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130 lines
3.2 KiB
C++
130 lines
3.2 KiB
C++
/*
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* MapViewModel.cpp, part of VCMI engine
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*
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* Authors: listed in file AUTHORS in main folder
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*
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* License: GNU General Public License v2.0 or later
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* Full text of license available in license.txt file, in main folder
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*
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*/
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#include "StdInc.h"
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#include "MapViewModel.h"
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#include "../../lib/int3.h"
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void MapViewModel::setTileSize(const Point & newValue)
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{
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tileSize = newValue;
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}
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void MapViewModel::setViewCenter(const Point & newValue)
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{
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viewCenter = newValue;
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}
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void MapViewModel::setViewDimensions(const Point & newValue)
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{
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viewDimensions = newValue;
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}
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void MapViewModel::setLevel(int newLevel)
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{
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mapLevel = newLevel;
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}
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Point MapViewModel::getSingleTileSizeUpperLimit() const
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{
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// arbitrary-seleted upscaling limit
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return Point(256, 256);
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}
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Point MapViewModel::getSingleTileSizeLowerLimit() const
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{
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// arbitrary-seleted downscaling limit
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return Point(4, 4);
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}
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Point MapViewModel::getSingleTileSize() const
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{
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return tileSize;
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}
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Point MapViewModel::getMapViewCenter() const
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{
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return viewCenter;
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}
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Point MapViewModel::getPixelsVisibleDimensions() const
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{
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return viewDimensions;
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}
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int MapViewModel::getLevel() const
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{
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return mapLevel;
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}
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Point MapViewModel::getTilesVisibleDimensions() const
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{
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// total number of potentially visible tiles is:
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// 1) number of completely visible tiles
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// 2) additional tile that might be partially visible from left/top size
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// 3) additional tile that might be partially visible from right/bottom size
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return {
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getPixelsVisibleDimensions().x / getSingleTileSize().x + 2,
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getPixelsVisibleDimensions().y / getSingleTileSize().y + 2,
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};
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}
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Rect MapViewModel::getTilesTotalRect() const
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{
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return Rect(
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Point(getTileAtPoint(Point(0,0))),
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getTilesVisibleDimensions()
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);
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}
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int3 MapViewModel::getTileAtPoint(const Point & position) const
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{
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Point topLeftOffset = getMapViewCenter() - getPixelsVisibleDimensions() / 2;
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Point absolutePosition = position + topLeftOffset;
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// NOTE: using division via double in order to use std::floor
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// which rounds to negative infinity and not towards zero (like integer division)
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return {
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static_cast<int>(std::floor(static_cast<double>(absolutePosition.x) / getSingleTileSize().x)),
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static_cast<int>(std::floor(static_cast<double>(absolutePosition.y) / getSingleTileSize().y)),
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getLevel()
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};
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}
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Point MapViewModel::getCacheDimensionsPixels() const
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{
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return getPixelsVisibleDimensions() + getSingleTileSizeUpperLimit() * 2;
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}
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Rect MapViewModel::getCacheTileArea(const int3 & coordinates) const
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{
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assert(mapLevel == coordinates.z);
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assert(getTilesVisibleDimensions().x + coordinates.x >= 0);
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assert(getTilesVisibleDimensions().y + coordinates.y >= 0);
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Point tileIndex{
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(getTilesVisibleDimensions().x + coordinates.x) % getTilesVisibleDimensions().x,
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(getTilesVisibleDimensions().y + coordinates.y) % getTilesVisibleDimensions().y
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};
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return Rect(tileIndex * getSingleTileSize(), getSingleTileSize());
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}
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Rect MapViewModel::getTargetTileArea(const int3 & coordinates) const
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{
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Point topLeftOffset = getMapViewCenter() - getPixelsVisibleDimensions() / 2;
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Point tilePosAbsolute = Point(coordinates) * getSingleTileSize();
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Point tilePosRelative = tilePosAbsolute - topLeftOffset;
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return Rect(tilePosRelative, getSingleTileSize());
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}
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