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Code Issues Releases Activity

Fixed map view centering during scaling change

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This commit is contained in:
Ivan Savenko 2023-05-17 14:36:12 +03:00
parent 9e3bc87a6b
commit 7504ceb256
2 changed files with 20 additions and 7 deletions
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14
client/mapView/MapViewController.cpp
View File

@ -69,10 +69,19 @@ void MapViewController::setViewCenter(const Point & position, int level)
void MapViewController::setTileSize(const Point & tileSize)
{
Point oldSize = model->getSingleTileSize();
model->setTileSize(tileSize);
double scaleChangeX = 1.0 * tileSize.x / oldSize.x;
double scaleChangeY = 1.0 * tileSize.y / oldSize.y;
Point newViewCenter {
static_cast<int>(std::round(model->getMapViewCenter().x * scaleChangeX)),
static_cast<int>(std::round(model->getMapViewCenter().y * scaleChangeY))
};
// force update of view center since changing tile size may invalidated it
setViewCenter(model->getMapViewCenter(), model->getLevel());
setViewCenter(newViewCenter, model->getLevel());
}
void MapViewController::modifyTileSize(int stepsChange)
@ -101,7 +110,8 @@ void MapViewController::modifyTileSize(int stepsChange)
std::clamp(desiredZoom.y, minimal.y, maximal.y)
};
setTileSize(actualZoom);
if (actualZoom != currentZoom)
setTileSize(actualZoom);
}
MapViewController::MapViewController(std::shared_ptr<MapViewModel> model, std::shared_ptr<MapViewCache> view)

13
client/mapView/MapViewModel.cpp
View File

@ -35,12 +35,15 @@ void MapViewModel::setLevel(int newLevel)
Point MapViewModel::getSingleTileSizeUpperLimit() const
{
return Point(128, 128); // arbitrary-seleted upscaling limit
// arbitrary-seleted upscaling limit
// TODO: figure out reason behind graphical artifacts on scaling higher than 120px (375%)
return Point(120, 120);
}
Point MapViewModel::getSingleTileSizeLowerLimit() const
{
return Point(4, 4); // arbitrary-seleted upscaling limit
// arbitrary-seleted downscaling limit
return Point(4, 4);
}
Point MapViewModel::getSingleTileSize() const
@ -114,14 +117,14 @@ Rect MapViewModel::getCacheTileArea(const int3 & coordinates) const
(getTilesVisibleDimensions().y + coordinates.y) % getTilesVisibleDimensions().y
};
return Rect(tileIndex * tileSize, tileSize);
return Rect(tileIndex * getSingleTileSize(), getSingleTileSize());
}
Rect MapViewModel::getTargetTileArea(const int3 & coordinates) const
{
Point topLeftOffset = getMapViewCenter() - getPixelsVisibleDimensions() / 2;
Point tilePosAbsolute = Point(coordinates) * tileSize;
Point tilePosAbsolute = Point(coordinates) * getSingleTileSize();
Point tilePosRelative = tilePosAbsolute - topLeftOffset;
return Rect(tilePosRelative, tileSize);
return Rect(tilePosRelative, getSingleTileSize());
}