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[guides on map] intersection score viewport check is added

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This commit is contained in:
Arsentiy Milchakov 2020-05-06 21:26:35 +03:00 • committed by mpimenov
parent 8a1166c7f8
commit 19ee8cded0
1 changed files with 28 additions and 6 deletions
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34
map/guides_manager.cpp
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@ -9,6 +9,8 @@
#include "platform/preferred_languages.hpp"
#include "geometry/intersection_score.hpp"
#include "private.h"
#include <utility>
@ -33,17 +35,37 @@ void GuidesManager::SetStateListener(GuidesStateChangedFn const & onStateChanged
void GuidesManager::UpdateViewport(ScreenBase const & screen)
{
auto const zoom = df::GetDrawTileScale(screen);
// TODO(a): to implement correct way to filter out same rects.
if (m_currentRect.EqualDxDy(screen.GlobalRect(), 1e-4) && m_zoom == zoom)
if (m_zoom == zoom && m_currentRect.EqualDxDy(screen.GlobalRect(), 1e-4))
return;
if (m_state == GuidesState::Disabled || m_state == GuidesState::FatalNetworkError)
{
m_currentRect = screen.GlobalRect();
m_zoom = zoom;
return;
}
if (screen.GlobalRect().GetLocalRect().IsEmptyInterior())
return;
if (m_zoom == zoom && !m_currentRect.GetLocalRect().IsEmptyInterior())
{
m2::AnyRectD::Corners currentCorners;
m_currentRect.GetGlobalPoints(currentCorners);
m2::AnyRectD::Corners screenCorners;
screen.GlobalRect().GetGlobalPoints(screenCorners);
auto const score = geometry::GetIntersectionScoreForPoints(currentCorners, screenCorners);
// If more than 80% of viewport rect intersects with last requested rect then return.
if (score > 0.8)
return;
}
m_currentRect = screen.GlobalRect();
m_zoom = zoom;
if (m_state == GuidesState::Disabled || m_state == GuidesState::FatalNetworkError)
return;
RequestGuides(m_currentRect, m_zoom);
}