/// <summary>
/// Нахождение соответствующего пикселя на текстуре
/// </summary>
/// <param name="c1"></param>
/// <param name="c2"></param>
/// <param name="c3"></param>
/// <param name="a"></param>
/// <param name="b"></param>
/// <param name="g"></param>
/// <returns></returns>
private Color FindTexel(Vertex2D c1, Vertex2D c2, Vertex2D c3, double a, double b, double g)
{
var w = TextureMap.Width;
var h = TextureMap.Height;
var u = a * c1.U + b * c2.U + g * c3.U;
var v = a * (1 - c1.V) + b * (1 - c2.V) + g * (1 - c3.V);
var texel = TextureMap.GetPixel((int)(u * w), (int)(v * h));
return(texel);
}