/// <summary>
/// Checks pixel transparency at given coordinates
/// </summary>
/// <param name="x">x-coordinate of pixel</param>
/// <param name="y">y-coordinate of pixel</param>
/// <returns></returns>
public bool IsTransparentPixel(int x, int y)
{
if (OpacityMask != null)
{
int x1 = x * OpacityMask.Width / ImageSize.Width;
int y1 = y * OpacityMask.Height / ImageSize.Height;
if (TextureParams.WrapModeU == TextureWrapMode.Repeat)
{
x1 = Math.Abs(x1 % OpacityMask.Width);
}
else if (TextureParams.WrapModeU == TextureWrapMode.MirroredRepeat)
{
x1 = (x1 / OpacityMask.Width) % 2 == 0
? Math.Abs(x1 % OpacityMask.Width)
: OpacityMask.Width - Math.Abs(x1 % OpacityMask.Width);
}
if (TextureParams.WrapModeV == TextureWrapMode.Repeat)
{
y1 = Math.Abs(y1 % OpacityMask.Height);
}
else if (TextureParams.WrapModeV == TextureWrapMode.MirroredRepeat)
{
y1 = (y1 / OpacityMask.Height) % 2 == 0
? Math.Abs(y1 % OpacityMask.Height)
: OpacityMask.Height - Math.Abs(y1 % OpacityMask.Height);
}
return(!OpacityMask.TestPixel(x1, y1));
}
return(false);
}
/// <summary>
/// Checks pixel transparency at given coordinates
/// </summary>
/// <param name="x">x-coordinate of pixel</param>
/// <param name="y">y-coordinate of pixel</param>
/// <returns></returns>
public bool IsTransparentPixel(int x, int y)
{
if (OpacityMask != null)
{
int x1 = x * OpacityMask.Width / ImageSize.Width;
int y1 = y * OpacityMask.Height / ImageSize.Height;
return(!OpacityMask.TestPixel(x1, y1));
}
return(false);
}
