public AsteroidMap VisibilityMap(int stationRow, int stationCol)
{
// Create a map of what other asteroids are visible if i put a station on the inputted asteroid.
Asteroid station = new Asteroid(stationRow, stationCol, null);
AsteroidMap map = new AsteroidMap((string[])this.rows.Clone(), station);
station.map = map;
// If there is no asteroid in the inputted area, return null;
if (map.GetCell(stationRow, stationCol) != ASTEROID)
{
Console.WriteLine("ERROR! You asked for a visibility map for a location that has no asteroid.");
return(null);
}
// Logic:
// Look directly to the left of me, find the first asteroid, and consider everything else blocked.
// Look directly to the right of me, find the first asteroid, and consider everything else blocked.
// Look at the entire row above me. Find asteroids, and block everything behind it.
// And then move up a row.
// Look at the entire row below me. Find any asteroids, and block everything behind it.
for (int columnId = (stationCol - 1); columnId >= 0; columnId--)
{
int rowId = stationRow;
if (map.GetCell(rowId, columnId) == ASTEROID)
{
map.SetCellVisible(rowId, columnId, stationRow, stationCol);
// break;
}
}
for (int columnId = (stationCol + 1); columnId < this.mapWidth; columnId++)
{
int rowId = stationRow;
if (map.GetCell(rowId, columnId) == ASTEROID)
{
map.SetCellVisible(rowId, columnId, stationRow, stationCol);
//break;
}
}
for (int rowId = (stationRow - 1); rowId >= 0; rowId--)
{
for (int colId = 0; colId < this.mapWidth; colId++)
{
if (map.GetCell(rowId, colId) == ASTEROID)
{
map.SetCellVisible(rowId, colId, stationRow, stationCol);
//break;
}
}
}
for (int rowId = (stationRow + 1); rowId < this.mapHeight; rowId++)
{
for (int colId = 0; colId < this.mapWidth; colId++)
{
if (map.GetCell(rowId, colId) == ASTEROID)
{
map.SetCellVisible(rowId, colId, stationRow, stationCol);
//break;
}
}
}
return(map);
}
