CPSC 102-001 Computer Science II
(Advanced C Programming)
Fall 2010
09:05-09:55MW Daniel 415
Assignment 2

Objectives:
To implement and exercise the camera object

Due date:
09/27/10

What to hand in:
A tar.gz archive of your asg2/ directory, including:
  1. A README file containing
    1. Course id--section no
    2. Name
    3. Assignment description
    4. Brief solution description (e.g., program design, description of algorithm, etc., however appropriate).
    5. Lessons learned, identified interesting features of your program
    6. Any special usage instructions
  2. Makefile
  3. source code (.h headers and .c source)
  4. object code (do a make clean before tar)
How to hand in:
See handin notes

Description:
  1. Following the code developed pattern used so far, namely functions to initialize, load, print, and access objects, write the following functions: 
    void    camera_init(FILE*,camera_t**,int);
void    camera_load_attributes(FILE*, camera_t*);
void    camera_print(camera_t*,FILE*);
char*   camera_getname(camera_t*);

  2. Don't forget to include a pointer to the camera object in the model object struct, i.e., 
    typedef struct model_type
{
  camera_t      *cam;
  list_t        *mats;
  list_t        *objs;
} model_t;

  3. Your code should be such that the following main() routine works unaltered: 
    int main(int argc, char *argv[])
{
        model_t         *model;
        FILE            *model_file=NULL;

  if(argc != 2) {
    fprintf(stderr,"Usage: %s \n",argv[0]);
    exit(1);
  }

  // open model file
  if((model_file = fopen(argv[1],"r")) == NULL) {
     printf("Error opening input file: %s\n",argv[1]);
     return;
  }

  // create model
  model = model_init(model_file);

  // close file
  fclose(model_file);

  // verify that we have the model
  model_print(model);

  return(0);
}
  4. Sample input:
    camera cam1
{
   pixeldim 640 480
   worlddim 8   6
   viewpoint 4 3 6
}

material green
{
   ambient 0 5 0
}

material yellow
{
   ambient  5 4 0
   diffuse  4 4 0
  specular  1 1 1
}

plane leftwall
{
   material green
   normal 3 0 1
   point  0 0 0
}

plane rightwall
{
   material yellow
   normal -3 0 1
   point   8 0 0
}

material gray
{
   ambient 2 2 2
}

plane floor
{
   material gray
   normal 0 1 0
   point  0 -0.2 0
}
  5. Sample output (note that the output order of objects differs from the input, this is ok):
    loaded cam1 
loaded green 
loaded yellow 
loaded leftwall 
loaded rightwall 
loaded gray 
loaded floor 
camera cam1
{
   pixeldim 640 480
   worlddim   8   6
   viewpoint 4 3 6
}

material green
{
   ambient 0 5 0
}

material yellow
{
   ambient 5 4 0
   diffuse 4 4 0
  specular 1 1 1
}

material gray
{
   ambient 2 2 2
}

plane leftwall
{
   material green
   normal 3 0 1
   point  0 0 0
}

plane rightwall
{
   material yellow
   normal -3 0 1
   point  8 0 0
}

plane floor
{
   material gray
   normal 0 1 0
   point  0 -0.2 0
}