c:graphics.h:floodfill
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c:graphics.h:floodfill [2015/05/06 23:06] |
c:graphics.h:floodfill [2024/02/16 01:05] (current) |
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| + | ===== floodfill ===== | ||
| + | |||
| + | |||
| + | ====Syntax of floodfill ==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | void floodfill(int x, int y, int border); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of floodfill ==== | ||
| + | <code c> | ||
| + | floodfill fills an enclosed area on bitmap devices. (x,y) is a "seed | ||
| + | point" within the enclosed area to be filled. The area bounded by the | ||
| + | color border is flooded with the current fill pattern and fill color. If | ||
| + | the seed point is within an enclosed area, the inside will be filled. If | ||
| + | the seed is outside the enclosed area, the exterior will be filled. | ||
| + | Use fillpoly instead of floodfill whenever possible so that you can | ||
| + | maintain code compatibility with future versions. | ||
| + | floodfill does not work with the IBM-8514 driver. | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of floodfill ==== | ||
| + | <code c> | ||
| + | /* floodfill example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main(void) | ||
| + | { | ||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | int maxx, maxy; | ||
| + | |||
| + | |||
| + | /* 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(); | ||
| + | maxy = getmaxy(); | ||
| + | |||
| + | /* select drawing color */ | ||
| + | setcolor(getmaxcolor()); | ||
| + | |||
| + | |||
| + | /* select fill color */ | ||
| + | setfillstyle(SOLID_FILL, getmaxcolor()); | ||
| + | |||
| + | /* draw a border around the screen */ | ||
| + | rectangle(0, 0, maxx, maxy); | ||
| + | |||
| + | /* draw some circles */ | ||
| + | circle(maxx / 3, maxy /2, 50); | ||
| + | circle(maxx / 2, 20, 100); | ||
| + | |||
| + | circle(maxx-20, maxy-50, 75); | ||
| + | circle(20, maxy-20, 25); | ||
| + | |||
| + | /* wait for a key */ | ||
| + | getch(); | ||
| + | |||
| + | /* fill in bounded region */ | ||
| + | floodfill(2, 2, getmaxcolor()); | ||
| + | |||
| + | /* clean up */ | ||
| + | getch(); | ||
| + | closegraph(); | ||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[drawpoly]] | ||
| + | [[fillpoly]] | ||
| + | [[graphresult]] | ||
| + | [[setcolor]] | ||
| + | [[setfillstyle]] | ||
| + | |||
| + | |||
| + | ===== output of floodfill example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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