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[apps/graph] Reworked function caching

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Instead of being memoized all at once before display, functions values
are now stored at evaluation time. Fixed some quirks with caching
preparation.

Change-Id: I5d212c271c8c41a6dc9074a15c720f0bccf8ac40
This commit is contained in:
Gabriel Ozouf
2020-06-12 12:38:35 +02:00
committed by Émilie Feral
parent 42fcf557b8
commit 1bee23cf4f
8 changed files with 84 additions and 112 deletions
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17
apps/shared/continuous_function_cache.h
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@@ -15,12 +15,13 @@ public:
* function */
static constexpr int k_numberOfAvailableCaches = 2;
static void PrepareCache(void * f, void * ctx, void * cch, float tMin, float tStep);
static void PrepareForCaching(void * fun, ContinuousFunctionCache * cache, float tMin, float tStep);
ContinuousFunctionCache() { clear(); }
float step() const { return m_tStep; }
bool filled() const { return m_filled; }
void clear();
Poincare::Coordinate2D<float> valueForParameter(const ContinuousFunction * function, float t) const;
Poincare::Coordinate2D<float> valueForParameter(const ContinuousFunction * function, Poincare::Context * context, float t);
private:
/* The size of the cache is chosen to optimize the display of cartesian
* function */
@@ -29,14 +30,11 @@ private:
static float StepFactor(ContinuousFunction * function);
void invalidateBetween(int iInf, int iSup);
void setRange(ContinuousFunction * function, float tMin, float tStep);
void memoize(ContinuousFunction * function, Poincare::Context * context);
void memoizeYForX(ContinuousFunction * function, Poincare::Context * context);
void memoizeYForXBetweenIndices(ContinuousFunction * function, Poincare::Context * context, int iInf, int iSup);
void memoizeXYForT(ContinuousFunction * function, Poincare::Context * context);
float parameterForIndex(int i) const;
int indexForParameter(const ContinuousFunction * function, float t) const;
void pan(ContinuousFunction * function, Poincare::Context * context, float newTMin);
Poincare::Coordinate2D<float> valuesAtIndex(const ContinuousFunction * function, Poincare::Context * context, float t, int i);
void pan(ContinuousFunction * function, float newTMin);
float m_tMin, m_tStep;
float m_cache[k_sizeOfCache];
@@ -44,7 +42,6 @@ private:
* with cartesian functions. When dealing with parametric or polar functions,
* m_startOfCache should be zero.*/
int m_startOfCache;
bool m_filled;
};
}