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36 lines
1.4 KiB
C++
36 lines
1.4 KiB
C++
#include "trigonometry_graph_cell.h"
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using namespace Shared;
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using namespace Poincare;
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namespace Calculation {
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TrigonometryGraphView::TrigonometryGraphView(TrigonometryModel * model) :
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CurveView(model),
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m_model(model)
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{
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}
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void TrigonometryGraphView::drawRect(KDContext * ctx, KDRect rect) const {
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ctx->fillRect(rect, KDColorWhite);
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drawGrid(ctx, rect);
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drawAxes(ctx, rect);
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// Draw the circle
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drawCurve(ctx, rect, 0, 2.0f*M_PI, M_PI/180.0f, [](float t, void * model, void * context) {
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return Poincare::Coordinate2D<float>(std::cos(t), std::sin(t));
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}, nullptr, nullptr, true, Palette::GreyDark, false);
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// Draw dashed segment to indicate sine and cosine
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drawSegment(ctx, rect, Axis::Vertical, std::cos(m_model->angle()), 0.0f, std::sin(m_model->angle()), Palette::Red, 1, 3);
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drawSegment(ctx, rect, Axis::Horizontal, std::sin(m_model->angle()), 0.0f, std::cos(m_model->angle()), Palette::Red, 1, 3);
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// Draw angle position on the circle
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drawDot(ctx, rect, std::cos(m_model->angle()), std::sin(m_model->angle()), Palette::Red, true);
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// Draw graduations
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drawLabelsAndGraduations(ctx, rect, Axis::Vertical, false, true);
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drawLabelsAndGraduations(ctx, rect, Axis::Horizontal, false, true);
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// Draw labels
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drawLabel(ctx, rect, Axis::Vertical, std::sin(m_model->angle()), "sin(θ)", Palette::Red);
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drawLabel(ctx, rect, Axis::Horizontal, std::cos(m_model->angle()), "cos(θ)", Palette::Red);
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}
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}
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