits.X.Min + i * stepSize);
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x[i] = limits.X.Min + i * stepSize;
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y[i] = evaluator.evaluate(mathInput).value_or(0);
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if (y[i] < limits.Y.Min)
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limits.Y.Min = y[i];
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if (y[i] > limits.Y.Max)
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limits.X.Max = y[i];
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}
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limits.X.Max = limits.X.Min + x.size() * stepSize;
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prevPos = limits.X.Min;
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}
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}
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} |