unsigned char PreviewMinimap::CalcShading(const MapPoint pt, const std::vector<unsigned char>& altitudes) const
{
int altitude = altitudes[GetMMIdx(pt)];
MapPoint tmp = MakeMapPoint(GetNeighbour(Point<int>(pt), Direction::NORTHEAST), map_width, map_height);
int A = altitudes[GetMMIdx(tmp)] - altitude;
tmp = MakeMapPoint(GetNeighbour2(Point<int>(pt), 0), map_width, map_height);
int B = altitudes[GetMMIdx(tmp)] - altitude;
tmp = MakeMapPoint(GetNeighbour(Point<int>(pt), Direction::WEST), map_width, map_height);
int C = altitudes[GetMMIdx(tmp)] - altitude;
tmp = MakeMapPoint(GetNeighbour2(Point<int>(pt), 7), map_width, map_height);
int D = altitudes[GetMMIdx(tmp)] - altitude;
int shadingS2 = 64 + 9 * A - 3 * B - 6 * C - 9 * D;
if(shadingS2 > 128)
shadingS2 = 128;
else if(shadingS2 < 0)
shadingS2 = 0;
return shadingS2;
}
/**
* Zeichnet die MapPreview
*/
void ctrlIngameMinimap::Draw_()
{
DrawMap(minimap);
// Mittleren Punkt berechnen und dort hinscrollen
Position middlePt = (gwv.GetLastPt() + gwv.GetFirstPt()) / 2;
// Koordinaten korrigieren
DrawPoint middle_corrected(MakeMapPoint(middlePt, minimap.GetMapSize()));
// Scroll-Auswahl-Bild holen
glArchivItem_Bitmap* image = LOADER.GetMapImageN(23);
// Position (relativ zum angezeigten Anfang der Karte) berechnen
DrawPoint pos = middle_corrected * DrawPoint(GetCurMapSize()) / DrawPoint(minimap.GetMapSize()) + DrawPoint(2, 2);
// Scroll-Auswahl-Bild an den Rändern verkleinern, damit es nicht über die Karte "überlappt"
DrawPoint srcOffset(0, 0);
Extent drawSize(image->getWidth(), image->getHeight());
DrawPoint originOffset = pos - image->GetOrigin();
// überlappung am linken Rand?
if(originOffset.x < 0)
{
srcOffset.x = -originOffset.x;
drawSize.x += originOffset.x;
pos.x = image->getNx();
}
// überlappung am oberen Rand?
if(originOffset.y < 0)
{
srcOffset.y = -originOffset.y;
drawSize.y += originOffset.y;
pos.y = image->getNy();
}
// überlappung am rechten Rand?
DrawPoint overDrawSize = pos - image->GetOrigin() + DrawPoint(image->GetSize()) - DrawPoint(GetCurMapSize());
if(overDrawSize.x >= 0)
drawSize.x -= overDrawSize.x;
// überlappung am unteren Rand?
if(overDrawSize.y >= 0)
drawSize.y -= overDrawSize.y;
// Zeichnen
image->DrawPart(Rect(GetMapDrawArea().getOrigin() + pos, drawSize), srcOffset);
}
