Chaos Game Square n positions away

Data de publicació: Mar 12, 2018 8:39:56 AM

#include <X11/Xlib.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#define W_W 1000

#define H_W 1000

typedef struct punt{

    int x;

    int y;

} t_punt;

void _wait_for(int n);

void _init_aleat();

int _aleat(int N);

int _aleat_diff(int N, int vertex);

int _nplaces_away_from_vertex(int vertex, int n_places, int N);

int     kaos( Display *foli, Window finestra, GC gc, int x, int y, unsigned int width, unsigned int height);

int main(void) {

   Display *foli;

   Window finestra;

   XEvent event;

   int id_foli;

   int x, y;

   foli = XOpenDisplay(NULL);

   if (foli == NULL) {fprintf(stderr, "No puc crear la zona de dibuix \n"); exit(1);}

   id_foli = XDefaultScreen(foli);

   finestra = XCreateSimpleWindow(foli, RootWindow(foli, id_foli), 10, 10, W_W, H_W, 1, BlackPixel(foli, id_foli), WhitePixel(foli, id_foli));

   XSelectInput(foli, finestra, ExposureMask | KeyPressMask);

   XMapWindow(foli, finestra);

   _init_aleat();

   x = _aleat(W_W);

   y = _aleat(H_W);

   while (1) {

    XNextEvent(foli, &event);

    switch(event.type){

        case Expose:    kaos(foli, finestra, DefaultGC(foli, id_foli), x, y, W_W, H_W);

                        break;

        case KeyPress:  break;

        default:        break;

    }

   }

   XCloseDisplay(foli);

   return 0;

}

int kaos( Display *foli, Window finestra, GC gc, int x_0, int y_0, unsigned int width, unsigned int height){

int i;

int vertex, next_vertex;

t_punt POLIGON[4], punt;

int N;

 punt.x = x_0;

 punt.y = y_0;

 N = 2;

 //Vertex 0

 POLIGON[0].x = 0;

 POLIGON[0].y = 0;

 XFillRectangle(foli, finestra, gc, POLIGON[0].x, POLIGON[0].y, 4, 4);

 //Vertex 1

 POLIGON[1].x = 0;

 POLIGON[1].y = height;

 XFillRectangle(foli, finestra, gc, POLIGON[1].x, POLIGON[1].y, 4, 4);

 //Vertex 2

 POLIGON[2].x = width;

 POLIGON[2].y = 0;

 XFillRectangle(foli, finestra, gc, POLIGON[2].x, POLIGON[2].y, 4, 4);

 //Vertex 3

 POLIGON[3].x = width;

 POLIGON[3].y = height;

 XFillRectangle(foli, finestra, gc, POLIGON[3].x, POLIGON[3].y, 4, 4);

 vertex = _aleat(4);

 for ( i = 0; i < 10000000; i++ ) {

    _wait_for(100);

    XFillRectangle(foli, finestra, gc, punt.x, punt.y, 1, 1);

    vertex = _aleat_diff(4, _nplaces_away_from_vertex(vertex, 2, 4));

    punt.x = punt.x + (POLIGON[vertex].x - punt.x) / N;

    punt.y = punt.y + (POLIGON[vertex].y - punt.y) / N;

 }

}

void    _init_aleat(){srand(time(NULL));}

int    _aleat(int N){return rand()%N;}

void    _wait_for(int n){int i; for ( i = 0; i < n; i++ );}

int    _aleat_diff(int N, int vertex){

        int v;

        v = _aleat(N);

        while ( v == vertex ) v = _aleat(N);

        return v;

 }

int _nplaces_away_from_vertex(int vertex, int n_places, int N){return ( (vertex + n_places) % N );}

gcc chaos_game_square.c -L/usr/X11R6/lib -lX11 -o chaos_game_square