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sim.c
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sim.c
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/* File name: sim.c
*
* Description:
* Responsible for interpreting user input and calling the appropriate module
* to proccess the data(error/generator/particle/black_hole) depending on the
* type of execution mode(Simulation, Graphic, etc...).
* When an error is detected, the execution of the program stops.
*
* Date: 14.05.2019
* Version: 3.04
*
* Authors - SCIPER:
* Alexis Philip George-Georganopoulos - 228168
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "constantes.h"
#include "error.h"
#include "generator.h"
#include "black_hole.h"
#include "particle.h"
#define NB_ELEMENTS 3
enum STATE {GENERATOR, BLACK_HOLE, PARTICLE};
enum MODE {ERROR, FORCE, INTEGRATION, GRAPHIC, SIMULATION, NOT_VALID};
static void decodage(enum STATE * state, FILE * fichier);
static void decodage_nb(enum STATE state, int * p_nb, char * ligne);
static float compare_2 (float a, float b, int type);
static int particle_selected;
//------------------------------------------------------------------------------
// redirects user input in file to other functions that test its validity and
// memorize the data
void lecture(enum MODE mode, const char* open_file)
{
int nb;
enum STATE state = GENERATOR;
char ligne[LIGNE];
FILE * fichier = NULL;
char quick_fix[15] = "load_files/";//TODO more robust folder management
if((fichier = fopen(strcat(quick_fix,open_file), "r")) != NULL)
{
while(fgets(ligne, LIGNE, fichier))
{
if((ligne[0]=='#')||(ligne[0]=='\n')||(ligne[0]=='\r'))
continue;
decodage_nb(state, &nb, ligne);
decodage(&state, fichier);
}
}
else
{
error_fichier_inexistant();
exit(EXIT_FAILURE);
}
if((int) state != NB_ELEMENTS)
{
error_fichier_incomplet();
exit(EXIT_FAILURE);
}
fclose(fichier);
if(mode == ERROR)
{
error_success();
exit(EXIT_SUCCESS);
}
else if(mode == FORCE)
{
particule_force_rendu1();
exit(EXIT_SUCCESS);
}
else if(mode == INTEGRATION)
{
particule_integration_rendu2();
exit(EXIT_SUCCESS);
}
else if(mode == GRAPHIC);
else if(mode == SIMULATION);
else error_msg("mode de test inutilisé");
}
//------------------------------------------------------------------------------
// draws everything
void redraw_all(void)
{
draw_particles();
draw_black_holes();
draw_generators();
}
//------------------------------------------------------------------------------
// updates what is shown in window when "step" button is pressed, or when
// simultion is running
void sim_update(void)
{
particle_update();
int nbg, i;
get_nb_g(&nbg);
for(i=0; i<nbg; i++)
{
// probability is a number between 1 and 200 (inclusive), with each
// number equally likely to occur.
int probability = (int) (200. * rand() / (RAND_MAX + 1.)) + 1;
// a particle is generated on average once ever 200 DELTA_Ts
if(probability<=1) particle_generate(i);
}
}
//------------------------------------------------------------------------------
// calls for a function that selects a particle (prevents the selected particle
// from moving) when a person clicks on the window
void sim_select(double mouse_x, double mouse_y)
{
particle_selected = particle_select(mouse_x, mouse_y);
}
//------------------------------------------------------------------------------
// calls for a function that allows selected particle to move when user stops
// pressing on glut window
void sim_release(void)
{
particle_release();
}
//------------------------------------------------------------------------------
// deletes particle if particle is selected, otherwise deletes closest
// black hole or generator
void sim_delete(double mouse_x, double mouse_y)
{
if(particle_selected) particle_user_delete();
else
{
// if there are no bh's or g's: bh or g_distance = -1
double bh_distance = black_hole_distance(mouse_x, mouse_y);
