Shelby's Iron Brigade Brigade. The 3rd Brigade Combat Team, 1st Infantry Division was known as the Iron Brigade from its formation in 1917 through World War I, World War II and Vietnam, until some time in the early 2000s when, for reasons that are still unclear, the name was changed to Duke Brigade. The unit crest was an Iron Cross in a triangle, it appears that that was also changed. The 3rd Brigade of the 4th Infantry Division is also known as the Iron Brigade. Its unit crest is similar to the medals issued to veterans of the both Western and the Eastern
Bézier triangle Bézier triangle A Bézier triangle is a special type of Bézier surface, which is created by (linear, quadratic, cubic or higher degree) interpolation of control points. A general "n"th-order Bézier triangle has ("n" + 1)("n" + 2)/2 control points "a" "β" "γ" where "i", "j", "k" are nonnegative integers such that "i" + "j" + "k" = "n" . The surface is then defined as for all nonnegative real numbers "s" + "t" + "u" = 1. With linear order (formula_2), the resulting Bézier triangle is actually a regular flat triangle, with the triangle vertices equaling the three control points.