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[apps/graph] Fixed cache step quirks

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Change-Id: I5b630301ab2a4b17a5a4d77c7d9a05120449e55e
This commit is contained in:
Gabriel Ozouf
2020-06-12 14:33:49 +02:00
committed by Émilie Feral
parent 1bee23cf4f
commit beb228fa78
4 changed files with 24 additions and 28 deletions
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10
apps/shared/continuous_function_cache.cpp
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@@ -7,6 +7,7 @@ namespace Shared {
constexpr int ContinuousFunctionCache::k_sizeOfCache;
constexpr float ContinuousFunctionCache::k_cacheHitTolerance;
constexpr int ContinuousFunctionCache::k_numberOfAvailableCaches;
constexpr int ContinuousFunctionCache::k_parametricStepFactor;
// public
void ContinuousFunctionCache::PrepareForCaching(void * fun, ContinuousFunctionCache * cache, float tMin, float tStep) {
@@ -44,13 +45,6 @@ Poincare::Coordinate2D<float> ContinuousFunctionCache::valueForParameter(const C
}
// private
float ContinuousFunctionCache::StepFactor(ContinuousFunction * function) {
/* When drawing a parametric or polar curve, the range is first divided by
* ~10,9, creating 11 intervals which are filled by dichotomy.
* We memoize 16 values for each of the 10 big intervals. */
return (function->plotType() == ContinuousFunction::PlotType::Cartesian) ? 1.f : 16.f;
}
void ContinuousFunctionCache::invalidateBetween(int iInf, int iSup) {
for (int i = iInf; i < iSup; i++) {
m_cache[i] = NAN;
@@ -59,7 +53,7 @@ void ContinuousFunctionCache::invalidateBetween(int iInf, int iSup) {
void ContinuousFunctionCache::setRange(ContinuousFunction * function, float tMin, float tStep) {
m_tMin = tMin;
m_tStep = tStep / StepFactor(function);
m_tStep = tStep;
}
int ContinuousFunctionCache::indexForParameter(const ContinuousFunction * function, float t) const {