Ray Tracer Version 3.0

Ray Tracing, Version 3.0

Goal: Ray trace a scene where

the only objects in the scene are generic spheres, which may have been

scaled

translated

rotated with respected to an axis

in addition to color, the attributes of the generic sphere may include material values for diffuse, specular, ambient color

a positional light may be placed in the scene by specifying its position

the light has a diffuse, specular, and ambient component

a value for global ambient light may be assigned

the camera is set up

at position (eye_x, eye_y, eye_z),

looking at point (look_at_x, look_at_y, look_at_z), with

the original up-direction for the camera being <up_x, up_y, up_z>.

speed-up has been accomplished by more wisely computing the ray's direction, for each ray.

the scene (including camera information and sphere information) has been described in a file using Scene Description Language

Directory:

Set up a directory for Version 3.0 of your ray tracer, which will contain

driver program (rt_v3.0.cpp)
current version of ray tracing tools (header and implementation files)
current version of scene tools (header and implementation files)
scene description file

makefile

Ray Tracing Tools:

Make sure Point class has an operator overload for the subtraction operator, which returns a vector:
Vector operator - (Point secondPoint);
Make sure Vector class has the following:
Vector multiplyByMatrixTranspose(Matrix_4x4 M); // which returns the product of the transpose of M postmultiplied by this vectpr

Vector operator + (GLdoubleVector other);// which returns the sum of this vector and other vector

Make sure Primitive class has the following data field:
bool isMaterial; which is false if only using emissive color, true if using lighting
and change the constructor to initialize isMaterial to true.
Add these new classes and thoroughly test each:

class Light
{
public:

//methods:
Constructor, which initializes values

//data:
Color3 ambient, diffuse, specular;
Point pos; //position of light

}

class Material
{
public:

//methods:
Constructor, which initializes values
void set(Material source);

//data:
Color3 ambient, diffuse, specular, emissive;
float specularExponent;

}

Scene Tools:

Make changes to readScene so that it allows user to specify lights and materials. As we did with camera, we will use LIGHTS and ENDLIGHTS to bracket the info about lights and # as the marker between lights. See /classes/cs3114/RayTracing/Projects/Scenes/lighted_sphere.scn for example of how this will be done.
Make changes to shader so that it calculates the color according to the Phong method. See Adding Phong Shader under Blackboard->Course Documents for help.

Test File:

/classes/cs3114/RayTracing/Projects/Scenes/lighted_sphere.scn is a good one to test. It only has one generic sphere and one light. The rendered scene is in Blackboard->Gallery

Working Directory:

Make a subdirectory v3.0 in your Working Directory. When you have version 3.0 working correctly, copy all files pertaining to it, including the makefile, to that directory and don't touch it!

Submit:

Submit all files to directory v3