Graphing III: 
Graphics3D Primitives

Primitives

Graphics3D[{PointSize[.15],Point[{0,0,0}]}]

You can also use "Line", "Polygon", and "Text" in Graphics3D.

pieces=4;
Graphics3D[
	Table[		Polygon[{{Cos[t],Sin[t],0},{Cos[t+(2π)/pieces],Sin[t+(2π)/pieces],0},{0,0,2}}],{t,(2π)/pieces,2π,(2π)/pieces}]
	]

pieces=30;
Graphics3D[
	Prepend[
			Table[
		Polygon[{{Cos[t],Sin[t],0},
	{Cos[t+(2π)/pieces],Sin[t+(2π)/pieces],0},
	{0,0,2}}],
	{t,(2π)/pieces,2π,(2π)/pieces}],			Polygon[{{-1,-1,0},{1,-1,.5},{1,1,1},{-1,1,.5}}]]
	]

A new primitive is the "Cuboid"

Graphics3D[Cuboid[{0,0,0},{1,1,1}],Axes->True]

Graphics3D[		Table[Cuboid[{a=RandomReal[{-10,9}],b=RandomReal[{-10,9}],c=RandomReal[{-10,9}]},{a+1,b+1,c+1}],
			{50}],Axes->True]

An Example

ParametricPlot3D[{Cos[2π t],Sin[2 π t],t},{t,0,5.5}]

Graphics3D[		Table[{AbsoluteThickness[3],GrayLevel[1-(t/5.5)^2],Line[{{Cos[2π t],Sin[2π t],t},{Cos[2π(t+.01)],Sin[2π (t+.01)],t+.01}}]},{t,0,5.5-.01,.01}]
	,Axes->True,ViewPoint->{3.219, 0.069, 1.040},BoxRatios->{1,1,1}]