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c:graphics.h:putpixel

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c:graphics.h:putpixel [2015/05/06 23:06] (current)
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 +===== putpixel =====
 +
 +
 +====Syntax of putpixel ==== 
 + <code c>
 +#include <graphics.h>
 +void putpixel(int x, int y, int color);
 +  </code>
 +
 +
 +==== Description of putpixel ==== 
 +<code c>
 +putpixel plots a point in the color defined by color at (x,y).
 +</code>
 +
 +
 +==== Example of putpixel ====
 +<code c>
 +/* putpixel example */
 +
 +#include <graphics.h>
 +#include <stdlib.h>
 +#include <stdio.h>
 +#include <conio.h>
 +#include <dos.h>
 +
 +#define PIXEL_COUNT 1000
 +#define DELAY_TIME  100  /* in milliseconds */
 +
 +int main()
 +{
 +   /* request autodetection */
 +   int gdriver = DETECT, gmode, errorcode;
 +   int i, x, y, color, maxx, maxy, maxcolor, seed;
 +
 +   /* initialize graphics and local variables */
 +   initgraph(&gdriver, &gmode, "");
 +
 +   /* read result of initialization */
 +   errorcode = graphresult();
 +
 +   if (errorcode != grOk) {  /* an error occurred */
 +printf("Graphics error: %s\n", grapherrormsg(errorcode));
 +printf("Press any key to halt:");
 +getch();
 +exit(1);   /* terminate with an error code */
 +   }
 +
 +   maxx = getmaxx() + 1;
 +   maxy = getmaxy() + 1;
 +   maxcolor = getmaxcolor() + 1;
 +
 +   while (!kbhit())
 +   {
 +/* seed the random number generator */
 +seed = random(32767);
 +srand(seed);
 +for (i=0; i<PIXEL_COUNT; i++) {
 +
 +   x = random(maxx);
 +   y = random(maxy);
 +   color = random(maxcolor);
 +   putpixel(x, y, color);
 +}
 +delay(DELAY_TIME);
 +srand(seed);
 +for (i=0; i<PIXEL_COUNT; i++) {
 +   x = random(maxx);
 +   y = random(maxy);
 +   color = random(maxcolor);
 +   if (color == getpixel(x, y))
 +putpixel(x, y, 0);
 +}
 +   }
 +
 +   /* clean up */
 +   getch();
 +   closegraph();
 +   return 0;
 +}
 +</code>
 +
 +
 +==== See also ====
 +[[getpixel]]
 +[[putimage]]
 +
 +
 +===== output of putpixel example ===== 
 +
 +    no output of example at the moment
 +    do not hesitate and add it...  
 +
 +
  
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c/graphics.h/putpixel.txt · Last modified: 2015/05/06 23:06 (external edit)

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