c:graphics.h:pieslice
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c:graphics.h:pieslice [2015/05/06 23:06] |
c:graphics.h:pieslice [2024/02/16 01:05] (current) |
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| + | ===== pieslice ===== | ||
| + | |||
| + | |||
| + | ====Syntax of pieslice ==== | ||
| + | <code c> | ||
| + | #include <graphics.h> | ||
| + | void pieslice(int x, int y, int stangle, int endangle, int radius); | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Description of pieslice ==== | ||
| + | <code c> | ||
| + | pieslice draws and fills a pie slice centered at (x,y) with a radius | ||
| + | given by radius. The slice travels from stangle to endangle. The slice is | ||
| + | outlined in the current drawing color and then filled using the current | ||
| + | fill pattern and fill color. | ||
| + | The angles for pieslice are given in degrees. They are measured | ||
| + | counterclockwise, with 0 degrees at 3 o'clock, 90 degrees at 12 o'clock, | ||
| + | and so on. | ||
| + | If you're using a CGA or monochrome adapter, the examples in online Help | ||
| + | that show how to use graphics functions might not produce the expected | ||
| + | results. If your system runs on a CGA or monochrome adapter, use the | ||
| + | value 1 (one) instead of the symbolic color constant, and see the second | ||
| + | example under arc whis shows how to use the pieslice function. | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== Example of pieslice ==== | ||
| + | <code c> | ||
| + | /* pieslice example */ | ||
| + | |||
| + | #include <graphics.h> | ||
| + | #include <stdlib.h> | ||
| + | #include <stdio.h> | ||
| + | #include <conio.h> | ||
| + | |||
| + | int main(void) | ||
| + | { | ||
| + | /* request autodetection */ | ||
| + | int gdriver = DETECT, gmode, errorcode; | ||
| + | int midx, midy; | ||
| + | int stangle = 45, endangle = 135, radius = 100; | ||
| + | |||
| + | /* 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 */ | ||
| + | } | ||
| + | |||
| + | midx = getmaxx() / 2; | ||
| + | midy = getmaxy() / 2; | ||
| + | |||
| + | /* set fill style and draw a pie slice */ | ||
| + | setfillstyle(EMPTY_FILL, getmaxcolor()); | ||
| + | pieslice(midx, midy, stangle, endangle, radius); | ||
| + | |||
| + | /* clean up */ | ||
| + | getch(); | ||
| + | closegraph(); | ||
| + | return 0; | ||
| + | } | ||
| + | </code> | ||
| + | |||
| + | |||
| + | ==== See also ==== | ||
| + | [[fillelipse]] | ||
| + | [[graphresult]] | ||
| + | [[sector]] | ||
| + | [[setfillstyle]] | ||
| + | |||
| + | |||
| + | ===== output of pieslice example ===== | ||
| + | |||
| + | no output of example at the moment | ||
| + | do not hesitate and add it... | ||
| + | |||
| + | |||
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