public void draw_river(ref List <List <Tile> > grid, Random rGen,
Tile.Tile_Type deep_water_tiltyp,
Tile.Tile_Type shallows_tiltyp,
Tile.Tile_Type shoreline_tiltyp,
List <KeyValuePair <Tile.Tile_Type, Texture2D> > textureList)
{
//First determine whether it's a mostly horizontal or vertical river.
//Get differences.
int abs_xDif = Math.Abs(river_startCoord.x - river_endCoord.x);
int abs_yDif = Math.Abs(river_startCoord.y - river_endCoord.y);
int xDif = river_startCoord.x - river_endCoord.x;
int yDif = river_startCoord.y - river_endCoord.y;
//Get Vector points.
Vector2 end_position = new Vector2(river_endCoord.x * 32, river_endCoord.y * 32);
//Get pixel differences
double xPixels = xDif * 32;
double yPixels = yDif * 32;
gridCoordinate[,] dirs = { { new gridCoordinate(1, 0), new gridCoordinate(-1, 0) },
{ new gridCoordinate(0, 1), new gridCoordinate(0, -1) } };
int direct = 0;
gridCoordinate.coord xy = gridCoordinate.coord.xCoord;
if (abs_xDif > abs_yDif)
{
direct = 1;
xy = gridCoordinate.coord.yCoord;
}
Vector2 c_position = new Vector2(river_startCoord.x * 32, river_startCoord.y * 32);
double c_xvalue = c_position.X;
double c_yvalue = c_position.Y;
bool done = false;
gridCoordinate current_position = new gridCoordinate(-1, -1);
gridCoordinate previous_position = new gridCoordinate(-1, -1);
while (!done)
{
done = is_river_finished(c_xvalue, c_yvalue);
current_position = new gridCoordinate((int)(c_xvalue / 32), (int)(c_yvalue / 32));
if (!(current_position.x == previous_position.x && current_position.y == previous_position.y))
{
int[] rr = { rGen.Next(deepwater_thickness + 1),
rGen.Next(1, shallow_thickness + 1),
rGen.Next(1, banks_thickness + 1) };
int[] rEdge = new int[3];
rEdge[0] = current_position.get_a_coord(xy) + 1 + rr[0];
rEdge[1] = rEdge[0] + rr[1];
rEdge[2] = rEdge[1] + rr[2];
grid[current_position.x][current_position.y].set_tile_type(deep_water_tiltyp, textureList);
for (gridCoordinate i = new gridCoordinate(current_position);
i.get_a_coord(xy) < rEdge[2];
i.combineCoords(dirs[direct, 0]))
{
if (i.get_a_coord(xy) >= grid.Count)
{
break;
}
if (i.get_a_coord(xy) < rEdge[0])
{
grid[i.x][i.y].set_tile_type(deep_water_tiltyp, textureList);
}
else if (i.get_a_coord(xy) < rEdge[1])
{
grid[i.x][i.y].set_tile_type(shallows_tiltyp, textureList);
}
else
{
grid[i.x][i.y].set_tile_type(shoreline_tiltyp, textureList);
}
}
int[] lr = { rGen.Next(deepwater_thickness + 1),
rGen.Next(1, shallow_thickness + 1),
rGen.Next(1, banks_thickness + 1) };
int[] lEdge = new int[3];
lEdge[0] = current_position.get_a_coord(xy) - 1 - lr[0];
lEdge[1] = lEdge[0] - lr[1];
lEdge[2] = lEdge[1] - lr[2];
for (gridCoordinate i = new gridCoordinate(current_position);
i.get_a_coord(xy) > lEdge[2];
i.combineCoords(dirs[direct, 1]))
{
if (i.get_a_coord(xy) < 0)
{
break;
}
if (i.get_a_coord(xy) > lEdge[0])
{
grid[i.x][i.y].set_tile_type(deep_water_tiltyp, textureList);
}
else if (i.get_a_coord(xy) > lEdge[1])
{
grid[i.x][i.y].set_tile_type(shallows_tiltyp, textureList);
}
else
{
grid[i.x][i.y].set_tile_type(shoreline_tiltyp, textureList);
}
}
}
Vector2 direction = end_position - c_position;
direction.Normalize();
c_xvalue += direction.X;
c_yvalue += direction.Y;
previous_position = current_position;
}
}
