private void DrawHorizontalLine(IRenderTarget renderTarget, int y, int x1, int x2, Color color, Func <float, float, float> plan)
{
if (y >= 0 && y < renderTarget.Height)
{
if (x1 > x2)
{
Utils.Exchange(ref x1, ref x2);
}
if (x2 >= 0 && x1 < renderTarget.Width)
{
if (x1 < 0)
{
x1 = 0;
}
if (x2 >= renderTarget.Width)
{
x2 = renderTarget.Width - 1;
}
if (x1 <= x2)
{
for (int x = x1; x < x2; ++x)
{
float z = plan(x, y);
if (z > renderTarget.GetDepth(x, y))
{
renderTarget[x, y] = color;
renderTarget.SetDepth(x, y, z);
}
}
}
}
}
}