2. C-Animation

A Simple Animation in C?

Animation in C in linux follows the steps below

• clear the terminal
• print the frame
• sleep for awhile
• repeat the steps above in a while or for loop

Demonstration

Code

#define _DEFAULT_SOURCE /* Do not remove this. Required for time.h. Must be the on the top */
#include <time.h> /* Do not remove this. Required for newSleep */

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

void newSleep(float sec)
{
  struct timespec ts;
  ts.tv_sec = (int) sec;
  ts.tv_nsec = (sec - ((int) sec)) * 1000000000;
  nanosleep(&ts,NULL);
}

void printArray(char* pMap, int iLen)
{
    int i;
    for (i = 0 ;  i < iLen ; i++)
    {
        printf("%c", pMap[i]);
    }
    printf("\n");
}

void progressBarAnimation(char* pMap, int iLen)
{
    int i;

    /* Set the object on the array and animate*/
    for (i = 0 /* start position */ ;  i < iLen ; i++)
    {
        system("clear");     /* Clear the terminal */
        pMap[i] = '>';       /* Set */
        printArray(pMap, iLen);
        newSleep(1);

    }

    /* Clear the whole array before exit */
    memset(pMap, ' ', sizeof(char) * iLen);
}

void movementAnimation(char* pMap, int iLen)
{
    int i;

    /* Set the object on the array and animate*/
    for (i = 0 /* start position */ ;  i < iLen ; i++)
    {
        system("clear");     /* Clear the terminal */
        pMap[i] = '>';       /* Set */
        printArray(pMap, iLen);
        newSleep(1);
        pMap[i] = ' ';       /* Reset */
    }

    system("clear"); /* Clear terminal before exit */
}

int main()
{
    int iLen = 10;
    char* arrcMap = (char*) malloc(sizeof(int*) * iLen);
    memset(arrcMap, ' ', sizeof(char) * iLen); /* initialize to space char */

    progressBarAnimation(arrcMap, iLen);
    movementAnimation(arrcMap, iLen);

    free(arrcMap);
    return 0;
}