double g_distance = generator_distance(mouse_x, mouse_y);
if(((g_distance < bh_distance) || bh_distance < 0) && g_distance>=0)
generator_delete(mouse_x, mouse_y);
else if(((bh_distance <= g_distance)||g_distance < 0) && bh_distance>=0)
black_hole_delete(mouse_x, mouse_y);
}
}
//------------------------------------------------------------------------------
// gets the nb of all elements and sends them to main
void get_nb(int *a, int *b, int *c)
{
get_nb_g(a);
get_nb_bh(b);
get_nb_p(c);
}
//------------------------------------------------------------------------------
// writes save file user inputs
void ecriture(const char *save_name)
{
FILE *save_file = fopen(save_name, "w");
save_data_g(save_file);
save_data_bh(save_file);
save_data_p(save_file);
fclose(save_file);
}
//------------------------------------------------------------------------------
// compares all postion data to obtain final viewport values
void get_viewport(float *x_min, float *x_max, float *y_min, float *y_max)
{
float x_min1, x_min2, x_min3, x_max1, x_max2, x_max3, y_min1, y_min2, y_min3,
y_max1, y_max2, y_max3;
int a = viewport_g(&x_min1, &x_max1, &y_min1, &y_max1);
int b = viewport_bh(&x_min2, &x_max2, &y_min2, &y_max2);
int c = viewport_p(&x_min3, &x_max3, &y_min3, &y_max3);
switch(a+b+c)
{
case 3 :
*x_min = compare_2(x_min1, compare_2(x_min2, x_min3, -1), -1)-RMAX;
*x_max = compare_2(x_max1, compare_2(x_max2, x_max3, 1), 1) + RMAX;
*y_min = compare_2(y_min1, compare_2(y_min2, y_min3, -1), -1)-RMAX;
*y_max = compare_2(y_max1, compare_2(y_max2, y_max3, 1), 1) + RMAX;
break;
case 2 :
if(a+b == 2)
{
*x_min = compare_2(x_min1, x_min2, -1)- RMAX;
*x_max = compare_2(x_max1, x_max2, 1) + RMAX;
*y_min = compare_2(y_min1, y_min2, -1)- RMAX;
*y_max = compare_2(y_max1, y_max2, 1) + RMAX;
}
else if(b+c == 2)
{
*x_min = compare_2(x_min2, x_min3, -1)- RMAX;
*x_max = compare_2(x_max2, x_max3, 1) + RMAX;
*y_min = compare_2(y_min2, y_min3, -1)- RMAX;
*y_max = compare_2(y_max2, y_max3, 1) + RMAX;
}
else
{
*x_min = compare_2(x_min1, x_min3, -1)- RMAX;
*x_max = compare_2(x_max1, x_max3, 1) + RMAX;
*y_min = compare_2(y_min1, y_min3, -1)- RMAX;
*y_max = compare_2(y_max1, y_max3, 1) + RMAX;
}
break;
case 1 :
if(a)
{
*x_min = x_min1 - RMAX; *x_max = x_max1 + RMAX;
*y_min = y_min1 - RMAX; *y_max = y_max1 + RMAX;
}
else if(b)
{
*x_min = x_min2 - RMAX; *x_max = x_max2 + RMAX;
*y_min = y_min2 - RMAX; *y_max = y_max2 + RMAX;
}
else
{
*x_min = x_min3 - RMAX; *x_max = x_max3 + RMAX;
*y_min = y_min3 - RMAX; *y_max = y_max3 + RMAX;
}
break;
case 0 : break;
default :
error_msg("in: get_viewport\n");
exit(EXIT_FAILURE);
}
}
//------------------------------------------------------------------------------
// depending on the state of the reading, this reads the number of generators,
// black holes or particles.
static void decodage_nb(enum STATE state, int * p_nb, char * ligne)
{
switch(state)
{
case GENERATOR:
read_nb_gen(p_nb, ligne);
break;
case BLACK_HOLE:
read_nb_hole(p_nb, ligne);
break;
case PARTICLE:
read_nb_part(p_nb, ligne);
break;
}
}
//------------------------------------------------------------------------------
// depending on the state of reading this calls for functions that test and
// memorize the data in their appropriate modules
static void decodage(enum STATE * state, FILE * fichier)
{
switch(*state)
{
case GENERATOR:
read_gen(fichier, (int *) state);
break;
case BLACK_HOLE:
read_hole(fichier, (int *) state);
break;
case PARTICLE:
read_particle(fichier, (int *) state);
break;
}
}
//------------------------------------------------------------------------------
// compares 2 values and gives min or max upon demand
static float compare_2 (float a, float b, int type)
{
switch(type)
{
case -1 :
if(a < b) return a;
else return b;
break;
case 1 :
if(a < b) return b;
else return a;
break;
default :
error_msg("in: compare_2");
exit(EXIT_FAILURE);
}
}