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[apps/shared] Change Zoom API

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Moved some code around to decrease redundancy and put more of the logic
into Poincare::Zoom

Change-Id: I4804cf39493ac7f2f0b3c4eb554e5c15c3cef1c9
This commit is contained in:
Gabriel Ozouf
2020-10-13 12:19:26 +02:00
committed by Émilie Feral
parent 8572f4953c
commit 6be5e7d62c
11 changed files with 93 additions and 128 deletions
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31
apps/shared/function.cpp
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@@ -80,26 +80,19 @@ Function::RecordDataBuffer * Function::recordData() const {
return reinterpret_cast<RecordDataBuffer *>(const_cast<void *>(d.buffer));
}
void Function::protectedRangeForDisplay(float * xMin, float * xMax, float * yMin, float * yMax, Poincare::Context * context, bool boundByMagnitude) const {
Zoom::ValueAtAbscissa evaluation = [](float x, Context * context, const void * auxiliary) {
/* When evaluating sin(x)/x close to zero using the standard sine function,
* one can detect small variations, while the cardinal sine is supposed to be
* locally monotonous. To smooth our such variations, we round the result of
* the evaluations. As we are not interested in precise results but only in
* ordering, this approximation is sufficient. */
constexpr float precision = 1e-5;
return precision * std::round(static_cast<const Function *>(auxiliary)->evaluateXYAtParameter(x, context).x2() / precision);
};
bool fullyComputed = Zoom::InterestingRangesForDisplay(evaluation, xMin, xMax, yMin, yMax, tMin(), tMax(), context, this);
evaluation = [](float x, Context * context, const void * auxiliary) {
return static_cast<const Function *>(auxiliary)->evaluateXYAtParameter(x, context).x2();
};
if (fullyComputed) {
Zoom::RefinedYRangeForDisplay(evaluation, *xMin, *xMax, yMin, yMax, context, this, boundByMagnitude);
void Function::protectedFullRangeForDisplay(float tMin, float tMax, float tStep, float * min, float * max, Poincare::Context * context, bool xRange) const {
Poincare::Zoom::ValueAtAbscissa evaluation;
if (xRange) {
evaluation = [](float x, Poincare::Context * context, const void * auxiliary) {
return static_cast<const Function *>(auxiliary)->evaluateXYAtParameter(x, context).x1();
};
} else {
Zoom::RangeWithRatioForDisplay(evaluation, InteractiveCurveViewRange::NormalYXRatio(), xMin, xMax, yMin, yMax, context, this);
evaluation = [](float x, Poincare::Context * context, const void * auxiliary) {
return static_cast<const Function *>(auxiliary)->evaluateXYAtParameter(x, context).x2();
};
}
Poincare::Zoom::FullRange(evaluation, tMin, tMax, tStep, min, max, context, this);
}
}