src/main.cpp File Reference

#include <iostream>
#include "render.hpp"
#include "cs296_base.hpp"
#include "callbacks.hpp"
#include <sys/time.h>
#include "GL/glui.h"
#include <cstdio>

Include dependency graph for main.cpp:

Go to the source code of this file.

Namespaces
namespace	cs296
	These are user defined include files Included in double quotes - the path to find these has to be given at compile time.
Functions
void	average_time (int32 no_of_steps)
	Function to compute the average time for 100 iterations.
int	main (int argc, char **argv)
	This is the main function.

---

Function Documentation

void average_time

(

int32

no_of_steps

)

Function to compute the average time for 100 iterations.

Used to determine duration of function calls.

Definition at line 69 of file main.cpp.

                                    { 
    // settings_hz from callbacks.cpp  
    float32 step_size=1/settings_hz; 
   
    b2World* world = test->get_world(); 
    
    const b2Profile& world_profile = world->GetProfile(); 
    int32 step_Count=0; 
    
    float32 time_taken_for_step=0.0000;
    float32 time_taken_for_velocity_update=0.0000;
    float32 time_taken_for_collisions=0.0000;
    float32 time_taken_for_position_update=0.0000;
    
    struct timeval start, end;
    gettimeofday(&start,NULL);
    double t1 = 1000*(start.tv_sec) + start.tv_usec/1000.0;
    
    while (step_Count<no_of_steps)
    { 
        // Step function for Simulation in Box2D world.
        world->Step(step_size, settings.velocity_iterations, settings.position_iterations);     
        time_taken_for_step +=world_profile.step;
        time_taken_for_velocity_update += world_profile.solveVelocity;
        time_taken_for_collisions += world_profile.collide;
        time_taken_for_position_update += world_profile.solvePosition;
        step_Count++;
    }
    
    gettimeofday(&end, NULL); 
    double t2 = 1000*(end.tv_sec) + end.tv_usec/1000.0;
    double t= t2 - t1;
    //[Lab07]
    std::cout<<"Total Iterations: "<< no_of_steps<<"\n";
    std::cout<<"Average time per step is "<< time_taken_for_step/no_of_steps<<" ms\n";
    std::cout<<"Average time for collisions is "<<time_taken_for_collisions/no_of_steps<<" ms\n";
    std::cout<<"Average time for velocity updates is "<<time_taken_for_velocity_update/no_of_steps<<" ms\n";
    std::cout<<"Average time for position updates is "<<time_taken_for_position_update/no_of_steps<<" ms\n\n";
    std::cout<<"Total time for loop is "<<t<<" ms"<<std::endl;
    //std::cout <<t/1000
    //<<std::endl;
}

int main	(	int	argc,
		char **	argv
	)

This is the main function.

[Lab05] Computing average time for no_of_steps iterations:

Definition at line 115 of file main.cpp.

{
  test_count = 1;
  test_index = 0;
  test_selection = test_index;
  
  entry = sim;
  test = entry->create_fcn();

  // Command Line argument for number of iterations
  int no_of_steps = 0;
  if(argc == 1) no_of_steps = 100;   //Default Value
  else no_of_steps = atoi(argv[1]);
  average_time(no_of_steps);
 
  return 0;
}