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61 lines
2.9 KiB
C++
61 lines
2.9 KiB
C++
#include "storage_cartesian_function.h"
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#include "../shared/storage_expression_model_store.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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using namespace Poincare;
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using namespace Shared;
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namespace Graph {
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StorageCartesianFunction::StorageCartesianFunction(const char * text, KDColor color) :
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Shared::StorageFunction(text, color),
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m_displayDerivative(false)
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{
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}
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StorageCartesianFunction::StorageCartesianFunction(Ion::Storage::Record record) :
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Shared::StorageFunction(record, KDColorRed),
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m_displayDerivative(false)
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{
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// TODO set attributes from record
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}
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double StorageCartesianFunction::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(reducedExpression(context), 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 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 StorageCartesianFunction::sumBetweenBounds(double start, double end, Poincare::Context * context) const {
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Poincare::Integral integral(reducedExpression(context), Poincare::Float<double>(start), Poincare::Float<double>(end)); // Integral takes ownership of args
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/* TODO: when we approximate integral, we might want to simplify the integral
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* here. However, we might want to do it once for all x (to avoid lagging in
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* the derivative table. */
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return PoincareHelpers::ApproximateToScalar<double>(integral, *context);
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}
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Expression::Coordinate2D StorageCartesianFunction::nextMinimumFrom(double start, double step, double max, Context * context) const {
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return reducedExpression(context).nextMinimum(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit());
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}
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Expression::Coordinate2D StorageCartesianFunction::nextMaximumFrom(double start, double step, double max, Context * context) const {
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return reducedExpression(context).nextMaximum(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit());
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}
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double StorageCartesianFunction::nextRootFrom(double start, double step, double max, Context * context) const {
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return reducedExpression(context).nextRoot(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit());
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}
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Expression::Coordinate2D StorageCartesianFunction::nextIntersectionFrom(double start, double step, double max, Poincare::Context * context, const Shared::StorageFunction * function) const {
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Expression reducedExp = reducedExpression(context);
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return reducedExp.nextIntersection(symbol(), start, step, max, *context, Preferences::sharedPreferences()->angleUnit(), reducedExp);
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}
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}
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