OpenTkEngine.Core.Graphics.FillRoundedRect C# (CSharp) Method

        public static void FillRoundedRect(float x, float y, float z, float width, float height, float radius, Color4 color)
        {
            if (radius <= 0)
            {
                FillRect(x, y, z, width, height, color);
                return;
            }
            Texture.BindNone();
            SetColor(color);
            if (radius > width / 2)
            {
                radius = width / 2;
            }
            if (radius > height / 2)
            {
                radius = height / 2;
            }

            FillCorner(x, y, z, radius, 0);
            FillCorner(x + width - radius, y, z, radius, MathHelper.DegreesToRadians(90));

            FillCorner(x, y + height - radius, z, radius, MathHelper.DegreesToRadians(-90));
            FillCorner(x + width - radius, y + height - radius, z, radius, (float)Math.PI);

            bool xRect = radius < width / 2;
            bool yRect = radius < height / 2;
            if (xRect)
            {
                FillRect(x + radius, y, z, width - (radius * 2), radius, color);
                FillRect(x + radius, y + height - radius, z, width - (radius * 2), radius, color);
            }
            if (yRect)
            {
                FillRect(x, y + radius, z, radius, height - (radius * 2), color);
                FillRect(x + width - radius, y + radius, z, radius, height - (radius * 2), color);
            }
            if (xRect && yRect)
                FillRect(x + radius, y + radius, z, width - (radius * 2), height - (radius * 2), color);
        }