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[curve_view] Add double evaluation

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Add the possibility to use a double-typed evaluator when tracing a
curve, useful when errors caused by float approximation mess with the
drawing.

Change-Id: I3ab410deec4823149239b0a26b1885fd2a493226
This commit is contained in:
Gabriel Ozouf
2020-10-20 17:12:15 +02:00
committed by LeaNumworks
parent c91c2a6e3f
commit 106916e7bf
3 changed files with 17 additions and 11 deletions
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7
apps/graph/graph/graph_view.cpp
View File

@@ -57,7 +57,12 @@ void GraphView::drawRect(KDContext * ctx, KDRect rect) const {
ContinuousFunction * f = (ContinuousFunction *)model;
Poincare::Context * c = (Poincare::Context *)context;
return f->evaluateXYAtParameter(t, c);
}, f.operator->(), context(), f->color(), true, record == m_selectedRecord, m_highlightedStart, m_highlightedEnd);
}, f.operator->(), context(), f->color(), true, record == m_selectedRecord, m_highlightedStart, m_highlightedEnd,
[](double t, void * model, void * context) {
ContinuousFunction * f = (ContinuousFunction *)model;
Poincare::Context * c = (Poincare::Context *)context;
return f->evaluateXYAtParameter(t, c);
});
/* Draw tangent */
if (m_tangent && record == m_selectedRecord) {
float tangentParameterA = f->approximateDerivative(m_curveViewCursor->x(), context());