Ray Tracing

IMPORTANT NOTE

• For some input files, especially reflective ones, takes couple of minutes to be done. Please be patient, it will produce the ppm file :)

This program is to implement simple ray tracing algorithm. It takes an input file which obtains information about scene and produces ppm file according to input file. Input file should be given as command line argument. If you run this program on VS, then you can give command line argument as follows:

• Project Properties -> Debugging -> Command Arguments -> test1.in

Elements

  • sphere objects
  • solid colored objects
  • ambient, diffuse and specular shading
  • shadows
  • reflection

Input File

  • name_of_output_file.ppm
  • width(int) height(int)
  • (float) (float) (float) //camera's eye
  • (float) (float) (float) //camera's up
  • (float) (float) (float) //camera's at
  • (float) //fovy
  • number_of_light_sources ,then each successive line about light sources contains
  • x y z r g b a b c (all floats where (x,y,z) coordinate of light source,(r,g,b) RGB components of light source intensity and (a,b,c) of attenuation formula
  • number_of_pigments, then each successive line about pigments contains
  • solid(keyword) r g b (floats) // defines color of surface. For now, program only supports solid colors.
  • number_of_surfaces then each successive line about surfaces contains
  • ka(ambient coefficient) kd(diffuse coefficient) ks(specular coefficient) α(shineness) kr(reflectivity coefficient)
  • number_of_objects then each successive line about objects contains
  • sphere(keyword) x y z r // (x,y,z) center coordinates of object and r is radius For now, program only supports spheres.

Output File

• Output will be in the format of PPM P6 and can be viewed by GIMP

Dependencies

• Program should run in win32 environment.

Examples

• Test1
  
• Test2
  
• Test1 Reflective
  
• Test2 Reflective
  

Yaşar Can Kakdaş