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62 lines
2.8 KiB
C++
62 lines
2.8 KiB
C++
#include "cartesian_function.h"
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#include "../shared/poincare_helpers.h"
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#include <float.h>
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#include <cmath>
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#include <poincare/derivative.h>
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#include <poincare/integral.h>
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using namespace Poincare;
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using namespace Shared;
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namespace Graph {
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CartesianFunction::CartesianFunction(const char * text, KDColor color) :
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Shared::Function(text, color),
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m_displayDerivative(false)
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{
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}
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bool CartesianFunction::displayDerivative() {
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return m_displayDerivative;
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}
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void CartesianFunction::setDisplayDerivative(bool display) {
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m_displayDerivative = display;
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}
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double CartesianFunction::approximateDerivative(double x, Poincare::Context * context) const {
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const char xUnknown[] = {Symbol::SpecialSymbols::UnknownX, 0};
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Poincare::Derivative derivative(expression(context).clone(), Symbol(xUnknown, 1), Poincare::Float<double>(x)); // derivative takes ownership of Poincare::Float<double>(x) and the clone of expression
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/* TODO: when we will approximate derivative, we might want to simplify the
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* derivative here. However, we might want to do it once for all x (to avoid
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* lagging in the derivative table. */
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return PoincareHelpers::ApproximateToScalar<double>(derivative, *context);
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}
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double CartesianFunction::sumBetweenBounds(double start, double end, Poincare::Context * context) const {
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Poincare::Integral integral(expression(context).clone(), Poincare::Float<double>(start), Poincare::Float<double>(end)); // Integral takes ownership of args
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/* TODO: when we will approximate integral, we might want to simplify the
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* integral here. However, we might want to do it once for all x (to avoid
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* lagging in the derivative table. */
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return PoincareHelpers::ApproximateToScalar<double>(integral, *context);
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}
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Expression::Coordinate2D CartesianFunction::nextMinimumFrom(double start, double step, double max, Context * context) const {
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return expression(context).nextMinimum(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit());
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}
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Expression::Coordinate2D CartesianFunction::nextMaximumFrom(double start, double step, double max, Context * context) const {
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return expression(context).nextMaximum(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit());
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}
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double CartesianFunction::nextRootFrom(double start, double step, double max, Context * context) const {
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return expression(context).nextRoot(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit());
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}
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Expression::Coordinate2D CartesianFunction::nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, const Shared::Function * function) const {
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return expression(context).nextIntersection(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit(), function->expression(context));
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}
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}
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