c:graphics.h:putpixel
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c:graphics.h:putpixel [2015/05/06 23:06] |
c:graphics.h:putpixel [2024/02/16 01:05] (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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