egutierrez
4a95407d0e
- cpp/functions/gfx/gl_loader.{h,cpp,md}: mini loader para OpenGL 2.0+
(Linux no-op via GL_GLEXT_PROTOTYPES, Windows wglGetProcAddress)
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- CMakeLists: WIN32_EXECUTABLE para lanzar sin consola en Windows
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Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
56 lines
2.1 KiB
C++
56 lines
2.1 KiB
C++
#include "viz/bar_chart.h"
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#include "implot.h"
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#include <vector>
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namespace {
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// Plot bars con ejes pineados (no se mueven entre frames) y labels categoricos.
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// ImPlot por defecto auto-fitea Y en cada frame, lo que provoca oscilacion visual.
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// Lo resolvemos calculando y_max una vez y forzandolo con ImPlotCond_Always.
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template <typename T>
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void draw_bars(const char* title, const char* const* labels, const T* values,
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int count, double bar_width) {
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if (count <= 0) return;
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double y_max = 0.0;
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for (int i = 0; i < count; i++) {
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if (static_cast<double>(values[i]) > y_max) y_max = static_cast<double>(values[i]);
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}
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if (y_max <= 0.0) y_max = 1.0;
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y_max *= 1.15; // 15% headroom sobre la barra mas alta
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const ImPlotFlags plot_flags =
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ImPlotFlags_NoMenus | ImPlotFlags_NoBoxSelect | ImPlotFlags_NoMouseText;
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const ImPlotAxisFlags x_flags =
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ImPlotAxisFlags_NoMenus | ImPlotAxisFlags_Lock | ImPlotAxisFlags_NoGridLines;
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const ImPlotAxisFlags y_flags =
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ImPlotAxisFlags_NoMenus | ImPlotAxisFlags_Lock;
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if (ImPlot::BeginPlot(title, ImVec2(-1, 0), plot_flags)) {
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std::vector<double> positions(count);
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for (int i = 0; i < count; i++) positions[i] = i;
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ImPlot::SetupAxes(nullptr, nullptr, x_flags, y_flags);
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ImPlot::SetupAxisLimits(ImAxis_X1, -0.5, static_cast<double>(count) - 0.5,
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ImPlotCond_Always);
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ImPlot::SetupAxisLimits(ImAxis_Y1, 0.0, y_max, ImPlotCond_Always);
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ImPlot::SetupAxisTicks(ImAxis_X1, positions.data(), count, labels);
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ImPlot::PlotBars("##data", values, count, bar_width);
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ImPlot::EndPlot();
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}
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}
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} // namespace
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void bar_chart(const char* title, const char* const* labels, const float* values,
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int count, float bar_width) {
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draw_bars<float>(title, labels, values, count, static_cast<double>(bar_width));
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}
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void bar_chart(const char* title, const char* const* labels, const double* values,
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int count, double bar_width) {
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draw_bars<double>(title, labels, values, count, bar_width);
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}
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