private void plotTerrain(Terrain terrain,
int minPercent, int maxPercent,
int polygonLow, int polygonHigh)
{
int mininum = (WalkableTiles * minPercent) / 100;
int maximum = (WalkableTiles * maxPercent) / 100;
while (terrain.Count < mininum)
{
int centerX = getRandomXInsideIsland();
int centerY = getRandomYInsideIsland();
Polygon polygon = new RadialCirclePolygon(centerX, centerY,
polygonLow, polygonHigh);
terraformIfInside(grass, terrain, maximum, polygon);
}
}
/// <summary>
/// This function turns the square map entirely made out of grass into an island,
/// which is roughly square, but not completely.
/// </summary>
private void createMainIsland()
{
int size = (int)mapSize;
int minGrassTerrains = (int)(mapSize);
minGrassTerrains = minGrassTerrains * minGrassTerrains;
while (grass.Count < minGrassTerrains)
{
// Creates a jagged polygon (see RadialCirclePolygon), rougly centered around (0,0).
// Everything inside this polygon is turned into grass.
int range = size / 2;
double xc = RandomAid.NextFloatInRange(-range, range);
double yc = RandomAid.NextFloatInRange(-range, range);
double minimumRadius = size * 0.1;
double maximumRadius = size * 0.3;
Polygon polygon = new RadialCirclePolygon(xc, yc,
minimumRadius, maximumRadius);
// Check each tile to see if it's outside the polygon.
// First we check all the tiles in the outer layer.
// Then the ones in the layer inside that, and so on.
// So if we we reach maxGrassTerrains too fast, then
// the water will be evenly distributed around the map.
for (int y = (int)polygon.TopBound(); y <= polygon.BottomBound(); y++)
{
for (int x = (int)polygon.LeftBound(); x <= polygon.RightBound(); x++)
{
createGrass(polygon, x, y); // north
}
}
}
}