/// <summary>
/// Draws an ellipse with a specified color.
/// </summary>
internal void DrawEllipse(SpriteBatch batch, Rectangle rectangle, Color color, double scale = 1D)
{
EllipseConfiguration ellipse;
var checksum = EllipseConfiguration.GenerateChecksum(rectangle.Width, rectangle.Height);
if (_ellipseConfigs.ContainsKey(checksum))
{
ellipse = _ellipseConfigs[checksum];
}
else
{
ellipse = new EllipseConfiguration((int)Math.Ceiling(rectangle.Width / scale), (int)Math.Ceiling(rectangle.Height / scale));
_ellipseConfigs.Add(checksum, ellipse);
}
// Finally, draw the configuration:
ellipse.Draw(batch, rectangle, color);
}
/// <summary>
/// Creates a joined texture from multiple ellipses.
/// </summary>
/// <param name="outerWidth">The full width of the joined texture.</param>
/// <param name="outerHeight">The full height of the joined texture.</param>
/// <param name="ellipses">Ellipse defintion (size and fill color).</param>
public static Texture2D CreateJoined(int outerWidth, int outerHeight, SimpleEllipse[] ellipses)
{
// The objects at the same index in the ellipses and colors arrays are corresponding.
var colorArr = new Color[outerWidth * outerHeight];
var returnTexture = new Texture2D(GameInstanceProvider.Instance.GraphicsDevice, outerWidth, outerHeight);
// By default, the return texture is entirely transparent:
for (var i = 0; i < colorArr.Length; i++)
{
colorArr[i] = Color.Transparent;
}
// Loop through the ellipses and fill the color array with the ellipse colors:
for (var i = 0; i < ellipses.Length; i++)
{
var ellipse = ellipses[i];
var color = ellipses[i].FillColor;
var ellipseTextureData = EllipseConfiguration.GenerateTextureData(ellipse.Bounds.Width, ellipse.Bounds.Height);
for (var x = 0; x < ellipse.Bounds.Width; x++)
{
for (var y = 0; y < ellipse.Bounds.Height; y++)
{
var index = y * ellipse.Bounds.Width + x;
var colIndex = (y + ellipse.Bounds.Y) * outerWidth + (x + ellipse.Bounds.X);
// Only fill in when the ellipse's color is not transparent:
if (ellipseTextureData[index] != Color.Transparent)
{
colorArr[colIndex] = color;
}
}
}
}
returnTexture.SetData(colorArr);
return(returnTexture);
}
