Duplication in vertices:
	Think about a cube
		Each vertex is used how many times?
		It's made of triangles...
	element array buffers
		Let's make a cube!
	Can we get it right the first time?

We'll need an element array buffer
	A GL_ELEMENT_ARRAY_BUFFER
	Can use unsigned short if we want
		Unless our model has more than 65,535 vertices!
	Also glDrawElementsInstanced
	If we used the round_cube to start:  Don't need patches
		Triangles will be fine
		It was a tesselation shader demo

A disadvantage here:
	This makes it hard to make each side a different color!
	It's ok, we'll move on to textures anyway

Textures!
	A texture is an image applied to an object
	It allows more detailed specification of colors
	If you didn't need fancy colors, you don't need these

Simple and straitforward textures:
	Just a picture applied to something
	Some of you did this in Blender
	Same idea basically

Texture coordinate system
	Model coordinates are x, y, z
	Texture coordinates use u and v
		Range is 0.0 to 1.0
	Make these coordinates is called uv mapping
		Easy for a cube
		Not as easy for other shapes!

To put a texture on an object, we need:
	Model vertices (like before)
	Texture coordinates
	An actual texture
	We don't need colors if we're using textures
		No reason to waste memory, it's expensive!
	Remember to use glActiveTexture and glBindTexture when drawing