======== Final Exam Review ========

Thursday Practical Exam 20%
	Exercises
	Textures, light, particle flow

Theory Exam 10%
	Conceptual questions
	1. Structure of OpenGL - Display function, idle function, keyboard and mouse function, main function
	2. Linear transformation - Point 3D, vector, rotatio, translate, scale) from glm library
	3. Intro to 3d graphics - Rendering: It's a mapping between 3d to 2d
		"What is rendering?"
		Rendering means converting the 3d world to the 2nd world
		-
		Rendering pipeline - Rendering pipeline takes 3d points and outputs 2d points
			Pipelines have shaders
			There are two required shaders: Vertex shader and fragment shader
			- An example of an arbitrary shader: Geometry shader. These are optional.
			- Shader is a program. "Who is compiling the Shader?": Shaders are compiled by the graphic card driver.
				Target processesor is the GPU

	4. Developing a 3d Application
		- Setup Pipeline
		- Setup Geometries
		- Setup Transformations
		- Push the "render" button: glDrawArrays()
			"Anything glDraw will push the pipeline in a different way"

	5. Texture Mapping (There are no questions about texture mapping in the theory exam)
		- You have a texture image and you have a geometry
		- You want to apply part of the image into the geometry
		- Origin is in the upper left corner
		"When you want to load a texture, these are the parameters"
		To apply texture:
			1. Load texture into VRAM
			2. Set texture parameters
			3. Set the active texture
			4. Apply texture to geometry (This happens in the fragment shader)
		(glGenTexture, glSetParam, glEnable)

	6. Game Engine Intro
		- Structure
		- SceneGraph
		- SceneNode
			- Transformation
			- Mesh
			- children
			- render() function which renders the SceneNode

	7. Light (Phong Model)
		- Phong model
			1. Ambient light
				- "Ambient light is the light applied to the scene but you cannot see the light source"
			2. Diffuse light
				- Positional light (Light source) or Directional light (Sun)
					- The difference between positional and directional light is the angle.
			3. Specular Light
				- The glaze on objects

		Color of the object depends on:
			- Color of light source
			- Material of the object
				(How does this material respond to the light?)
				Material on its own has different properties.
					- Roughness/Matte or Shininess
					- Color
			"If I apply a red light to a green material it will be black"
				Multiply the material by the light source to get the perceived color
		Increasing theta gets less brightness (Larger angle = less intense light)
			Intensity * cos(theta)
			PerceivedColor = Color * cos(theta)

	7 and 1/2. How to calculate normals
		You are given a plane and you want to calculate the normals
		- Divide the plane(quad) into two triangles
		- If you are given any geometry, break it down into triangles
		- Each vertex has the same normal
			Triangle:
			     c
			    / \
			   a---b
			   calculate the vector
			u = c - a
			v = b - a

			n = v cross u
			Normal is a vector that is perpendicular to a plane

	8. Particle Flow
		"What are the properties of particle flow"
		- Geometry
		- Spawn Time
		- Path
		- Spawn Source
		- Number of Particles
		- Texture
		- Age

Shaders:

Vertex shader is given xyz and applies transform, rotation, scale, then outputs xyz
Fragment shader is given (x,y), applies (rgb) to (x,y)

Project is due Sunday, December 9th